A STUDY OF SPEAR AS A DEDICATED SOURCE OF SYNCHROTRON RADIATION

We have studied the potential of SPEAR as a dedi-cated source of synchrotron radiation, based on the ex-pectationthat SPEAR will become increasingly available for this purpose as PEP, the 18-GeV colliding-beamstor-age ring now under construction by LBL and SLAC, becomes operational. A synchrotron radiation research program has been underway since May, 1974. Twobeamportscapable of serving9 simultaneous users are now operational. In single-beam multi-bunch operationhighcurrents are pos-sible (225mA has been achievedand k 300 mAis expect-ed) and the electron beam emittance can be made smaller, resulting in higher source point brightness. Descrip-tions aregivenof SPEAR capabilities and of plans to ex-pand the research capability by adding beam runs and by inserting wiggler magnets in SPEAR straight sections. I