中国物理B ›› 2005, Vol. 14 ›› Issue (12): 2440-2443.doi: 10.1088/1009-1963/14/12/012

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Experimental study on helium optical electron polarimetry

丁海兵, 庞文宁, 刘义保, 尚仁成   

  1. Department of Physics, Tsinghua University, Beijing 100084,China
  • 收稿日期:2005-06-21 修回日期:2005-08-23 出版日期:2005-12-20 发布日期:2005-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10134010).

Experimental study on helium optical electron polarimetry

Ding Hai-Bing (丁海兵), Pang Wen-Ning (庞文宁), Liu Yi-Bao (刘义保), Shang Ren-Cheng (尚仁成)   

  1. Department of Physics, Tsinghua University, Beijing 100084,China
  • Received:2005-06-21 Revised:2005-08-23 Online:2005-12-20 Published:2005-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10134010).

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摘要： Optical electron polarimetry is suitable for calibration of a spin-polarized electron source, especially for measurement of polarization of spin-polarized electron beam. In this paper, a new optical electron polarimeter is described, which is based on the circularly polarized He radiation induced by the bombarding of He atoms with spin-polarized electrons. The theoretical basis of the optical electron polarimetry and the structure of the optical electron polarimeter are discussed. The measurement of polarization of spin-polarized electrons produced from a new GaAs (100) spin-polarized electron source is carried out. The result of polarization of 30.8% for our spin-polarized electron source is obtained using the He optical electron polarimeter.

Abstract: Optical electron polarimetry is suitable for calibration of a spin-polarized electron source, especially for measurement of polarization of spin-polarized electron beam. In this paper, a new optical electron polarimeter is described, which is based on the circularly polarized He radiation induced by the bombarding of He atoms with spin-polarized electrons. The theoretical basis of the optical electron polarimetry and the structure of the optical electron polarimeter are discussed. The measurement of polarization of spin-polarized electrons produced from a new GaAs (100) spin-polarized electron source is carried out. The result of polarization of 30.8% for our spin-polarized electron source is obtained using the He optical electron polarimeter.

Key words: optical electron polarimeter, spin-polarized electrons, polarization

中图分类号:  (Polarimeters and ellipsometers)

  • 07.60.Fs
07.77.Ka (Charged-particle beam sources and detectors) 72.25.-b (Spin polarized transport)