Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses
Journal Article
·
· Physical Review Letters
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering
- Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Lawrence Berkeley National Lab. (LBNL) and Univ. of California, Berkeley, CA (United States)
- Univ. of Lisbon (Portugal). Inst. of Plasma and Nuclear Fusion
- Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering; Univ. of Lisbon (Portugal). Inst. of Plasma and Nuclear Fusion
American Physical Society. We investigate a new regime for betatron x-ray emission that utilizes kilojoule-class picosecond lasers to drive wakes in plasmas. When such laser pulses with intensities of ~5×1018 W/cm 2 are focused into plasmas with electron densities of ~1×1019 cm -3 , they undergo self-modulation and channeling, which accelerates electrons up to 200 MeV energies and causes those electrons to emit x rays. The measured x-ray spectra are fit with a synchrotron spectrum with a critical energy of 10-20 keV, and 2D particle-in-cell simulations were used to model the acceleration and radiation of the electrons in our experimental conditions.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- AC02-76SF00515; AC52-07NA27344; AC02-05CH11231; NA0002950; FWP 100182
- OSTI ID:
- 1361074
- Alternate ID(s):
- OSTI ID: 1349547; OSTI ID: 1361583; OSTI ID: 1364532; OSTI ID: 1379784
- Report Number(s):
- LLNL-JRNL-701573; PRLTAO; TRN: US1702739
- Journal Information:
- Physical Review Letters, Vol. 118, Issue 13; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 43 works
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