Performance of a first generation X-band photoelectron rf gun
Abstract
Building more compact accelerators to deliver high brightness electron beams for the generation of high flux, highly coherent radiation is a priority for the photon science community. A relatively straightforward reduction in footprint can be achieved by using high-gradient X-band (11.4 GHz) rf technology. To this end, an X-band injector consisting of a 5.5 cell rf gun and a 1-m long linac has been commissioned at SLAC. It delivers an 85 MeV electron beam with peak brightness somewhat better than that achieved in S-band photoinjectors, such as the one developed for the Linac Coherent Light Source (LCLS). The X-band rf gun operates with up to a 200 MV/m peak field on the cathode, and has been used to produce bunches of a few pC to 1.2 nC in charge. Notably, bunch lengths as short as 120 fs rms have been measured for charges of 5 pC (~3×107 electrons), and normalized transverse emittances as small as 0.22 mm-mrad have been measured for this same charge level. Bunch lengths as short as 400 (250) fs rms have been achieved for electron bunches of 100 (20) pC with transverse normalized emittances of 0.7 (0.35) mm-mrad. As a result, we report on the performancemore »
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1251016
- Alternate Identifier(s):
- OSTI ID: 1251380
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Accelerators and Beams
- Additional Journal Information:
- Journal Volume: 19; Journal Issue: 5; Journal ID: ISSN 2469-9888
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS
Citation Formats
Limborg-Deprey, C., Adolphsen, C., McCormick, D., Dunning, M., Jobe, K., Li, H., Raubenheimer, T., Vrielink, A., Vecchione, T., Wang, F., and Weathersby, S. Performance of a first generation X-band photoelectron rf gun. United States: N. p., 2016.
Web. doi:10.1103/PhysRevAccelBeams.19.053401.
Limborg-Deprey, C., Adolphsen, C., McCormick, D., Dunning, M., Jobe, K., Li, H., Raubenheimer, T., Vrielink, A., Vecchione, T., Wang, F., & Weathersby, S. Performance of a first generation X-band photoelectron rf gun. United States. https://doi.org/10.1103/PhysRevAccelBeams.19.053401
Limborg-Deprey, C., Adolphsen, C., McCormick, D., Dunning, M., Jobe, K., Li, H., Raubenheimer, T., Vrielink, A., Vecchione, T., Wang, F., and Weathersby, S. Wed .
"Performance of a first generation X-band photoelectron rf gun". United States. https://doi.org/10.1103/PhysRevAccelBeams.19.053401.
@article{osti_1251016,
title = {Performance of a first generation X-band photoelectron rf gun},
author = {Limborg-Deprey, C. and Adolphsen, C. and McCormick, D. and Dunning, M. and Jobe, K. and Li, H. and Raubenheimer, T. and Vrielink, A. and Vecchione, T. and Wang, F. and Weathersby, S.},
abstractNote = {Building more compact accelerators to deliver high brightness electron beams for the generation of high flux, highly coherent radiation is a priority for the photon science community. A relatively straightforward reduction in footprint can be achieved by using high-gradient X-band (11.4 GHz) rf technology. To this end, an X-band injector consisting of a 5.5 cell rf gun and a 1-m long linac has been commissioned at SLAC. It delivers an 85 MeV electron beam with peak brightness somewhat better than that achieved in S-band photoinjectors, such as the one developed for the Linac Coherent Light Source (LCLS). The X-band rf gun operates with up to a 200 MV/m peak field on the cathode, and has been used to produce bunches of a few pC to 1.2 nC in charge. Notably, bunch lengths as short as 120 fs rms have been measured for charges of 5 pC (~3×107 electrons), and normalized transverse emittances as small as 0.22 mm-mrad have been measured for this same charge level. Bunch lengths as short as 400 (250) fs rms have been achieved for electron bunches of 100 (20) pC with transverse normalized emittances of 0.7 (0.35) mm-mrad. As a result, we report on the performance and the lessons learned from the operation and optimization of this first generation X-band gun.},
doi = {10.1103/PhysRevAccelBeams.19.053401},
journal = {Physical Review Accelerators and Beams},
number = 5,
volume = 19,
place = {United States},
year = {Wed May 04 00:00:00 EDT 2016},
month = {Wed May 04 00:00:00 EDT 2016}
}
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