Design and application of multimegawatt -band deflectors for femtosecond electron beam diagnostics
Abstract
Performance of the x-ray free electron laser Linac Coherent Light Source (LCLS) and the Facility for Advanced Accelerator Experimental Tests (FACET) is determined by the properties of their extremely short electron bunches. Multi-GeV electron bunches in both LCLS and FACET are less than 100 fs long. Optimization of beam properties and understanding of free-electron laser operation require electron beam diagnostics with time resolution of about 10 fs. We designed, built and commissioned a set of high frequency X-band deflectors which can measure the beam longitudinal space charge distribution and slice energy spread to better than 10 fs resolution at full LCLS energy (14 GeV), and with 70 fs resolution at full FACET energy (20 GeV). Use of high frequency and high gradient in these devices allows them to reach unprecedented performance. We report on the physics motivation, design considerations, operational configuration, cold tests, and typical results of the X-band deflector systems currently in use at SLAC.
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1180097
- Alternate Identifier(s):
- OSTI ID: 1215442
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Special Topics. Accelerators and Beams
- Additional Journal Information:
- Journal Name: Physical Review Special Topics. Accelerators and Beams Journal Volume: 17 Journal Issue: 10; Journal ID: ISSN 1098-4402
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Dolgashev, Valery A., Bowden, Gordon, Ding, Yuantao, Emma, Paul, Krejcik, Patrick, Lewandowski, James, Limborg, Cecile, Litos, Michael, Wang, Juwen, and Xiang, Dao. Design and application of multimegawatt X -band deflectors for femtosecond electron beam diagnostics. United States: N. p., 2014.
Web. doi:10.1103/PhysRevSTAB.17.102801.
Dolgashev, Valery A., Bowden, Gordon, Ding, Yuantao, Emma, Paul, Krejcik, Patrick, Lewandowski, James, Limborg, Cecile, Litos, Michael, Wang, Juwen, & Xiang, Dao. Design and application of multimegawatt X -band deflectors for femtosecond electron beam diagnostics. United States. https://doi.org/10.1103/PhysRevSTAB.17.102801
Dolgashev, Valery A., Bowden, Gordon, Ding, Yuantao, Emma, Paul, Krejcik, Patrick, Lewandowski, James, Limborg, Cecile, Litos, Michael, Wang, Juwen, and Xiang, Dao. Thu .
"Design and application of multimegawatt X -band deflectors for femtosecond electron beam diagnostics". United States. https://doi.org/10.1103/PhysRevSTAB.17.102801.
@article{osti_1180097,
title = {Design and application of multimegawatt X -band deflectors for femtosecond electron beam diagnostics},
author = {Dolgashev, Valery A. and Bowden, Gordon and Ding, Yuantao and Emma, Paul and Krejcik, Patrick and Lewandowski, James and Limborg, Cecile and Litos, Michael and Wang, Juwen and Xiang, Dao},
abstractNote = {Performance of the x-ray free electron laser Linac Coherent Light Source (LCLS) and the Facility for Advanced Accelerator Experimental Tests (FACET) is determined by the properties of their extremely short electron bunches. Multi-GeV electron bunches in both LCLS and FACET are less than 100 fs long. Optimization of beam properties and understanding of free-electron laser operation require electron beam diagnostics with time resolution of about 10 fs. We designed, built and commissioned a set of high frequency X-band deflectors which can measure the beam longitudinal space charge distribution and slice energy spread to better than 10 fs resolution at full LCLS energy (14 GeV), and with 70 fs resolution at full FACET energy (20 GeV). Use of high frequency and high gradient in these devices allows them to reach unprecedented performance. We report on the physics motivation, design considerations, operational configuration, cold tests, and typical results of the X-band deflector systems currently in use at SLAC.},
doi = {10.1103/PhysRevSTAB.17.102801},
journal = {Physical Review Special Topics. Accelerators and Beams},
number = 10,
volume = 17,
place = {United States},
year = {Thu Oct 02 00:00:00 EDT 2014},
month = {Thu Oct 02 00:00:00 EDT 2014}
}
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https://doi.org/10.1103/PhysRevSTAB.17.102801
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Cited by: 19 works
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