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Title: Ultraintense laser interaction with nanoscale target: a simple model for layer expansion and ion acceleration

Abstract

A simple model has been derived for the expansion of a thin (up to 100s of nm thickness), solid-density target driven by an u.ltraintense laser. In this regime, new ion acceleration mechanisms, such as the Break-Out Afterburner (BOA) [1], emerge with the potential to dramatically improve energy, efficiency, and energy spread of laser-driven ion beams. Such beams have been proposed [2] as drivers for fast ignition inertial confinement fusion [3]. Analysis of kinetic simulations of the BOA shows two dislinct times that bound the period of enhanced acceleration: t{sub 1}, when the target becomes relativistically transparent to the laser, and t{sub 2}, when the target becomes classically underdense and the enhanced acceleration terminates. A silllple dynamical model for target expansion has been derived that contains both the early, one-dimensional (lD) expansion of the target as well as three-dimensional (3D) expansion of the plasma at late times, The model assumes that expansion is slab-like at the instantaneous ion sound speed and requires as input target composition, laser intensity, laser spot area, and the efficiency of laser absorption into electron thermal energy.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3];  [2]
  1. Los Alamos National Laboratory
  2. GERMANY
  3. JAEA, KYOTO, JAPAN
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
974297
Report Number(s):
LA-UR-09-07049; LA-UR-09-7049
TRN: US1002267
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: Inertial Fusion Science and Applications conference ; September 6, 2009 ; San Francisco, CA
Country of Publication:
United States
Language:
English
Subject:
70; ABSORPTION; ACCELERATION; AFTERBURNERS; EFFICIENCY; ELECTRONS; IGNITION; INERTIAL CONFINEMENT; ION BEAMS; KINETICS; LASERS; PLASMA; TARGETS; THICKNESS; VELOCITY

Citation Formats

Albright, Brian J, Yin, Lin, Hegelich, Bjoorn M, Bowers, Kevin J, Huang, Chengkun, Fernandez, Juan C, Flippo, Kirk A, Gaillard, Sandrine, Kwan, Thomas J T, Henig, Andreas, Yan, Xue Q, Tajima, Toshi, and Habs, Dieter. Ultraintense laser interaction with nanoscale target: a simple model for layer expansion and ion acceleration. United States: N. p., 2009. Web.
Albright, Brian J, Yin, Lin, Hegelich, Bjoorn M, Bowers, Kevin J, Huang, Chengkun, Fernandez, Juan C, Flippo, Kirk A, Gaillard, Sandrine, Kwan, Thomas J T, Henig, Andreas, Yan, Xue Q, Tajima, Toshi, & Habs, Dieter. Ultraintense laser interaction with nanoscale target: a simple model for layer expansion and ion acceleration. United States.
Albright, Brian J, Yin, Lin, Hegelich, Bjoorn M, Bowers, Kevin J, Huang, Chengkun, Fernandez, Juan C, Flippo, Kirk A, Gaillard, Sandrine, Kwan, Thomas J T, Henig, Andreas, Yan, Xue Q, Tajima, Toshi, and Habs, Dieter. Thu . "Ultraintense laser interaction with nanoscale target: a simple model for layer expansion and ion acceleration". United States. https://www.osti.gov/servlets/purl/974297.
@article{osti_974297,
title = {Ultraintense laser interaction with nanoscale target: a simple model for layer expansion and ion acceleration},
author = {Albright, Brian J and Yin, Lin and Hegelich, Bjoorn M and Bowers, Kevin J and Huang, Chengkun and Fernandez, Juan C and Flippo, Kirk A and Gaillard, Sandrine and Kwan, Thomas J T and Henig, Andreas and Yan, Xue Q and Tajima, Toshi and Habs, Dieter},
abstractNote = {A simple model has been derived for the expansion of a thin (up to 100s of nm thickness), solid-density target driven by an u.ltraintense laser. In this regime, new ion acceleration mechanisms, such as the Break-Out Afterburner (BOA) [1], emerge with the potential to dramatically improve energy, efficiency, and energy spread of laser-driven ion beams. Such beams have been proposed [2] as drivers for fast ignition inertial confinement fusion [3]. Analysis of kinetic simulations of the BOA shows two dislinct times that bound the period of enhanced acceleration: t{sub 1}, when the target becomes relativistically transparent to the laser, and t{sub 2}, when the target becomes classically underdense and the enhanced acceleration terminates. A silllple dynamical model for target expansion has been derived that contains both the early, one-dimensional (lD) expansion of the target as well as three-dimensional (3D) expansion of the plasma at late times, The model assumes that expansion is slab-like at the instantaneous ion sound speed and requires as input target composition, laser intensity, laser spot area, and the efficiency of laser absorption into electron thermal energy.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {1}
}

Conference:
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