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TY - CONF AU - Kolski, J.S. AU - Audia, J. AU - Bach, H.T. AU - Batygin, Y.K. AU - Bradley III, J.T. AU - Connors, M. AU - Engle, J.W. AU - Espinoza, E. AU - Figueroa, E. AU - Hall, M.J. AU - Martinez, M.P. AU - Nortier, F.M. AU - Reass, D. AU - Roybal, W. AU - Watkins, H.A. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Varying Amplitude Raster Pattern for High Power Isotope Production Targets J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - The Isotope Production Facility (IPF) at LANSCE produces medical radionuclides strontium-82 and germanium-68 by bombarding rubidium chloride and gallium metal targets respectively with a 100 MeV proton beam, 230 uA average current. Rastering the proton beam is necessary to distribute beam power deposited as heat in the target and allow for higher average beam current for isotope production. We currently use a single circle raster pattern with constant amplitude and frequency. In this paper, we demonstrate two different varying amplitude raster patterns (concentric circle and spiral) to achieve uniform target coverage and expose more target volume to beam heating. In this proof-of-principle experiment, we compare beam spot uniformity measured by irradiating films and foils for both raster patterns. PB - JACoW CP - Geneva, Switzerland SP - 2298 EP - 2300 KW - target KW - isotope-production KW - flattop KW - experiment KW - proton DA - 2015/06 PY - 2015 SN - 978-3-95450-168-7 DO - 10.18429/JACoW-IPAC2015-TUPWI028 UR - http://jacow.org/ipac2015/papers/tupwi028.pdf ER -