H/sup -/ injection into the low-energy booster of the SSC

Protons are accumulated into the low-energy booster of the SSC (Superconducting Super Collider) by utilizing H/sup -/ to H/sup +/ conversion in a 225- mu g/cm/sup 2/ carbon stripping foil. Synchronous injection is performed for 26 turns into stationary RF buckets, thereby allowing operation with variable bunch spacing. By injecting the beam offset in x and y, the required RMS normalized transverse emittance area of 0.75 pi mm-mr is obtained. Similarly, the required RMS longitudinal emittance area of 1.75 mu *10/sup -3/ eVs is obtained by injecting single linac micropulses, centered at phi =0 and dp/p=+0.12%, into each 49.9-MHz RF bucket formed with an RF voltage of 350 kV. The transverse space-charge tune shift is -0.17 for 10/sup 10/ protons/bunch accumulated at 600 MeV.<
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