DEVELOPMENT OF HIGH-SPEED MULTICHANNEL SCALAR USING LINE MEMORIES

A high speed multichannel scaling mode time analyzer (MCS) for time of Eight (TOF) experiments was developed by using high speed serial acce ss memories and a personal computer. The MCS was composed of two memor y banks, run alternately for each trigger. The channel width of the MC S was selected from 50 ns to 200 ns (4 stage). The count per channel p er trigger signal was one, but the dead time for channel advancing may approach zero. The MCS was tested with linear accelerator (linac)-TOF experiments. The results agreed satisfactorily with the design goal. It was confirmed that the high speed MCS runs normally. A small discre pancy at high energy channels between the time spectrum of the MCS and that of the time-to-pulse-height converter (TPHC)-multichannel pulse height analyzer (PHA) time analyzer was observed. One of the reasons f or the discrepancy was the uncertainty of the MCS start time after the bigger signal by linac because of asynchronous crystal oscillations w ith the linac trigger signal.