A Compact, permanent-magnet electron-beam ion trap for use at a synchrotron radiation or free-electron laser beamline

放射光、または自由電子レーザービームラインでの利用のための小型、永久磁石型電子ビームイオントラップの開発

Harries, J.; Bcking, T.*; Buchauer, L.*; Crespo Lpez-Urrutia, J.*

Harries, J.; Bcking, T.*; Buchauer, L.*; Crespo Lpez-Urrutia, J.*

To enable widespread use of electron beam ion traps, a new compact electron-beam ion trap (EBIT) using NdFeB permanent magnets has been designed and constructed. The magnetic field at the centre of the trap is around 0.7 T, and operation with several milliamps of current at energies of a few keV has been demonstrated. For optimal use at a lightsource an off-axis electron gun has been designed and is currently under construction. A design using in-vacuum pole-pieces is currently being built at SPring-8, which will offer field strengths of up to 1.2 T.