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Title: Time-resolved Soft X-Ray Imaging (SXRI) diagnostic for use at the NIF and OMEGA lasers

Abstract

The soft x-ray imager (SXRI) built for the first experiments at the National Ignition Facility (NIF) has four soft x-ray channels and one hard x-ray channel. The SXRI is a snout that mounts to a four strip gated imager. This produces four soft x-ray images per strip, which can be separated in time by {approx}60psec. Each soft x-ray channel consists of a mirror plus a filter. The diagnostic was used to study x-ray burnthrough of hot hohlraum targets at the NIF and OMEGA lasers. The SXRI snout design and issues involved in selecting the desired soft x-ray channels are discussed.

Authors:
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Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
889445
Report Number(s):
UCRL-CONF-221117
TRN: US0604427
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: 16th Topical Conf. on 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; DESIGN; LASERS; MIRRORS; PLASMA DIAGNOSTICS; TARGETS; US NATIONAL IGNITION FACILITY

Citation Formats

Schneider, M, Holder, J, James, D, Bruns, H, Celeste, J, Compton, S, Costa, R, Ellis, A, Emig, J, Hargrove, D, Kalantar, D, MacGowan, B, Power, G, Sorce, C, Rekow, V, Widmann, K, Young, B, Young, P, Garcia, O, McKenney, J, Haugh, M, Goldin, F, MacNeil, L, and Cone, K. Time-resolved Soft X-Ray Imaging (SXRI) diagnostic for use at the NIF and OMEGA lasers. United States: N. p., 2006. Web.
Schneider, M, Holder, J, James, D, Bruns, H, Celeste, J, Compton, S, Costa, R, Ellis, A, Emig, J, Hargrove, D, Kalantar, D, MacGowan, B, Power, G, Sorce, C, Rekow, V, Widmann, K, Young, B, Young, P, Garcia, O, McKenney, J, Haugh, M, Goldin, F, MacNeil, L, & Cone, K. Time-resolved Soft X-Ray Imaging (SXRI) diagnostic for use at the NIF and OMEGA lasers. United States.
Schneider, M, Holder, J, James, D, Bruns, H, Celeste, J, Compton, S, Costa, R, Ellis, A, Emig, J, Hargrove, D, Kalantar, D, MacGowan, B, Power, G, Sorce, C, Rekow, V, Widmann, K, Young, B, Young, P, Garcia, O, McKenney, J, Haugh, M, Goldin, F, MacNeil, L, and Cone, K. Thu . "Time-resolved Soft X-Ray Imaging (SXRI) diagnostic for use at the NIF and OMEGA lasers". United States. doi:. https://www.osti.gov/servlets/purl/889445.
@article{osti_889445,
title = {Time-resolved Soft X-Ray Imaging (SXRI) diagnostic for use at the NIF and OMEGA lasers},
author = {Schneider, M and Holder, J and James, D and Bruns, H and Celeste, J and Compton, S and Costa, R and Ellis, A and Emig, J and Hargrove, D and Kalantar, D and MacGowan, B and Power, G and Sorce, C and Rekow, V and Widmann, K and Young, B and Young, P and Garcia, O and McKenney, J and Haugh, M and Goldin, F and MacNeil, L and Cone, K},
abstractNote = {The soft x-ray imager (SXRI) built for the first experiments at the National Ignition Facility (NIF) has four soft x-ray channels and one hard x-ray channel. The SXRI is a snout that mounts to a four strip gated imager. This produces four soft x-ray images per strip, which can be separated in time by {approx}60psec. Each soft x-ray channel consists of a mirror plus a filter. The diagnostic was used to study x-ray burnthrough of hot hohlraum targets at the NIF and OMEGA lasers. The SXRI snout design and issues involved in selecting the desired soft x-ray channels are discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu May 04 00:00:00 EDT 2006},
month = {Thu May 04 00:00:00 EDT 2006}
}

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  • The soft x-ray imager (SXRI) built for the first experiments at the National Ignition Facility (NIF) has four soft x-ray channels and one hard x-ray channel. The SXRI is a snout that mounts to a four strip gated imager. This produces four soft x-ray images per strip, which can be separated in time by {approx}60psec. Each soft x-ray channel consists of a mirror plus a filter. The diagnostic was used to study x-ray burnthrough of hot hohlraum targets at the NIF and OMEGA lasers. The SXRI snout design and issues involved in selecting the desired soft x-ray channels are discussed.
  • The soft x-ray imager (SXRI) built for the first experiments at the National Ignition Facility (NIF) has four soft x-ray channels and one hard x-ray channel. The SXRI is a snout that mounts to a four strip gated imager. This produces four soft x-ray images per strip, which can be separated in time by {approx}60 ps. Each soft x-ray channel consists of a mirror plus a filter. The diagnostic was used to study x-ray burnthrough of hot Hohlraum targets at the NIF and OMEGA lasers. The SXRI snout design and issues involved in selecting the desired soft x-ray channels aremore » discussed.« less
  • High energy (> 10 keV) x-ray self-emission imaging and radiography will be essential components of many NIF High Energy Density Physics experiments. In preparation for such experiments, we have evaluated the pros and cons of various static (x-ray film, bare CCD, and scintillator + CCD) and time-resolved (streaked and gated) 10-1000 keV detectors.
  • An experimental campaign to maximize radiation drive in small-scale hohlraums has been carried out at the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory (Livermore, CA USA) and at the OMEGA laser at the Laboratory for Laser Energetics (Rochester, NY USA). The small-scale hohlraums, laser energy, laser pulse, and diagnostics were similar at both facilities but the geometries were very different. The NIF experiments used on-axis laser beams whereas the OMEGA experiments used 19 beams in three beam cones. In the cases when the lasers coupled well and produced similar radiation drive, images of x-ray burnthrough and lasermore » deposition indicate the pattern of plasma filling is very different.« less
  • Soft x-ray power diagnostics are essential for measuring spectrally resolved the total x-ray flux, radiation temperature, conversion efficiency and albedo that are important quantities for the energetics of indirect drive hohlraums. At the Nova or Omega Laser Facilities, these measurements are performed mainly with Dante, but also with DMX and photo-conductive detectors (PCD's). The Dante broadband spectrometer is a collection of absolute calibrated vacuum x-ray diodes, thin filters and x-ray mirrors used to measure the soft x-ray emission for photon energies above 50 eV.