Calibration of proton dispersion for the NIF electron positron proton spectrometer (NEPPS) for short-pulse laser experiments on the NIF ARC

Mariscal, D.; Williams, G. J.; Chen, H.; Ayers, S.; Lemos, N.; Kerr, S.; Ma, T.

doi:10.1063/1.5039388

Title: Calibration of proton dispersion for the NIF electron positron proton spectrometer (NEPPS) for short-pulse laser experiments on the NIF ARC

Abstract

Experiments using the Advanced Radiographic Capability (ARC) laser at the National Ignition Facility (NIF) aim to characterize short-pulse-driven proton beams for use as both probes and drivers for high-energy-density physics experiments. Measurements of ARC-driven proton beam characteristics, such as energy spectrum and conversion efficiency, rely on the NIF Electron Positron Proton Spectrometer (NEPPS). The NEPPS diagnostic is a version of an existing particle spectrometer which is used for detecting MeV electron and positron spectra via permanent magnetic field dispersion. These spectrometers have not yet been calibrated for protons and instead use an analytical calculation to estimate the dispersion. Small variations in the field uniformity can affect the proton dispersion due to the relatively small resolving power (E/dE) for this diagnostic. A broadband energy, laser-accelerated proton source was produced at the Titan laser to experimentally calibrate the proton dispersion. These experimental data were used to test the theoretical dispersion. Numerical simulations using measurements of the magnetic field variation within the diagnostic were used to obtain a realistic proton dispersion curve for the new NEPPS units. In conclusion, this procedure for obtaining each independent dispersion is applicable to all EPPS and NEPPS diagnostics, given the axial magnetic field profile.

Authors:

Mariscal, D. ^[1];

^[1]; Chen, H. ^[1];

^[1]; Lemos, N. ^[1]; Kerr, S. ^[2]; Ma, T. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of Alberta, Edmonton, AB (Canada). Dept. of Electrical and Computer Engineering

Publication Date:: Mon Oct 01 00:00:00 EDT 2018

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

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1479064

Alternate Identifier(s):: OSTI ID: 1478441

Report Number(s):: LLNL-JRNL-751040
Journal ID: ISSN 0034-6748; 936479

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Lasers

Citation Formats


                    Mariscal, D., Williams, G. J., Chen, H., Ayers, S., Lemos, N., Kerr, S., and Ma, T. Calibration of proton dispersion for the NIF electron positron proton spectrometer (NEPPS) for short-pulse laser experiments on the NIF ARC.  United States: N. p., 2018. 
Web.  doi:10.1063/1.5039388.

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                    Mariscal, D., Williams, G. J., Chen, H., Ayers, S., Lemos, N., Kerr, S., & Ma, T. Calibration of proton dispersion for the NIF electron positron proton spectrometer (NEPPS) for short-pulse laser experiments on the NIF ARC.  United States.  https://doi.org/10.1063/1.5039388

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                    Mariscal, D., Williams, G. J., Chen, H., Ayers, S., Lemos, N., Kerr, S., and Ma, T. Mon .  
"Calibration of proton dispersion for the NIF electron positron proton spectrometer (NEPPS) for short-pulse laser experiments on the NIF ARC".  United States.  https://doi.org/10.1063/1.5039388.  https://www.osti.gov/servlets/purl/1479064.

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@article{osti_1479064,

  title        = {Calibration of proton dispersion for the NIF electron positron proton spectrometer (NEPPS) for short-pulse laser experiments on the NIF ARC},

  author       = {Mariscal, D. and Williams, G. J. and Chen, H. and Ayers, S. and Lemos, N. and Kerr, S. and Ma, T.},

  abstractNote = {Experiments using the Advanced Radiographic Capability (ARC) laser at the National Ignition Facility (NIF) aim to characterize short-pulse-driven proton beams for use as both probes and drivers for high-energy-density physics experiments. Measurements of ARC-driven proton beam characteristics, such as energy spectrum and conversion efficiency, rely on the NIF Electron Positron Proton Spectrometer (NEPPS). The NEPPS diagnostic is a version of an existing particle spectrometer which is used for detecting MeV electron and positron spectra via permanent magnetic field dispersion. These spectrometers have not yet been calibrated for protons and instead use an analytical calculation to estimate the dispersion. Small variations in the field uniformity can affect the proton dispersion due to the relatively small resolving power (E/dE) for this diagnostic. A broadband energy, laser-accelerated proton source was produced at the Titan laser to experimentally calibrate the proton dispersion. These experimental data were used to test the theoretical dispersion. Numerical simulations using measurements of the magnetic field variation within the diagnostic were used to obtain a realistic proton dispersion curve for the new NEPPS units. In conclusion, this procedure for obtaining each independent dispersion is applicable to all EPPS and NEPPS diagnostics, given the axial magnetic field profile.},

  doi          = {10.1063/1.5039388},

  journal      = {Review of Scientific Instruments},

  number       = 10,

  volume       = 89,

  place        = {United States},

  year         = {Mon Oct 01 00:00:00 EDT 2018},

  month        = {Mon Oct 01 00:00:00 EDT 2018}

}

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Works referenced in this record:

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Works referencing / citing this record:

First demonstration of ARC-accelerated proton beams at the National Ignition Facility
journal, April 2019

Mariscal, D.; Ma, T.; Wilks, S. C.
Physics of Plasmas, Vol. 26, Issue 4
DOI: 10.1063/1.5085787

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Similar Records

Title: Calibration of proton dispersion for the NIF electron positron proton spectrometer (NEPPS) for short-pulse laser experiments on the NIF ARC

Abstract

Citation Formats

Isochoric Heating of Solid-Density Matter with an Ultrafast Proton Beam journal, September 2003

XLVII. On rays of positive electricity journal, May 1907

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journal, September 2003

XLVII. On rays of positive electricity
journal, May 1907

Simulations of intense heavy ion beams propagating through a gaseous fusion target chamber
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High-energy (>70 keV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility
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Kinetic simulations of a deuterium-tritium Z pinch with >10 ¹⁶ neutron yield
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