Prevention of Residual Gas Condensation on the Laser Entry Hole Windows on Cryogenic NIF Targets Using a Protective Warm Film

Bhandarkar, Suhas; Fair, Jim; Haid, Ben; Mapoles, Evan; Atherton, Jeff; Thomas, Cliff; Moody, John; Kroll, Jeremy; Nikroo, Abbas

doi:10.1080/15361055.2017.1406249

Title: Prevention of Residual Gas Condensation on the Laser Entry Hole Windows on Cryogenic NIF Targets Using a Protective Warm Film

Abstract

Many of the early cryogenic shots on NIF were plagued by buildup of considerable mass of extraneous ice on the LEH windows, a consequence of condensation of the residual air in the surrounding chamber. Thickness of this ice depended on the exact chamber pressure and the target fielding time duration, both extremely difficult to keep constant given the broad range of target types being shot. In this paper, we describe our work in designing a robust solution in the form of a second thin film that shielded the LEH window from the contaminating ice. Several detailed cryogenic considerations were required to ensure the proper functioning of this new window, which were simulated and verified experimentally. Data from numerous subsequent shots showed marked improvement in performance, which made this new feature an essential component for all cryogenic NIF targets.

Authors:

Bhandarkar, Suhas ^[1]; Fair, Jim ^[1]; Haid, Ben ^[1]; Mapoles, Evan ^[1]; Atherton, Jeff ^[1]; Thomas, Cliff ^[1]; Moody, John ^[1]; Kroll, Jeremy ^[1]; Nikroo, Abbas ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Fri Jan 19 00:00:00 EST 2018

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1430923

Report Number(s):: LLNL-JRNL-737820
Journal ID: ISSN 1536-1055; TRN: US1802638

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: Fusion Science and Technology

Additional Journal Information:: Journal Volume: 73; Journal Issue: 3; Journal ID: ISSN 1536-1055

Publisher:: American Nuclear Society

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION

Citation Formats


                    Bhandarkar, Suhas, Fair, Jim, Haid, Ben, Mapoles, Evan, Atherton, Jeff, Thomas, Cliff, Moody, John, Kroll, Jeremy, and Nikroo, Abbas. Prevention of Residual Gas Condensation on the Laser Entry Hole Windows on Cryogenic NIF Targets Using a Protective Warm Film.  United States: N. p., 2018. 
Web.  doi:10.1080/15361055.2017.1406249.

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                    Bhandarkar, Suhas, Fair, Jim, Haid, Ben, Mapoles, Evan, Atherton, Jeff, Thomas, Cliff, Moody, John, Kroll, Jeremy, & Nikroo, Abbas. Prevention of Residual Gas Condensation on the Laser Entry Hole Windows on Cryogenic NIF Targets Using a Protective Warm Film.  United States.  https://doi.org/10.1080/15361055.2017.1406249

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                    Bhandarkar, Suhas, Fair, Jim, Haid, Ben, Mapoles, Evan, Atherton, Jeff, Thomas, Cliff, Moody, John, Kroll, Jeremy, and Nikroo, Abbas. Fri .  
"Prevention of Residual Gas Condensation on the Laser Entry Hole Windows on Cryogenic NIF Targets Using a Protective Warm Film".  United States.  https://doi.org/10.1080/15361055.2017.1406249.  https://www.osti.gov/servlets/purl/1430923.

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@article{osti_1430923,

  title        = {Prevention of Residual Gas Condensation on the Laser Entry Hole Windows on Cryogenic NIF Targets Using a Protective Warm Film},

  author       = {Bhandarkar, Suhas and Fair, Jim and Haid, Ben and Mapoles, Evan and Atherton, Jeff and Thomas, Cliff and Moody, John and Kroll, Jeremy and Nikroo, Abbas},

  abstractNote = {Many of the early cryogenic shots on NIF were plagued by buildup of considerable mass of extraneous ice on the LEH windows, a consequence of condensation of the residual air in the surrounding chamber. Thickness of this ice depended on the exact chamber pressure and the target fielding time duration, both extremely difficult to keep constant given the broad range of target types being shot. In this paper, we describe our work in designing a robust solution in the form of a second thin film that shielded the LEH window from the contaminating ice. Several detailed cryogenic considerations were required to ensure the proper functioning of this new window, which were simulated and verified experimentally. Data from numerous subsequent shots showed marked improvement in performance, which made this new feature an essential component for all cryogenic NIF targets.},

  doi          = {10.1080/15361055.2017.1406249},

  journal      = {Fusion Science and Technology},

  number       = 3,

  volume       = 73,

  place        = {United States},

  year         = {Fri Jan 19 00:00:00 EST 2018},

  month        = {Fri Jan 19 00:00:00 EST 2018}

}

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Journal Article:

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https://doi.org/10.1080/15361055.2017.1406249

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Cited by: 1 work

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Figures / Tables:

Figure 1: Cross-section cut-out view of the target inside the NIF shroud.

