If a charged particle bunch propagates near a plasma-vacuum boundary, it excites a surface wave and experiences a force caused by the boundary. For the linearly responding plasma and ultra-relativistic bunch, the spatial distribution of excited fields is calculated, and the force exerted on a short and narrow bunch is approximated by elementary functions. The force attracts the bunch to the boundary, if the bunch is in the vacuum, and repels otherwise. There are also additional focusing and defocusing components of the force.

中文翻译：

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施加在等离子体-真空边界附近传播的粒子束上的力

如果带电粒子束在等离子体 - 真空边界附近传播，它会激发表面波并受到边界引起的力。对于线性响应等离子体和超相对论束，计算了激发场的空间分布，并用初等函数近似了施加在短而窄的束上的力。如果束在真空中，则力会将束吸引到边界，否则会排斥。力还有额外的聚焦和散焦组件。