Silica Aerogel Cherenkov Counters for the Isotope Matter-Antimatter Experiment

Silica Aerogel Cherenkov Counters for the Isotope Matter-Antimatter Experiment
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用于同位素物质-反物质实验的二氧化硅气凝胶切伦科夫计数器

DOI：
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发表时间：
1993
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通讯作者：
I. Rasmussen
I. Rasmussen
中科院分区：
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文献类型：
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作者：
A. Labrador;R. Mewaldt;S. M. Schindler;E. Stone;L. Barbier;E. Christian;J. Mitchell;R. Streitmatter;S. Stochaj;I. Rasmussen

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我们描述了大面积气凝胶的设计、开发和性能 切伦科夫计数器用于同位素物质-反物质实验（IMAX）， 一个气球携带的磁力光谱仪IMAX采用了两个切伦科夫计数器 含有折射率n=1.055的二氧化硅气凝胶，用于速度测量， 电子/μ子背景抑制。我们描述了气凝胶烘烤技术， 被发现将测量的光输出从30%提高到超过100%， 单独的气凝胶块，以及保持完整性的安装技术 气凝胶散热器在运输、气球飞行和降落伞着陆过程中的作用。的 该仪器于1992年7月16日从加拿大马尼托巴林恩湖成功地飞行， 保持漂浮约16小时。飞行前的实验室测量和分析 给出了关于计数器性能的数据。
We describe the design, development, and performance of the large area aerogel Cherenkov counters employed in the Isotope Matter-Antimatter Experiment (IMAX), a balloon-borne, magnet spectrometer. IMAX incorporated two Cherenkov counters containing silica aerogels of refractive index n=1.055 for velocity measurement and electron/muon background rejection. We describe aerogel baking techniques which were found to improve measured light output from 30% to more than 100% for individual aerogel blocks, as well as mounting techniques that preserved the integrity of the aerogel radiators during shipping, balloon flight, and parachute landing. The instrument flew successfully from Lynn Lake, Manitoba, Canada, on 16 July 1992, remaining at float for ~16 hours. Laboratory measurements and analysis of pre-flight data on the counters' performance are presented.