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Title: eHXI: A permanently installed, hard x-ray imager for the National Ignition Facility

Abstract

We have designed and built a multi-pinhole imaging system for high energy x-rays (≥ 50 keV) that is permanently installed in the equatorial plane outside of the target chamber at the National Ignition Facility (NIF). It records absolutely-calibrated, time-integrated x-ray images with the same line-of-sight as the multi-channel, spatially integrating hard x-ray detector FFLEX [McDonald et al., Rev. Sci. Instrum. 75 (2004) 3753], having a side view of indirect-drive inertial confinement fusion (ICF) implosion targets. The equatorial hard x-ray imager (eHXI) has recorded images on the majority of ICF implosion experiments since May 2011. Lastly, eHXI provides valuable information on hot electron distribution in hohlraum experiments, target alignment, potential hohlraum drive asymmetries and serves as a long term reference for the FFLEX diagnostics.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [3];  [1];  [1];  [1];  [1];  [1]
+ Show Author Affiliations
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, Rochester, NY (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1260501
Report Number(s):
LLNL-JRNL-685858
Journal ID: ISSN 1748-0221
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Instrumentation
Additional Journal Information:
Journal Volume: 11; Journal Issue: 06; Journal ID: ISSN 1748-0221
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ICF; imaging; hard x-rays

Citation Formats

Doppner, T., Bachmann, B., Albert, F., Bell, P., Burns, S., Celeste, J., Chow, R., Divol, L., Dewald, E. L., Hohenberger, M., Izumi, N., LaCaille, G., Landen, O. L., Palmer, N., Park, H. -S., Thomas, C. A., and Huntington, C. eHXI: A permanently installed, hard x-ray imager for the National Ignition Facility. United States: N. p., 2016. Web. doi:10.1088/1748-0221/11/06/P06010.
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Doppner, T., Bachmann, B., Albert, F., Bell, P., Burns, S., Celeste, J., Chow, R., Divol, L., Dewald, E. L., Hohenberger, M., Izumi, N., LaCaille, G., Landen, O. L., Palmer, N., Park, H. -S., Thomas, C. A., & Huntington, C. eHXI: A permanently installed, hard x-ray imager for the National Ignition Facility. United States. https://doi.org/10.1088/1748-0221/11/06/P06010
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Doppner, T., Bachmann, B., Albert, F., Bell, P., Burns, S., Celeste, J., Chow, R., Divol, L., Dewald, E. L., Hohenberger, M., Izumi, N., LaCaille, G., Landen, O. L., Palmer, N., Park, H. -S., Thomas, C. A., and Huntington, C. Tue . "eHXI: A permanently installed, hard x-ray imager for the National Ignition Facility". United States. https://doi.org/10.1088/1748-0221/11/06/P06010. https://www.osti.gov/servlets/purl/1260501.
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@article{osti_1260501,
title = {eHXI: A permanently installed, hard x-ray imager for the National Ignition Facility},
author = {Doppner, T. and Bachmann, B. and Albert, F. and Bell, P. and Burns, S. and Celeste, J. and Chow, R. and Divol, L. and Dewald, E. L. and Hohenberger, M. and Izumi, N. and LaCaille, G. and Landen, O. L. and Palmer, N. and Park, H. -S. and Thomas, C. A. and Huntington, C.},
abstractNote = {We have designed and built a multi-pinhole imaging system for high energy x-rays (≥ 50 keV) that is permanently installed in the equatorial plane outside of the target chamber at the National Ignition Facility (NIF). It records absolutely-calibrated, time-integrated x-ray images with the same line-of-sight as the multi-channel, spatially integrating hard x-ray detector FFLEX [McDonald et al., Rev. Sci. Instrum. 75 (2004) 3753], having a side view of indirect-drive inertial confinement fusion (ICF) implosion targets. The equatorial hard x-ray imager (eHXI) has recorded images on the majority of ICF implosion experiments since May 2011. Lastly, eHXI provides valuable information on hot electron distribution in hohlraum experiments, target alignment, potential hohlraum drive asymmetries and serves as a long term reference for the FFLEX diagnostics.},
doi = {10.1088/1748-0221/11/06/P06010},
journal = {Journal of Instrumentation},
number = 06,
volume = 11,
place = {United States},
year = {Tue Jun 14 00:00:00 EDT 2016},
month = {Tue Jun 14 00:00:00 EDT 2016}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1088/1748-0221/11/06/P06010
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Works referenced in this record:

Hard x-ray (>100 keV) imager to measure hot electron preheat for indirectly driven capsule implosions on the NIF
journal, October 2012

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journal, May 2014

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X-ray and neutron sensitivity of imaging plates
conference, September 2013

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Bright x-ray stainless steel K-shell source development at the National Ignition Facility
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Point design targets, specifications, and requirements for the 2010 ignition campaign on the National Ignition Facility
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  • Physics of Plasmas, Vol. 18, Issue 5
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Filter-fluorescer diagnostic system for the National Ignition Facility
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First hot electron measurements in near-ignition scale hohlraums on the National Ignition Facility
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Measuring the hot-electron population using time-resolved hard x-ray detectors on the NIF
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Characterizing high energy spectra of NIF ignition Hohlraums using a differentially filtered high energy multipinhole x-ray imager
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Demonstration of High Performance in Layered Deuterium-Tritium Capsule Implosions in Uranium Hohlraums at the National Ignition Facility
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Direct Measurement of Energetic Electrons Coupling to an Imploding Low-Adiabat Inertial Confinement Fusion Capsule
journal, March 2012

Generation and Beaming of Early Hot Electrons onto the Capsule in Laser-Driven Ignition Hohlraums
journal, February 2016

Stimulated Raman Backscatter from a Magnetically Confined Plasma Column
journal, August 1982

2D X-Ray Radiography of Imploding Capsules at the National Ignition Facility
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    Works referencing / citing this record:

    Maintaining low-mode symmetry control with extended pulse shapes for lower-adiabat Bigfoot implosions on the National Ignition Facility
    journal, November 2019

    • Hohenberger, M.; Casey, D. T.; Thomas, C. A.
    • Physics of Plasmas, Vol. 26, Issue 11
    • DOI: 10.1063/1.5121435

    High-energy (>70 keV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility
    journal, March 2017

    • Chen, Hui; Hermann, M. R.; Kalantar, D. H.
    • Physics of Plasmas, Vol. 24, Issue 3
    • DOI: 10.1063/1.4978493

    Examining the radiation drive asymmetries present in the high foot series of implosion experiments at the National Ignition Facility
    journal, May 2017

    • Pak, A.; Divol, L.; Kritcher, A. L.
    • Physics of Plasmas, Vol. 24, Issue 5
    • DOI: 10.1063/1.4979192

    X-ray penumbral imaging diagnostic developments at the National Ignition Facility
    conference, September 2017

    • Felker, Sean J.; Bachmann, Benjamin; Abu Shawareb, Hatim
    • Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI
    • DOI: 10.1117/12.2274611

    Resolving hot spot microstructure using x-ray penumbral imaging (invited)
    journal, August 2016

    • Bachmann, B.; Hilsabeck, T.; Field, J.
    • Review of Scientific Instruments, Vol. 87, Issue 11
    • DOI: 10.1063/1.4959161

    Experimental results of radiation-driven, layered deuterium-tritium implosions with adiabat-shaped drives at the National Ignition Facility
    journal, October 2016

    • Smalyuk, V. A.; Robey, H. F.; Döppner, T.
    • Physics of Plasmas, Vol. 23, Issue 10
    • DOI: 10.1063/1.4964919
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