Author/Authors :
Brunner، نويسنده , , T. and Smith، نويسنده , , M.J. and Brodeur، نويسنده , , M. and Ettenauer، نويسنده , , S. and Gallant، نويسنده , , A.T. and Simon، نويسنده , , V.V. and Chaudhuri، نويسنده , , A. and Lapierre، نويسنده , , A. and Mané، نويسنده , , E. and Ringle، نويسنده , , R. and Simon، نويسنده , , M.C. and Vaz، نويسنده , , J.A. and Delheij، نويسنده , , Robert P. and Good، نويسنده , , M. and Pearson، نويسنده , , M.R. and Dilling، نويسنده , , J.، نويسنده ,
Abstract :
We present a description of the Radio Frequency Quadrupole (RFQ) ion trap built as part of the TITAN facility. It consists of a gas-filled, segmented, linear Paul trap and is the first stage of the TITAN setup with the purpose of cooling and bunching radioactive ion beams delivered from ISAC-TRIUMF. This is the first such device to be driven digitally, i.e., using a high voltage ( V pp = 400 V ), wide bandwidth ( 0.2 < f < 1.2 MHz ) square-wave as compared to the typical sinusoidal wave form. Results from the commissioning of the device as well as systematic studies with stable and radioactive ions are presented including efficiency measurements with stable 133Cs and radioactive 124,126Cs. A novel and unique mode of operation of this device is also demonstrated where the cooled ion bunches are extracted in reverse mode, i.e., in the same direction as previously injected.
Keywords :
RFQ confinement , Buffer-gas cooling , Titan , Digital ion trap , Reverse extraction
