Development of Neutron Time-of-Flight Measurement System for 1.7-MV Tandem Proton Accelerator with Lithium Target
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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%.
Abstract
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%.
참고문헌 (8)
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