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Journal Articles

Primary knock-on atoms for accelerator facilities; Simulations and experimental design

Tsai, P.-E.; Iwamoto, Yosuke; Hagiwara, Masayuki*

Transactions of the American Nuclear Society, 121(1), p.13 - 16, 2019/11

The importance of PKA characteristics to radiation damage assessment for proton accelerators has been demonstrated in the paper by the PHITS simulations. In order to obtain accurate results of displacement cross section calculated by PHITS, it is therefore critical to have the physics models implemented in PHITS be properly validated by experimental data. With the new measurement system, which has been being developed here at JAEA, it is expected to provide experimental PKA data with low measurement thresholds and good mass resolutions. The test result we obtained at CYRIC, Tohoku University, for the $$Delta E$$-$$E$$ gas ionization chamber as a part of the new measurement system was very promising. We were able to successfully distinguish C, B, Be, Li, and He elements with threshold energies lower than 1 MeV/nucleon in the configuration of 70-MeV proton beam and 920-nm thick C target. More experiments and tests shall continue in the future with heavier targets and higher proton beam energies.

Journal Articles

Establishment of a novel detection system for measuring primary knock-on atoms

Tsai, P.-E.; Iwamoto, Yosuke; Hagiwara, Masayuki*; Sato, Tatsuhiko; Ogawa, Tatsuhiko; Satoh, Daiki; Abe, Shinichiro; Ito, Masatoshi*; Watabe, Hiroshi*

Proceedings of 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2017) (Internet), 3 Pages, 2018/11

The energy spectra of primary knock-on atoms (PKAs) are essential for radiation damage assessment in design of accelerator facilities. However up to date the experimental data are still limited, due to the poor mass resolution and the high measurement threshold energies in the conventional setup of nuclear physics experiments using solid state detectors, which are typically above a few MeV/nucleon. In this study, a novel detection system consisting of two time detectors and one dE-E energy detector is proposed and being constructed to measure the PKA spectra. The system and detector design was based on Monte Carlo simulations by using the PHITS code. The PHITS simulations show that the system is able to distinguish the PKA isotopes above $$sim$$0.2-0.3 MeV/nucleon for A=20$$sim$$30 amu; the PKA mass identification thresholds decrease to $$<$$0.1 MeV/nucleon for PKAs lighter than 20 amu. The detection system will be tested in the summer of 2017, and the test results will be presented at the conference.

Journal Articles

Consistency of bulk damage factor and NIEL for electrons, protons, and heavy ions in Si CCDs

Kuboyama, Satoshi*; Shindo, Hiroyuki*; Hirao, Toshio; Matsuda, Sumio*

IEEE Transactions on Nuclear Science, 49(6), p.2684 - 2689, 2002/12

 Times Cited Count:10 Percentile:56.97(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

JENDL PKA/KERMA file for IFMIF project

Fukahori, Tokio; Chiba, Satoshi; Shibata, Keiichi; Ikeda, Yujiro; Aruga, Takeo; Watanabe, Yukinobu*; Murata, Toru*; Yamano, Naoki*; Kawai, Masayoshi*

Reactor Dosimetry: Radiation Metrology and Assessment (ASTM STP 1398), p.591 - 598, 2001/00

no abstracts in English

JAEA Reports

Effects of primary recoil (PKA) energy spectrum on radiation damage in FCC metals

Iwata, Tadao*; Iwase, Akihiro

JAERI-Research 97-073, 45 Pages, 1997/10

JAERI-Research-97-073.pdf:1.55MB

no abstracts in English

JAEA Reports

Proceedings of the 1996 Symposium on Nuclear Data; November 21-22, 1996, JAERI, Tokai, Ibaraki, Japan

Iguchi, Tetsuo*; Fukahori, Tokio

JAERI-Conf 97-005, 317 Pages, 1997/03

JAERI-Conf-97-005.pdf:10.76MB

no abstracts in English

Journal Articles

Defect production by energetic heavy ions in aluminum and copper

; ; ; *

Journal of Nuclear Materials, 133-134, p.365 - 369, 1985/00

 Times Cited Count:12 Percentile:80.9(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Damage analysis of vanadium irradiated with 14MeV-neutrons

Aruga, T.; Katano, Y.; ; ; ; Shiraishi, K.

Journal of Nuclear Materials, 133-134, p.667 - 670, 1985/00

 Times Cited Count:0 Percentile:0.02(Materials Science, Multidisciplinary)

no abstracts in English

Oral presentation

Establishment of a new detection system for measuring primary knock-on atoms and fission fragments

Tsai, P.-E.; Iwamoto, Yosuke; Hagiwara, Masayuki*; Sato, Tatsuhiko; Satoh, Daiki; Ito, Masatoshi*; Watabe, Hiroshi*

no journal, , 

A new detection system has been designed and constructed dedicating for the measurements of primary knock-on atoms and fission fragments, whose cross sections are critical in the design of accelerator driven systems. The detection system consists of two fast timing detectors and one dE-E energy detector. The particle species are identified by two relationships: the time-of-flight (ToF) vs E and dE vs E, and then the kinetic energy of the identified particles can be derived from the ToF. The PHITS Monte Carlo simulation code was employed for designing detectors and estimating the performance of the detection system. The new detection system will be tested at the JAEA Tandem Facility and the Cyclotron and Radioisotope Center (CYRIC) at the Tohoku University in 2017. The preliminary test results along with the PHITS simulations will be presented at the Workshop.

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