Laser ion source development for the Columbia University microbeam


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    • IEEE  status
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      Views: (2003)   Date: (Publication Date: Feb 2002)   Pages: ()
    • Author:  Bigelow  A. W. Randers-Pehrson  G. Brenner  D. J. Center for Radiological Research  Columbia University  New York  New York 10032;  

    • Abstract:  Abstract A design is given of a laser ion source for the 4.2 MV Van de Graaff accelerator at the Columbia University Radiological Research Accelerator Facility (RARAF). The source has been designed with application in mind for the RARAF single-particle single-cell microbeam, though it will also be used for broad-beam irradiations. The operating principle, laser ablation, can produce heavy ions with high charge states so that their energies will be high enough to provide sufficient range-at least 20 ?m-for irradiating cells on a thin surface at atmospheric pressure. The laser ion source being implemented at RARAF is based on the laser operated ion source used by Hughes at the University of Arkansas and consists of three main components: laser generator, source vacuum chamber, and spherical electrostatic analyzer. © 2002 American Institute of Physics.

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