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Title: Mean transverse energy of ultrananocrystalline diamond photocathode

Abstract

Nitrogen incorporated ultrananocrystalline diamond [(N)UNCD] could be an enabling material platform for injector photocathode applications due to its high emissivity. While the quantum efficiency (QE) of UNCD was reported by many groups, no experimental measurements of the intrinsic emittance/mean transverse energy (MTE) have been reported. Here, MTE measurement results for an (N)UNCD photocathode in the photon energy range from 4.41 to 5.26 eV are described. The MTE demonstrates no noticeable dependence on the photon energy, with an average value of 266 meV. This spectral behavior is shown not to be dependent upon physical or chemical surface roughness and inconsistent with low electron effective mass emission from graphitic grain boundaries but may be associated with emission from spatially confined states in the grain boundaries. Lastly, the combined effect of low and constant MTE and high QE, which increases with respect to the excess laser energy, may pave the way for bright UNCD photocathodes for electron injectors.

Authors:
 [1];  [2];  [1]; ORCiD logo [3];  [3];  [3];  [2];  [4]
  1. Illinois Inst. of Technology, Chicago, IL (United States)
  2. Univ. of Illinois, Chicago, IL (United States)
  3. Euclid TechLabs LLC, Bolingbrook, IL (United States)
  4. Michigan State Univ., East Lansing, MI (United States)
Publication Date:
Research Org.:
Euclid Techlabs LLC, Cleveland, OH (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1611969
Grant/Contract Number:  
SC0013145; AC02-06CH11357; NSF-1739150; PHYS-1535279
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 9; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; physics; semiconductors; diamond; work functions; carbon based materials; photocathodes; quantum efficiency

Citation Formats

Chen, Gongxiaohui, Adhikari, Gowri, Spentzouris, Linda, Kovi, Kiran Kumar, Antipov, Sergey, Jing, Chunguang, Schroeder, W. Andreas, and Baryshev, Sergey V.. Mean transverse energy of ultrananocrystalline diamond photocathode. United States: N. p., 2019. Web. https://doi.org/10.1063/1.5084167.
Chen, Gongxiaohui, Adhikari, Gowri, Spentzouris, Linda, Kovi, Kiran Kumar, Antipov, Sergey, Jing, Chunguang, Schroeder, W. Andreas, & Baryshev, Sergey V.. Mean transverse energy of ultrananocrystalline diamond photocathode. United States. https://doi.org/10.1063/1.5084167
Chen, Gongxiaohui, Adhikari, Gowri, Spentzouris, Linda, Kovi, Kiran Kumar, Antipov, Sergey, Jing, Chunguang, Schroeder, W. Andreas, and Baryshev, Sergey V.. Mon . "Mean transverse energy of ultrananocrystalline diamond photocathode". United States. https://doi.org/10.1063/1.5084167. https://www.osti.gov/servlets/purl/1611969.
@article{osti_1611969,
title = {Mean transverse energy of ultrananocrystalline diamond photocathode},
author = {Chen, Gongxiaohui and Adhikari, Gowri and Spentzouris, Linda and Kovi, Kiran Kumar and Antipov, Sergey and Jing, Chunguang and Schroeder, W. Andreas and Baryshev, Sergey V.},
abstractNote = {Nitrogen incorporated ultrananocrystalline diamond [(N)UNCD] could be an enabling material platform for injector photocathode applications due to its high emissivity. While the quantum efficiency (QE) of UNCD was reported by many groups, no experimental measurements of the intrinsic emittance/mean transverse energy (MTE) have been reported. Here, MTE measurement results for an (N)UNCD photocathode in the photon energy range from 4.41 to 5.26 eV are described. The MTE demonstrates no noticeable dependence on the photon energy, with an average value of 266 meV. This spectral behavior is shown not to be dependent upon physical or chemical surface roughness and inconsistent with low electron effective mass emission from graphitic grain boundaries but may be associated with emission from spatially confined states in the grain boundaries. Lastly, the combined effect of low and constant MTE and high QE, which increases with respect to the excess laser energy, may pave the way for bright UNCD photocathodes for electron injectors.},
doi = {10.1063/1.5084167},
journal = {Applied Physics Letters},
number = 9,
volume = 114,
place = {United States},
year = {2019},
month = {3}
}

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    Works referencing / citing this record:

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    journal, May 2019

    • Chubenko, Oksana; Baturin, Stanislav S.; Baryshev, Sergey V.
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    High power conditioning and benchmarking of planar nitrogen-incorporated ultrananocrystalline diamond field emission electron source
    journal, December 2019