Simultaneous beams of different energy from LAMPF

TL;DRAbstract

The linac of the Clinton P. Anderson Meson Physics Facility (LAMPF) was designed to accelerate simultaneous H/sup +/ and H/sup -/ beams to energies up to a maximum energy of 800 MeV. To allow more flexibility to the experimental program, it is desirable to find an operating mode such that the H/sup -/ beam may be accelerated to a lower output energy than the H/sup +/ beam. There are two possible approaches for doing this. In one approach, the beams could time-share the rf pulses, with the radio frequency adjusted to provide the desired energy for each beam separately. In the other approach, which will be the one discussed in this paper, both beams use all of the rf pulses, and the H/sup -/ beam is kicked out of the accelerating bucket when the desired lower energy is reached. This paper discusses a possible method of separating the H/sup -/ and H/sup +/ beams in longitudinal space (energy, phase), and summarizes dynamics calculations for various proposed schemes for kicking the H/sup -

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