Use of combined light flash and plasma measurements to study hypervelocity impact processes

Burchell, M.J. and Kay, L. and Ratcliff, P.R. (1995) Use of combined light flash and plasma measurements to study hypervelocity impact processes. In-Situ Impact Detection Techniques, Interplanetary Dust, and Future Mars Exploration, 17 (12). pp. 141-145. ISSN 0273-1177 . (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1016/0273-1177(95)00772-7

Abstract

We present new measurements concerning generation of light flash during hypervelocity impacts. We use iron particles (10(-13) to 10(-17) kg) with velocities over the range 1 to 42 km/s impacting semi-infinite targets (aluminium and molybdenum). The main results of previous work in the field are found to be reproduced with some slight deviations. For iron projectiles with given mass and velocity the energy of the flash (normalized to mass) is proportional to velocity to the power of 3.5 for aluminium targets and 3.9 for molybdenum targets. The duration of the flash is of order 1 microsecond. Simultaneous measurements of the generation of impact plasma do not change this. The onset of plasma generation of the bulk target material does not affect the total light flash energy. We discuss the duration of the flash compared to a simple calculation of temperature in the target and plasma vs time.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: Mark Burchell
Date Deposited: 24 Oct 2009 11:16
Last Modified: 20 May 2011 23:52
Resource URI: http://kar.kent.ac.uk/id/eprint/5031 (The current URI for this page, for reference purposes)
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