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Implementation of a Wollaston interferometry diagnostic on OMEGA EP

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.5036956· OSTI ID:1468612
 [1];  [2];  [2];  [2];  [2]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Laboratory for Laser Energetics, University of Rochester
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Here, a Wollaston interferometer is presented for use in measuring the electron density of plasma plumes created in experiments on the OMEGA EP laser system. The diagnostic is installed as an additional arm on the 4ω probe system, a suite of diagnostics that share a 10 ps pulse of 263 nm laser light captured by an imaging system at f/4. The interferometer utilizes a Wollaston prism to create two angularly separated beams from a single input probe beam, split at any angle between 0° and 90°. This configuration is implemented uniquely such that fringe spacing may be altered independently of field of view, magnification, and imaging resolution, from a range of 17 to 76 μm/fringe. The region of overlap between the two beams forms a total field of view of approximately 1.2 × 1.6 mm at the target chamber center with an imaging resolution of 5 μm. Using this configuration, here it is shown that plasma density may be accurately characterized over a range of 3 × 1018–1 × 1020 cm-3.

Research Organization:
Univ. of Rochester, NY (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001944
OSTI ID:
1468612
Alternate ID(s):
OSTI ID: 1462590
Report Number(s):
2017--263, 2389; 2017-263, 1431, 2389
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 89; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (10)

Inertial-confinement fusion with lasers journal May 2016
Polarized light interferometer for laser fusion studies journal December 1979
Optical diagnostic suite (schlieren, interferometry, and grid image refractometry) on OMEGA EP using a 10-ps, 263-nm probe beam journal October 2012
Measured hot-electron intensity thresholds quantified by a two-plasmon-decay resonant common-wave gain in various experimental configurations journal May 2013
Measurements of electron density profiles using an angular filter refractometer journal May 2014
Angular filter refractometry analysis using simulated annealing journal October 2017
Single Beam Schlieren Interferometer Using a Wollaston Prism journal January 1972
Application of a Simple Differential Interferometer to High Current Arc Discharges journal January 1974
Abel inversion using fast Fourier transforms journal January 1988
Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry journal January 1982

Cited By (1)

Plasma Density Measurements of the Inner Shell Release journal December 2019

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