Relevance of Plasma Science to Particle Accelerators ?

In following the theme of this Symposium, \Plasma Science and Its Applications," we may be suggesting to some readers that the \other" applications of Plasma Science somehow justify the existence of a eld traditionally devoted to fusion energy. In fact, we do not believe that plasma science can or should be justi ed for its spin-o contributions. Nevertheless, the unity of science would be seriously threatened by a precipitous decline in the support for plasma science. It is that unity which repeatedly has been veri ed as one looks for how advances in one eld are crucial to several other seemingly fundamentally di erent elds. Thus it is in this case, as a representative of the community of Particle Accelerator Scientists, that we show four signi cant areas in which the methods and the results of plasma science have been applied to Accelerator Science. We have deliberately skipped plasma ion sources which are perhaps the most obvious application of plasmas to accelerators. Two of our four examples are cases in which the computational methods of plasma science have been adopted, and two are examples in which the plasmas themselves are employed. One of each category are now actively in use and the other one in each category is being used to develop or design new devices. ? Work supported by Department of Energy contract DE{AC03{76SF00515. y Presented at the Fusion Power Associates Symposium, May 3{5, 1998, Washington. D.C.