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Works referenced in this record:

Status of cryogenic layering for NIF ignition targets
journal, May 2008

Moody, J. D.; Kozioziemski, B. J.; Mapoles, E. R.
Journal of Physics: Conference Series, Vol. 112, Issue 3
DOI: 10.1088/1742-6596/112/3/032064

Modeling and Experiments of Compressible Gas Flow Through Microcapillary Fill Tubes on NIF Targets
journal, January 2011

Bhandarkar, S.; Parham, T.; Fair, J.
Fusion Science and Technology, Vol. 59, Issue 1
DOI: 10.13182/FST10-3718

Constitutive Models for the Viscoelastic Behavior of Polyimide Membranes at Room and Deep Cryogenic Temperatures
journal, September 2016

Bhandarkar, Suhas; Betcher, Jacob; Smith, Ryan
Fusion Science and Technology, Vol. 70, Issue 2
DOI: 10.13182/FST15-218

Ignition on the National Ignition Facility: a path towards inertial fusion energy
journal, September 2009

Moses, Edward I.
Nuclear Fusion, Vol. 49, Issue 10
DOI: 10.1088/0029-5515/49/10/104022

The physics basis for ignition using indirect-drive targets on the National Ignition Facility
journal, February 2004

Lindl, John D.; Amendt, Peter; Berger, Richard L.
Physics of Plasmas, Vol. 11, Issue 2
DOI: 10.1063/1.1578638

Laser Entrance Hole Window Burst and Pressure Deflections at Cryogenic Temperature
journal, January 2011

Lairson, Bruce; Smith, Ryan; Guckian, Jeff
Fusion Science and Technology, Vol. 59, Issue 1
DOI: 10.13182/FST10-3686

Solid deuterium–tritium surface roughness in a beryllium inertial confinement fusion shell
journal, December 2006

Kozioziemski, B. J.; Montgomery, D. S.; Sater, J. D.
Nuclear Fusion, Vol. 47, Issue 1
DOI: 10.1088/0029-5515/47/1/001

Experimental D-T Ice-Layering Target Assembly
journal, April 2009

Alger, E. T.; Dzenitis, E. G.; Mapoles, E. R.
Fusion Science and Technology, Vol. 55, Issue 3
DOI: 10.13182/FST08-3506

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

Dewald, E. L.; Hartemann, F.; Michel, P.
Physical Review Letters, Vol. 116, Issue 7
DOI: 10.1103/PhysRevLett.116.075003

Target Development for the National Ignition Campaign
journal, February 2016

Hamza, A. V.; Nikroo, A.; Alger, E.
Fusion Science and Technology, Vol. 69, Issue 1
DOI: 10.13182/FST15-163

Cryogenic Target System for Hydrogen Layering
journal, February 2016

Parham, T.; Kozioziemski, B.; Atkinson, D.
Fusion Science and Technology, Vol. 69, Issue 1
DOI: 10.13182/FST15-162

Cryogenic DT and D2 targets for inertial confinement fusion
journal, May 2007

Sangster, T. C.; Betti, R.; Craxton, R. S.
Physics of Plasmas, Vol. 14, Issue 5
DOI: 10.1063/1.2671844

Design of the NIF Cryogenic Target System
journal, April 2009

Gibson, C. R.; Atkinson, D. P.; Baltz, J. A.
Fusion Science and Technology, Vol. 55, Issue 3
DOI: 10.13182/FST08-3453

Measurement of Total Condensation on a Shrouded Cryogenic Surface Using a Single Quartz Crystal Microbalance
journal, April 2009

Haid, B. J.; Malsbury, T. N.; Gibson, C. R.
Fusion Science and Technology, Vol. 55, Issue 3
DOI: 10.13182/FST08-3451

Figures / Tables found in this record:

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

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Similar Records

Title: Prevention of Residual Gas Condensation on the Laser Entry Hole Windows on Cryogenic NIF Targets Using a Protective Warm Film

Abstract

Citation Formats

Figures / Tables:

Status of cryogenic layering for NIF ignition targets journal, May 2008

Modeling and Experiments of Compressible Gas Flow Through Microcapillary Fill Tubes on NIF Targets journal, January 2011

Constitutive Models for the Viscoelastic Behavior of Polyimide Membranes at Room and Deep Cryogenic Temperatures journal, September 2016

Ignition on the National Ignition Facility: a path towards inertial fusion energy journal, September 2009

The physics basis for ignition using indirect-drive targets on the National Ignition Facility journal, February 2004

Laser Entrance Hole Window Burst and Pressure Deflections at Cryogenic Temperature journal, January 2011

Solid deuterium–tritium surface roughness in a beryllium inertial confinement fusion shell journal, December 2006

Experimental D-T Ice-Layering Target Assembly journal, April 2009

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

Target Development for the National Ignition Campaign journal, February 2016

Cryogenic Target System for Hydrogen Layering journal, February 2016

Cryogenic DT and D2 targets for inertial confinement fusion journal, May 2007

Design of the NIF Cryogenic Target System journal, April 2009

Measurement of Total Condensation on a Shrouded Cryogenic Surface Using a Single Quartz Crystal Microbalance journal, April 2009

Status of cryogenic layering for NIF ignition targets
journal, May 2008

Modeling and Experiments of Compressible Gas Flow Through Microcapillary Fill Tubes on NIF Targets
journal, January 2011

Constitutive Models for the Viscoelastic Behavior of Polyimide Membranes at Room and Deep Cryogenic Temperatures
journal, September 2016

Ignition on the National Ignition Facility: a path towards inertial fusion energy
journal, September 2009

The physics basis for ignition using indirect-drive targets on the National Ignition Facility
journal, February 2004

Laser Entrance Hole Window Burst and Pressure Deflections at Cryogenic Temperature
journal, January 2011

Solid deuterium–tritium surface roughness in a beryllium inertial confinement fusion shell
journal, December 2006

Experimental D-T Ice-Layering Target Assembly
journal, April 2009

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

Target Development for the National Ignition Campaign
journal, February 2016

Cryogenic Target System for Hydrogen Layering
journal, February 2016

Cryogenic DT and D2 targets for inertial confinement fusion
journal, May 2007

Design of the NIF Cryogenic Target System
journal, April 2009

Measurement of Total Condensation on a Shrouded Cryogenic Surface Using a Single Quartz Crystal Microbalance
journal, April 2009