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Precision Measurement of Muons on Mount Norikura for Cosmic Ray Investigations

This study focuses on precise muon measurements on Mount Norikura for cosmic ray research. Recent observations, energy conservation strategies, and observational results are discussed. The system's components, power consumption estimates, and data processing methods are detailed, including results from 2001 and 2003. The study aims to understand cosmic ray behavior in the region and optimize measurement efficiency.

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Precision Measurement of Muons on Mount Norikura for Cosmic Ray Investigations

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  1. 乗鞍岳におけるミューオンの精密測定 宗像一起、安江、加藤（信州大理）、 藤本、小島（名女大）、藤井（STE研）、 岡田（宇宙線研）、三井（山梨学院大）　ほか • 　観測の目的 • 　最近の観測結果 • 　省電力化（冬季閉鎖に備えて）

  2. 観測の目的 ecliptic plane Cosmic-ray depleted region H. Cane SpaceSci. Rev., 93, 2000

  3. ロスコーン型強度欠損の模式図Ruffolo[1999]

  4. 0.8 m 4.4 m 4.4 m Mt. Norikura Muon Hodoscope • 比例計数管１７６（４４４）本（有効検出面積 ～２０ｍ２） • 鉛直方向計数率　７.６１０４／時 • 入射角度分解能～７ • ２１２１方向（０～５１）

  5. ２００１年４月のロスコーン観測結果 • ２００３年１０月の大FD観測結果

  6. FPGA（Xlinx XC2S200） • Fast identification of incident direction • Count rate in 441 (2121) directions can be stored in 3 FPGAs • Flexible system can be realized • Low power consumption

  7. 消費電力（見積り） • 比例計数管アンプ　 　～７０（１０）W • レコーダ入力バッファ外 　～１０（０）W • データレコーダ（FPGA）　 　～３W • ノートPC　 　～２０W 　　　計　　　　　　　　　　　　　～１０３（３３）W

  8. W N latitude E S 乗鞍 median rigi. CR の漸近軌道 longitude

  9. Prototype network (2001~)

  10. Vertical intensity variations ( 9 – 14 April, 2001 ) Loss-cone

  11. CR observation RLGx RLGy RLGz April 11, 2001 August 27, 2001

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