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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.

Purpose: We have studied injury protection using virtual reality (VR). This study investigated biological response to immersion in the VR induced by Oculus Rift. Method: Healthy ten adult participated in this study. We measured their height, body weight, center of gravity sway and electromyogram (EMG). The center of gravity sway was measured by the force plate and total locus length (LNG) and rectangular area (REC.A) were calculated. EMG of rectus femoris muscle, hamstring, gastrocnemius muscle and tibialis anterior muscle were measured. Measurements were compared between normal condition and VR condition during a standing position. Video of ski jump was used for the VR condition. Results: REC.A at normal condition was 4.0 ± 2.3 cm². REC.A significantly increased in the VR condition (8.3 ± 4.4 cm²). LNG also increased in the VR condition. Rectus femoris muscle and hamstring activity did not differ between the two conditions. Gastrocnemius muscle activity significantly increased in the VR. Discussion: The present study indicates that immersion in the VR affect center of gravity in healthy adults. The present results suggest a possibility that the immersion in the VR is effective to misunderstanding of recognition. [ABSTRACT FROM AUTHOR]