title
DESCRIPTION
Koji Niita: RIST, Japan Hiroshi Iwase: GSI, Germany Tatsuhiko Sato, JAEA, Japan Yousuke Iwamoto, Norihito Matsuda, Yukio Sakamoto, Hiroshi Nakashima: JAEA, Japan Davide Mancusi, Lembit Sihver: Chalmers, Sweden. Title. P HI T S. - PowerPoint PPT PresentationTRANSCRIPT
Title
Koji Niita: RIST, Japan
Hiroshi Iwase: GSI, Germany
Tatsuhiko Sato, JAEA, Japan
Yousuke Iwamoto, Norihito Matsuda,Yukio Sakamoto, Hiroshi Nakashima: JAEA, Japan
Davide Mancusi, Lembit Sihver: Chalmers, Sweden
PHITSMulti-Purpose Particle and Heavy Ion Transport code System
Overview (1)
1951 1983 1997 2001 2003NMTC NMTC/JAERI NMTC/JAERI97 NMTC/JAM PHITS(ORNL) High Energy Fission CG geometry JAM, GG JQMD, MCNP Magnetic Field Gravity
PHITS = MCNP + JAM + JQMD
Nucleus-Nucleus Collisionsby Molecular Dynamics
JQMD
Hadron-Nucleus Collisionsup to 200 GeV
JAM
Neutron, Photon, ElectronTransport by Nuclear Data
MCNP0 ~ 200 GeV10-5 eV ~ 200 GeV0 ~ 200 GeV0 ~ 200 GeV0 ~ 100 GeV/u1 keV ~ 1 GeV1 keV ~ 1 GeV
ProtonNeutronMesonBarionNucleusPhotonElectron
Transport Particle and Energy
Language and Parallelism
FORTRAN 77MPI
Overview of PHITS (Particle and Heavy Ion Transport code System) (1)Overview of PHITS (Particle and Heavy Ion Transport code System) (1)
Tally, Mesh and GraphicTally: Track, Cross, Heat, Star, Time, DPA, Product, LETMesh: cell, r-z, xyzCounter: Graphic: ANGEL (PS generator)
Geometry: CG and GGExternal Field: Magnetic Field, Gravity Optical and Mechanical devices
neutrons protons hadrons,..,,, K
nucleus photonselectrons
JQMD
JAM, Hadron cascade model
In progress
only transport with dE/dx (SPAR, ATIMA)
200 GeV 200 GeV 200 GeV100 GeV/u 100 GeV
1 GeV
1 keV
10 MeV/u1 MeV1 MeV
20 MeV
(JQMD)(Bertini)
(JQMD)(Bertini)
(JQMD)
thermal 0 MeV 0 MeV 0 MeV/u
GEM, Evaporation process
SPAR, ATIMA, Ionization process
MCNPwith
nuclear data
MCNPwith
nuclear data
Overview of PHITS (Particle and Heavy Ion Transport code System) (2)Overview of PHITS (Particle and Heavy Ion Transport code System) (2)
Event Generator
Introducing JAM (Jet AA Microscopic Transport Model) Y. Nara et.al. Phys. Rev. C61 (2000) 024901JAM is a Hadronic Cascade Model, which explicitly treats all established hadronic states including resonances with explicit spin and isospin as well as their anti-particles.We have parameterized all Hadron-Hadron Cross Sections, based on Resonance Model and String Model by fitting the available experimental data.
JAM code for Hadron Nucleus Collisions up to 200 GeV JAM code for Hadron Nucleus Collisions up to 200 GeV
JAM
Au+Au 200GeV/u in cm
DDX of elementary process, p(12GeV/c) + p , by JAMDDX of elementary process, p(12GeV/c) + p , by JAM
rapidity distribution transverse momentum distribution
Data : Nucl. Phys. B69 (1974) 454
JAM: Y. Nara et.al. Phys. Rev. C61 (2000) 024901
JAM (1)
JQMD (Jaeri Quantum Molecular Dynamics) for Simulation of Nucleus-Nucleus Collisions
JQMD code for Nucleus-Nucleus Collisions up to 100 GeV/u JQMD code for Nucleus-Nucleus Collisions up to 100 GeV/u
56Fe 800 MeV/u on 208Pb
JQMD-1
K. Niiita et.al. Phys. Rev. C52 (1995) 2620 http://hadron31.tokai.jaeri.go.jp/jqmd/
Analysis of Nucleus-Nucleus Collisions by JQMD
Introducing JQMD in PHITS : H. Iwase et.al. J. Nucl. Sci.Technol. 39 (2002) 1142
Results of PHITS
JQMD-2
Neutron Spectra from Thick Target
JQMD code in PHITS JQMD code in PHITS
New Feature (1)
Event Generator Mode of PHITS Event Generator Mode of PHITS
What are we doing in Monte Carlo calculations for particle transport ? Solving one-body Boltzmann equation by using the evaluated nuclear data.
Simulating real phenomena by using event generators.
