Design of an efficient monochromatic electron source for inverse photoemission spectroscopy

GENG Dong-Ping; YANG Ying-Guo; LIU Shu-Hu; HONG Cai-Hao; GAO Xing-Yu

doi:10.1088/1674-1137/38/11/118202

Chinese Physics C> 2014, Vol. 38> Issue(11) : 118202 DOI: 10.1088/1674-1137/38/11/118202

Design of an efficient monochromatic electron source for inverse photoemission spectroscopy

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A design for an efficient monochromatic electron source for Inverse Photoemission Spectroscopy (IPES) apparatus is described. The electron source consists of a BaO cathode, a focus electrostatic lens, a hemispherical deflection monochromator (HDM), and a transfer electrostatic lens. The HDM adopts a "slit-in and slit-out" structure and the degradation of first-order focusing is corrected by two electrodes between the two hemispheres, which has been investigated by both analytical methods and electron-ray tracing simulations using the SIMION program. Through the focus lens, the HDM, and the standard five-element transfer lens, an optimal energy resolution is estimated to be about 53 MeV with a beam flux of 27 μA. Pass energy (P.E.) of 10 eV and 5 eV are discussed, respectively.

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GENG Dong-Ping, YANG Ying-Guo, LIU Shu-Hu, HONG Cai-Hao and GAO Xing-Yu. Design of an efficient monochromatic electron source for inverse photoemission spectroscopy[J]. Chinese Physics C, 2014, 38(11): 118202. doi: 10.1088/1674-1137/38/11/118202

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Received: 2014-01-15
Revised: 2014-05-05

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Design of an efficient monochromatic electron source for inverse photoemission spectroscopy

Corresponding author: HONG Cai-Hao,

Corresponding author: GAO Xing-Yu,

Received Date: 2014-01-15

Accepted Date: 2014-05-05

Available Online: 2014-11-05

Abstract: A design for an efficient monochromatic electron source for Inverse Photoemission Spectroscopy (IPES) apparatus is described. The electron source consists of a BaO cathode, a focus electrostatic lens, a hemispherical deflection monochromator (HDM), and a transfer electrostatic lens. The HDM adopts a "slit-in and slit-out" structure and the degradation of first-order focusing is corrected by two electrodes between the two hemispheres, which has been investigated by both analytical methods and electron-ray tracing simulations using the SIMION program. Through the focus lens, the HDM, and the standard five-element transfer lens, an optimal energy resolution is estimated to be about 53 MeV with a beam flux of 27 μA. Pass energy (P.E.) of 10 eV and 5 eV are discussed, respectively.

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Design of an efficient monochromatic electron source for inverse photoemission spectroscopy

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