Author/Authors :
Traykov، نويسنده , , E. and Beck، نويسنده , , M. and Breitenfeldt، نويسنده , , M. and Delahaye، نويسنده , , P. and De Leebeeck، نويسنده , , V. and Friedag، نويسنده , , P. and Herlert، نويسنده , , A. and Geeraert، نويسنده , , N. and Heirman، نويسنده , , W. and Lّnne، نويسنده , , P.-I. and Mader، نويسنده , , J. and Roccia، نويسنده , , S. and Soti، نويسنده , , G. and Tandecki، نويسنده , , M. and Timmermans، نويسنده , , M. and Thiboud، نويسنده ,
Abstract :
During the last several years the WITCH (Weak Interaction Trap for CHarged particles) experimental setup at ISOLDE has undergone various upgrades aiming at improvement of general performance. An essential innovation, a compact Radio Frequency Quadrupole (RFQ) ion cooler and buncher device, was designed and successfully commissioned as a part of the off-line tuning system of WITCH. The RFQ is coupled to the existing surface ionization ion source providing high intensity ion bunches (up to 107 ions per bunch) towards the pulsed drift tube and the Penning traps of WITCH. This achievement allows for loading and tuning of the Penning traps in the domain of space charge limits and grants off-line operation independently of the REX-ISOLDE ion source. The current upgrade allows for a more thorough and frequent testing with bunched stable ion beams of high intensities, which will be used for studying various systematic effects involved in experiments with radioactive ions.
Keywords :
beta decay , Penning traps , Ion trapping , Ion bunching , Ion Beam , Space charge , Buffer gas cooling , RFQ , Ion cooling
