20:01:10 発信元: *Tutor* Tatsuhiko OGAWA : http://phits.jaea.go.jp/tutorial/rec.html 20:01:39 発信元: *Tutor* Tatsuhiko OGAWA : 3.https://phits.jaea.go.jp/tutorial/Install_Python.pdf 20:02:34 発信元: *Tutor* Tatsuhiko OGAWA : https://git.oecd-nea.org/phits/package/phits-lecture/-/tree/main/advanced/DCHAIN1 20:03:04 発信元: 126 J.Omojola : I am having the warning below in my shielding simulation. How severe is it and what can I do to correct it. "warning in jamsfex:srtNew (Folder)* 20:09:01 発信元: *Tutor* Yusuke Matsuya : Replying to "I am having the warn..." Just in case, the JAM is the model for higher energy neutron and protons, to my remember. It seems to be a warming. So, if you simulate neutron and protons with lower than 3 GeV, you do not need to worry. 20:09:14 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "I am having the warn..." Even if this happens often, this message is trivial. This message means that total mass and energy after an energetic hadronic reactions did not conserve. But in this case, this simulation is calculated afresh until conservation law is satisfied. So you don't have to worry about this message. 20:10:12 発信元: 126 J.Omojola : Replying to "I am having the warn..." It occurs like 5 times in maxcas 10000 and maxbch 100. 20:11:03 発信元: *Tutor* Ohnishi Seiki : Replying to "Why, when I copy an ..." If you have the input line "file=input.inp", you should modify this line after copy/create a folder because this is the input file you are about to run. 20:11:48 発信元: 161 M. Afton Muhandis Main : hi sensei, are we going study about lattice? i am still confused about placement of universe 20:11:49 発信元: 126 J.Omojola : Replying to "I am having the warn..." Thank you so much. 20:12:10 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "Why, when I copy an ..." Please also make sure that your input file name does not have a space like "input copy.inp" 20:12:43 発信元: *Tutor* Yusuke Matsuya : Replying to "Regarding histories,..." Increasing maxcas will slow down the display speed. If you want to monitor periodically, it is recommended to set it small. On the other hand, if you set it too small and increase maxbch, the calculation will be a little slower because the tally will be summarized for each batch. Of course, this depends on the calculation conditions. 20:13:36 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "hi sensei, are we go..." Unfortunately, there are no lectures on lattice in this course. If you would like to discuss your input using lattice, you can raise hand whenever (maybe after the course?) and discuss with us in a breakout session. 20:14:05 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "Thank you so much." with 👍 20:14:13 発信元: Anton Moroz : Reacted to "hi sensei, are we go..." with 😳 20:14:19 発信元: Anton Moroz : Removed a 😳 reaction from "hi sensei, are we go..." 20:14:38 発信元: *Tutor* Hunter Ratliff : Replying to "Regarding histories,..." One thing to add, if you're using shared-memory parallelization with istdev=1 "batch variance mode" (otherwise, normally this is suggested to set to 2, "history variance mode"), then the number of batches should be set to a higher value (more than 10). 20:15:28 発信元: *Tutor* Yusuke Matsuya : Replying to "hi sensei, are we go..." Just in case, you can find the lecture folder “phits/lecture/advanced/voxcel”. 20:15:59 発信元: 161 M. Afton Muhandis Main : Replying to "hi sensei, are we go..." okey thank you sensei 20:18:12 発信元: 208 S.Laca : what is axis=eng? 20:18:23 発信元: 110 I. Casalbore : Replying to "Regarding histories,..." There are important differences in the results if using istdev = 1 or = 2 when using shared-memory parallelization? 20:18:54 発信元: 208 S.Calistri : Good evening Sensei, I have a question: which tally should I use if I want to see how the neutrons energy changes depending on the depth of my geometry (z-axis)? 20:18:55 発信元: *Tutor* Hunter Ratliff : The actual tally result should be the same; it's just that the statistical uncertainties are calculated differently. 20:19:26 発信元: *Tutor* SHIGYO Nobuhiro : Replying to "what is axis=eng?" The horizontal axis represents particle energy. 20:20:08 発信元: 208 S.Laca : The horizontal axis represents particle energy. thank you 20:20:58 発信元: *Tutor* Hunter Ratliff : Replying to "Regarding histories,..." For example, if you have maxcas=1000000, and maxbch=1, with istdev=2 you'll probably have reasonably low uncertainty but with istdev=1 you'd have 100% uncertainty (since there is only one batch to calculate the variance from) 20:21:22 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "okey thank you sense..." with 👍 20:22:11 発信元: *Tutor* Ohnishi Seiki : Replying to "Good evening Sensei,..." As long as you set energy bins by e-types, any tallies are OK. Generally speaking, the t-track shows the best stability and counting efficiency. 20:22:44 発信元: 208 S.Calistri : Replying to "Good evening Sensei,..." Thank you very much 20:23:04 発信元: *Tutor* Ohnishi Seiki : Replying to "Good evening Sensei,..." If you need flux in a very thin region, t-cross is better. 20:23:07 発信元: 100 Herlan Setiawan : Reacted to "Please also make sur..." with 👍 20:23:32 発信元: 208 S.Calistri : Reacted to "If you need flux in ..." with 👍 20:25:43 発信元: 028 Amiegbereta Edwin Ehis : just logged in, kindly help me with the course/lecture in progress 20:25:50 発信元: *Tutor* Hunter Ratliff : Replying to "Regarding histories,..." So, if you wanted a million histories with istdev=1 (which is forced in shared-memory parallelization), it would be better to split the histories to something like maxbch=100 and maxcas=10000. But, in general, the recommendation is to use istdev = +/- 2 whenever possible unless you have a specific reason to use istdev=1 (shared memory parallelization or a huge tally mesh (e.g., very fine xyz mesh, high memory footprint) for which istdev=2 causes a noticeably large slow-down in the calculation). 20:26:47 発信元: *Tutor* Hunter Ratliff : Replying to "just logged in, kind..." \phits\lecture\advanced\sourceA 20:27:12 発信元: 028 Amiegbereta Edwin Ehis : Replying to "just logged in, kind..." thanks 20:28:08 発信元: 110 I. Casalbore : Reacted to "So, if you wanted a ..." with 👍 20:28:28 発信元: 110 I. Casalbore : Replying to "Regarding histories,..." Thank you very much, it is super clear now! 20:31:38 発信元: 096 Handy Nugraha : sorry, what r0 = 0 means? 20:31:40 発信元: Anton Moroz : Replying to "Regarding histories,..." Sorry, would you say it's ok to use istdev=-1 if I realize I have not accumulated enough statistics? Or better to restart with higher number of histories? 