PHITS - Particle and Heavy Ion Transport code System
Lembit Sihver
Chalmers University of Technology, Sweden
University of Houston, Houston, TX, USA
Texas A&M University, TX, USA
Roanoke College, VA, USA
Practical Physics Solutions, LLC, TX, USA
Medical College of Soochow University, Suzhou, China
Nuclear
Power/Accelerators
Design of Shielding
Chalmers
Chalmers
Heavy Ion Therapy
Space Dosimetry
Treatment Planning
System
Dose in the atmosphere,
ISS and deep space
Nuclear Science and Engineering
Nuclear Science and Engineering Research Group
Main Research Areas
 Fuel and Control Rod Integrity Management for LWR
 Reactions & transport of ionizing particles
 Radiation therapy
 Shielding calculations
 Dosimetry in space
 Dose estimations at aviation altitudes
 Development of particle & heavy ion transport codes
Chalmers
Chalmers
Nuclear Science and Engineering
Particle and Heavy Ion Transport code System
PHITS
Development
Dr. Niita of RIST (Japan)
JAEA (Japan), KEK (Japan), Chalmers Univ. Tech. (Sweden)
Capability
Transport and collision of “all” particles with wide energy range
in 3D phase space with
magnetic field & gravity
neutron, proton, meson, baryon
electron photon, nucleus
from thermal up to
~ 200 GeV/u
Application Fields
Accelerator Design
Chalmers
Chalmers
Radiation Therapy
Space Application
Nuclear Science and Engineering
3
Particle and Heavy Ion Transport code System
PHITS
The best with PHITS is
JAEA & RIST
(same site)
Chalmers
KEK University of
Technology
Very Nice and
Friendly Developers!!
Capability
Transport and collision of “all” particles with wide energy range
in 3D phase space with
magnetic field & gravity
Koji
Niita
Chalmers
Chalmers
Norihiro
Matsuda
neutron, proton, meson, baryon
electron, photon, nucleus
Yosuke Hiroshi
Iwamoto Iwase
from thermal up to
~ 200 GeV/u
Tatsuhiko Hiroshi
Yukio
Lembit
Nuclear
Science
and Engineering
Sato
Nakashima
Sakamoto
Sihver
User Interfaces of PHITS
 Input file
Free format with user defined variables and formula
You do not have to change the source files of PHITS !
 Geometry
GG or CG
2D and 3D viewers
(ANGEL)
SimpleGEO*
2D viewer
SimpleGEO
3D viewer
 Tally functions
Track length, Heat, Yield, DPA, Production, LET distribution etc.
 Output Data
Text data, histograms, contour maps
 Platforms
Windows (JAVA application) and Linux (Console)
* GUI-based software originally for FLUKA, http://theis.web.cern.ch/theis/simplegeo/
Nuclear Science and Engineering
Chalmers
Chalmers
Map of Models Used in PHITS
Neutron
Other hadrons
（proton, p etc.）
Low ← Energy → High
200 GeV
100 GeV/n
Intra-Nuclear
Cascade model: JAM
(or Bertini, JQMD)
+
Evaporation & Fission: GEM
20 MeV
Nuclear
data library
JENDL-4.0
Nucleus
1 MeV
1 keV
10-4 eV
Quantum
Molecular
Dynamics:
JQMD
+
Evaporation
GEM
10 MeV/n
Ionization
SPAR or ATIMA
Muon
Electron
Positron
Photon
GeV
FUTURE 100
PLAN
EGS5 and
Photohigh-energy
atomic
1 GeV
photo-nuclear
data
reaction model
library
Electroatomic
20 MeV
data
library
Photo(option)
nuclear
1 keV
1 keV
Microdosimetric function
Event generator mode:
determine all the ejectiles emitted from neutron interactions event by event
Nuclear Science and Engineering
Chalmers
Chalmers
6
Shielding of all Beam Lines at J-PARC
Japan Proton Accelerator Research Complex
Materials and Life Science
Experimental Facility
Nuclear and Particle Physics
Experimental Facility
Nuclear
Transmutation
Neutrino to Kamiokande
50 GeV Synchrotron
(0.75 MW)
Linac(350m)
3 GeV Synchrotron
(25 Hz, 1MW)
Constructed under joint project of JAEANuclear
and KEK
in Tokai-mura
Science
and Engineering
Chalmers
Chalmers
8
Shielding Design around Neutron Beam Line
Heat distribution calculated by PHITS
32 neutron beam lines in material and life science facility
Duct source option
• Source generation program specialized for shielding design of long beam lines
• “Weight” of each source particle is automatically adjusted
• obtain good statistics within reasonable computational time in whole area
Chalmers
Chalmers
Nuclear Science and Engineering
Shielding Design around Spallation Target
Deposition
ttEnergy
== 201000
410nsec
100
nsec
nsec
nsec
9
Be reflector
Fe reflector
Moderators
Proton
Hg target
Proton window
Moderators
Neutron window
Hg target
Neutron window
Estimation of Heat around target
Chalmers
Chalmers
M. Harada et al. J. Nucl. Material 343, 197 (2005)
Geometry around Hg target
Nuclear Science and Engineering
What can Sihver contribute with for the ESS project WP#3 and 11
 Nearly 30 years of experiences with nuclear chemistry, nuclear physics,
material science and various applications of these sciences.
 Long experience of gamma spectroscopy, heavy ion experiments, gamma
spectroscopic analysis of accelerator based fragmentation experiments,
and development of gamma spectroscopic measurements systems.
 PhD thesis at the department of neutron research, Uppsala University.
 20 years of experiences of development, improvements and benchmarking
of deterministic and Monte Carlo particle and heavy ion transport codes.
 A extremely wide network and collaborations with Japanese scientists at
JAEA, NIRS, University of Tokyo, Tokyo Institute of Technology, Waseda
University., JAXA, RIKEN, etc.
 A passionate interest for the construction of ESS and all possible experiments
which can be performed at ESS.
Chalmers
Chalmers
Nuclear Science and Engineering