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Title: 10 and 5 {mu}m pinhole-assisted point-projection backlit imaging for the National Ignition Facility

Abstract

In pinhole-assisted point-projection backlighting, pinholes are placed a small distance (of order 1 mm) away from the backlighter source to produce images with large field of view. Pinholes placed close to high-power backlighter sources can vaporize and, if sufficiently small, close due to x-ray driven ablation, thereby potentially limiting the usefulness of this method. A study of streaked one-dimensional backlit imaging of 25 {mu}m W wires using the OMEGA laser at the University of Rochester is presented. The pinhole closure time scale for 10 {mu}m pinholes placed 0.45 and 1 mm distant from a 0.6 TW Ti backlighter is 1.3 and 2.2 ns, respectively. Similar time scales for 5 {mu}m pinholes is also presented. Successful wire imaging prior to pinhole closure is clearly demonstrated.

Authors:
; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40204797
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 72; Journal Issue: 1; Other Information: Othernumber: RSINAK000072000001000690000001; 574101CON; PBD: Jan 2001; Journal ID: ISSN 0034-6748
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; CLOSURES; LASERS; PHYSICS; US NATIONAL IGNITION FACILITY

Citation Formats

Bullock, A B, Landen, O L, and Bradley, D K. 10 and 5 {mu}m pinhole-assisted point-projection backlit imaging for the National Ignition Facility. United States: N. p., 2001. Web. doi:10.1063/1.1318253.
Bullock, A B, Landen, O L, & Bradley, D K. 10 and 5 {mu}m pinhole-assisted point-projection backlit imaging for the National Ignition Facility. United States. https://doi.org/10.1063/1.1318253
Bullock, A B, Landen, O L, and Bradley, D K. 2001. "10 and 5 {mu}m pinhole-assisted point-projection backlit imaging for the National Ignition Facility". United States. https://doi.org/10.1063/1.1318253.
@article{osti_40204797,
title = {10 and 5 {mu}m pinhole-assisted point-projection backlit imaging for the National Ignition Facility},
author = {Bullock, A B and Landen, O L and Bradley, D K},
abstractNote = {In pinhole-assisted point-projection backlighting, pinholes are placed a small distance (of order 1 mm) away from the backlighter source to produce images with large field of view. Pinholes placed close to high-power backlighter sources can vaporize and, if sufficiently small, close due to x-ray driven ablation, thereby potentially limiting the usefulness of this method. A study of streaked one-dimensional backlit imaging of 25 {mu}m W wires using the OMEGA laser at the University of Rochester is presented. The pinhole closure time scale for 10 {mu}m pinholes placed 0.45 and 1 mm distant from a 0.6 TW Ti backlighter is 1.3 and 2.2 ns, respectively. Similar time scales for 5 {mu}m pinholes is also presented. Successful wire imaging prior to pinhole closure is clearly demonstrated.},
doi = {10.1063/1.1318253},
url = {https://www.osti.gov/biblio/40204797}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 1,
volume = 72,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}