1

Features of PHITS3.10

PHITS development team, Mar. 2019

2

IonizationATIMA

Neutron Proton, Pion(other hadrons) Nucleus e- / e+Muon

EGS5

Photon

1 TeV 1 TeV/u

1 keV

1 TeV

1 keV 1 keV

Photo-Nuclear

JAM/JQMD

+GEM

+JENDL

+NRF

Low

←

E

nerg

y →

H

igh

Intra-nuclear cascade (JAM)+ Evaporation (GEM)

Nuclear Data Library(JENDL-4.0)

+EGM

20 MeV

0.01 meV

1 MeV

3.0 GeV

Intra-nuclear cascade (INCL4.6)+

Evaporation (GEM)

d

t

3He

α

Map of Models Recommended to Use in PHITS

Virtual Photo-Nuclear

JAM/JQMD

+GEM

200 MeV

EPDL97or

EGS5

**Track

1 meV*Only in waterstructure

QuantumMolecularDynamics(JQMD)+ GEM

10 MeV/u

JAMQMD+ GEM

Muonicatom + Capture

ATIMA+

Original

Neutrino with energy below 20 MeV can cause interaction with 1H, 2H, and electron, though it is not written in this map

3

PHITS 3.08 was distributed only through PHITS tutorial

JAMQMD2 is developed for high-energy nucleus-nucleus interaction Neutrino interaction model is developed & implemented [weight window] & [t-wwg] become applicable to xyz-mesh Emission of Auger electrons, internal conversion electrons, & characteristic

X-rays can be considered in the RI source function Several types of dose conversion coefficients are implemented Source generation function in tetrahedral mesh is developed Tetrahedral geometry created by CAD become readable in PHITS Neutron and γ-ray emissions are considered at once in GEM Detector response can be calculated even when [forced collisions] is used Probability density of the number of interactions per history can be

calculated using [t-interact] (former [t-star]) Several activation cross section data libraries used for [t-yield] and [t-

dchain] are implemented [t-heat] is merged into [t-deposit] PHITS executable file in MPI version for Windows is implemented

Upgraded Points from v3.02

Major Upgraded Features in v3.08

4

Nucleus-nucleus interaction model for 3 GeV/n ~ 1 TeV/n

Development of JAMQMD version 2

Useful for cosmic-ray and high-energy physics simulations100GeV/n 12C

μ, γ

ν

n

10km

Airshower simulation

Improve the accuracy of fragment yields Automatically used for nucleus-nucleus interaction above 3GeV/n

*T.Ogawa et al., Phys. Rev. C., 98, 024611 (2018)

Cross section of 14.6AGeV 28Si(27Al,x)

0

40

80

120

160

200

8 9 10 11 12 13

Exp (実測)jamqmd Ver1ktuy

断面積

(mb)

実験値 (Cecchini et al. 1993)JAMQMD Ver.1 ＋GEMJAMQMD Ver. 2 ＋GEM

生成核原子番号

精度改善

200

160

120

80

40

08 9 10 11 12 13

Exp.

Improved

Atomic number of residual nuclei

Cro

ss s

ectio

n

5

*Applicable to neutrino interaction with 1H, 2H or e-

Development of Neutrino Interaction Model

Neutrino can penetrate nuclear reactor

Energy distribution of secondary particles produced by 2H(νe,X)

Consider only when ntrnore is set to 1 (D=0) in [parameter] Recommend to use this option in combination with [Forced Collisions] Interaction with heavier target & neutrino oscillation are under consideration

*Some functions are available only after version 3.10

2H disintegration

νe →e+

conversion

e (ν, ν’) e’scattering

6

xyz-mesh for [weight window] & [t-wwg]

Statistical uncertainties of [t-track] obtained using [t-wwg] with reg (left) and xyz (right) meshes. Cells are divided only to the vertical direction.

(see lecture/advanced/weight in more detail)

You do not have to divide a cell into many pieces for defining different weight windows

mesh = reg mesh = xyzFew particles can reach lateral edges because cells are divided only to the vertical direction

7

Procedure for coupling PHITS with thermal analysis software such as ANSYS Fluent is established

Sample files for using JENDL-4.0/HE are provided Function to read magnetic field maps written in xyz or r-z grid is developed [t-dchain] has become applicable to xyz-mesh Error and warning ID numbers are introduced for some messages Accuracy of electron track-structure mode is improved Detector resolution in any form given by user-defined function can be considered INC-ELF, an intra-nuclear cascade model developed in Kyushu Univ., is improved A new gshow option is introduced to visualize tetrahedral and voxel geometries Time for reading lattice structure is reduced by introducing compressed format Function to calculate water-equivalent dose is implemented in [t-deposit] Remaining batch number has become adjustable using batch.out

PHITS 3.10 is distributed since April 2019

Major Upgraded Features in v3.10

Upgraded Points from v3.08

8

TemperatureTetra-mesh geom.

NASTRANbulk data

format

Fluent PHITS

OpenFOAMField data

format

Fluent

Deposition energy

Create geometry in thermal analysis code such as ANSYS Fluent Meshing to tetrahedral mesh => Output in NASTRAN bulk data format Import => PHITS radiation transport => Output in OpenFOAM field data Import => Thermal analysis by ANSYS Fluent

Read & write in general tetrahedral mesh geometry are possibleand thus seamless coupling to other physics becomes possible

Coupling with thermal analysis

Proton beam

Sample files for using JENDL-4.0/HE

S. Kunieda et al., JAEA-Conf 2016-004 (2016), https://wwwndc.jaea.go.jp/ftpnd/jendl/jendl40he.html

DDX of 9Be(p,n) reaction calculated by PHITS using JENDL-4.0/HE or INCL

What is JENDL-4.0/HE? High-energy nuclear data library for neutrons and protons up to 200 MeV Precisely reproduce the DDX of nuclear reactions particularly for lighter targets Data for neutrons below 20 MeV are the same as JENDL-4.0

0 4 810−2

100

102

Emitted Neutron Energy (MeV)

DD

X (m

b/sr

/MeV

)

Exp. (Iwamoto et al.)JENDL−4.0/HEINCL

9Be(p,n) for Ep = 9.7 MeV at 15 degImportant notice!

Data for only several elements are included in the PHITS package. Data for other elements will be released via JAEA website in future

Event generator mode cannot be used in combination with JENDL-4.0/HE

Calculation of deposition energies is not feasible using either [t-deposit] nor [t-heat]

Applications are limited to e.g. shielding calculation and neutron source designPlease see phits/recommendation/jendlHE

Both xyz and r-z grid fields can be read Both map- and list-type data can be read Applicable to symmetry and asymmetry fields to certain axes Particle motions are analyzed by Runge-Kutta method

10

Function to Read Magnetic Field Map

Electron trajectories in metal target with (left) and without (right) magnetic field

without magnetic field

Source

Please see phits/utility/magmap in more detailMagnetic field data are provided by Dr. Sakata @ Osaka Univ.

with magnetic field

Source