Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging
Abstract
Here, the recent combination of ultra-intense lasers and laser-accelerated electron beams is enabling the development of a new generation of compact x-ray light sources, the coherence of which depends directly on electron beam emittance. Although the emittance of accelerated electron beams can be low, it can grow due to the effects of space charge during free-space propagation. Direct experimental measurement of this important property is complicated by micron-scale beam sizes, and the presence of intense fields at the location where space charge acts. Reported here is a novel, non-destructive, single-shot method that overcame this problem. It employed an intense laser probe pulse, and spectroscopic imaging of the inverse-Compton scattered x-rays, allowing measurement of an ultra-low value for the normalized transverse emittance, 0.15 (±0.06) π mm mrad, as well as study of its subsequent growth upon exiting the accelerator. The technique and results are critical for designing multi-stage laser-wakefield accelerators, and generating high-brightness, spatially coherent x-rays.
- Authors:
-
- Univ. of Nebraska, Lincoln, NE (United States)
- Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab. (RAL)
- Publication Date:
- Research Org.:
- Univ. of Nebraska, Lincoln, NE (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- OSTI Identifier:
- 1257818
- Grant/Contract Number:
- FG02-05ER15663
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; high-field lasers; laser-produced plasmas; ultrafast lasers; X-rays
Citation Formats
Golovin, G., Banerjee, S., Liu, C., Chen, S., Zhang, J., Zhao, B., Zhang, P., Veale, M., Wilson, M., Seller, P., and Umstadter, D. Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging. United States: N. p., 2016.
Web. doi:10.1038/srep24622.
Golovin, G., Banerjee, S., Liu, C., Chen, S., Zhang, J., Zhao, B., Zhang, P., Veale, M., Wilson, M., Seller, P., & Umstadter, D. Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging. United States. doi:10.1038/srep24622.
Golovin, G., Banerjee, S., Liu, C., Chen, S., Zhang, J., Zhao, B., Zhang, P., Veale, M., Wilson, M., Seller, P., and Umstadter, D. Tue .
"Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging". United States. doi:10.1038/srep24622. https://www.osti.gov/servlets/purl/1257818.
@article{osti_1257818,
title = {Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging},
author = {Golovin, G. and Banerjee, S. and Liu, C. and Chen, S. and Zhang, J. and Zhao, B. and Zhang, P. and Veale, M. and Wilson, M. and Seller, P. and Umstadter, D.},
abstractNote = {Here, the recent combination of ultra-intense lasers and laser-accelerated electron beams is enabling the development of a new generation of compact x-ray light sources, the coherence of which depends directly on electron beam emittance. Although the emittance of accelerated electron beams can be low, it can grow due to the effects of space charge during free-space propagation. Direct experimental measurement of this important property is complicated by micron-scale beam sizes, and the presence of intense fields at the location where space charge acts. Reported here is a novel, non-destructive, single-shot method that overcame this problem. It employed an intense laser probe pulse, and spectroscopic imaging of the inverse-Compton scattered x-rays, allowing measurement of an ultra-low value for the normalized transverse emittance, 0.15 (±0.06) π mm mrad, as well as study of its subsequent growth upon exiting the accelerator. The technique and results are critical for designing multi-stage laser-wakefield accelerators, and generating high-brightness, spatially coherent x-rays.},
doi = {10.1038/srep24622},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {2016},
month = {4}
}
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