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Title: Upgrade possibilities for continuous wave rf electron guns based on room-temperature very high frequency technology

The past decade was characterized by an increasing scientific demand for extending towards higher repetition rates (MHz class and beyond) the performance of already operating lower repetition rate accelerator-based instruments such as x-ray free electron lasers (FELs) and ultrafast electron diffraction (UED) and microscopy (UEM) instruments. Such a need stimulated a worldwide spread of a vibrant R & D activity targeting the development of high-brightness electron sources capable of operating at these challenging rates. Among the different technologies pursued, rf guns based on room-temperature structures resonating in the very high frequency (VHF) range (30-300 MHz) and operating in continuous wave successfully demonstrated in the past few years the targeted brightness and reliability. Nonetheless, recently proposed upgrades for x-ray FELs and the always brightness-frontier applications such as UED and UEM are now requiring a further step forward in terms of beam brightness in electron sources. Here, we present a few possible upgrade paths that would allow one to extend, in a relatively simple and cost-effective way, the performance of the present VHF technology to the required new goals.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357
Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 20; Journal Issue: 11; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS
OSTI Identifier:
1410406
Alternate Identifier(s):
OSTI ID: 1417618; OSTI ID: 1419936

Sannibale, F., Filippetto, D., Johnson, M., Li, D., Luo, T., Mitchell, C., Staples, J., Virostek, S., Wells, R., and Byrd, J. M.. Upgrade possibilities for continuous wave rf electron guns based on room-temperature very high frequency technology. United States: N. p., Web. doi:10.1103/PhysRevAccelBeams.20.113402.
Sannibale, F., Filippetto, D., Johnson, M., Li, D., Luo, T., Mitchell, C., Staples, J., Virostek, S., Wells, R., & Byrd, J. M.. Upgrade possibilities for continuous wave rf electron guns based on room-temperature very high frequency technology. United States. doi:10.1103/PhysRevAccelBeams.20.113402.
Sannibale, F., Filippetto, D., Johnson, M., Li, D., Luo, T., Mitchell, C., Staples, J., Virostek, S., Wells, R., and Byrd, J. M.. 2017. "Upgrade possibilities for continuous wave rf electron guns based on room-temperature very high frequency technology". United States. doi:10.1103/PhysRevAccelBeams.20.113402.
@article{osti_1410406,
title = {Upgrade possibilities for continuous wave rf electron guns based on room-temperature very high frequency technology},
author = {Sannibale, F. and Filippetto, D. and Johnson, M. and Li, D. and Luo, T. and Mitchell, C. and Staples, J. and Virostek, S. and Wells, R. and Byrd, J. M.},
abstractNote = {The past decade was characterized by an increasing scientific demand for extending towards higher repetition rates (MHz class and beyond) the performance of already operating lower repetition rate accelerator-based instruments such as x-ray free electron lasers (FELs) and ultrafast electron diffraction (UED) and microscopy (UEM) instruments. Such a need stimulated a worldwide spread of a vibrant R & D activity targeting the development of high-brightness electron sources capable of operating at these challenging rates. Among the different technologies pursued, rf guns based on room-temperature structures resonating in the very high frequency (VHF) range (30-300 MHz) and operating in continuous wave successfully demonstrated in the past few years the targeted brightness and reliability. Nonetheless, recently proposed upgrades for x-ray FELs and the always brightness-frontier applications such as UED and UEM are now requiring a further step forward in terms of beam brightness in electron sources. Here, we present a few possible upgrade paths that would allow one to extend, in a relatively simple and cost-effective way, the performance of the present VHF technology to the required new goals.},
doi = {10.1103/PhysRevAccelBeams.20.113402},
journal = {Physical Review Accelerators and Beams},
number = 11,
volume = 20,
place = {United States},
year = {2017},
month = {11}
}