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Title: High energy electrons, positrons and photonuclear reactions in petawatt laser-solid experiments

Abstract

The Petawatt laser at LLNL has opened a new regime of high-energy laser-matter interactions in which the quiver motion of plasma electrons is fully relativistic with energies extending well above the threshold for nuclear processes. We have observed that, in addition to the large flux of several MeV electrons ponderomotively expelled from the ultra-intense laser focus, there is a high energy component of electrons extending to -100 MeV, apparently from relativistic self-focusing and plasma acceleration in the underdense pre-formed plasma. The generation of hard bremsstrahlung cascade as these electrons traverse the solid target material, and the resulting photo-nuclear reactions, nuclear fission, and positron-electron pair production are described.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15004763
Report Number(s):
UCRL-JC-137797
TRN: US200321%%50
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Joint Institute for Fusion Theory, Livermore, CA (US), 11/23/1998--11/24/1998; Other Information: PBD: 9 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; BREMSSTRAHLUNG; ELECTRONS; FISSION; LASERS; LAWRENCE LIVERMORE NATIONAL LABORATORY; PAIR PRODUCTION; PETAWATT POWER RANGE; PHOTONUCLEAR REACTIONS; PLASMA; PLASMA ACCELERATION; POSITRONS; TARGETS

Citation Formats

Cowan, T E, Hunt, A W, Johnson, J, Perry, M D, Fountain, W, Hatchett, S, Key, M H, Kuehl, T, , Parnell, T, Pennington, D M, Phillips, T W, Roth, M, Takahashi, Y, and Wilks, S C. High energy electrons, positrons and photonuclear reactions in petawatt laser-solid experiments. United States: N. p., 1999. Web. doi:10.1007/978-1-4615-1299-8_11.
Cowan, T E, Hunt, A W, Johnson, J, Perry, M D, Fountain, W, Hatchett, S, Key, M H, Kuehl, T, , Parnell, T, Pennington, D M, Phillips, T W, Roth, M, Takahashi, Y, & Wilks, S C. High energy electrons, positrons and photonuclear reactions in petawatt laser-solid experiments. United States. doi:10.1007/978-1-4615-1299-8_11.
Cowan, T E, Hunt, A W, Johnson, J, Perry, M D, Fountain, W, Hatchett, S, Key, M H, Kuehl, T, , Parnell, T, Pennington, D M, Phillips, T W, Roth, M, Takahashi, Y, and Wilks, S C. Thu . "High energy electrons, positrons and photonuclear reactions in petawatt laser-solid experiments". United States. doi:10.1007/978-1-4615-1299-8_11. https://www.osti.gov/servlets/purl/15004763.
@article{osti_15004763,
title = {High energy electrons, positrons and photonuclear reactions in petawatt laser-solid experiments},
author = {Cowan, T E and Hunt, A W and Johnson, J and Perry, M D and Fountain, W and Hatchett, S and Key, M H and Kuehl, T and and Parnell, T and Pennington, D M and Phillips, T W and Roth, M and Takahashi, Y and Wilks, S C},
abstractNote = {The Petawatt laser at LLNL has opened a new regime of high-energy laser-matter interactions in which the quiver motion of plasma electrons is fully relativistic with energies extending well above the threshold for nuclear processes. We have observed that, in addition to the large flux of several MeV electrons ponderomotively expelled from the ultra-intense laser focus, there is a high energy component of electrons extending to -100 MeV, apparently from relativistic self-focusing and plasma acceleration in the underdense pre-formed plasma. The generation of hard bremsstrahlung cascade as these electrons traverse the solid target material, and the resulting photo-nuclear reactions, nuclear fission, and positron-electron pair production are described.},
doi = {10.1007/978-1-4615-1299-8_11},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}

Conference:
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