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Title: High flux femtosecond x-ray emission from the electron-hose instability in laser wakefield accelerators

Abstract

Here, bright and ultrashort duration x-ray pulses can be produced by through betatron oscillations of electrons during laser wakefield acceleration (LWFA). Our experimental measurements using the Hercules laser system demonstrate a dramatic increase in x-ray flux for interaction distances beyond the depletion/dephasing lengths, where the initial electron bunch injected into the first wake bucket catches up with the laser pulse front and the laser pulse depletes. A transition from an LWFA regime to a beam-driven plasma wakefield acceleration regime consequently occurs. The drive electron bunch is susceptible to the electron-hose instability and rapidly develops large amplitude oscillations in its tail, which leads to greatly enhanced x-ray radiation emission. We measure the x-ray flux as a function of acceleration length using a variable length gas cell. 3D particle-in-cell simulations using a Monte Carlo synchrotron x-ray emission algorithm elucidate the time-dependent variations in the radiation emission processes.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3]
  1. Princeton Univ., Princeton, NJ (United States). Princeton Plasma Physics Lab.; Univ. of Michigan, Ann Arbor, MI (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States); Lancaster Univ., Lancaster (United Kingdom)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1434406
Alternate Identifier(s):
OSTI ID: 1436752
Grant/Contract Number:
NA0002372; 1054164; FA9550-12-1-0310
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 21; Journal Issue: 4; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Dong, C. F., Zhao, T. Z., Behm, K., Cummings, P. G., Nees, J., Maksimchuk, A., Yanovsky, V., Krushelnick, K., and Thomas, A. G. R. High flux femtosecond x-ray emission from the electron-hose instability in laser wakefield accelerators. United States: N. p., 2018. Web. doi:10.1103/PhysRevAccelBeams.21.041303.
Dong, C. F., Zhao, T. Z., Behm, K., Cummings, P. G., Nees, J., Maksimchuk, A., Yanovsky, V., Krushelnick, K., & Thomas, A. G. R. High flux femtosecond x-ray emission from the electron-hose instability in laser wakefield accelerators. United States. doi:10.1103/PhysRevAccelBeams.21.041303.
Dong, C. F., Zhao, T. Z., Behm, K., Cummings, P. G., Nees, J., Maksimchuk, A., Yanovsky, V., Krushelnick, K., and Thomas, A. G. R. Tue . "High flux femtosecond x-ray emission from the electron-hose instability in laser wakefield accelerators". United States. doi:10.1103/PhysRevAccelBeams.21.041303.
@article{osti_1434406,
title = {High flux femtosecond x-ray emission from the electron-hose instability in laser wakefield accelerators},
author = {Dong, C. F. and Zhao, T. Z. and Behm, K. and Cummings, P. G. and Nees, J. and Maksimchuk, A. and Yanovsky, V. and Krushelnick, K. and Thomas, A. G. R.},
abstractNote = {Here, bright and ultrashort duration x-ray pulses can be produced by through betatron oscillations of electrons during laser wakefield acceleration (LWFA). Our experimental measurements using the Hercules laser system demonstrate a dramatic increase in x-ray flux for interaction distances beyond the depletion/dephasing lengths, where the initial electron bunch injected into the first wake bucket catches up with the laser pulse front and the laser pulse depletes. A transition from an LWFA regime to a beam-driven plasma wakefield acceleration regime consequently occurs. The drive electron bunch is susceptible to the electron-hose instability and rapidly develops large amplitude oscillations in its tail, which leads to greatly enhanced x-ray radiation emission. We measure the x-ray flux as a function of acceleration length using a variable length gas cell. 3D particle-in-cell simulations using a Monte Carlo synchrotron x-ray emission algorithm elucidate the time-dependent variations in the radiation emission processes.},
doi = {10.1103/PhysRevAccelBeams.21.041303},
journal = {Physical Review Accelerators and Beams},
number = 4,
volume = 21,
place = {United States},
year = {Tue Apr 24 00:00:00 EDT 2018},
month = {Tue Apr 24 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevAccelBeams.21.041303

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