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E-mail: bragin@inr.ru

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H BEAM EMITTANCE MEASUREMENTS IN TRASPORTATION CHANNEL OF INR LINAC

S.. Bragin, O.M. Volodkevich, V.A. Gaidash, Yu.V. Kiselev, V.S. Klenov, A.N. Mirzojan, A.V. Feschenko Expected application of H beams for proton therapy leads to serious requirements on the beam stability and emittance at linac entrance. Surface-plasma source with Penning geometry discharge chamber is used at H injector of INR Linac. In the most stable operation mode of H injector source the beam intensity at injector exit is about 10 mA. This is quite satisfactory for proton therapy requirements. H beam is injected into the transportation channel with the energy of 400 keV. The previous measurements of H beam emittance were carried out for maximum 5080 mA beam intensity and for up to 20 keV beam energy so it is important to measure the emittance for operation mode with the most stable beam parameters and 400 keV beam energy. H beam emittance was measured in beam transportation channel. The results of measurements are discussed .





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