Title of article :
A new atomic beam polarized ion source for the Triangle Universities Nuclear Laboratory: overview, operating experience, and performance
Author/Authors :
Clegg، نويسنده , , T.B. and Karwowski، نويسنده , , H.J. and Lemieux، نويسنده , , S.K. and Sayer، نويسنده , , R.W. and Crosson، نويسنده , , E.R. and Hooke، نويسنده , , W.M. and Howell، نويسنده , , C.R. and Lewis، نويسنده , , H.W. and Lovette، نويسنده , , A.W. and Pfutzner، نويسنده , , H.J. and Sweeton، نويسنده , , K.A. and Wilburn، نويسنده , , W.S.، نويسنده ,
Abstract :
A newly constructed source of polarized H± and D± ions is described. Atomic H or D beams from a dissociator with a cooled nozzle enter a system of two sextupole magnets and several radio-frequency transitions where they are focused and polarized. They enter a downstream electron-cyclotron-resonance-heated plasma ionizer from which positive ions are extracted. When negative ions are desired, they may be produced from the positive beam by charge-exchange in cesium vapor. Emerging beams are intense, have good polarization, low energy spread, and good optical quality. Descriptions are included for all major systems and for diagnostic procedures used to optimize both the intensity and the polarization of the output H± or D± beams obtained. Typical operating experience, performance figures, and a description of routine maintenance procedures are given.
