skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ultra-high brightness electron beams from very-high field cryogenic radiofrequency photocathode sources

Abstract

Recent investigations of RF copper structures operated at cryogenic temperatures performed by a SLAC-UCLA collaboration have shown a dramatic increase in the maximum surface electric field, to 500 MV/m. We examine use of these fields to enable very high field cryogenic photoinjectors that can attain over an order of magnitude increase in peak electron beam brightness. We present beam dynamics studies relevant to X-ray FEL injectors, using start-to-end simulations that show the high brightness and low emittance of this source enables operation of a compact FEL reaching a photon energy of 80 keV. The preservation of beam brightness in compression, exploiting micro-bunching techniques is discussed. While the gain in brightness at high field is due to increase of the emission current density, further increases in brightness due to lowering of the intrinsic cathode emittance in cryogenic operation are also enabled. While the original proposal for this type of cryogenic, ultra-high field photoinjector has emphasized S-band designs, there are numerous potential advantages that may be conferred by operation in C-band. In conclusion, we examine issues related to experimental implementation in C-band, and expected performance of this type of device in a future hard X-ray FEL such as MaRIE.

Authors:
 [1];  [1]; ORCiD logo [2];  [3];  [3];  [4];  [1];  [3];  [3];  [4];  [3];  [1];  [4];  [4];  [1];  [1];  [3];  [4];  [1]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Istituto Nazionale di Fisica Nucleare (INFN), Frascati (Italy). Lab. Nazionali di Frascati
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1548698
Alternate Identifier(s):
OSTI ID: 1483510; OSTI ID: 1490680
Report Number(s):
LA-UR-18-22640
Journal ID: ISSN 0168-9002
Grant/Contract Number:  
89233218CNA000001; SC0009914; PHY-1549132; AC02-76-SF00515
Resource Type:
Published Article
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 909; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Accelerator Design, Technology, and Operations

Citation Formats

Rosenzweig, James B., Cahill, Alexander, Carlsten, Bruce Eric, Castorina, G., Croia, M., Emma, Cladio, Fukusawa, A., Spataro, B., Alesini, D., Dolgashev, Valeri, Ferrario, Massimo, Lawler, G., Li, R., Limborg, Cecile, Maxson, Jared, Musumeci, Pietro, Pompili, R., Tantawi, Sami, and Williams, O. Ultra-high brightness electron beams from very-high field cryogenic radiofrequency photocathode sources. United States: N. p., 2018. Web. doi:10.1016/j.nima.2018.01.061.
Rosenzweig, James B., Cahill, Alexander, Carlsten, Bruce Eric, Castorina, G., Croia, M., Emma, Cladio, Fukusawa, A., Spataro, B., Alesini, D., Dolgashev, Valeri, Ferrario, Massimo, Lawler, G., Li, R., Limborg, Cecile, Maxson, Jared, Musumeci, Pietro, Pompili, R., Tantawi, Sami, & Williams, O. Ultra-high brightness electron beams from very-high field cryogenic radiofrequency photocathode sources. United States. doi:10.1016/j.nima.2018.01.061.
Rosenzweig, James B., Cahill, Alexander, Carlsten, Bruce Eric, Castorina, G., Croia, M., Emma, Cladio, Fukusawa, A., Spataro, B., Alesini, D., Dolgashev, Valeri, Ferrario, Massimo, Lawler, G., Li, R., Limborg, Cecile, Maxson, Jared, Musumeci, Pietro, Pompili, R., Tantawi, Sami, and Williams, O. Thu . "Ultra-high brightness electron beams from very-high field cryogenic radiofrequency photocathode sources". United States. doi:10.1016/j.nima.2018.01.061.
@article{osti_1548698,
title = {Ultra-high brightness electron beams from very-high field cryogenic radiofrequency photocathode sources},
author = {Rosenzweig, James B. and Cahill, Alexander and Carlsten, Bruce Eric and Castorina, G. and Croia, M. and Emma, Cladio and Fukusawa, A. and Spataro, B. and Alesini, D. and Dolgashev, Valeri and Ferrario, Massimo and Lawler, G. and Li, R. and Limborg, Cecile and Maxson, Jared and Musumeci, Pietro and Pompili, R. and Tantawi, Sami and Williams, O.},
abstractNote = {Recent investigations of RF copper structures operated at cryogenic temperatures performed by a SLAC-UCLA collaboration have shown a dramatic increase in the maximum surface electric field, to 500 MV/m. We examine use of these fields to enable very high field cryogenic photoinjectors that can attain over an order of magnitude increase in peak electron beam brightness. We present beam dynamics studies relevant to X-ray FEL injectors, using start-to-end simulations that show the high brightness and low emittance of this source enables operation of a compact FEL reaching a photon energy of 80 keV. The preservation of beam brightness in compression, exploiting micro-bunching techniques is discussed. While the gain in brightness at high field is due to increase of the emission current density, further increases in brightness due to lowering of the intrinsic cathode emittance in cryogenic operation are also enabled. While the original proposal for this type of cryogenic, ultra-high field photoinjector has emphasized S-band designs, there are numerous potential advantages that may be conferred by operation in C-band. In conclusion, we examine issues related to experimental implementation in C-band, and expected performance of this type of device in a future hard X-ray FEL such as MaRIE.},
doi = {10.1016/j.nima.2018.01.061},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 909,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.nima.2018.01.061

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share: