Laser-driven micro-Coulomb charge movement and energy conversion to relativistic electrons
Abstract
Development of robust instrumentation has shown evidence for a multi-μC expulsion of relativistic electrons from a sub-μm-thick foil, laser illuminated with 60–70 J on target at 2 × 1020 W/cm2. From previous work and with electron spectroscopy, it is seen that an exponential electron energy distribution is accurate enough to calculate the emitted electron charge and energy content. The 5–10-μC charge for the >100-TW Trident Laser represents the first active measurement of the >50% laser-light-to-electron conversion efficiency. By shorting out the TV/m electric field usually associated with accelerating multi-MeV ions from such targets, one finds that this charge is representative of a multi-MA current of relativistic electrons for diverse applications from electron fast ignition to advanced radiography concepts. Also included with the details of the discoveries of this research, shortcomings of the diagnostics and means of improving their fidelity are discussed.
- Authors:
-
[1];
[3];
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sigma Labs, Inc., Santa Fe, NM (United States)
- Inst. of Physics of the ASCR, Prague (Czech Republic)
- Queen's Univ. of Belfast (United Kingdom)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1499338
- Report Number(s):
- LA-UR-16-22891
Journal ID: ISSN 1070-664X
- Grant/Contract Number:
- 89233218CNA000001; AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 23; Journal Issue: 9; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Cobble, J. A., Palaniyappan, S., Johnson, R. P., Shimada, T., Huang, C., Gautier, D. C., Clark, D. D., Falk, K., and Jung, D. Laser-driven micro-Coulomb charge movement and energy conversion to relativistic electrons. United States: N. p., 2016.
Web. doi:10.1063/1.4962518.
Cobble, J. A., Palaniyappan, S., Johnson, R. P., Shimada, T., Huang, C., Gautier, D. C., Clark, D. D., Falk, K., & Jung, D. Laser-driven micro-Coulomb charge movement and energy conversion to relativistic electrons. United States. https://doi.org/10.1063/1.4962518
Cobble, J. A., Palaniyappan, S., Johnson, R. P., Shimada, T., Huang, C., Gautier, D. C., Clark, D. D., Falk, K., and Jung, D. Tue .
"Laser-driven micro-Coulomb charge movement and energy conversion to relativistic electrons". United States. https://doi.org/10.1063/1.4962518. https://www.osti.gov/servlets/purl/1499338.
@article{osti_1499338,
title = {Laser-driven micro-Coulomb charge movement and energy conversion to relativistic electrons},
author = {Cobble, J. A. and Palaniyappan, S. and Johnson, R. P. and Shimada, T. and Huang, C. and Gautier, D. C. and Clark, D. D. and Falk, K. and Jung, D.},
abstractNote = {Development of robust instrumentation has shown evidence for a multi-μC expulsion of relativistic electrons from a sub-μm-thick foil, laser illuminated with 60–70 J on target at 2 × 1020 W/cm2. From previous work and with electron spectroscopy, it is seen that an exponential electron energy distribution is accurate enough to calculate the emitted electron charge and energy content. The 5–10-μC charge for the >100-TW Trident Laser represents the first active measurement of the >50% laser-light-to-electron conversion efficiency. By shorting out the TV/m electric field usually associated with accelerating multi-MeV ions from such targets, one finds that this charge is representative of a multi-MA current of relativistic electrons for diverse applications from electron fast ignition to advanced radiography concepts. Also included with the details of the discoveries of this research, shortcomings of the diagnostics and means of improving their fidelity are discussed.},
doi = {10.1063/1.4962518},
journal = {Physics of Plasmas},
number = 9,
volume = 23,
place = {United States},
year = {Tue Sep 20 00:00:00 EDT 2016},
month = {Tue Sep 20 00:00:00 EDT 2016}
}
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