Development of neutron time-of-flight measurement system for 1.7-MV tandem proton accelerator with lithium target
In this study, we developed a neutron time-of-flight (nTOF) measurement system for a 1.7-MV tandem proton accelerator with a target covered with 300-nm-thick lithium (Li) layer. With implementation of beam chopping module after its ion source, the accelerator is configured to operate in pulsed-beam...
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| Published in | Nuclear engineering and technology Vol. 54; no. 2; pp. 437 - 441 |
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| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.02.2022
Elsevier 한국원자력학회 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1738-5733 2234-358X |
| DOI | 10.1016/j.net.2021.03.030 |
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| Abstract | In this study, we developed a neutron time-of-flight (nTOF) measurement system for a 1.7-MV tandem proton accelerator with a target covered with 300-nm-thick lithium (Li) layer. With implementation of beam chopping module after its ion source, the accelerator is configured to operate in pulsed-beam mode with a pulse width <50 ns at 20-kHz repetition rate. This enables the gamma flash-type nTOF measurement system to identify the neutron generated with 3-MeV proton beam energy. The nTOF system consists of a 3″ cylindrical NaI(Tl) and four stilbene scintillation detectors. The NaI(Tl) scintillator is placed 50 cm from the Li target to measure the time of beam irradiation on the target, and the stilbene detectors are placed 2 and 2.4 m away to measure nTOF at each location. The nTOF system successfully measured the generated neutron energy at irradiated proton energies of 2.6 and 3.0 MeV with an average energy resolution of 15%. |
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| AbstractList | In this study, we developed a neutron time-of-flight (nTOF) measurement system for a 1.7-MV tandem proton accelerator with a target covered with 300-nm-thick lithium (Li) layer. With implementation of beam chopping module after its ion source, the accelerator is configured to operate in pulsed-beam mode with a pulse width <50 ns at 20-kHz repetition rate. This enables the gamma flash-type nTOF measurement system to identify the neutron generated with 3-MeV proton beam energy. The nTOF system consists of a 3″ cylindrical NaI(Tl) and four stilbene scintillation detectors. The NaI(Tl) scintillator is placed 50 cm from the Li target to measure the time of beam irradiation on the target, and the stilbene detectors are placed 2 and 2.4 m away to measure nTOF at each location. The nTOF system successfully measured the generated neutron energy at irradiated proton energies of 2.6 and 3.0 MeV with an average energy resolution of 15%. In this study, we developed a neutron time-of-flight (nTOF) measurement system for a 1.7-MV tandemproton accelerator with a target covered with 300-nm-thick lithium (Li) layer. With implementation ofbeam chopping module after its ion source, the accelerator is configured to operate in pulsed-beammode with a pulse width <50 ns at 20-kHz repetition rate. This enables the gamma flash-type nTOFmeasurement system to identify the neutron generated with 3-MeV proton beam energy. The nTOFsystem consists of a 300 cylindrical NaI(Tl) and four stilbene scintillation detectors. The NaI(Tl) scintillatoris placed 50 cm from the Li target to measure the time of beam irradiation on the target, and the stilbenedetectors are placed 2 and 2.4 m away to measure nTOF at each location. The nTOF system successfullymeasured the generated neutron energy at irradiated proton energies of 2.6 and 3.0 MeV with an averageenergy resolution of 15%. KCI Citation Count: 1 |
