AGS heavy ion operation with the new booster

摘要

The AGS Complex has completed its second year of operation with heavy ion beams injected from the Booster for fixed-target research. The booster accepts Au(sup 33+) ions at about 1 MeV/nucleon from the Tandem Van der Graaff and accelerates them to a final energy of about 192 MeV/nucleon. The extracted Au(sup 33+) beam is stripped to Au(sup 77+) before injection into the AGS. Substantial experience has been gained in the areas of injection, acceleration, vacuum, and stripping processes. Deliberately introduced coupling during injection resulted in 50% more beam and a much smaller emittance. A second rf system, for low frequency operation, reduced the vacuum losses and the number of harmonics switches required. Efficiency of stripping of Au(sup 33+) into Au(sup 77+) and various final charge states have been performed as a function of Au(sup 33+) final energy. At the end of the 1993 running period, the maximum intensity achieved in the AGS was about 3 (times) 10(sup 8) nuclei-per-pulse (NPP) of Au(sup 77+) at a kinetic energy of 10.2 GeV/nucleon. In the fall of 1995, a new fast extraction system and beam transport line for RHIC injection will be commissioned. The plan for raising intensity and reducing emittance for RHIC injection will also be presented. (ERA citation 19:030651)