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Title: Codeposition of ultrasmooth and high quantum efficiency cesium telluride photocathodes

Abstract

Cesium telluride (CsTe) photocathodes have been the primary choice for electron sources by worldwide accelerators, due to their high quantum yield, stable performance in complex operation environments and long lifetime. In this paper we compared the traditional sequential and the newly developed coevaporation growth of CsTe photocathodes by describing the chemical and structural evolution of each growth method, using in situ, real time x-ray characterization. From the codeposition method, we were able to achieve similar to 2 nm surface roughness, high crystallinity and a quantum efficiency of 19% at 266 nm wavelength.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); National Institutes of Health (NIH)
OSTI Identifier:
1544577
Alternate Identifier(s):
OSTI ID: 1566298; OSTI ID: 1566750
Report Number(s):
BNL-212115-2019-JAAM
Journal ID: ISSN 2469-9888; PRABCJ; 073401
Grant/Contract Number:  
KC0407-ALSJNT-I0013; AC02-98CH1088; AC02-98CH10886; AC02-06CH11357; SC0012704; SC0009540
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 22 Journal Issue: 7; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Gaowei, M., Sinsheimer, J., Strom, D., Xie, J., Cen, J., Walsh, J., Muller, E., and Smedley, J. Codeposition of ultrasmooth and high quantum efficiency cesium telluride photocathodes. United States: N. p., 2019. Web. doi:10.1103/PhysRevAccelBeams.22.073401.
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Gaowei, M., Sinsheimer, J., Strom, D., Xie, J., Cen, J., Walsh, J., Muller, E., & Smedley, J. Codeposition of ultrasmooth and high quantum efficiency cesium telluride photocathodes. United States. doi:10.1103/PhysRevAccelBeams.22.073401.
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Gaowei, M., Sinsheimer, J., Strom, D., Xie, J., Cen, J., Walsh, J., Muller, E., and Smedley, J. Tue . "Codeposition of ultrasmooth and high quantum efficiency cesium telluride photocathodes". United States. doi:10.1103/PhysRevAccelBeams.22.073401.
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@article{osti_1544577,
title = {Codeposition of ultrasmooth and high quantum efficiency cesium telluride photocathodes},
author = {Gaowei, M. and Sinsheimer, J. and Strom, D. and Xie, J. and Cen, J. and Walsh, J. and Muller, E. and Smedley, J.},
abstractNote = {Cesium telluride (CsTe) photocathodes have been the primary choice for electron sources by worldwide accelerators, due to their high quantum yield, stable performance in complex operation environments and long lifetime. In this paper we compared the traditional sequential and the newly developed coevaporation growth of CsTe photocathodes by describing the chemical and structural evolution of each growth method, using in situ, real time x-ray characterization. From the codeposition method, we were able to achieve similar to 2 nm surface roughness, high crystallinity and a quantum efficiency of 19% at 266 nm wavelength.},
doi = {10.1103/PhysRevAccelBeams.22.073401},
journal = {Physical Review Accelerators and Beams},
number = 7,
volume = 22,
place = {United States},
year = {2019},
month = {7}
}
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Journal Article:
Free Publicly Available Full Text
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DOI: 10.1103/PhysRevAccelBeams.22.073401
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Figures / Tables:

FIG. 1 FIG. 1: Schematic diagram of the in situ and real time x-ray characterization setup at beam line G3, CHESS.
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