Implications of high-energy photons and electrons on target preheat at Z

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High-energy photons and electrons on the Z accelerator will deposit energy into a capsule and fuel; this may create a potential preheat problem for ICF. In this paper the authors discuss heating of the capsule and fuel by high-energy photons and electrons. The fuel is heated to <2 eV, in a time-integrated sense, on Z by these particles. Because peak implosion occurs at the peak in the soft x-ray emission on Z, the heating at times of interest is reduced roughly an order of magnitude to {approximately}0.2 eV for times of interest and fuel preheat from this mechanism is concluded ... continued below

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8 p.

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Derzon, M.; Nash, T. & Chandler, G. June 1, 1998.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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High-energy photons and electrons on the Z accelerator will deposit energy into a capsule and fuel; this may create a potential preheat problem for ICF. In this paper the authors discuss heating of the capsule and fuel by high-energy photons and electrons. The fuel is heated to <2 eV, in a time-integrated sense, on Z by these particles. Because peak implosion occurs at the peak in the soft x-ray emission on Z, the heating at times of interest is reduced roughly an order of magnitude to {approximately}0.2 eV for times of interest and fuel preheat from this mechanism is concluded to be small. These estimates are generated from time-integrated bremsstrahlung measurements. The uncertainty in the heating is high because the electron spectrum is not known directly, but inferred. In addition the influence of the particles between 5 keV and 60 keV is not known. Given the uncertainties the authors do not know the impact on the feasibility of internal dynamic hohlraums on z-pinch driven ICF implosions on X-1. The authors discuss these issues and suggest directions for further study.

Physical Description

8 p.

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INIS; OSTI as DE98005526

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  • 12. topical conference on high-temperature plasma diagnostics, Princeton, NJ (United States), 7-11 Jun 1998

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  • Other: DE98005526
  • Report No.: SAND--98-0556C
  • Report No.: CONF-980605--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 672040
  • Archival Resource Key: ark:/67531/metadc704756

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  • June 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 14, 2016, 4:05 p.m.

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Derzon, M.; Nash, T. & Chandler, G. Implications of high-energy photons and electrons on target preheat at Z, article, June 1, 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc704756/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.