20:32:08 発信元: 126 J.Omojola : Replying to "sorry, what r0 = 0 m..." point source 20:32:36 発信元: 171 N. Stoffle : Replying to "sorry, what r0 = 0 m..." What is the effect if you set r0 as non-zero for isotropic sources? 20:33:16 発信元: 096 Handy Nugraha : Replying to "sorry, what r0 = 0 m..." @171 N. Stoffle yea, that's my next question 20:33:26 発信元: 144 Margarita Tzivaki : When entering an energy spectrum (Energy and Intensity) will it have to be normalized or does phits renormalize automatically? So for example if I use a SCALE output, the intensity is typically not be normalized. Can I use it as is or do the intensities have to add up to 1? 20:34:07 発信元: *Tutor* Yusuke Matsuya : Replying to "sorry, what r0 = 0 m..." s-type = 1 means the cylinder distribution source. SO, r0 means radius of cylinder source. 20:34:32 発信元: *Tutor* Hunter Ratliff : Replying to "sorry, what r0 = 0 m..." s-type=1 is for a cylindrical source, but if you set the radius r0 equal to 0, it just becomes a line source. and if you set its length to zero (z0=z1), then it's just a point source. Source particle spawn locations are sampled from the volume defined by this cylinder. Angular/direction distributions are set separately with dir, phi, and dom parameters 20:35:06 発信元: 264 + Kebede Shogile : Replying to "sorry, what r0 = 0 m..." How we define hemisphere source? 20:35:18 発信元: *Tutor* Hunter Ratliff : Replying to "sorry, what r0 = 0 m..." but with dir=all, this means all particles spawned within the cylinder have equal probability of going in any direction 20:35:37 発信元: *Tutor* Ohnishi Seiki : The source spectrum will be normalized automatically. So you can use it as it is. 20:36:13 発信元: 144 Margarita Tzivaki : Hat auf "The source spectru..." mit 👍 reagiert 20:36:15 発信元: 264 + Kebede Shogile : How we define hemisphere source? 20:36:37 発信元: *Tutor* Yusuke Matsuya : Replying to "When entering an ene..." Yes! PHITS code will automatically normalize the input intensities, so it's fine to enter relative values. 20:37:27 発信元: *Tutor* Ohnishi Seiki : But it should be noticed that the spectum is group-integrated or differencial (normalized by the group width). 20:38:02 発信元: 208 S.Laca : In t-cross section how do we decide which is the area? 20:38:27 発信元: Anton Moroz : Reacted to "The source spectrum ..." with 👍 20:38:40 発信元: *Tutor* Hunter Ratliff : Replying to "sorry, what r0 = 0 m..." @264 + Kebede Shogile I'd probably use a s-type=9 but then bisect the sphere with a region that only contains the half of the sphere of interest and then use the reg parameter within the source section. (There might be a fancier way of doing this though with the in-built parameters? But this method here also works perfectly fine.) 20:38:58 発信元: *Tutor* Yusuke Matsuya : Replying to "How we define hemisp..." One idea is that phits can generate radiation sources from a defined region. Just put reg=** in the source section. You can set radiation sources of various shapes. 20:40:51 発信元: *Tutor* Yusuke Matsuya : Replying to "In t-cross section h..." For xyz and rz meshes, the area is automatically calculated from the set x,y,z,and r in the PHITS code. 20:41:40 発信元: 264 + Kebede Shogile : Can we generate hemisphere source from solid hemisphere or hemisphere shell? If this works, please, would you guide me with it? 20:43:12 発信元: *Tutor* Hunter Ratliff : But if using reg mesh with r-from and r-to, then you have to calculate that manually. (or just set it to 1 and do any area normalizations in post-processing) 20:44:26 発信元: 096 Handy Nugraha : Replying to "How we define hemisp..." @*Tutor* Yusuke Matsuya can that reg=** refers to specific cell geometry? 20:45:29 発信元: 110 I. Casalbore : Hi, with PHITS v.3.34 I have used e-type = 28, 29 with alpha and neutrons. I have noticed that the source was different when simulating both alphas and neutrons and when doing separate simulations with only neutrons or only alphas. Do you know why this happens? 20:47:19 発信元: 208 S.Laca : Respondiendo a "In t-cross section..." okei thank you 20:47:28 発信元: *Tutor* Yusuke Matsuya : Replying to "How we define hemisp..." Possible. After definfing the region number = 1 in the cell section (this is the solid material), please define as follow. [ S o u r c e ] s-type = 1 proj = proton 　　： reg = 1 　　： It should be noted that the source volume should be a little bit larger than that of reg #1. 20:48:12 発信元: Anton Moroz : How do I define a source with given number of particles at given energy? Do I have to set totfact to integral of all particles? 20:48:40 発信元: Anton Moroz : Replying to "How do I define a so..." I mean a specific measured spectrum with exact number of particles in a bin 20:50:03 発信元: *Tutor* Ohnishi Seiki : Replying to "Hi, with PHITS v.3.3..." I think this is cause by the normalization. If you use e-type 28 the results are normalized by sec(Bq) in default, however separated calculation results are normalized by the total source number(or weight). 20:52:12 発信元: 110 I. Casalbore : Replying to "Hi, with PHITS v.3.3..." So which one is the case reproducing correctly the source? 20:53:08 発信元: *Tutor* Yusuke Matsuya : Replying to "How do I define a so..." totfact is a normalization parameter. If you want to compare with experimental values, you need to correct the phits results with totofact. On the other hand, if you generate a mixture of spectra or various radiation sources, you’d better use the multi-source function. 20:54:02 発信元: 096 Handy Nugraha : Replying to "How we define hemisp..." sorry i dont understand how it should be larger? by mentioning reg = 1, is it automatically copy the cell directly? how add that little volume? and at what scale? 20:54:07 発信元: Anton Moroz : Replying to "How do I define a so..." Sorry, but can I define a spectrum in absolute numbers of particles? 20:55:23 発信元: *Tutor* Ohnishi Seiki : Replying to "Hi, with PHITS v.3.3..." It depends on which kind of data you have. You have a specific Bqs of confined RI, e-type 28 is useful. 20:56:47 発信元: *Tutor* Hunter Ratliff : Replying to "Hi, with PHITS v.3.3..." They both should produce the same result with enough statistics; e-type 28 just samples the source "normally" while e-type=29 equally samples across all emissions but adjusts the particle weights of these emissions corresponding to the relative emission probabilities. 20:56:49 発信元: *Tutor* Ohnishi Seiki : Replying to "Hi, with PHITS v.3.3..." If you have the data obtained by a beam monitor in an accelerator in the unit of neutron/s usual e-type is convenient. 