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Title: Use of a near back-scattering imaging system on the National Ignition Facility

Abstract

A near back-scattering imaging diagnostic system has been implemented, qualified and fielded on the first quad of beams on the National Ignition Facility. This diagnostic images diffusing scatter plates, placed around the final focus lenses on the NIF target chamber, to quantitatively measure the fraction of light back-scattered outside of the incident cone of the focusing optics. The imaging system consists of a wide-angle lens coupled to a gated CCD camera, providing 3mm resolution over a 2m field of view. To account for changes of the system throughput due to exposure to target debris the system was routinely calibrated in situ at 532nm and 355nm using a dedicated pulsed laser source. The diagnostic and calibration methods will be described together with recent results from the NIF early light shots.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
899385
Report Number(s):
UCRL-CONF-221190
TRN: US0701954
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: High Temperature Plasma Diagnostics, Williamsburg, VA, United States, May 07 - May 11, 2006
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CALIBRATION; CONES; FOCUSING; LASERS; LENSES; OPTICS; PLASMA DIAGNOSTICS; PLATES; RESOLUTION; TARGET CHAMBERS; TARGETS; US NATIONAL IGNITION FACILITY

Citation Formats

Mackinnon, A J, Niemann, C, Piston, K, Holtmeier, G, McCarville, T J, Jones, G, Reinbachs, I, Costa, R, Celeste, J, Griffith, R, Kirkwood, R, MacGowan, B, and Glenzer, S. Use of a near back-scattering imaging system on the National Ignition Facility. United States: N. p., 2006. Web.
Mackinnon, A J, Niemann, C, Piston, K, Holtmeier, G, McCarville, T J, Jones, G, Reinbachs, I, Costa, R, Celeste, J, Griffith, R, Kirkwood, R, MacGowan, B, & Glenzer, S. Use of a near back-scattering imaging system on the National Ignition Facility. United States.
Mackinnon, A J, Niemann, C, Piston, K, Holtmeier, G, McCarville, T J, Jones, G, Reinbachs, I, Costa, R, Celeste, J, Griffith, R, Kirkwood, R, MacGowan, B, and Glenzer, S. Mon . "Use of a near back-scattering imaging system on the National Ignition Facility". United States. doi:. https://www.osti.gov/servlets/purl/899385.
@article{osti_899385,
title = {Use of a near back-scattering imaging system on the National Ignition Facility},
author = {Mackinnon, A J and Niemann, C and Piston, K and Holtmeier, G and McCarville, T J and Jones, G and Reinbachs, I and Costa, R and Celeste, J and Griffith, R and Kirkwood, R and MacGowan, B and Glenzer, S},
abstractNote = {A near back-scattering imaging diagnostic system has been implemented, qualified and fielded on the first quad of beams on the National Ignition Facility. This diagnostic images diffusing scatter plates, placed around the final focus lenses on the NIF target chamber, to quantitatively measure the fraction of light back-scattered outside of the incident cone of the focusing optics. The imaging system consists of a wide-angle lens coupled to a gated CCD camera, providing 3mm resolution over a 2m field of view. To account for changes of the system throughput due to exposure to target debris the system was routinely calibrated in situ at 532nm and 355nm using a dedicated pulsed laser source. The diagnostic and calibration methods will be described together with recent results from the NIF early light shots.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2006},
month = {Mon May 01 00:00:00 EDT 2006}
}

Conference:
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