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Title: Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses

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 × 1 0 18 W / cm 2 are focused into plasmas with electron densities of ~ 1 × 1 0 19 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
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [4] ;  [5] ;  [3] ;  [1] ;  [1] ;  [6] ;  [7] ;  [5] ;  [4] ;  [1] ;  [3]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering
  3. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Lawrence Berkeley National Lab. (LBNL) and Univ. of California, Berkeley, CA (United States)
  6. Univ. of Lisbon (Portugal). Inst. of Plasma and Nuclear Fusion
  7. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering; Univ. of Lisbon (Portugal). Inst. of Plasma and Nuclear Fusion
Publication Date:
Report Number(s):
LLNL-JRNL-701573
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1702739
Grant/Contract Number:
AC02-76SF00515; AC52-07NA27344; AC02-05CH11231; NA0002950; FWP 100182
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 13; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 43 PARTICLE ACCELERATORS
OSTI Identifier:
1361074
Alternate Identifier(s):
OSTI ID: 1349547; OSTI ID: 1361583; OSTI ID: 1364532; OSTI ID: 1379784

Albert, F., Lemos, N., Shaw, J. L., Pollock, B. B., Goyon, C., Schumaker, W., Saunders, A. M., Marsh, K. A., Pak, A., Ralph, J. E., Martins, J. L., Amorim, L. D., Falcone, R. W., Glenzer, S. H., Moody, J. D., and Joshi, C.. Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses. United States: N. p., Web. doi:10.1103/PhysRevLett.118.134801.
Albert, F., Lemos, N., Shaw, J. L., Pollock, B. B., Goyon, C., Schumaker, W., Saunders, A. M., Marsh, K. A., Pak, A., Ralph, J. E., Martins, J. L., Amorim, L. D., Falcone, R. W., Glenzer, S. H., Moody, J. D., & Joshi, C.. Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses. United States. doi:10.1103/PhysRevLett.118.134801.
Albert, F., Lemos, N., Shaw, J. L., Pollock, B. B., Goyon, C., Schumaker, W., Saunders, A. M., Marsh, K. A., Pak, A., Ralph, J. E., Martins, J. L., Amorim, L. D., Falcone, R. W., Glenzer, S. H., Moody, J. D., and Joshi, C.. 2017. "Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses". United States. doi:10.1103/PhysRevLett.118.134801. https://www.osti.gov/servlets/purl/1361074.
@article{osti_1361074,
title = {Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses},
author = {Albert, F. and Lemos, N. and Shaw, J. L. and Pollock, B. B. and Goyon, C. and Schumaker, W. and Saunders, A. M. and Marsh, K. A. and Pak, A. and Ralph, J. E. and Martins, J. L. and Amorim, L. D. and Falcone, R. W. and Glenzer, S. H. and Moody, J. D. and Joshi, C.},
abstractNote = {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 × 1 0 18 W / cm 2 are focused into plasmas with electron densities of ~ 1 × 1 0 19 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},
doi = {10.1103/PhysRevLett.118.134801},
journal = {Physical Review Letters},
number = 13,
volume = 118,
place = {United States},
year = {2017},
month = {3}
}