20:56:56 発信元: *Tutor* Yusuke Matsuya : Replying to "How do I define a so..." In PHITS, the results are always normalized as /source. So please correct the results to be the absolute value (desired result) using totfact. Spectra can be generated by specifying the intensity, as explained in this lecture. 20:57:22 発信元: 110 I. Casalbore : I'm sorry, maybe we are saying different things. All simulations were with e-type 28. One simulation with part = alpha neutron and one with part = neutron. I was expecting the same neutron production in the two simulations since they come from the decay of the same isotopes, but they were different 20:57:46 発信元: Anton Moroz : Replying to "How do I define a so..." And totfact in this case will be an integral value of particles in the spectrum? 20:57:47 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "How we define hemisp..." This file set is an example of a semispherical source. Thanks to "reg = 4" The sources are sampled from upper hemisphere. 20:57:49 発信元: Anton Moroz : Reacted to "In PHITS, the result..." with 👍 20:59:07 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "How we define hemisp..." In this case, the source radius is 200cm defined by r1 and r2 parameters in source section. But cell 4 is defined as a sphere with radius 200+0.1 cm as in line 44. 21:00:14 発信元: *Tutor* Hunter Ratliff : Replying to "How do I define a so..." It depends on what units you want the results to be in. If you want it to be a rate, you'd set totfact to your source intensity in particles per second, meaning results would be scaled in tally units per second. If you want an time-integrated value, then you'd set totfact to a total number of particles over some irradiation period. 21:01:15 発信元: Anton Moroz : Reacted to "It depends on what u..." with 👍 21:01:53 発信元: *Tutor* Ohnishi Seiki : Replying to "Hi, with PHITS v.3.3..." It seems that there might be an issue somewhere. In PHITS, interactions between source particles are not considered, so running them separately or simultaneously should make the same results. We may need more detailed input data to investigate further. What kind of source do you use? 21:02:14 発信元: 144 Margarita Tzivaki : does this also work with complex decay chains (e.g. Uranium)? how is branching handled? Is there a cutoff for the consideration of very short or very long half lives? 21:03:40 発信元: 144 Margarita Tzivaki : Antworten an "does this also wor..." and which nuclide data library are the decay chains based on 21:04:05 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "Hi, with PHITS v.3.3..." In PHITS forum, there is a relevant post https://meteor.nucl.kyushu-u.ac.jp/phitsforum/t/topic/4155/6 and its solution https://meteor.nucl.kyushu-u.ac.jp/phitsforum/t/topic/4484 says that you should use "totfact = -1" If poor neutron statistics is the problem, this might be the solution. 21:05:01 発信元: 110 I. Casalbore : Replying to "Hi, with PHITS v.3.3..." The source was made by U235 and U238. Looking at phits.out I noticed that the totfact value was set to different values (by default, not by me). Maybe this might be the reason? 21:05:33 発信元: 096 Handy Nugraha : Replying to "How we define hemisp..." Okay, I see. but what happened/what is the different if I delete add reg = 4 (line 24) in that source definition? 21:06:48 発信元: *Tutor* Tatsuhiko OGAWA : If poor neutron statistics is your point, you should at least give it a try. If it does not solve your problem, feel free to ask us again. 21:07:42 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "How we define hemisp..." If you delete reg = 4 , the sources are sampled uniformly over the sphere. 21:07:59 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "How we define hemisp..." It will not be a hemisphere source anymore. 21:08:12 発信元: 110 I. Casalbore : Reacted to "In PHITS forum, ther..." with 👍 21:09:59 発信元: 100 Herlan Setiawan : So when we not defined the dtime in Cs-137 source, the gamma in 0,66MeV also appear.. what is that mean? 21:10:30 発信元: 171 N. Stoffle : Reacted to "but with dir=all, th..." with 👍 21:10:35 発信元: 096 Handy Nugraha : Replying to "How we define hemisp..." Okay thank you... 21:10:39 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "Okay thank you..." with 👍 21:14:21 発信元: *Tutor* Yusuke Matsuya : Replying to "So when we not defin..." As the default setting, dtime is set to be -10. That is why the gamma rays are generated. 21:14:26 発信元: Anton Moroz : why are there spots of electrons inside whole volume of water on t-track? 21:14:43 発信元: Anton Moroz : Reacted to "As the default setti..." with 👍 21:14:54 発信元: 100 Herlan Setiawan : Reacted to "As the default setti..." with 👍 21:15:20 発信元: Anton Moroz : Replying to "why are there spots ..." from pair production? 21:15:56 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "does this also work ..." RI source function is based on a database called DECDC Please see https://academic.oup.com/rpd/article/105/1-4/565/1601832 21:16:16 発信元: 144 Margarita Tzivaki : Hat auf "RI source function..." mit 👍 reagiert 21:17:10 発信元: 085_Fungki Iqlima Nasyidiah : sensei, sorry i cannot open my camera 21:17:17 発信元: 256SergioCapdevila : The same 21:17:29 発信元: 167 Nahuel Emiliano Ricart : mine says it's disabled by the host 21:17:43 発信元: *Tutor* Ohnishi Seiki : Replying to "why are there spots ..." Electrons may be generated by the Compton scatering and photo-electrick effect. 21:20:14 発信元: Anton Moroz : Reacted to "Electrons may be gen..." with 👍 21:22:09 発信元: 144 Margarita Tzivaki : Antworten an "Nachricht wurde vo..." does this also work with complex decay chains (e.g. Uranium)? how is branching handled? Is there a cutoff for the consideration of very short or very long half lives? 21:24:13 発信元: 096 Handy Nugraha : Reacted to "does this also work ..." with 👍 21:28:07 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "does this also work ..." DECDC considers all known decay chains. In case of Uranium, all isotopes down to U are considered. One exception is the nuclei whose activity is lower than 1e-10. They are disregarded. 21:28:30 発信元: 100 Herlan Setiawan : Can PHITS calculate the recoil energy of RI? Are there any input examples that can be used as a reference? 