A neutron-diagnostic method using a BF<sub>3</sub> detector array for ultrashort-pulse-laser neutron sources in strong gamma-ray environments

Guo, E. F.; Chen, Jie; Xiong, Jie; He, Zhong-Wu; Wang, C.; H, An; Huang, Xiang; Wang, Weizong; Dong, Jun

doi:10.1088/1748-0221/14/10/p10016

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…The PuBe neutron source was placed at a distance of 30 cm from the detector unit and the emitted neutrons were moderated using 10 cm of HDPE placed in between. Also, we placed 5 cm of lead in front of the detector to reduce the influence of 4.4 MeV γ ray of 12 C that is occasionally produced in the PuBe reaction. Performing the same exercise as with the 137 Cs data, we constructed the energy spectrum for the individual PMTs with the coincidence requirement.…”

Section: B Prototype Testingmentioning

confidence: 99%

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Design and commissioning of a neutron counter adapted to high-intensity laser matter interactions

Lelasseux

Söderström

Aogaki

et al. 2021

Review of Scientific Instruments

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The advent of multi-PW laser facilities world-wide opens new opportunities for nuclear physics. With this perspective, we developed a neutron counter taking into account the specifics of a high-intensity laser environment. Using GEANT4 simulations and prototype testings, we report on the design of a modular neutron counter based on boron-10 enriched scintillators and a high-density polyethylene moderator. This detector has been calibrated using a plutonium–beryllium neutron source and commissioned during an actual neutron-producing laser experiment at the LULI2000 facility (France). An overall efficiency of 4.37(59)% has been demonstrated during calibration with a recovery time of a few hundred microseconds after laser–plasma interaction.

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Section: B Prototype Testingmentioning

confidence: 99%

“…Thus, the neutrons can be easily identified statistically from their energy deposition. One example of recent developments in this direction for laser-driven neutron diagnostics is Reference 12 , where a series of tubes filled with BF 3 gas was used as a sensitive volume, embedded in paraffin for moderation.…”

Section: Introductionmentioning

confidence: 99%

Design and commissioning of a neutron counter adapted to high-intensity laser matter interactions

Lelasseux

Söderström

Aogaki

et al. 2021

Review of Scientific Instruments

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“…The detection principle of the BF 3 proportional counter for neutron detection relies on the following two reactions. n + Since the energy released in both of these reactions is significantly higher than the energy loss of electrons caused by gamma in the gas detector, the BF 3 detector is well-equipped to effectively eliminate gamma and noise interference [19].…”

Section: Introductionmentioning

confidence: 99%

Development of a neutron yield measurement system utilizing BF_3 detectors on the HL-3 tokamak

Wen,

Yuan,

Feng

et al. 2024

J. Inst.

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A neutron yield measurement system, comprising five BF3 proportional counters with excellent n/γ discrimination capabilities, has been meticulously developed and implemented on the HL-3 tokamak to provide time-resolved assessments of neutron emission rates. The size of moderator, optimized for the flat energy responses, was skillfully simulated and designed using the MCNP code. An in-depth analysis of measurement errors stemming from pile-up phenomena determined that the upper limit of the count rate, under the current electronics design, is 131 kcps with a relative error of less than 20%. Drawing from the pulse amplitude spectrum obtained from a 252Cf neutron source and experimentation on the HL-3 tokamak, the amplitude threshold for the BF3 neutron detector systems was judiciously established. Furthermore, it was conclusively affirmed that the neutron yield measurement system possesses the capability to effectively discriminate between neutron and gamma signals. During HL-3 discharges, deuterium-deuterium (DD) neutrons were reliably detected with a temporal resolution of 10 ms, and the variations in neutron count rates was found to be in alignment with the neutral beam injection. Ultimately, the total neutron yield was successfully estimated through the utilization of count rates from four BF3 detectors, thereby validating the robust performance of the neutron yield measurement system.

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A neutron-diagnostic method using a BF₃ detector array for ultrashort-pulse-laser neutron sources in strong gamma-ray environments

Cited by 2 publications

References 14 publications

Design and commissioning of a neutron counter adapted to high-intensity laser matter interactions

Design and commissioning of a neutron counter adapted to high-intensity laser matter interactions

Development of a neutron yield measurement system utilizing BF_3 detectors on the HL-3 tokamak

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A neutron-diagnostic method using a BF3 detector array for ultrashort-pulse-laser neutron sources in strong gamma-ray environments

Cited by 2 publications

References 14 publications

Design and commissioning of a neutron counter adapted to high-intensity laser matter interactions

Design and commissioning of a neutron counter adapted to high-intensity laser matter interactions

Development of a neutron yield measurement system utilizing BF_3 detectors on the HL-3 tokamak

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Product

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A neutron-diagnostic method using a BF₃ detector array for ultrashort-pulse-laser neutron sources in strong gamma-ray environments