Debuncher developing for H and D beams injection into cosy ring

Abstract

In case of superi-onducting injector in synchrotron due to high accelerating gradient the energy spread of beam after linac exceeds the longitudinal acceptance of ring. The problem becomes even more difficult, when we need to inject two beams with different chargel mass ratio. We consider the problem when H-andD-particles are injected and ratio of mass to charge differs by a factor of two. Both beams will he injected into ring at an approximately similar energy SO MeV. To fulfill the monochromatization requirement the momentum spread of H and D beams has to be decreased from &plp=_+(5+8).10" [I] to A p / p =~I . S~l O " , or in special case A p l p =k7.S.10d by the debuncher system optimized for both sorts of particle simultaneously. For this purpose the E and H debuncher types are considered. PHASE ADVANCE ADJUSTMENT.The first and obvious possibility is to adjust the advanced phase o -e i n the longitudinal plane of whole linear accelerator and rotate the phase portrait to get Lonl,"ll.l P h l Y Prnl.ll0, slim "I ii.lllmpl,i"drIIcmllln( hrn, .n.,W--'incllS:~on,, ns