21:29:43 発信元: 144 Margarita Tzivaki : great thank you for that explanation. So branching is included in the DECDC resource I take it 21:30:33 発信元: 144 Margarita Tzivaki : Antworten an "Nachricht wurde vo..." What happens when defining a volume source with multiple nuclides one of which is very heavy (e.g. Uranium in fuel)? will the expected Bremsstrahlung be produced by the source definition or is it still necessary to go through the material definition of that cell to get it? 21:31:25 発信元: *Tutor* Hunter Ratliff : To my knowledge, I think you would need to write a user-defined source routine if you wanted to achieve this, where both the decay emission and recoiling parent/daughter have their momentum properly conserved. The built-in RI source only spawns the decay emission, not considering transport of the daughter nucleus. 21:31:34 発信元: *Tutor* Tatsu Sato : Replying to "Can PHITS calculate ..." Unfortunately not. You cannot consider recoil of RI in the PHITS simulation, unless you directly define energy and nucleus as an ion 21:36:43 発信元: *Tutor* Hunter Ratliff : If you only care about the total results, not the event-by-event results (e.g., coincidence detection), I suppose you could actually just do this in a multi source with energy distributions you calculate and define yourself and isotropic directions for both the decay emission and daughter nucleus. (Results should be accurate over a large number of histories in aggregate, just not within each individual history.) 21:41:51 発信元: 144 Margarita Tzivaki : I have another question on the source definitions if that's ok. What happens when defining a volume source with multiple nuclides one of which Uranium (e.g. in fuel)? will the expected Bremsstrahlung be produced by the source definition or is it still necessary to go through the material definition of that cell to get it? 21:42:09 発信元: 144 Margarita Tzivaki : Hat auf "DECDC considers al..." mit 👍 reagiert 21:46:26 発信元: *Tutor* Ohnishi Seiki : The source definition is used only for generating the primary source particle. If you need secondary particles created by interactions, material definitions are needed. 21:47:15 発信元: 264 + Kebede Shogile : How can we see it's 3D roatation? 21:47:58 発信元: 144 Margarita Tzivaki : Hat auf "The source definit..." mit 😮 reagiert 21:48:00 発信元: 144 Margarita Tzivaki : Hat auf "The source definit..." mit 👍 reagiert 21:48:02 発信元: 144 Margarita Tzivaki : Hat ein 😮 aus "The source definit..." entfernt 21:49:25 発信元: *Tutor* Hunter Ratliff : Replying to "How can we see it's ..." You can open the input in PHIG-3D (right-click, send to, PHIG-3D; or select from the "Program" menu in PhitsPad), if that's what you mean. 21:49:56 発信元: 264 + Kebede Shogile : Replying to "How can we see it's ..." Okay! Thank you! 21:50:06 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." thank you! so it's probably easier (and less computationally expensive) to get Bremsstrahlung from SCALE or some other decay code and then use it as a volume source of material Uranium and turn off Bremsstrahlung production in Phits. Is that correct? 21:51:31 発信元: *Tutor* Hunter Ratliff : Replying to "How can we see it's ..." For this exercise, I think it may still be a bit easier to visualize these transformations in the 2D plots, but PHIG-3D is great for double-checking more complex 3D translations and/or rotations. 21:51:51 発信元: 023 Al-Amin : share your screen plz 21:52:10 発信元: 014 ahid nurmanjaya : I got a problem, recently i move my input file to another folder. my running process was terminated because file is not found. I have try to reopen the input file but nothing change. Do you have any idea? 21:53:59 発信元: 224 T.DähnCostante : Besides the sign indicating the order, what does the value of M mean? 21:54:33 発信元: *Tutor* Ohnishi Seiki : Replying to "I have another quest..." I believe that is correct, provided that bremsstrahlung from other than the fuel elements can be neglected. 21:54:42 発信元: 144 Margarita Tzivaki : Hat auf "I believe that is ..." mit 👍 reagiert 21:55:23 発信元: 100 Herlan Setiawan : Replying to "{32E4CD4D-7D57-4D96-9936-90672B6CEA58}.png" don't use space on the folder/file name 😁 21:55:25 発信元: 028 Amiegbereta Edwin Ehis : I mistakenly delete the initial code on the transform.inp how do I restore it so that I van attend to the exercises? 21:55:26 発信元: *Tutor* Yuho Hirata : Replying to "{32E4CD4D-7D57-4D96-9936-90672B6CEA58}.png" It looks your folder or new input file inculde ".". PHITS may be can not read the file includes "." and " (brank)". 21:55:32 発信元: *Tutor* Hunter Ratliff : Can you re-run the input file through PHITS from its new folder location? 21:56:26 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." cool, thank you, very much appreciate your insight on this. I haven't tried disabling specific reaction types yet in phits, could you give me a hint where to find information of how to do this? 21:56:38 発信元: *Tutor* Hunter Ratliff : Replying to "{32E4CD4D-7D57-4D96-9936-90672B6CEA58}.png" ah, that's a good catch, the period is present in the folder name but not in the error message 21:56:57 発信元: 014 ahid nurmanjaya : Replying to "{32E4CD4D-7D57-4D96-9936-90672B6CEA58}.png" Thank you, i find my mistake, 21:57:38 発信元: 083 Firliyani : Replying to "I got a problem, rec..." maybe when you rename file or folder contains space. The file name or folder couldn't containing space 21:58:09 発信元: 264 + Kebede Shogile : Replying to "How can we see it's ..." I understand. Which file we need to send to PHIG-3D? I sent .inp file and couldn't see the boxe 21:58:19 発信元: *Tutor* Hunter Ratliff : Do you still have the "input" folder located at \phits\lecture\advanced\options\input ? If so, you can pick up from the current exercise with transform-3.inp in that directory. 21:59:08 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "I mistakenly delete ..." Please use this input to start from Exercise 3 21:59:19 発信元: 028 Amiegbereta Edwin Ehis : Replying to "I mistakenly delete ..." ok, I have it thanks 22:00:06 発信元: *Tutor* Hunter Ratliff : Replying to "How can we see it's ..." Once PHIG-3D is launched, you need to click the "Draw" button to render the selected cells (in this example, the cylinder should already be selected automatically) 22:00:32 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." Also I am assuming, that I can only turn off the wholereaction type (e.g. Bremsstrahlung) and not only the reaction between electrons and one type of material, is that correct? 22:00:34 発信元: *Tutor* Ohnishi Seiki : Replying to "I have another quest..." I'm sorry there is no such kind option to disable electron brems. That of muon can be disabled by imubrm parameter. I'm seeking the phits manual. 