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Calibrated in-vacuum quantum efficiency system for metallic and III-V thin-film photocathodes
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Rasheed, Atif, Benjamin, Christopher, Elhoussieny, I, Ramachers, Y. and Bell, Gavin R. (2023) Calibrated in-vacuum quantum efficiency system for metallic and III-V thin-film photocathodes. Journal of Vacuum Science & Technology B, 41 (6). 064006 . doi:10.1116/6.0002904 ISSN 2166-2754.
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Official URL: https://doi.org/10.1116/6.0002904
Abstract
The construction and calibration of a high vacuum system for thin film growth and in situ quantum efficiency (QE) measurement are described. Surface cleaning by in situ argon ion sputtering and annealing is supported. The QE measurement is based on an external 265 nm LED and in situ positively biased collector grid. The system is applied to two metallic and two semiconducting photocathodes: polycrystalline silver and copper, and single crystal InP and InSb. Surface cleaning protocols are shown to have a dramatic effect on the QE for all of these materials. The maximum QE values achieved for clean InSb and InP are around 8 × 10−5, for Cu 9 × 10−5 and for Ag 2 × 10−4.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Journal or Publication Title: | Journal of Vacuum Science & Technology B | ||||||||
Publisher: | American Vacuum Society | ||||||||
ISSN: | 2166-2754 | ||||||||
Official Date: | 5 December 2023 | ||||||||
Dates: |
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Volume: | 41 | ||||||||
Number: | 6 | ||||||||
Article Number: | 064006 | ||||||||
DOI: | 10.1116/6.0002904 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Re-use Statement: | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Atif Rasheed, Christopher Benjamin, Ibrahim Elhoussieny, Yorck A. Ramachers, Gavin R. Bell; Calibrated in-vacuum quantum efficiency system for metallic and III-V thin-film photocathodes. J. Vac. Sci. Technol. B 1 November 2023; 41 (6): 064006. https://doi.org/10.1116/6.0002904 | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 29 January 2024 | ||||||||
Date of first compliant Open Access: | 29 January 2024 |
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