Role of particle charge in impact ionization by charged microparticles

Burchell, Mark J. and Cole, Mike J. and McDonnell, J.A.M. (1998) Role of particle charge in impact ionization by charged microparticles. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 143 (3). pp. 311-18. ISSN 0168-583X. (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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The role of particle charge in generating ionization of projectile and target in impacts of iron microparticles on copper has been investigated at impact velocities above 1 km s(-1). Charged microparticles are accelerated in an electrostatic accelerator and their surface charge subsequently reduced in flight by passage through a thin conducting film. It is found that a reduction in projectile charge of 80% at 5 km s(-1) reduces noticeably the degree of impact ionization. This supports the recent assertion that heating due to current flow between the particle and target immediately prior to impact may play a significant role in impact ionization at such velocities.

Item Type: Article
Uncontrolled keywords: hypervelocity; impact; ionization
Subjects: Q Science
Q Science > QC Physics
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: I. Ghose
Date Deposited: 05 Apr 2009 09:31
Last Modified: 14 May 2014 15:14
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