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

Journal Article · · Physical Review Letters
 [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

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

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Grant/Contract Number:
AC02-76SF00515; AC52-07NA27344; AC02-05CH11231; NA0002950
OSTI ID:
1361074
Alternate ID(s):
OSTI ID: 1349547
OSTI ID: 1361583
OSTI ID: 1364532
OSTI ID: 1379784
Report Number(s):
LLNL-JRNL--701573
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 118; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Betatron x-ray radiation from laser-plasma accelerators driven by femtosecond and picosecond laser systems journal May 2018
X-ray analysis methods for sources from self-modulated laser wakefield acceleration driven by picosecond lasers journal March 2019
X-ray sources using a picosecond laser driven plasma accelerator journal August 2019
Characterization of high spatial resolution lithium fluoride X-ray detectors journal June 2019
Simulation study of CO 2 laser-plasma interactions and self-modulated wakefield acceleration journal August 2019
High-resolution μCT of a mouse embryo using a compact laser-driven X-ray betatron source journal June 2018
Extremely intense laser-based electron acceleration in a plasma channel journal January 2018
Experimental signatures of direct-laser-acceleration-assisted laser wakefield acceleration journal February 2018
Bremsstrahlung hard x-ray source driven by an electron beam from a self-modulated laser wakefield accelerator journal March 2018
All-optical generation of petawatt gamma radiation via inverse Compton scattering from laser interaction with tube target journal June 2019
Betatron x-ray radiation in the self-modulated laser wakefield acceleration regime: prospects for a novel probe at large scale laser facilities journal December 2018
High-resolution μCT of a mouse embryo using a compact laser-driven X-ray betatron source text January 2018

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