Title: High field hybrid photoinjector electron source for advanced light source applications

Abstract

The production of high spectral brilliance radiation from electron beam sources depends critically on the electron beam qualities. One must obtain very high electron beam brightness, implying simultaneous high peak current and low emittance. These attributes are enabled through the use of very high field acceleration in a radio-frequency (rf) photoinjector source. Despite the high fields currently utilized, there is a limit on the achievable peak current in high brightness operation, in the range of tens of Ampere. This limitation can be overcome by the use of a hybrid standing wave/traveling wave structure; the standing wave portion provides acceleration at a high field from the photocathode, while the traveling wave part yields strong velocity bunching. This approach is explored here in a C-band scenario, at field strengths (> 100 MV / m) at the current state-of-the-art. It is found that one may arrive at an electron beam with many hundreds of Amperes with well-sub-micron normalized emittance. This extremely compact injector system also possesses attractive simplification of the rf distribution system by eliminating the need for an rf circulator. We explore the use of this device in a compact 400 MeV-class source, driving both inverse Compton scattering and free-electron laser radiationmore » sources with unique, attractive properties.« less

Authors:

Faillace, L. ;

• Search DOE PAGES for author "Faillace, L."
• Search DOE PAGES for ORCID "0000-0002-1305-6201"

Agustsson, R.; Behtouei, M. ;

• Search DOE PAGES for author "Behtouei, M."
• Search DOE PAGES for ORCID "0000-0003-4423-2885"

Bosco, F.; Bruhwiler, D.; Camacho, O.; Carillo, M.; Fukasawa, A. ;

• Search DOE PAGES for author "Fukasawa, A."
• Search DOE PAGES for ORCID "0000-0003-4215-9266"

Gadjev, I.; Giribono, A.; Giuliano, L. ;

• Search DOE PAGES for author "Giuliano, L."
• Search DOE PAGES for ORCID "0000-0002-5326-1971"

Kutsaev, S. ;

• Search DOE PAGES for author "Kutsaev, S."
• Search DOE PAGES for ORCID "0000-0003-4996-2545"

Majernik, N.; Migliorati, M.; Mostacci, A.; Murokh, A.; Palumbo, L.; Spataro, B. ;

• Search DOE PAGES for author "Spataro, B."
• Search DOE PAGES for ORCID "0000-0002-3036-2657"

Tantawi, S.; Vaccarezza, C. more »; Williams, O.; Rosenzweig, J. B.

• Search DOE PAGES for author "Rosenzweig, J. B."
• Search DOE PAGES for ORCID "0000-0001-7798-7753"

« less

Publication Date:

Fri Jun 03 00:00:00 EDT 2022

Research Org.:

SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Org.:

USDOE; Defense Advanced Research Projects Agency (DARPA); National Science Foundation (NSF)

OSTI Identifier:

1871075

Alternate Identifier(s):

OSTI ID: 1876896

Grant/Contract Number:  

SC0009914; SC0020409; AC02-76SF00515

Resource Type:

Published Article

Journal Name:

Physical Review Accelerators and Beams

Additional Journal Information:

Journal Name: Physical Review Accelerators and Beams Journal Volume: 25 Journal Issue: 6; Journal ID: ISSN 2469-9888

Publisher:

American Physical Society

Country of Publication:

United States

Language:

English

Subject:

43 PARTICLE ACCELERATORS; electron emission; room temperature RF; cavity resonators; particle accelerators; accelerators & beams