The proposed injection system for an asymmetric B factory in the PEP tunnel

The proposed asymmetric energy B factory to be built in the PEP (Positron-Electron Project) tunnel will require a highly effective and profuse source of low-emittance electron and positron bunches. The specifications and required parameters of the injection system are shown. The B factory will consist of two rings of equal size, a 9 GeV electron ring and a 3.1 GeV positron ring, each with 1658 bunches, and with total circulating currents of 1.5 and 2.1 A, respectively. As the luminosity lifetime of the collider is expected to be about 2 h, the injector should be capable of filling the rings in a small fraction of an hour. With some simple modifications, the SLC linac with its damping rings and positron source is ideally suited to fulfil this function effectively. The injector will consist of the first 19 sectors of the linac the two damping rings, and the positron source. The overall injection system is described.<>