Webb, T. and Beezhold, W. and DeVeaux, L. C. and Harmon, F. and Petrisko, Jill E. and Spaulding, R. and Assink, R. (2005) Photonuclear and radiation effects testing with a refurbished 20 MeV medical electron linac. In: 2005 Particle Accelerator Conference (PAC05), 16-20 May 2005, Knoxville, TN, USA.
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An S-band 20 MeV electron linear accelerator formerly used for medical applications has been recommissioned to provide a wide range of photonuclear activation studies as well as various radiation effects on biological and microelectronic systems. Four radiation effect applications involving the electron/photon beams are described. Photonuclear activation of a stable isotope of oxygen provides an active means of characterizing polymer degradation. Biological irradiations of microorganisms including bacteria were used to study total dose and dose-rate effects on survivability and the adaptation of these organisms to repeated exposures. Microelectronic devices including bipolar junction transistors (BJTs) and diodes were irradiated to study photocurrent from these devices as a function of peak dose rate with comparisons to computer modeling results. In addition, the 20 MeV linac may easily be converted to a medium energy neutron source which has been used to study neutron damage effects on transistors.
|Item Type:||Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)|
|Additional Information:||Author's version deposited in accordance with the copyright policy of the publisher. © 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purpose or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.|
|Uncontrolled Keywords:||bacteria; irradiation; isotopes; medical applications; microelectronics; radiation effects; photonuclear activation; polymer degradation|
|Depositing User:||ePrints Administrator|
|Date Deposited:||26 Mar 2010 07:16|
|Last Modified:||02 Jul 2013 23:43|
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