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Title: A framed, 16-image Kirkpatrick–Baez x-ray microscope

Abstract

A 16-image Kirkpatrick–Baez (KB)–type x-ray microscope consisting of compact KB mirrors has been assembled for the first time with mirrors aligned to allow it to be coupled to a high-speed framing camera. The high-speed framing camera has four independently gated strips whose emission sampling interval is ~30 ps. Images are arranged four to a strip with ~60-ps temporal spacing between frames on a strip. By spacing the timing of the strips, a frame spacing of ~15 ps is achieved. A framed resolution of ~6-um is achieved with this combination in a 400-um region of laser–plasma x-ray emission in the 2- to 8-keV energy range. A principal use of the microscope is to measure the evolution of the implosion stagnation region of cryogenic DT target implosions on the University of Rochester’s OMEGA Laser System. The unprecedented time and spatial resolution achieved with this framed, multi-image KB microscope have made it possible to accurately determine the cryogenic implosion core emission size and shape at the peak of stagnation. In conclusion, these core size measurements, taken in combination with those of ion temperature, neutron-production temporal width, and neutron yield allow for inference of core pressures, currently exceeding 50 GBar in OMEGA cryogenic targetmore » implosions.« less

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1]
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  1. Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
Laboratory for Laser Energetics, University of Rochester
OSTI Identifier:
1394625
Alternate Identifier(s):
OSTI ID: 1380056
Report Number(s):
2016-243, 1351
Journal ID: ISSN 0034-6748; 2016-243, 1351
Grant/Contract Number:  
NA0001944
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 88; Journal Issue: 9; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Marshall, F. J., Bahr, R. E., Goncharov, V. N., Glebov, V. Yu., Peng, B., Regan, S. P., Sangster, T. C., and Stoeckl, C. A framed, 16-image Kirkpatrick–Baez x-ray microscope. United States: N. p., 2017. Web. doi:10.1063/1.5000737.
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Marshall, F. J., Bahr, R. E., Goncharov, V. N., Glebov, V. Yu., Peng, B., Regan, S. P., Sangster, T. C., & Stoeckl, C. A framed, 16-image Kirkpatrick–Baez x-ray microscope. United States. https://doi.org/10.1063/1.5000737
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Marshall, F. J., Bahr, R. E., Goncharov, V. N., Glebov, V. Yu., Peng, B., Regan, S. P., Sangster, T. C., and Stoeckl, C. Fri . "A framed, 16-image Kirkpatrick–Baez x-ray microscope". United States. https://doi.org/10.1063/1.5000737. https://www.osti.gov/servlets/purl/1394625.
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@article{osti_1394625,
title = {A framed, 16-image Kirkpatrick–Baez x-ray microscope},
author = {Marshall, F. J. and Bahr, R. E. and Goncharov, V. N. and Glebov, V. Yu. and Peng, B. and Regan, S. P. and Sangster, T. C. and Stoeckl, C.},
abstractNote = {A 16-image Kirkpatrick–Baez (KB)–type x-ray microscope consisting of compact KB mirrors has been assembled for the first time with mirrors aligned to allow it to be coupled to a high-speed framing camera. The high-speed framing camera has four independently gated strips whose emission sampling interval is ~30 ps. Images are arranged four to a strip with ~60-ps temporal spacing between frames on a strip. By spacing the timing of the strips, a frame spacing of ~15 ps is achieved. A framed resolution of ~6-um is achieved with this combination in a 400-um region of laser–plasma x-ray emission in the 2- to 8-keV energy range. A principal use of the microscope is to measure the evolution of the implosion stagnation region of cryogenic DT target implosions on the University of Rochester’s OMEGA Laser System. The unprecedented time and spatial resolution achieved with this framed, multi-image KB microscope have made it possible to accurately determine the cryogenic implosion core emission size and shape at the peak of stagnation. In conclusion, these core size measurements, taken in combination with those of ion temperature, neutron-production temporal width, and neutron yield allow for inference of core pressures, currently exceeding 50 GBar in OMEGA cryogenic target implosions.},
doi = {10.1063/1.5000737},
journal = {Review of Scientific Instruments},
number = 9,
volume = 88,
place = {United States},
year = {Fri Sep 08 00:00:00 EDT 2017},
month = {Fri Sep 08 00:00:00 EDT 2017}
}
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https://doi.org/10.1063/1.5000737
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Works referenced in this record:

A framed monochromatic x-ray microscope for ICF (invited)
journal, January 1997

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Masked-backlighter technique used to simultaneously image x-ray absorption and x-ray emission from an inertial confinement fusion plasma
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Compact Kirkpatrick–Baez microscope mirrors for imaging laser-plasma x-ray emission
journal, October 2012

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Direct-drive-implosion experiments with enhanced fluence balance on OMEGA
journal, January 2004

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Neutron temporal diagnostic for high-yield deuterium–tritium cryogenic implosions on OMEGA
journal, May 2016

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Eight-channel Kirkpatrick–Baez microscope for multiframe x-ray imaging diagnostics in laser plasma experiments
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The effects of target mounts in direct-drive implosions on OMEGA
journal, August 2009

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OMEGA polar-drive target designs
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    Works referencing / citing this record:

    Three-dimensional modeling of the neutron spectrum to infer plasma conditions in cryogenic inertial confinement fusion implosions
    journal, April 2018

    • Weilacher, F.; Radha, P. B.; Forrest, C.
    • Physics of Plasmas, Vol. 25, Issue 4
    • DOI: 10.1063/1.5016856

    Note: Tandem Kirkpatrick–Baez microscope with sixteen channels for high-resolution laser-plasma diagnostics
    journal, March 2018

    • Yi, Shengzhen; Zhang, Zhe; Huang, Qiushi
    • Review of Scientific Instruments, Vol. 89, Issue 3
    • DOI: 10.1063/1.5019206

    The single-line-of-sight, time-resolved x-ray imager diagnostic on OMEGA
    journal, October 2018

    • Theobald, W.; Sorce, C.; Bedzyk, M.
    • Review of Scientific Instruments, Vol. 89, Issue 10
    • DOI: 10.1063/1.5036767

    Development of an adjustable Kirkpatrick-Baez microscope for laser driven x-ray sources
    journal, June 2019

    • Zeraouli, G.; Gatti, G.; Longman, A.
    • Review of Scientific Instruments, Vol. 90, Issue 6
    • DOI: 10.1063/1.5091103

    Inferred UV fluence focal-spot profiles from soft x-ray pinhole-camera measurements on OMEGA
    journal, February 2020

    • Theobald, W.; Sorce, C.; Donaldson, W. R.
    • Review of Scientific Instruments, Vol. 91, Issue 2
    • DOI: 10.1063/1.5120708
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