Abstract
Highly reliable 3He gas detectors are most often used in neutron scattering experiments but have disadvantages such as low count rates and low position resolutions. In this study, a 3He gas detector system called NEUNET-HCR was developed, whose count rate is approximately 10 times that of the current NEUNET system, which was developed for a high position resolution with a low count rate. NEUNET-HCR achieved a maximum count rate of 535 kcps per detector, with a loss of approximately 30%. As the NEUNET-HCR system was developed based on the NEUNET system, various improvements were required to achieve the high count rate. Further, a high count rate was achieved in the NEUNET-HCR system without significantly degrading the position resolution.
Highlights
The industrial use of neutrons has become widespread, and compact accelerator-driven neutron sources have been used to develop new materials
The development of neutron detectors that support these experimental facilities has been delayed, and 3He gas detectors are still used in many neutron experiments. 3He gas detectors are the most reliable neutron detectors and are typically utilized as positionsensitive detectors (PSDs) [1, 2]
We developed a novel high-count-rate 3He PSD system
Summary
The industrial use of neutrons has become widespread, and compact accelerator-driven neutron sources have been used to develop new materials. These detectors have low count rates and low position resolutions. (CETD), which manufactures PSDs, and the High Energy Accelerator Research Organization (KEK), which develops readout circuits for neutron detectors. A high-count-rate readout circuit was developed based on a NEUNET system [1]. The NEUNET system was originally designed based on the assumption that the PSD had a low count rate; the processing speed needed to be increased. The pulse width measurement method designed using another detector system [3] was applied to develop a method for distinguishing between fast and slow PSDs
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