Author/Authors :
Zhang، نويسنده , , W. and Tu، نويسنده , , X.L. and Wang، نويسنده , , M. and Zhang، نويسنده , , Y.H. and Xu، نويسنده , , H.S. and Litvinov، نويسنده , , Yu. A. and Blaum، نويسنده , , K. and Chen، نويسنده , , X.C. and Hu، نويسنده , , Z.G. and Huang، نويسنده , , W.J. and Ma، نويسنده , , X.W. and Mao، نويسنده , , R.S. and Mei، نويسنده , , B. and Shuai، نويسنده , , P. and Sun، نويسنده , , B.H. and Yamaguchi، نويسنده , , T. and Xia، نويسنده , , J.W. and Xiao، نويسنده , , G.Q. and Xu، نويسنده , , X. and Yan، نويسنده , , X.L. and Yang، نويسنده , , J.C. and Yuan، نويسنده , , Y.J. and Zhou، نويسنده , , X.H. and Zhao، نويسنده , , H.W. and Zhao، نويسنده , , T.C.، نويسنده ,
Abstract :
Accuracy of nuclear mass measurements in storage rings depends critically on the accuracy with which the revolution times of stored ions can be obtained. In such experiments, micro-channel plates (MCP) are used as timing detectors. Due to large phase space of injected secondary beams, a large number of ions cannot be stored in the ring and is lost within the first few revolutions. However, these ions interact with the detector and can saturate the MCP and thus deteriorate its performance. In order to eliminate such effects, a fast, pulsed high-voltage power supply (PHVPS) has been employed which keeps the detector switched-off during the first few revolutions. The new detector setup was taken into operation at the Experimental Cooler-Storage-Ring CSRe in Lanzhou and resulted in a significant improvement of the detector amplitude and efficiency characteristics.
Keywords :
Isochronous mass spectrometry , Timing detectors , saturation effects , Micro-Channel Plates , Storage ring mass spectrometry
