Overview of PHITS Ver.3.34 with particular focus on track-structure calculation

Ogawa, Tatsuhiko; Hirata, Yuho; Matsuya, Yusuke; Kai, Takeshi; Sato, Tatsuhiko; Iwamoto, Yosuke; Hashimoto, Shintaro; Furuta, Takuya; Abe, Shinichiro; Matsuda, Norihiro; et al.

EPJ Nuclear Sciences & Technologies (Internet), 10, p.13_1 - 13_8, 2024/11

https://doi.org/10.1051/epjn/2024012

The latest updates on PHITS, a versatile radiation transport code, focusing specifically on track-structure models are presented. Track structure calculations are methods used to simulate the movement of charged particles while explicitly considering each atomic reaction. Initially developed for radiation biology, these calculation methods aimed to analyze the radiation-induced damage to DNA and chromosomes. Several track-structure calculation models, including PHITS-ETS, PHITS-ETS for Si, PHITS-KURBUC, ETSART, and ITSART, have been developed and implemented to PHITS. These models allow users to study the behavior of various particles at the nano-scale across a wide range of materials. Furthermore, potential applications of track-structure calculations have also been proposed so far. This collection of track-structure calculation models, which encompasses diverse conditions, opens up new avenues for research in the field of radiation effects.

Intercomparison of radiation damage calculations in target materials at proton accelerator facilities using various Monte Carlo particle transport codes

Iwamoto, Yosuke; elik, Y.*; Cerutti, F.*; Froeschl, R.*; Lorenzon, T.*; Mokhov, N.*; Pujol, F. S.*; Vlachoudis, V.*; Yao, L.

Proceedings of 15th Workshop on Shielding aspects of Accelerators, Targets, and Irradiation Facilities (SATIF-15) (Internet), p.25 - 34, 2022/09

Secondary particles produced by irradiating a target with a proton beam from a proton accelerator are widely used in the fields of physics research. In the design of proton accelerator facilities, it is necessary to calculate DPA, energy deposition, particle fluence, etc., related to the radiation damage dose to the target using Monte Carlo (MC) particle transport codes such as FLUKA, MARS, MCNP, and PHITS. Therefore, it is important to intercompare and verify the results of damage calculations using these MC codes. In this study, using these MC codes, we calculate damage dose with four sources: (1) a neutron source that irradiates a beryllium target with 30 MeV protons, (2) a spallation neutron source at LANL that injects 800 MeV protons into a tungsten target, (3) a neutrino source at J-PARC that injects 30 GeV protons into a graphite target, (4) an antiproton source at FNAL, which injects 120 GeV protons into a copper target, and compare the calculation results with each MC code.

Frictional properties of Main Fault Gouge of Mont Terri, Switzerland

Aoki, Kazuhiro; Seshimo, Kazuyoshi; Guglielmi, Y.*; Nussbaum, C.*; Shimamoto, Toshihiko*; Ma, S.*; Yao, L.*; Kametaka, Masao*; Sakai, Toru*

no journal, , 

Fault reactivation experiment and frictional properties of Mont Terri Rock Laboratory, Switzerland

Aoki, Kazuhiro; Seshimo, Kazuyoshi; Nussbaum, C.*; Guglielmi, Y.*; Shimamoto, Toshihiko*; Sakai, Toru*; Kametaka, Masao*; Ma, S.*; Yao, L.*

no journal, , 

In order to contribute to the Fault Slip experiment, JAEA has performed friction experiment of borehole cores of the measured interval using a rotary-shear low to high-velocity friction apparatus at Institute of Geology, China Earthquake Administration. Friction experiments were done either dry with room humidity or with 30wt% of HO, at a normal stress of 1.4 and 4.0 MPa and at low to intermediate slip rates ranging 0.21 microns/s to 2.1mm/s. Cylindrical specimens of Ti-Al-V alloy with 40 mm in diameter were used as rotary and stationary pistons and the alloy pistons exhibit similar behaviors as host rock specimens.