Mitigation of hard x-ray background in backlit pinhole imagers

Fein, J. R.; Keiter, P. A.; Holloway, J. P.; Klein, S. R.; Davis, J. S.; Drake, R. P.

doi:10.1063/1.4962192

Title: Mitigation of hard x-ray background in backlit pinhole imagers

Abstract

Experiments were performed to mitigate the hard x-ray background commonly observed in backlit pinhole imagers. The material of the scaffold holding the primary backlighter foil was varied to reduce the laser-plasma instabilities responsible for hot electrons and resulting hard x-ray background. Radiographic measurements with image plates showed a factor of >25 decrease in x-rays between 30 and 67 keV when going from a plastic to Al or V scaffold. Here, a potential design using V scaffold offers a signal-to-background ratio of 6:1, a factor of 2 greater than using the bare plastic scaffold.

Authors:

Fein, J. R. ^[1]; Keiter, P. A. ^[1]; Holloway, J. P. ^[1]; Klein, S. R. ^[1]; Davis, J. S. ^[1];

^[1]

Univ. of Michigan, Ann Arbor, MI (United States)

Publication Date:: Fri Sep 16 00:00:00 EDT 2016

Research Org.:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)

Contributing Org.:: Laboratory for Laser Energetics, University of Rochester, NY (United States)

OSTI Identifier:: 1339468

Grant/Contract Number:: NA0002956

Resource Type:: Accepted Manuscript

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 87; Journal Issue: 11; Journal ID: ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 07 ISOTOPE AND RADIATION SOURCES; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; X-ray backlighters; laser-plasmas; laser-generated x-rays

Citation Formats


                    Fein, J. R., Keiter, P. A., Holloway, J. P., Klein, S. R., Davis, J. S., and Drake, R. P. Mitigation of hard x-ray background in backlit pinhole imagers.  United States: N. p., 2016. 
Web.  doi:10.1063/1.4962192.

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                    Fein, J. R., Keiter, P. A., Holloway, J. P., Klein, S. R., Davis, J. S., & Drake, R. P. Mitigation of hard x-ray background in backlit pinhole imagers.  United States.  https://doi.org/10.1063/1.4962192

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                    Fein, J. R., Keiter, P. A., Holloway, J. P., Klein, S. R., Davis, J. S., and Drake, R. P. Fri .  
"Mitigation of hard x-ray background in backlit pinhole imagers".  United States.  https://doi.org/10.1063/1.4962192.  https://www.osti.gov/servlets/purl/1339468.

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@article{osti_1339468,

  title        = {Mitigation of hard x-ray background in backlit pinhole imagers},

  author       = {Fein, J. R. and Keiter, P. A. and Holloway, J. P. and Klein, S. R. and Davis, J. S. and Drake, R. P.},

  abstractNote = {Experiments were performed to mitigate the hard x-ray background commonly observed in backlit pinhole imagers. The material of the scaffold holding the primary backlighter foil was varied to reduce the laser-plasma instabilities responsible for hot electrons and resulting hard x-ray background. Radiographic measurements with image plates showed a factor of >25 decrease in x-rays between 30 and 67 keV when going from a plastic to Al or V scaffold. Here, a potential design using V scaffold offers a signal-to-background ratio of 6:1, a factor of 2 greater than using the bare plastic scaffold.},

  doi          = {10.1063/1.4962192},

  journal      = {Review of Scientific Instruments},

  number       = 11,

  volume       = 87,

  place        = {United States},

  year         = {Fri Sep 16 00:00:00 EDT 2016},

  month        = {Fri Sep 16 00:00:00 EDT 2016}

}

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Works referenced in this record:

Uniform large-area x-ray imaging at 9 keV using a backlit pinhole
journal, January 2005

Workman, Jonathan; Fincke, James R.; Kyrala, George A.
Applied Optics, Vol. 44, Issue 6
DOI: 10.1364/AO.44.000859

Laser–plasma interactions in direct-drive ignition plasmas
journal, November 2012

Froula, D. H.; Michel, D. T.; Igumenshchev, I. V.
Plasma Physics and Controlled Fusion, Vol. 54, Issue 12
DOI: 10.1088/0741-3335/54/12/124016

