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Title: Temperature dependence of alkali-antimonide photocathodes: Evaluation at cryogenic temperatures

Cs xK ySb photocathodes were manufactured on a niobium substrate and evaluated over a range of temperatures from 300 to 77 K. Vacuum conditions were identified that minimize surface contamination due to gas adsorption when samples were cooled below room temperature. Here, measurements of photocathode spectral response provided a means to evaluate the photocathode bandgap dependence on temperature and to predict photocathode quantum efficiency at 4 K, a typical temperature at which superconducting radio frequency photoguns operate.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [1]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Metropolitan Autonomous Univ., Mexico City (Mexico)
  3. National Autonomous Univ. of Mexico, Mexico City (Mexico)
Publication Date:
Report Number(s):
JLAB-ACC-17-2625; DOE/OR/-23177-4307
Journal ID: ISSN 2469-9888; PRABCJ; TRN: US1800864
Grant/Contract Number:
AC05-06OR23177
Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 20; Journal Issue: 10; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Superconductivity; Band gap; Semiconductor
OSTI Identifier:
1402540
Alternate Identifier(s):
OSTI ID: 1415941

Mamun, M. A., Hernandez-Flores, M. R., Morales, E., Hernandez-Garcia, C., and Poelker, M.. Temperature dependence of alkali-antimonide photocathodes: Evaluation at cryogenic temperatures. United States: N. p., Web. doi:10.1103/PhysRevAccelBeams.20.103403.
Mamun, M. A., Hernandez-Flores, M. R., Morales, E., Hernandez-Garcia, C., & Poelker, M.. Temperature dependence of alkali-antimonide photocathodes: Evaluation at cryogenic temperatures. United States. doi:10.1103/PhysRevAccelBeams.20.103403.
Mamun, M. A., Hernandez-Flores, M. R., Morales, E., Hernandez-Garcia, C., and Poelker, M.. 2017. "Temperature dependence of alkali-antimonide photocathodes: Evaluation at cryogenic temperatures". United States. doi:10.1103/PhysRevAccelBeams.20.103403.
@article{osti_1402540,
title = {Temperature dependence of alkali-antimonide photocathodes: Evaluation at cryogenic temperatures},
author = {Mamun, M. A. and Hernandez-Flores, M. R. and Morales, E. and Hernandez-Garcia, C. and Poelker, M.},
abstractNote = {CsxKySb photocathodes were manufactured on a niobium substrate and evaluated over a range of temperatures from 300 to 77 K. Vacuum conditions were identified that minimize surface contamination due to gas adsorption when samples were cooled below room temperature. Here, measurements of photocathode spectral response provided a means to evaluate the photocathode bandgap dependence on temperature and to predict photocathode quantum efficiency at 4 K, a typical temperature at which superconducting radio frequency photoguns operate.},
doi = {10.1103/PhysRevAccelBeams.20.103403},
journal = {Physical Review Accelerators and Beams},
number = 10,
volume = 20,
place = {United States},
year = {2017},
month = {10}
}

Works referenced in this record:

The Analysis of Photoelectric Sensitivity Curves for Clean Metals at Various Temperatures
journal, July 1931