Author/Authors :
A. Kellerbauer، نويسنده , , G. Bollen، نويسنده , , J. Dilling، نويسنده , , S. Henry، نويسنده , , F. Herfurth، نويسنده , , H.-J. Kluge، نويسنده , , E. Lamour، نويسنده , , R.B. Moore، نويسنده , , C. Scheidenberger، نويسنده , , S. Schwarz، نويسنده , , G. Sikler، نويسنده , , J. Szerypo، نويسنده ,
Abstract :
A linear radio-frequency quadrupole ion guide and beam buncher has been installed at the ISOLTRAP mass spectrometry experiment at the ISOLDE facility at CERN. The apparatus is being used as a beam cooling, accumulation, and bunching system. It operates with a buffer gas that cools the injected ions and converts the quasicontinuous 60-keV beam from the ISOLDE facility to 2.5-keV beam pulses with improved normalized transverse emittance. Recent measurements suggest a capture efficiency of the ion guide of up to 40% and a cooling and bunching efficiency of at least 12% which is expected to still be increased. The improved ISOLTRAP setup has so far been used very successfully in three on-line experiments.
Keywords :
mass spectrometry , Atomic masses , Radioactive ion beams , Ion trap , Buffer gas cooling , Ion guide
