Development of new-type nuclear emulsion for a balloon-borne emulsion gamma-ray telescope experiment
Development of new-type nuclear emulsion for a balloon-borne emulsion gamma-ray telescope experiment
复制标题
球载乳剂伽马射线望远镜实验用新型核乳剂研制
DOI：
10.1088/1748-0221/10/12/p12018
复制
发表时间：
2015
影响因子：
1.3
通讯作者：
S. Takahashi et al.
中科院分区：
文献类型：
--
作者：
K. Ozaki;S. Takahashi et al.
本研究报道了一种新型核乳剂，它提高了带电粒子探测的寻迹效率。这种乳剂被应用于GRAINE项目，这是一个由气球携带的实验，通过乳剂γ-射线望远镜观察宇宙射线。新的乳胶膜显著提高了对γ射线的探测效率。第二次GRAINE气球搭载实验(GRAINE-2015)的核乳胶凝胶和胶片完全自主生产。还开发了新型乳胶膜的新处理方法。随着时间的推移，存储的胶片对最小的电离粒子逐渐变得不敏感，但可以通过重置过程恢复原始的灵敏度。此外，潜在图像的褪色可以通过干燥过程来阻止。为了使新型胶片感光并避免其褪色，在2015年之前立即进行了乳胶前处理。2015年5月12日，澳大利亚成功完成了用乳胶γ-射线望远镜进行的气球飞行。通过自动光学显微镜扫描和穿透轨迹分析，证实了贴装薄膜的高寻轨效率(97%)。旨在探测船帆座脉冲星的γ-射线事件探测分析正在进行中。
This study reports a new-type of nuclear emulsion that improves the track-finding efficiency of charged particle detection. The emulsion is applied to the GRAINE project, a balloon-borne experiment that observes cosmic γ-rays through an emulsion γ-ray telescope. The new emulsion film dramatically improves the detection efficiency for γ-rays. The nuclear emulsion gel and films for the second GRAINE balloon-borne experiment (GRAINE-2015) were fully self-produced by ourselves. New handling methods for the novel emulsion film have also been developed. Over time, the stored films gradually become desensitized to minimum ionizing particles, but the original sensitivity can be restored by a resetting process. Moreover, the fading of latent images can be arrested by a drying process. To sensitize the new-type films and avoid their fading, emulsion preprocessing was applied immediately prior to GRAINE-2015. A balloon flight with the emulsion γ-ray telescope was successfully completed in Australia on 12th May 2015. By scanning with automated optical microscopes and analyzing the penetrated tracks, we confirmed the high track-finding efficiency (97%) of the mounted films. The analysis of γ-ray event detection, aims at detecting Vela pulsar, is in progress.