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Cosmic Ray Muon Detector (CRMD) 宇宙射線緲子偵測器 組裝、校正、實驗、分析

Cosmic Ray Muon Detector (CRMD) 宇宙射線緲子偵測器 組裝、校正、實驗、分析. 輔仁大學物理學系 助理教授 張敏娟 2010 年 8 月 20 日 2010 年台灣夸克網工作坊. Outline( 大綱 ). Introduction Experiment Setup & Measurement Summary References. Elementary particles( 基本粒子 ). About Muon ( 緲子 ) . Muon decay ( 緲子衰變 ). Experiment Setup ( 實驗裝置 ).

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Cosmic Ray Muon Detector (CRMD) 宇宙射線緲子偵測器 組裝、校正、實驗、分析

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  1. Cosmic Ray Muon Detector (CRMD)宇宙射線緲子偵測器組裝、校正、實驗、分析 輔仁大學物理學系 助理教授 張敏娟 2010年8月20日 2010年台灣夸克網工作坊

  2. Outline(大綱) • Introduction • Experiment Setup & Measurement • Summary • References

  3. Elementary particles(基本粒子)

  4. About Muon (緲子)

  5. Muon decay(緲子衰變)

  6. Experiment Setup(實驗裝置)

  7. Photomultipliers (光電倍增管) • Photomultipliers(P30 CW5) characteristics

  8. VoltageFOR PMT(工作電壓) • Measure PMT’s working voltage

  9. Scintillator (閃爍晶體) • Scintillator

  10. measure muon lifetime(測量緲子生命期) • Double Hit to measure muon lifetime

  11. Details for data taking Parameter: TL 4 1000 WC 00 1X WT 01 00 WT 02 06 WC 02 00 WC 03 08 Set the Threshold voltage greater than 100mV(1000mV ×0.1(DAQ)=100mV) • Parameter of serves (Hex) Open tube (1 2 3 4 5 6 7 8 9 A B C D E F) Set up time delay 6H=610 6 ×10ns=60ns Set up width of gate 0800H=204810 2048 ×10ns=20480ns

  12. DATA uploading

  13. Some results 2.01205+/-0.1979 Feb. 28 Mar.3 Mar.4 Mar.2 Mar.1 2.0557+/-0.0964 2.24713+/-0.1493 2.19366+/-0.1457 2.12057+/-0.0570 Number of decays • Lifetime measure at FJU ph202 Number of decays Number of decays Number of decays Number of decays Decay Length(microsec) Decay Length(microsec) Decay Length(microsec) Decay Length(microsec) Decay Length(microsec)

  14. Lifetime measure at Yushan, 2881m 1.50693+/-0.3351 Number of decays Decay Length(microsec)

  15. Unit :(event/m2、s )

  16. Summery • We find that the flux would become smaller while the angle between the scintillator plane and the horizontal increases. The behavior can be described by the cosine square function. • The flux in the higher story is larger than that in the lower story. Flux number depend on floor. • And astronomical phenomenon will influence our cosmic ray number.

  17. Reference • Friedlander, M. W（. 1989） Cosmic Rays( Harvard University Press). p.12 • Sinitsyna V. G., et. al., Proc. Of the 29th Int. Cosmic Ray Conf., Pune,India, p.79, （2005）. • 黃明輝，物理雙月刊，26：p.679，（2004）. • http://ccwww.kek.jp/pdg/2009/listings/rpp2009-list-muon.pdf • http://www.tam.gov.tw/ • Gaisser , T.K. (1990) Cosmic Rays and Particle Physics (CambridgeUniversity Press) p.1 • http://www.imo.net

  18. THANK YOU

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