Temperature profiles of impacts

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Description

Similarity solutions determine the profiles of density and temperature from impacts, which determine the scaling of the temperature and optical depth on material parameters, time, screening, and impactor size. This note uses scaling results derived earlier for the growth, size, and temperature produced by impacts to discuss the radial temperature profiles they produce. While the plasmas cool in milliseconds, they offer unique information about the thermodynamic state and material properties of the target material. The brightness temperature can be estimated from known two-dimensional similarity solutions. Regions close to unit optical thickness contribute effectively to the radiation, hence, they determine the ... continued below

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13 p.

Creation Information

Canavan, G.H. May 1, 1997.

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Description

Similarity solutions determine the profiles of density and temperature from impacts, which determine the scaling of the temperature and optical depth on material parameters, time, screening, and impactor size. This note uses scaling results derived earlier for the growth, size, and temperature produced by impacts to discuss the radial temperature profiles they produce. While the plasmas cool in milliseconds, they offer unique information about the thermodynamic state and material properties of the target material. The brightness temperature can be estimated from known two-dimensional similarity solutions. Regions close to unit optical thickness contribute effectively to the radiation, hence, they determine the plasma brightness temperature. The estimates of temperature as a function of time can be combined with the estimates of the exit hole size to estimate the total observable signal, which should be readily observable from distances of hundreds of kilometers.

Physical Description

13 p.

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OSTI as DE97008146

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  • Other Information: PBD: May 1997

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  • Other: DE97008146
  • Report No.: LA-UR--97-1926
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/515997 | External Link
  • Office of Scientific & Technical Information Report Number: 515997
  • Archival Resource Key: ark:/67531/metadc691107

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 21, 2016, 10:09 p.m.

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Canavan, G.H. Temperature profiles of impacts, report, May 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc691107/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.