| Author | Kim, Donghwan Kim, Geehyun Lee, Pilsoo Hwang, Y.S. Dang, Jeong-Jeung Chung, Kyoung-Jae Kang, Jin-Goo Lim, Soobin |
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| Cites_doi | 10.1016/S0168-9002(98)00425-2 10.1016/0029-554X(71)90592-1 10.3938/jkps.77.373 10.1088/1742-6596/1350/1/012066 |
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| References | Kim (bib3) 2017 Knoll (bib7) 2010 Kim (bib8) 2020; 77 Lee (bib6) 2019; 1350 Knoll (bib4) 1983 Bayanov (bib1) 1998; 413.2–3 Kulcinski, Wittkower, Ryding (bib2) 1971; 94 (bib5) 2020 Kim (10.1016/j.net.2021.03.030_bib3) 2017 Bayanov (10.1016/j.net.2021.03.030_bib1) 1998; 413.2–3 (10.1016/j.net.2021.03.030_bib5) 2020 Kim (10.1016/j.net.2021.03.030_bib8) 2020; 77 Knoll (10.1016/j.net.2021.03.030_bib4) 1983 Knoll (10.1016/j.net.2021.03.030_bib7) 2010 Kulcinski (10.1016/j.net.2021.03.030_bib2) 1971; 94 Lee (10.1016/j.net.2021.03.030_bib6) 2019; 1350 |
| References_xml | – volume: 1350 start-page: 1 year: 2019 ident: bib6 article-title: Characterization study of fast neutron sources based on proton accelerators at KOMAC publication-title: J. Phys. Conf. Ser. – volume: 77 start-page: 373 year: 2020 end-page: 378 ident: bib8 article-title: Upgrade plan of the KOMAC proton linac for the atmospheric radiation test on semiconductor devices publication-title: J. Kor. Phys. Soc. – year: 2017 ident: bib3 article-title: Preliminary design of a new beam line at 1.7-MV tandem accelerator of KOMAC publication-title: Transactions of the Korean Nuclear Society Autumn Meeting – year: 2010 ident: bib7 article-title: Radiation Detection and Measurement – volume: 94 start-page: 365 year: 1971 end-page: 375 ident: bib2 article-title: Use of heavy ions from a tandem accelerator to simulate high fluence, fast neutron damage in metals publication-title: Nucl. Instrum. Methods – volume: 413.2–3 start-page: 397 year: 1998 end-page: 426 ident: bib1 article-title: Accelerator-based neutron source for the neutron-capture and fast neutron therapy at hospital publication-title: Nucl. Instrum. Methods A – year: 1983 ident: bib4 article-title: Radioisotope Neutron Sources, Neutron Sources for Basic Physics and Applications – year: 2020 ident: bib5 publication-title: User Manual UM3148 DT5730/DT5725 – volume: 413.2–3 start-page: 397 year: 1998 ident: 10.1016/j.net.2021.03.030_bib1 article-title: Accelerator-based neutron source for the neutron-capture and fast neutron therapy at hospital publication-title: Nucl. Instrum. Methods A doi: 10.1016/S0168-9002(98)00425-2 – year: 2017 ident: 10.1016/j.net.2021.03.030_bib3 article-title: Preliminary design of a new beam line at 1.7-MV tandem accelerator of KOMAC – year: 2020 ident: 10.1016/j.net.2021.03.030_bib5 – volume: 94 start-page: 365 issue: 2 year: 1971 ident: 10.1016/j.net.2021.03.030_bib2 article-title: Use of heavy ions from a tandem accelerator to simulate high fluence, fast neutron damage in metals publication-title: Nucl. Instrum. Methods doi: 10.1016/0029-554X(71)90592-1 – year: 2010 ident: 10.1016/j.net.2021.03.030_bib7 – volume: 77 start-page: 373 issue: 5 year: 2020 ident: 10.1016/j.net.2021.03.030_bib8 article-title: Upgrade plan of the KOMAC proton linac for the atmospheric radiation test on semiconductor devices publication-title: J. Kor. Phys. Soc. doi: 10.3938/jkps.77.373 – year: 1983 ident: 10.1016/j.net.2021.03.030_bib4 – volume: 1350 start-page: 1 year: 2019 ident: 10.1016/j.net.2021.03.030_bib6 article-title: Characterization study of fast neutron sources based on proton accelerators at KOMAC publication-title: J. Phys. Conf. Ser. doi: 10.1088/1742-6596/1350/1/012066 |
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| Title | Development of neutron time-of-flight measurement system for 1.7-MV tandem proton accelerator with lithium target |
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