CSNSのグリッドイオン化室を用いた光電荷粒子識別方法の改良 Back-n ホワイトニュートロン源
Hai-Zheng Chen1, Juan Liu2, Ruirui Fan3
1Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China; Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing 100049, China; Spallation Neutron Source Science Center (SNSSC), Dongguan, 523803, China.
まとめ
この研究は,高ニュートロン流量施設での粒子の収量を正確に測定するための新しい方法を導入しています. 粒子の同時発生を修正し,核反応研究のデータ精度を向上させます.
科学分野:
- 核物理学 核物理学とは
- 探知器技術 探知器技術について
- 素粒子物理学 素粒子物理学について
背景:
- 中国分裂中性子源 (CSNS) の光電粒子探知機配列 (LPDA) は,高中性子流量によるイベントの積み重ねに直面しています.
- 6Li(n,t) 4He反応チャネルに関する既存の方法は,同時に起こるトリトンイベントを無視することによって,粒子の産出量を過小評価する.
研究 の 目的:
- 高流量環境におけるピールアップイベントの解決のための新しい方法を開発する.
- 粒子の検出を同時に行うことを考慮することで,粒子の収量を正確に定量化します.
主な方法:
- 素粒子エネルギー (E) とイオン化範囲 (R(E)) を関連付ける新しい関数 g(E,R(E)) が開発されました.
- 0.3 eV~1 MeVのニュートロンエネルギーデータに対して,マルチパラメータ分析を行った.
- 統計分布を用いて,ダブルトリトンイベントの割合を抽出しました.
主要な成果:
- ダブルトリトンの症例は,全症例の3.4%で確認された.
- トリトンのイベントは,全体の94.6%を占めた.
- "無効イベント"は,全イベントの2%を占めました.
結論:
- 提案された方法は,高流量条件下でのピールアップイベントを成功裏に解決します.
- この研究は,原子炉や加速器駆動システムなどの高速環境における検出器設計の実現可能なアプローチを提供します.
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