2015 Accelerators Article Beams ICNCT16 Physics

Modification of the argon stripping target of the tandem accelerator

Applied Radiation and Isotopes, 2015

Authors:   A. Makarov,Yu. Ostreinov,S. Taskaev,P. Vobly,
Journal: Applied Radiation and Isotopes
Abstract: The tandem accelerator with vacuum insulation has been proposed and developed in Budker Institute of Nuclear Physics. Negative hydrogen ions are accelerated by the positive 1MV potential of the high-voltage electrode, converted into protons in the gas stripping target inside the electrode, and then protons are accelerated again by the same potential. A stationary proton beam with 2MeV energy, 1.6mA current, 0.1% energy monochromaticity, and 0.5% current stability is obtained now. To conduct Boron Neutron Capture Therapy it is planned to increase the proton beam current to at least 3mA. The paper presents the results of experimental studies clarifying the reasons for limiting the current, and gives suggestions for modifying the gas stripping target in order to increase the proton beam current along with the stability of the accelerator.