A possible design for the NLC e sup + source

The Next Linear Collider (NLC) currently under investigation at SLAC requires a positron source with a flux of about 8.6 {times} 10{sup 13} particles per second, 14.4 times more than the SLC source. Based on the SLC experience, a source for NLC is proposed that can be realized with present accelerator technology. It consists of a 7 GeV S-band electron linac, a solid moving target, a 1.8 GeV L-band positron accelerator and a pre-damping ring with a large acceptance. The pre-damping ring performs positron accumulation and the matching of the positron source emittance to the NLC main damping ring acceptance. The scheme and parameters of the NLC positron source are given and the expected source performance is computed.