MCNP type code
PHITS for high energy by JAM, JQMD.
energy is conserved in average.no correlations
treat all ejectiles of collisions.energy and momentum are conservedin each collision.
Only one-body observables
Any observables
Observables beyond one-body quantities are often required.Deposit energy distribution in a cell (pulse height tally). LET distribution in a micro dosimetry, Coincident experiments, ………
Event Generator
New Feature (2)
0n
0n
Event Generator Mode for low energy neutrons in PHITS Event Generator Mode for low energy neutrons in PHITS
We use the channel cross sections and neutron energy spectrumof the first neutron and assume the binary decay of recoiled nucleus.
Neutronchannels
capture
elastic
(n,n’)
(n,Nn’)
charged particle and photon decay
final state is uniquely determined
0n
charged particle and photon decayafter the first neutron emission
all particle and photon decay after the first neutron emission
By this model, we can determine all ejectiles (neutrons, charged particles, nucleus and photons) with keeping energy and momentum conservation.
PHITS can transport all charged particle and nucleus down to zero energyand estimate deposit energy without local approximation (kerma factor).
Neutron data + Special Evaporation Model
Event Generator Mode (2)
Neutron-induced semiconductor soft error (SEU: single event upset)
m3
Neutron 19 MeV
Si
Leakage ofrecoil nucleusfrom Si
Deposit Energy Distribution by PHITS
An example of Event Generator Mode An example of Event Generator Mode
Kerma
AGS
AGS Benchmark Experiments for Spallation Neutron SourceAGS Benchmark Experiments for Spallation Neutron Source
Heat
Benchmark test of HEAT : compared with KEK experiment Benchmark test of HEAT : compared with KEK experiment
SEC
movable target (Cu)0.2 interaction length
Absorber
GM cryocooler
thermal shuntCryogenic Calorimeter
beam dump
(Cu foil)
Beam monitors
Primaryprotons
pure Al strip
SPIC
Target
Primary
Protons
Inner AbsorberOuter Absorber
Exp. and Cal. by H. Ohnishi et.al.Nucl. Instr. and Meth. A545 (2005) 88
12 GeV
MCNPX: calculated by N. Matsuda
90 degree
forward
backward
DDX of Secondary Particles DDX of Secondary Particles
100 101 102 103 104 10510-15
10-14
10-13
10-12
10-11
10-10
10-9
10-8
10-7
10-6
10-5
Neutron Energy (MeV)
Neut
ron
flux
(cm
-2 p
roto
n-1 p
er l
eth
arg
y)
Ep=12GeV Cu:1mmt
4°
45°
90°
120°
MCNPX
PHITS
Space Radiation
CREME96+
PHITS with JENDL-HEfile10–8 10–4 100 1040
0.0005
0.001
0.0015
0
0.5
1
1.5 d = 101 g/cm2 (~16.0 km)rc = 0.7 GVsmin
Exp. (Goldhagen et al.)
Simulation
Analytical Function
0
0.2
0.4
d = 201 g/cm2 (~11.8km)rc = 4.3 GVsmin
Neutron Energy (MeV)
Neu
tron
Flu
x (c
m–
2 s–1 le
thar
gy–
1 )d = 1030 g/cm2 (ground level)rc = 2.7 GVsmin
Neutron spectrum in atmosphere Neutron spectrum in atmosphere
T. Sato and K. Niita; Radiat. Res. 166 (2006) 544
by T. Sato EXPACS : Excel-based Program for calculating Atmospheric Cosmic-ray Spectrum
EXPACS : Excel-based Program for calculating Atmospheric Cosmic-ray Spectrum
New Features of PHITS (Recent Developments, released by ver.2.12)New Features of PHITS (Recent Developments, released by ver.2.12)
(1) Duct Source option for Neutron Long Beam Line calculations
(2) Super Mirror function for Neutron Optics: reflection on the wall
(3) Time Dependent Materials for moving material, T0 chopper, …
(4) Time Dependent Magnetic Fields Pulse Magnet for neutron optics, Wobbler Magnet (AC magnet)
(5) Dumpall option for re-calculation of whole process (history tape)
New Features
(6) Event Generator Mode a full correlated transport for all particles and energies
(7) LET tally dose and track length as a function of LET (dE/dx)
(8) Deposit2 tally correlation of the deposit energy distribution of two regions
(9) Timer (clock of particle) simulation of TOF with dE correlation
[email protected]. Code Center: http://www.rist.or.jp
PHITS ver.2.13 and ANGEL ver.4.35have been released from JAEA.
[email protected]. Code Center: http://www.rist.or.jp
PHITS ver.2.13 and ANGEL ver.4.35have been released from JAEA.
[email protected]. Code Center: http://www.rist.or.jp
PHITS ver.2.13 and ANGEL ver.4.35have been released from JAEA.
[email protected]. Code Center: http://www.rist.or.jp
PHITS ver.2.13 and ANGEL ver.4.35have been released from JAEA.
Distribution of PHITSDistribution of PHITS
distribution