22:01:35 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." oh good to know, so I should make sure to always get my source spectra without bremsstrahlung if I intend to use them in phits 22:01:52 発信元: 144 Margarita Tzivaki : Hat auf "I'm sorry there is..." mit 👍 reagiert 22:03:00 発信元: *Tutor* Ohnishi Seiki : Replying to "I have another quest..." You are right. If you disasble electron transport, the bremsstrahlung photons are not produced. 22:03:14 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." I could probably just kill all electrons on production 22:03:18 発信元: 144 Margarita Tzivaki : Hat auf "You are right. If ..." mit 👍 reagiert 22:03:57 発信元: 264 + Kebede Shogile : Replying to "How can we see it's ..." I got it! Thank you! 22:04:31 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." ok, yes that's an option. Where can I find general information on which reactions can be turned off? 22:05:11 発信元: *Tutor* Hunter Ratliff : Yeah, I think that would be the strategy if using a separately generated Bremsstrahlung spectrum. I think the Bremsstrahlung production is handled by EGS5, which can be disabled with negs=-1 in [Parameters] (electrons/positrons not transported, photons transported using the internal PHITS algorithm) 22:05:30 発信元: 144 Margarita Tzivaki : Hat auf "Yeah, I think that..." mit 👍 reagiert 22:06:12 発信元: *Tutor* Hunter Ratliff : Reacted to "I got it! Thank you!" with 👍 22:07:40 発信元: *Tutor* Ohnishi Seiki : Replying to "I have another quest..." Please refer to the parameter section in the manual. PHITS provides only a limited number of options for biasing or disabling specific reactions, such as coherent scattering or photonuclear reactions 22:07:51 発信元: 144 Margarita Tzivaki : Hat auf "Please refer to th..." mit ❤️ reagiert 22:09:35 発信元: *Tutor* Hunter Ratliff : So, I think you could have PHITS calculate this with negs=1 with EGS5, but it would definitely be more computationally expensive than just providing it the Bremsstrahlung spectrum if you already have this produced from somewhere else and just setting negs=-1 (default value). (Though I guess this introduces some extra normalization work for scaling the results correctly.) 22:09:54 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." ah ok, so a strategic combination of calculation libraries (modules?) is a nice option which I had never considered. That is food for thought, thank you 22:13:32 発信元: 144 Margarita Tzivaki : Hat auf "So, I think you co..." mit 👍 reagiert 22:13:59 発信元: *Tutor* Hunter Ratliff : Replying to "I have another quest..." One thing to note, which will be touched on at the end of this lecture, the [Counter] section can also be used to isolate events of all sorts of different reaction types, including Bremsstrahlung specifically too. 22:14:13 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." yeah so the only issue I see here is that I may be missing Bremsstrahlung from other materials in that case, as @*Tutor* Ohnishi Seiki pointed out. 22:14:13 発信元: 144 Margarita Tzivaki : [This is an encrypted message] 22:17:21 発信元: 144 Margarita Tzivaki : Ah yes good point, my main objective is though to not miss Bremsstrahlung, but to include it in the least (computationally) expensive way possible because electrons suck the life out of our calculation cluster. So from my understanding, if I used the [counter] section, transport has already happened right? 22:19:37 発信元: *Tutor* Hunter Ratliff : Replying to "I have another quest..." Yep, that is correct. If you already have the spectrum, 100% the least expensive way to transport them is to just include them as a source section on their own / part of a multi-source and then set negs=-1 in [Parameters] to disable electron transport. 22:19:48 発信元: 144 Margarita Tzivaki : Hat auf "Yep, that is corre..." mit 👍 reagiert 22:20:22 発信元: *Tutor* Hunter Ratliff : [Counter] just gives you a way to single out particular events for selective inclusion/exclusion from tally results but otherwise does not influence transport at all. 22:20:49 発信元: 144 Margarita Tzivaki : Hat auf "[Counter] just giv..." mit 👍 reagiert 22:24:13 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." there is no way to exclude certain materials from reactions I take it? (SCALE does only Bremsstrahlung in U). Other than maybe editing the cross section files for Uranium to 0 for the Bremsstrahlung reactions, which seams an extreme measure and is probably a recipe for disaster. 22:25:17 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." In any case, thank you for indulging my curiosity in this super niche problem 22:28:30 発信元: *Tutor* Ohnishi Seiki : Replying to "I have another quest..." Currently, there’s no function to exclude a specific material from a specific reaction during the transport process. The only way is to modify the cross-section file itself. 22:28:41 発信元: 144 Margarita Tzivaki : Hat auf "Currently, there’..." mit 👍 reagiert 22:33:33 発信元: *Tutor* Hunter Ratliff : Replying to "I have another quest..." ahhhhh, that does complicate things. One thought that comes to mind would be doing a dedicated PHITS simulation to score all Bremss production to a dump file via [T-Product] with negs=1, and then in future simulations you could set negs=-1 to disable electron transport again but to insert the scored produced Bremss with a s-type=17 source (read from dump file). Another thought would be to still use [counter] and specify regions to exclude regions composed of U. Of course, this only really works if your U-containing regions don't contain any other nuclides with significant Bremss production contribution. This, however, does not spare you the computational cost of Bremss being produced in the U anyways. Still, this idea could be combined with the [T-Product] dump idea if you wanted to use SCALE-produced U-Bremss + PHITS-produced Bremss for other regions (written to dump file), both reinserted into a negs=-1 simulation. You'd have to take care with normalization on th 22:33:42 発信元: *Tutor* Hunter Ratliff : Replying to "I have another quest..." It is an interesting case :) 22:35:28 発信元: 115 J. Santos : In the output of multiplier exercise 1 I get same result as in the answer but the track_z.eps is like zoomed out, how can I zoom in so I can see it in more detail? 22:35:32 発信元: 264 + Kebede Shogile : Please, do you explain the output! 22:37:26 発信元: 264 + Kebede Shogile : Please, do you explain the output for exercise number 1? 22:37:56 発信元: *Tutor* Hunter Ratliff : @115 J. Santos I'm not entirely sure what you may be seeing, but you can control the bounds of the generated EPS plots using tally angel parameters xmin, xmax, ymin, and ymax. (See PHITS manual section 6.7.11 for full list of ANGEL parameters available in tallies for customizing the EPS plots.) 