Hypervelocity impact studies using the 2 MV Van de Graaff accelerator and two-stage light gas gun of the University of Kent at Canterbury

Burchell, Mark J. and Cole, Mike J. and McDonnell, J.A.M. and Zarnecki, John C. (1999) Hypervelocity impact studies using the 2 MV Van de Graaff accelerator and two-stage light gas gun of the University of Kent at Canterbury. Measurement Science & Technology, 10 (1). pp. 41-50. ISSN 0957-0233. (doi:https://doi.org/10.1088/0957-0233/10/1/011) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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http://dx.doi.org/10.1088/0957-0233/10/1/011

Abstract

The hypervelocity impact facilities of the University of Kent are described. They comprise a 2 MV Van de Graaff accelerator for the electrostatic acceleration of dust particles (mass 10(-19)-10(-13) kg and velocities 0.5-90 km s(-1)) and a two-stage light gas gun firing millimetre-sized particles at 1-5.7 km s(-1). Results for impact ionization studies using iron dust accelerated in the Van de Graaff and hitting a variety of metal targets (gold, silver, indium, iron, rhodium and molybdenum) are presented. Over the range 2-80 km s(-1),the ionization yields are found to be similar to within a factor of 20 at low velocity and converge to within a factor of five at high velocity. The light gas gun is used to investigate the volumes of craters in metal targets for impacts of 1 mm diameter stainless steel spheres on aluminium at velocities in the range 2-5 km s(-1). For normal incidence the crater volume scales with the square of the impact velocity. For oblique impacts at a fixed velocity (5 km s(-1)) it is found that the crater volume scales with the cosine of the impact angle.

Item Type: Article
Uncontrolled keywords: hypervelocity; impact; ionization
Subjects: Q Science
Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Faculties > Sciences > School of Physical Sciences
Depositing User: Mark Burchell
Date Deposited: 05 Dec 2013 12:16 UTC
Last Modified: 12 Jun 2014 14:37 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/37212 (The current URI for this page, for reference purposes)

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