Improved pinhole-apertured point-projection backlighter geometry
journal, October 2004

Blue, B. E.; Hansen, J. F.; Robey, H. F.
Review of Scientific Instruments, Vol. 75, Issue 10
DOI: 10.1063/1.1787936

An evaluation of high energy bremsstrahlung background in point-projection x-ray radiography experiments
journal, October 2012

Krauland, C. M.; Jarrott, L. C.; Drake, R. P.
Review of Scientific Instruments, Vol. 83, Issue 10
DOI: 10.1063/1.4738649

Dual, orthogonal, backlit pinhole radiography in OMEGA experiments
journal, October 2006

Kuranz, C. C.; Blue, B. E.; Drake, R. P.
Review of Scientific Instruments, Vol. 77, Issue 10
DOI: 10.1063/1.2351870

High-energy x-ray backlighter spectrum measurements using calibrated image plates
journal, February 2011

Maddox, B. R.; Park, H. S.; Remington, B. A.
Review of Scientific Instruments, Vol. 82, Issue 2
DOI: 10.1063/1.3531979

Hydrodynamic simulations of long-scale-length two-plasmon–decay experiments at the Omega Laser Facility
journal, March 2013

Michel, D. T.; Edgell, D. H.; Froula, D. H.
Physics of Plasmas, Vol. 20, Issue 3
DOI: 10.1063/1.4794285

X-ray backlighting for the National Ignition Facility (invited)
journal, January 2001

Landen, O. L.; Farley, D. R.; Glendinning, S. G.
Review of Scientific Instruments, Vol. 72, Issue 1
DOI: 10.1063/1.1315641

Mitigation of two-plasmon decay in direct-drive inertial confinement fusion through the manipulation of ion-acoustic and Langmuir wave damping
journal, May 2013

Myatt, J. F.; Vu, H. X.; DuBois, D. F.
Physics of Plasmas, Vol. 20, Issue 5
DOI: 10.1063/1.4807036

Investigation of the hard x-ray background in backlit pinhole imagers
journal, November 2014

Fein, J. R.; Peebles, J. L.; Keiter, P. A.
Review of Scientific Instruments, Vol. 85, Issue 11
DOI: 10.1063/1.4891051

Cross calibration of AGFA-D7 x-ray film against direct exposure film from 2to8.5keV using laser generated x-rays
journal, May 2006

Kyrala, George A.
Review of Scientific Instruments, Vol. 77, Issue 5
DOI: 10.1063/1.2194787

Works referencing / citing this record:

Mitigation of hot electrons from laser-plasma instabilities in high-Z, highly ionized plasmas
journal, March 2017

Fein, J. R.; Holloway, J. P.; Trantham, M. R.
Physics of Plasmas, Vol. 24, Issue 3
DOI: 10.1063/1.4978625

Bremsstrahlung x-ray generation for high optical depth radiography applications on the National Ignition Facility
journal, October 2018

Huntington, C. M.; McNaney, J. M.; Gumbrell, E.
Review of Scientific Instruments, Vol. 89, Issue 10
DOI: 10.1063/1.5039379

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Similar Records

Title: Mitigation of hard x-ray background in backlit pinhole imagers

Abstract

Citation Formats

Uniform large-area x-ray imaging at 9 keV using a backlit pinhole journal, January 2005

Laser–plasma interactions in direct-drive ignition plasmas journal, November 2012

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Hydrodynamic simulations of long-scale-length two-plasmon–decay experiments at the Omega Laser Facility journal, March 2013

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Uniform large-area x-ray imaging at 9 keV using a backlit pinhole
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Dual, orthogonal, backlit pinhole radiography in OMEGA experiments
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High-energy x-ray backlighter spectrum measurements using calibrated image plates
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Hydrodynamic simulations of long-scale-length two-plasmon–decay experiments at the Omega Laser Facility
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Mitigation of hot electrons from laser-plasma instabilities in high-Z, highly ionized plasmas
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Bremsstrahlung x-ray generation for high optical depth radiography applications on the National Ignition Facility
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