Development of the high-brightness ion source for accelerator applications

A helicon and a multicusp version of a radio-frequency ion source with compact permanent magnet systems for accelerator applications have been developed and tested to show the following performance data: plasma density of 1011 - 9·1012 cm-3, pressure of 2-10 mTorr, beam current densities of 10 - 130 mA/cm2, brightness ∼100 A/(m2rad2eV), energy spread 8-30 eV, and an rf power input into the plasma of 40 - 400 W. The design of a gas field ion source (GFIS) of the needle-in-capillary type operating at room temperature is proposed. A field ion emitter made on the nanostructured carbon basis is planned to be used in the source. (author)