22:38:57 発信元: 115 J. Santos : Thanks! 22:40:01 発信元: 115 J. Santos : But I meant controling the range of y axis pSv/dose 22:41:21 発信元: *Tutor* Ohnishi Seiki : Replying to "Please, do you expla..." Do you have questions in which part? 22:41:42 発信元: William Asztalos : When using the setting -202 to calculate effective dose, does PHITS automatically take into account the particle which is depositing the energy? the quality factors are different from particle to particle. 22:42:04 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." oh nice, ok, that is a couple of exciting options to consider. I am dealing with spent fuel in transport and strorage casks, so in essence I would like to not miss Bremsstrahlung in the cask, but also want to make sure that the Bremsstrahlung in the fuel is not double counted or ideally not done through MC calculations. I have also considered doing the fuel seperately and then using surface surces. In any case this is mostly a fun little problem, that has very little impact on the actual results :D 22:44:26 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." I will wait for the variance reduction lecture in the hopes that I can optimize my simulation that way, instead of killing reactions 22:44:38 発信元: *Tutor* Ohnishi Seiki : Replying to "When using the setti..." The different multiplier is applied to the different particle when the built-in multipliersi used. 22:44:56 発信元: William Asztalos : Replying to "When using the setti..." Thank you very much, that makes sense and is convenient 22:45:11 発信元: *Tutor* Hunter Ratliff : Yes, it is broken down by particle. You can see these in the phits\data\multiplier directory, with the various multiplier sections for each "number" value per file, if interested to see all the raw data used. 22:48:08 発信元: William Asztalos : Replying to "When using the setti..." Thank you, it is interesting to see how it is stored! 22:49:40 発信元: *Tutor* Hunter Ratliff : Oh, I hadn't even thought about that idea. There are perhaps some interesting things you could do to auto-terminate electrons only in certain regions with an [Importance] section (but, again, by region, not by isotope). 22:53:38 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." well if the team is looking for future developments, turning material- and reaction-specific cross section librarioes off from the input file that would be much appreciated and would open up all kinds of cool stuff 22:54:18 発信元: 144 Margarita Tzivaki : Hat auf "Oh, I hadn't even ..." mit 👍 reagiert 22:54:26 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." Please and thank you :D 22:57:33 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." that being said, just because one can theoretically do something, is probably not necessarily a good idea to actually implement it 22:58:25 発信元: 144 Margarita Tzivaki : Hat auf "Thank you, it is i..." mit 👍 reagiert 23:00:15 発信元: *Tutor* Hunter Ratliff : Replying to "I have another quest..." The [Data Max] section kind of allows this at least for nuclear data library usage. In that section, you can actually just disable reactions of specified particles with specified isotopes/elements in specified materials, but this is for controlling use of data libraries, not models, for specific interactions. 23:01:58 発信元: 052 Dali Georgobiani : Thank you, Ogawa-san!!! 23:02:37 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "Thank you, Ogawa-san..." with 👍 23:03:34 発信元: 138-Le Huu Loi-Main : Thank you so much. It's useful for me, such as calculate for scattering photon 23:03:46 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "Thank you so much. I..." with 👍 23:04:06 発信元: 043 A.Bekouale : Thanks you very much 23:04:49 発信元: wakai : Page 50: it shows the flux mapping. which inp file do we use for the evaluation? 23:07:08 発信元: 144 Margarita Tzivaki : Antworten an "I have another que..." oh interesting! 23:08:13 発信元: *Tutor* SHIGYO Nobuhiro : It is phits.inp in the phits\lecture\advanced\options\counter folder. 23:10:19 発信元: wakai : Replying to "Page 50: it shows th..." Thank you 23:10:39 発信元: Anton Moroz : what is the difference between ctmin and chmin? 23:11:46 発信元: *Tutor* Hunter Ratliff : Replying to "what is the differen..." ctmin refers to the minimum value of the counter at the time of scoring in the tally, chmin is the minimum value of the counter of the whole course of each particle's history. 23:12:14 発信元: Anton Moroz : Reacted to "ctmin refers to the ..." with 🤔 23:14:20 発信元: wakai : When I evaluate the ion projected range in the metal or water, which inp file do it recommend? 23:14:21 発信元: *Tutor* Hunter Ratliff : Replying to "what is the differen..." This is explained a bit in the manual in section 6.7.19, but the "history counter" would be useful in situations where you're interested in knowing the flux of particles that will eventually undergo a certain reaction somewhere but have not yet done so at the time of hitting that tally. 23:14:39 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "what is the differen..." Page 49 of phits-lec-options-en.pptx is useful to have deeper understanding of difference between chmin and ctmin 23:15:39 発信元: Anton Moroz : Reacted to "Page 49 of phits-lec..." with 👍🏼 23:15:43 発信元: Anton Moroz : Reacted to "This is explained a ..." with 👍🏼 23:16:31 発信元: *Tutor* SHIGYO Nobuhiro : Replying to "When I evaluate the ..." What about the input files in phits\lecture\exercise\range? 23:16:36 発信元: *Tutor* Tatsu Sato : Replying to "When I evaluate the ..." recommendation/ParticleTherapy is the best sample file for your purpose because it includes parameters necessary for the precise range calculation such as nspred and nedisp 23:17:27 発信元: Anton Moroz : Replying to "what is the differen..." so with chmin I can score a particle in tally A even if its counter will only become = ctmin after passing the detector A? 23:18:14 発信元: 138-Le Huu Loi-Main : Im going to simulate detector NaI and Geiger Muller Tube. On the Friday, I don't know you have plan for that in detector lecture? 23:19:37 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "Im going to simulate..." Detector exercise containts simulation of scintillator (like NaI) but simulation of Geiger Muller is not within the scope of the lecture. 23:20:39 発信元: *Tutor* Hunter Ratliff : Replying to "what is the differen..." That is right. The illustration on page 49 of the last lecture that Ogawa-san pointed to has a nice visualization of this. The "history counter" evaluates if the counter criteria are ever satisfied over the whole course of a history, not solely at the time of initial scoring in a tally. 