The Effect of an Under-Dense Plasma Density Gradient on the Backstreaming Ion Mechanism

Details The Effect of an Under-Dense Plasma Density Gradient on the Backstreaming Ion Mechanism The Effect of an Under-Dense Plasma Density Gradient on the Backstreaming Ion Mechanism

2000-10-03

arxiv.org/abs/physics/0010009v1

eConf C00082 (2000) TUc07

Physics

Accelerator Physics

3 pages, 3 figures, LINAC 2000 TUC07

Scientific paper

The space charge limited emission of ions from a target in the focus of an intense relativistic electron beam is studied analytically for the case of a spatially varying target density profile. In particular, the emission in the presence of an under-dense plasma shelf in contact with the solid density target dramatically differs from the case of an abrupt solid-vacuum boundary. It is found that an under-dense gradient scale length several times that of the beam radius at the focus reduces the emission by at least an order of magnitude over that to be expected from a solid-vacuum boundary.

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