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Proceedings Paper

Implementation of the next-generation Gas Cherenkov Detector at the National Ignition Facility
Author(s): J. A. Carrera; H. W. Herrmann; H. Y. Khater; A. C. Carpenter; B. V. Beeman; J. E. Hernandez; S. Sitaraman; F. E. Lopez; A. B. Zylstra; J. R. Griego; Y. H. Kim; S. A. Gales; C. J. Horsfield; J. S. Milnes; J. D. Hares
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Paper Abstract

The newest Gas Cherenkov Detector (GCD-3) diagnostic has completed its Phase I commissioning/milestone at the National Ignition Facility (NIF). GCD-3 was fielded for several years at the Omega Laser Facility in its initial configuration, before being moved to the NIF. Installation at the NIF involved optimization of GCD-3 for the higher background environment and designing a new insertion carrier assembly. GCD-3 serves as the initial phase towards the implementation of the “Super GCD” (SGCD) at the NIF. During this phase of development GCD-3 took measurements from a re-entrant well, 3.9 meters from target chamber center (TCC). Plans to insert GCD-3 within 20 cm of TCC with a Target and Diagnostic Manipulator (TANDM) will be discussed. Data was collected using a Photomultiplier Tube (PMT) in combination with a Mach-Zehnder based recording system. These measurements were used to aid in shielding analysis, validate MCNP models, and fuel design efforts for the SGCD. Findings from the initial data will be covered extensively, including an in-depth look into sources of background and possible mitigation strategies. Ongoing development of phase two, the addition of an ultra-high bandwidth Pulse Dilatation Photomultiplier Tube (PD-PMT), will also be presented.

Paper Details

Date Published: 21 September 2017
PDF: 10 pages
Proc. SPIE 10390, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI, 103900K (21 September 2017); doi: 10.1117/12.2276865
Show Author Affiliations
J. A. Carrera, Lawrence Livermore National Lab. (United States)
H. W. Herrmann, Lawrence Livermore National Lab. (United States)
H. Y. Khater, Lawrence Livermore National Lab. (United States)
A. C. Carpenter, Lawrence Livermore National Lab. (United States)
B. V. Beeman, Lawrence Livermore National Lab. (United States)
J. E. Hernandez, Lawrence Livermore National Lab. (United States)
S. Sitaraman, Lawrence Livermore National Lab. (United States)
F. E. Lopez, Los Alamos National Lab. (United States)
A. B. Zylstra, Los Alamos National Lab. (United States)
J. R. Griego, Los Alamos National Lab. (United States)
Y. H. Kim, Los Alamos National Lab. (United States)
S. A. Gales, Atomic Weapons Establishment (United Kingdom)
C. J. Horsfield, Atomic Weapons Establishment (United Kingdom)
J. S. Milnes, Photek Ltd. (United Kingdom)
J. D. Hares, Kentech Instruments Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 10390:
Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI
Jeffrey A. Koch; Gary P. Grim, Editor(s)

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