Flexible, durable proton energy degraders for the GE PETtrace

J. W. Engle, K. Gagnon, Gregory Severin, H. F. Valdovinos, R. J. Nickles, T. E. Barnhart

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    In order to limit the formation of radioisotopic impurities during proton bombardments of solid targets, two methods of introducing degrader foils into the beam
    upstream of the target were tested. The first design uses a 445 μm thick fixed degrader machined from a single piece of aluminum. The second design permits introduction of foils made of any material and was tested with foils as thick as 635 μm (also aluminium). In both cases, the foils are cooled with by water flowing through an annular channel outside the radius of the beam. Both designs proved durable and tolerated proton beam currents in excess of 80 μA.
    Original languageEnglish
    JournalAIP Conference Proceedings - American Institute of Physics
    Issue number1
    Pages (from-to)25-29
    Publication statusPublished - 2012
    Event14th International Workshop on Targetry and Target Chemistry - Playa del Carmen, Mexico
    Duration: 26 Aug 201229 Aug 2012
    Conference number: 14


    Conference14th International Workshop on Targetry and Target Chemistry
    CityPlaya del Carmen


    • Cyclotron
    • Degrader
    • Proton energy
    • Solid target

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