23:20:57 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "Im going to simulate..." The material is here \phits\lecture\advanced\detector If you have any questions on detector simulation, don't hesitate to ask us after the course. 23:21:04 発信元: Anton Moroz : Replying to "what is the differen..." thanks a lot 23:21:05 発信元: wakai : Replying to "When I evaluate the ..." Thank you very much! There is another question related this. How do we get the related transmutation atom concentrations as the depth profile? 23:21:06 発信元: 138-Le Huu Loi-Main : Replying to "Im going to simulate..." Thank for your useful information!!! Im going carefull studying it. 23:21:11 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "Thank for your usefu..." with 👍 23:21:31 発信元: 138-Le Huu Loi-Main : Reacted to "Detector exercise co..." with 👍 23:21:42 発信元: 138-Le Huu Loi-Main : Reacted to "The material is here..." with 👍 23:23:24 発信元: 257 Ranulfo da Silva Dias : Would the spectrum of the Am_Be 241 source be of the type e = 21? 23:24:40 発信元: *Tutor* SHIGYO Nobuhiro : Replying to "When I evaluate the ..." By setting the axis to z in the T-Product or T-Yield tally, the distribution of nuclide production in the z direction can be obtained. 23:25:39 発信元: wakai : Replying to "When I evaluate the ..." Thank you very much. I will check/try it. 23:26:47 発信元: *Tutor* SHIGYO Nobuhiro : Replying to "Would the spectrum o..." See phits\sample\source\NeutronSource\AmBe. 23:26:54 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "Would the spectrum o..." To simulate AmBe source, you have 2 options. Simple one using e-type =1 is \phits\sample\source\NeutronSource\AmBe High precision, high flexibility model is C:\phits\sample\source\NeutronSource\Precise-model\AmBe 23:27:58 発信元: 257 Ranulfo da Silva Dias : Replying to "Would the spectrum..." Thank you! 23:28:10 発信元: 257 Ranulfo da Silva Dias : Reacted to "To simulate AmBe s..." with ❤️ 23:28:12 発信元: 257 Ranulfo da Silva Dias : Reacted to "See phits\sample\s..." with ❤️ 23:28:16 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "Thank you!" with 👍 23:31:03 発信元: 094 G. Franklin : Is it possible to define a source in totfact for a volume function? (ex. a cylinder instead of a circular area) 23:33:04 発信元: *Tutor* SHIGYO Nobuhiro : Replying to "Is it possible to de..." You can create a cylindrical source by using s-type = 1. totfact is a parameter that sets the source strength. 23:34:36 発信元: Anton Moroz : what is the difference between totfact and factor in the source section? why do you need both? 23:34:46 発信元: 028 Amiegbereta Edwin Ehis : please where can I get the current lecture material? 23:35:02 発信元: *Tutor* Hunter Ratliff : Replying to "please where can I g..." \phits\lecture\advanced\variance-reduction 23:35:35 発信元: 028 Amiegbereta Edwin Ehis : Replying to "please where can I g..." thanks 23:35:43 発信元: 264 + Kebede Shogile : How we can find the right totfact in the simulation of GCR source? 23:35:50 発信元: *Tutor* Ohnishi Seiki : Replying to "Is it possible to de..." If you use variables to define the source, the totfact can be set programatically. For example set:c1[10] c2[1], and totfac = c1*pi*c2*c2, and r1 = c2. 23:35:51 発信元: 257 Ranulfo da Silva Dias : I have a question about this: my geometries always appear as “Double defined.” Even when I subtract, it remains black. Is this a subtraction error or a geometry adjustment? For example: [Surface] 10 rpp -750. 750. -750. 750. -750. 750. $World 11 rpp -500. 500. -500. 500. -400. -100.00 $Soil 12 rpp -500. 500. -500. 500. -99.8 0. $Concrete [ C e l l ] 99 -1 10 100 15 -0.001225 -10 107 1 -8.93 -11 108 2 -8.93 -12 11 23:36:07 発信元: *Tutor* Hunter Ratliff : Replying to "please where can I g..." the source subfolder is where we started 23:36:11 発信元: 094 G. Franklin : Replying to "Is it possible to de..." how would totfact be adjusted for a cylindrical source? is this method accurate for modeling cosmic rays outside of the cylinder? 23:39:46 発信元: *Tutor* Tatsu Sato : Replying to "Is it possible to de..." For cosmic-ray source, totfact is generally set to the source area. I will explain in more detail during cosmicray lecture on Friday. 23:39:53 発信元: 110 I. Casalbore : If particles are born within a region in which the importance is defined, are they immediately subjected to the splitting/russian roulette or not? 23:40:02 発信元: *Tutor* Yuho Hirata : Replying to "what is the differen..." When setting a single source, you can use “factor”. In this case, factor and totfact function identically (the result is multiplied by totfact*factor). When setting multiple sources, you must use “totfact”. 23:40:14 発信元: 264 + Kebede Shogile : Replying to "Is it possible to de..." Great! Thank you! 23:40:38 発信元: *Tutor* Yusuke Matsuya : Replying to "what is the differen..." In addition, totfact renormalizes all calculation results. factor renormalizes each tally result. 23:41:08 発信元: 094 G. Franklin : Replying to "Is it possible to de..." Thank you! 23:41:10 発信元: *Tutor* Tatsu Sato : Replying to "If particles are bor..." when you use [importance], it is not because only relative importances between the neighboring cells are important. 23:41:20 発信元: 126 J.Omojola : In a cosmic ray simulation if we define the totfact as -pi*c1**2 do we also multiply this factor with the calculated absorbed dose to get the actual value? 23:41:28 発信元: Anton Moroz : Replying to "what is the differen..." so in a sense in source section, factor option is redundant? we can always use totfact 23:41:38 発信元: 110 I. Casalbore : Reacted to "what is the differen..." with 👍 23:41:39 発信元: 110 I. Casalbore : Removed a 👍 reaction from "what is the differen..." 