| Experimental study on helium optical electron polarimetry |
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| 作者姓名： | 丁海兵 庞文宁 刘义保 尚仁成 |
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| 作者单位： | Department of Physics, Tsinghua University, Beijing 100084,China;Department of Physics, Tsinghua University, Beijing 100084,China;Department of Physics, Tsinghua University, Beijing 100084,China;Department of Physics, Tsinghua University, Beijing 100084,China |
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| 基金项目： | 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.
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| 关 键 词： | 实验学习 氦 光电子 偏振测定 量子光学 |
| 收稿时间： | 2005-06-21 |
| 修稿时间： | 2005-06-212005-08-23 |
Experimental study on helium optical electron polarimetry |
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| Ding Hai-Bing,Pang Wen-Ning,Liu Yi-Bao and Shang Ren-Cheng.Experimental study on helium optical electron polarimetry[J].Chinese Physics B,2005,14(12):2440-2443. |
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| Authors: | Ding Hai-Bing Pang Wen-Ning Liu Yi-Bao and Shang Ren-Cheng |
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| Institution: | Department of Physics, Tsinghua University, Beijing 100084,China |
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| 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. |
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| Keywords: | optical electron polarimeter spin-polarized electrons polarization |
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