PHITS user's manual and lecture notes
User's Manual
The latest version of the manual is 3.24
[ 3.24 ] 2021/03/26
Manual is also updated in order to be suit for PHITS3.24

(Old revisions)
[ 3.20 ] 2020/04/09
[ 3.17 ] 2019/10/31
[ 3.10 ] 2019/04/09
[ 3.02 ] 2017/12/05
[ 2.88 ] 2016/09/30
[ 2.82 ] 2015/12/24
[ 2.76 ] 2015/03/20
[ 2.64 ] 2014/02/19
[ 2.52 ] 2013/03/05
[ 2.30a ] 2011/12/02
[ 2.30 ] 2011/08/18
[ 2.23 ] 2010/10/04
Lecture notes
Each file
Download zip file (including sample input files)
Operation environment
Recommended PC environment
OS: Windows (XP or higher), Mac (OS X v10.6 or higher), Linux or Unix
System memory: 1 GB or larger (more than 2 GB is recommended)
Hard disk: 6 GB or larger
Required Software: Editor that can show the line number
Examples of recommended editor
TeraPad (in Japanese)
Notepad++ (in English)
mi (for Mac, in Japanese)

EPS viewers such as ghostscript & GSview are required to show graphical output files calculated by PHITS.
Examples of download site of ghostscript for Windows: here

About compiling
PHITS is a Fortran program for particle transport simulation based on Monte Carlo method. We prepared installer of PHITS, so you do not have to compile PHITS by yourself. On the other hand, re-compile of PHITS is required to extend memory used in PHITS calculations and define your own source using the usrsors.f file. Fortran compiler is required to compile PHITS.

Recommended compiler
Recommended Fortran compilers are Intel Fortran 11.1 (or later) and gfortran (4.8, 7 or later). The best recommended compiler is Intel Fortran because PHITS compiled by Intel Fortran is much faster than that by gfortran. If you are student, you can obtain Intel Fortran for free. (detail)

For instlation of gfortran in Windows, please see details. Note that OpenMP is not available to compile PHITS with gfortran. Although the possibility that compilation and execution of PHITS with other compilers will fail is high, there are some successful cases with compilers such as PGI Fortran and Fujitsu Fortran.