23:41:41 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "I have a question ab..." Cell section is wrong. You must define like below [ C e l l ] 99 -1 10 100 15 -0.001225 -10 12 11 107 1 -8.93 -11 108 2 -8.93 -12 23:41:50 発信元: 110 I. Casalbore : Reacted to "when you use [import..." with 👍 23:41:57 発信元: *Tutor* Tatsu Sato : Replying to "If particles are bor..." If you use [weight window], the answer to your question is yes. You will learn [weight window] tomorrow 23:42:15 発信元: Anton Moroz : Reacted to "In addition, totfact..." with 👍🏼 23:42:20 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "I have a question ab..." Otherwise, cell 100 overlaps with 107 and 108 23:42:53 発信元: 110 I. Casalbore : Replying to "If particles are bor..." Thank you very much, I was indeed asking this question because I have used both and observed this difference but I was not sure of the reason 23:43:53 発信元: 257 Ranulfo da Silva Dias : Reacted to "Cell section is wr..." with ❤️ 23:43:59 発信元: 257 Ranulfo da Silva Dias : Reacted to "Otherwise, cell 10..." with ❤️ 23:44:12 発信元: 257 Ranulfo da Silva Dias : Replying to "I have a question ..." Thank you! 23:45:04 発信元: 144 Margarita Tzivaki : Hat auf "If particles are b..." mit 👍 reagiert 23:46:58 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "Thank you!" with 👍 23:47:38 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "thanks a lot" with 👍 23:49:23 発信元: 144 Margarita Tzivaki : When I first learned how to do importances, the guidance was to look at the absorption coefficient of the material and the thickness of the slice an then set the importance in a way that you get the same number of particles going in as going out. Is this guidance still applicable or is there a better way of figuring this out now/in phits? 23:50:38 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "How we can find the ..." When you use cosmic ray function, the intensity is automatically adjusted. 23:51:16 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "How we can find the ..." Good examples are in \phits\lecture\advanced\cosmicray and they are going to be covered on Friday. 23:51:18 発信元: *Tutor* Ohnishi Seiki : Replying to "When I first learned..." Basically yes. To keep the particle population uniform is a good stradegy in variance reduction. 23:51:27 発信元: 144 Margarita Tzivaki : Antworten an "When I first learn..." follow-up question: there is a (ruby) script in mcnp that will calculate appropriate importances for relatively simple geometries from an output file. Is there something comparable for phits? 23:51:36 発信元: 144 Margarita Tzivaki : Hat auf "Basically yes. To ..." mit 👍 reagiert 23:51:46 発信元: 126 J.Omojola : In a cosmic ray simulation if we define the totfact as -pi*c1**2 do we also multiply this factor with the calculated absorbed dose (Gy/source) to get the total dose? 23:52:08 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "In a cosmic ray simu..." When you use cosmic ray function, the intensity is automatically adjusted. Good examples are in \phits\lecture\advanced\cosmicray and they are going to be covered on Friday. 23:53:00 発信元: *Tutor* SHIGYO Nobuhiro : Replying to "In a cosmic ray simu..." By using totfact = pi*c1**2, the tally unit becomes 1/cm2/sec, so you can get the absorbed dose per second. 23:53:14 発信元: *Tutor* Ohnishi Seiki : Replying to "When I first learned..." I'm sorry that there is no such a simle script. You can use Weight Window Generator instead. 23:53:24 発信元: 144 Margarita Tzivaki : Hat auf "I'm sorry that the..." mit 👍 reagiert 23:53:50 発信元: *Tutor* Tatsuhiko OGAWA : Reacted to "By using totfact = p..." with 👍 23:55:41 発信元: 144 Margarita Tzivaki : Antworten an "When I first learn..." do you have any guidance on how to set up slice thicknesses in shielding problems? Would it make sense to use half-value-layer information? Or maybe something else? 23:56:38 発信元: 126 J.Omojola : Reacted to "By using totfact = p..." with 👍 23:56:48 発信元: 126 J.Omojola : Reacted to "When you use cosmic ..." with 👍 23:58:13 発信元: *Tutor* Ohnishi Seiki : Replying to "When I first learned..." There is no golden rule. However, generally the thickness about mean-free-path is suitable because it corresponds to the characteristic length of flux attenuation. 23:59:10 発信元: 144 Margarita Tzivaki : Antworten an "When I first learn..." ah yes! that makes sense! thank you 00:00:05 発信元: 264 + Kebede Shogile : Reacted to "By using totfact = p..." with 👍 00:00:08 発信元: *Tutor* Ohnishi Seiki : Replying to "When I first learned..." In short, the importance should be set with a resolution fine enough to follow the decreasing trend of the flux. If you want to set it in a more mechanical way, the mean free path can be used as a good reference. 00:01:27 発信元: *Tutor* Yuho Hirata : Replying to "what is the differen..." We have been thinking about that, and the answer is probably yes. In any case, it's better to use totfact unless there's a specific reason not to. 00:03:07 発信元: 144 Margarita Tzivaki : Hat auf "In short, the impo..." mit ❤️ reagiert 00:05:34 発信元: 144 Margarita Tzivaki : Antworten an "When I first learn..." so the process would be to set first the slice thickness based on the flux decrease (or the mean free path) an then look at the absorption coefficients to kind of make sure that the flux at the slice boundaries is approximately kept constant yes? 00:08:01 発信元: *Tutor* Tatsuhiko OGAWA : Replying to "When I first learned..." You are right. Practically, you don't have to slice cells because we encourange to use weight window function alternative to importance 00:08:06 発信元: 052 Dali Georgobiani : Thank you very much!!! 00:08:30 発信元: 144 Margarita Tzivaki : Antworten an "When I first learn..." I am looking forward to tomorrow then! 00:08:35 発信元: 210 Takoukam Serge : Thank you very much 00:08:38 発信元: 252Friouli Fatima : Thank you 00:08:39 発信元: 047-Chalit Muanglay-(Sub) : Thank you very much. 00:08:46 発信元: *Tutor* Tatsuhiko OGAWA : Group photo is available at https://phits.jaea.go.jp/tutorial/2025-11/group-photo.mp4 1.Please answer a survey by Friday from here https://forms.gle/htPwzn7eSbFMKoAr5 2.Tutorial videos and chats are available from http://phits.jaea.go.jp/tutorial/rec.html 00:09:02 発信元: 020 A.Moreno : Thank you!! 00:09:03 発信元: 129 - K.Butalag Main : Thank you very much. See you tomorrow! 00:09:04 発信元: 138-Le Huu Loi-Main : Thank you very much!!! 00:09:15 発信元: 099hyoriyaz : thank you ! 00:09:15 発信元: 043 A.Bekouale : Thanks you very much 00:09:29 発信元: 114 Gordeev Main : Thank you very much! 00:10:01 発信元: abdall01 : Thank you 00:10:08 発信元: 014 ahid nurmanjaya : Arigatou gozaimasu 00:10:13 発信元: 100 Herlan Setiawan : thank you so much.. 00:10:19 発信元: 106 Iaroslav Bielov : thank you! See you tomorrow! 00:10:20 発信元: Majid Kh : Thank you 00:10:24 発信元: 240 Youngran Kwon : Thank you See you tomorrow. 00:10:30 発信元: 117_JCLee : Thank you 00:10:32 発信元: 144 Margarita Tzivaki : thank you ❤️ 00:10:32 発信元: 251Kayo : Thank very much 00:10:37 発信元: 171 N. Stoffle : For counter, setting in to 1 and out to 1 in the definition, and then setting ctmin(1)=1 and ctmax(1)=1 will not count particles stopping in the associated region - am I understanding that correctly? 00:10:43 発信元: 178 Nur Aida : Thank you Sensei 00:10:47 発信元: 160 M. Adithya P : thank you