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Method to identify electrons emerging from elementary particle interactions by detecting Synchrotron radiation X rays.

Research Project

Project/Area Number 60460022
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 核・宇宙線・素粒子
Research InstitutionNational Laboratory for High Energy Physics, Niigata University

Principal Investigator

ABE Kazuo  National Laboratory for High Energy Physics, その他, 助教授 (80167931)

Co-Investigator(Kenkyū-buntansha) MIYANO Kazumasa  Niigata University, 理学部, 助教授 (10011529)
SAKAI Yoshihide  National Laboratory for High Energy Physics, トリスタン計画推進部衝突ビーム測定器研究系, 助手 (90170571)
MAKI Akihiro  National Laboratory for High Energy Physics, 物理研究系, 助教授 (40044755)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 1986: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1985: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordsdrift chamber / xenon gas / <Lorent_3> angle / flash ADC / synchrotron radiation / エックス線
Research Abstract

For a method to identify electrons by detecting synchrotron X rays, it is important to understand properties of xenon gas, which has high absorption efficiency for X rays, as a drift chamber gas. We feel that we accomplished this purpose in our research project. We measured drift velocity, gas gain, and <Lorent_3> angle which is the angle between the direction of drifting electrons and electric field due to magnetic field. Our data on drift velocities and gas gain agreed well with the previously published data by other groups. On the other hand, our measurements of <Lorent_3> angle for xenon gas is the first measurement. Our data indicates that the <Lorent_3> angle is much larger than we expect based on a simple model of the kinetic theory of gas. We could reduce the angle somewhat by changing the quench gas mixing fraction, but still much larger than our expectation.
We studied the signal readout scheme of using the flash ADC which records the entire waveform by 100MHz sampling speed. Analysis of charged particle tracks by this method gave the same result as can be obtained by the ordinary method. Identifying energy clusters caused by X rays by this method must be further investigated.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] K.Abe: Nuclear Instruments and Methods. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K. Abe: "Measurement of Drift Velocities and <Lorent_3> Angles for Xenon-hydrocarbon Gas Mixtures" Nuclear Instruments and Methods.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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