skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Properties of laser-produced GaAs plasmas measured from highly resolved X-ray line shapes and ratios

Journal Article · · High Energy Density Physics
 [1];  [2];  [3];  [4];  [4];  [4];  [4];  [5];  [5];  [1]
  1. Artep Inc., Ellicott City, MD (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. General Atomics, San Diego, CA (United States)
  4. Univ. of Michigan, Ann Arbor, MI (United States)
  5. National Inst. of Standards and Technology, Gaithersburg, MD (United States)
+ Show Author Affiliations

The properties of hot, dense plasmas generated by the irradiation of GaAs targets by the Titan laser at Lawrence Livermore National Laboratory were determined by the analysis of high resolution K shell spectra in the 9 keV to 11 keV range. The laser parameters, such as relatively long pulse duration and large focal spot, were chosen to produce a steady-state plasma with minimal edge gradients, and the time-integrated spectra were compared to non-LTE steady state spectrum simulations using the FLYCHK and NOMAD codes. The bulk plasma streaming velocity was measured from the energy shifts of the Ga He-like transitions and Li-like dielectronic satellites. The electron density and the electron energy distribution, both the thermal and the hot non-thermal components, were determined from the spectral line ratios. After accounting for the spectral line broadening contributions, the plasma turbulent motion was measured from the residual line widths. The ionization balance was determined from the ratios of the He-like through F-like spectral features. The detailed comparison of the experimental Ga spectrum and the spectrum simulated by the FLYCHK code indicates two significant discrepancies, the transition energy of a Li-like dielectronic satellite (designated t) and the calculated intensity of a He-like line (x), that should lead to improvements in the kinetics codes used to simulate the X-ray spectra from highly-charged ions.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); Defense Threat Reduction Agency (DTRA)
Grant/Contract Number:
AC04-94AL85000; NA0001840; DTRA-1-10-0077
OSTI ID:
1485819
Report Number(s):
SAND-2018-13086J; 669969
Journal Information:
High Energy Density Physics, Vol. 26, Issue C; ISSN 1574-1818
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Figures / Tables (10)

Table 1(p. 11)table Table 1
Table 2(p. 12)table Table 2
Fig. 1.(p. 14)figure Fig. 1.
Fig. 2.(p. 15)figure Fig. 2.
Fig. 3.(p. 16)figure Fig. 3.
Fig. 4.(p. 17)figure Fig. 4.
Fig. 5.(p. 18)figure Fig. 5.
Fig. 6.(p. 19)figure Fig. 6.
Fig. 7.(p. 20)figure Fig. 7.
Fig. 8.(p. 21)figure Fig. 8.

Similar Records

X-ray Spectral Measurements and Collisional Radiative Modeling of Hot, High-Z Plasmas at the Omega Laser
Journal Article · Wed Feb 20 00:00:00 EST 2008 · High Energy Density Physics, vol. 4, N/A, June 1, 2008, pp. 78 · OSTI ID:1485819
+4 more
X-ray Spectral Measurements and Collisional Radiative Modeling of Hot, Gold Plasmas at the Omega Laser
Journal Article · Wed Jul 02 00:00:00 EDT 2008 · High Energy Density Physics, vol. 4, N/A, July 1, 2008, pp. 78-87 · OSTI ID:1485819
+4 more
Krypton K-Shell X-Ray Spectra Recorded by the HENEX Spectrometer
Technical Report · Tue Jan 04 00:00:00 EST 2005 · OSTI ID:1485819
+7 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
X-ray spectroscopy
Plasma diagnostics
Laser-produced plasmas
Hard X-ray spectra