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Spectrometer for momentum‐resolved bremsstrahlung spectroscopy

 

作者: Th. Fauster,   F. J. Himpsel,   J. J. Donelon,   A. Marx,  

 

期刊: Review of Scientific Instruments  (AIP Available online 1983)
卷期: Volume 54, issue 1  

页码: 68-75

 

ISSN:0034-6748

 

年代: 1983

 

DOI:10.1063/1.1137218

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A spectrometer for momentum‐resolved and polarization‐dependent bremsstrahlung spectroscopy (inverse photoemission) in the vacuum UV range is described and the performance of the apparatus is discussed. A Seya–Namioka monochromator combined with a position‐sensitive channel plate device for parallel detection of a wavelength range of 165 A˚ is used as a photon detector and covers an energy regime from 10 to 40 eV with a resolution of 5 A˚. Due to the polarization‐dependent reflectivity of the gold‐coated gratings, the monchromator is also inherently an analyzer for the polarization of the detected light. A space‐charge‐limited Pierce‐type electron gun comprising a BaO dispenser cathode is used as an electron source with 0.1‐A˚−1momentum resolution. The overall energy resolution of the apparatus is 0.3 eV at 20 eV photon energy. The sensitivity is 1.8×104counts per Coulomb and eV for the unoccupieds,pbands of a polycrystalline gold sample.

 

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