Near atomically smooth alkali antimonide photocathode thin films
Abstract
Nano-roughness is one of the major factors degrading the emittance of electron beams that can be generated by high efficiency photocathodes, such as the thermally reacted alkali antimonide thin films. In this paper, we demonstrate a co-deposition based method for producing alkali antimonide cathodes that produce near atomic smoothness with high reproducibility. Here, we calculate the effect of the surface roughness on the emittance and show that such smooth cathode surfaces are essential for operation of alkali antimonide cathodes in high field, low emittance radio frequency electron guns and to obtain ultracold electrons for ultrafast electron diffraction applications.
- Authors:
-
[1];
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- OSTI Identifier:
- 1379694
- Alternate Identifier(s):
- OSTI ID: 1361746
- Grant/Contract Number:
- AC02-05CH11231; KC407-ALSJNT-I00103; SC0005713; KC0407-ALSJNT-I0013
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 4; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Feng, Jun, Karkare, Siddharth, Nasiatka, James, Schubert, Susanne, Smedley, John, and Padmore, Howard. Near atomically smooth alkali antimonide photocathode thin films. United States: N. p., 2017.
Web. doi:10.1063/1.4974363.
Feng, Jun, Karkare, Siddharth, Nasiatka, James, Schubert, Susanne, Smedley, John, & Padmore, Howard. Near atomically smooth alkali antimonide photocathode thin films. United States. doi:10.1063/1.4974363.
Feng, Jun, Karkare, Siddharth, Nasiatka, James, Schubert, Susanne, Smedley, John, and Padmore, Howard. Tue .
"Near atomically smooth alkali antimonide photocathode thin films". United States. doi:10.1063/1.4974363. https://www.osti.gov/servlets/purl/1379694.
@article{osti_1379694,
title = {Near atomically smooth alkali antimonide photocathode thin films},
author = {Feng, Jun and Karkare, Siddharth and Nasiatka, James and Schubert, Susanne and Smedley, John and Padmore, Howard},
abstractNote = {Nano-roughness is one of the major factors degrading the emittance of electron beams that can be generated by high efficiency photocathodes, such as the thermally reacted alkali antimonide thin films. In this paper, we demonstrate a co-deposition based method for producing alkali antimonide cathodes that produce near atomic smoothness with high reproducibility. Here, we calculate the effect of the surface roughness on the emittance and show that such smooth cathode surfaces are essential for operation of alkali antimonide cathodes in high field, low emittance radio frequency electron guns and to obtain ultracold electrons for ultrafast electron diffraction applications.},
doi = {10.1063/1.4974363},
journal = {Journal of Applied Physics},
number = 4,
volume = 121,
place = {United States},
year = {2017},
month = {1}
}
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Works referenced in this record:
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- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 608, Issue 1, p. S54-S56