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    User name xqian

    Log entry time 02:20:10 on November 02, 2008

    Entry number 246091

    This entry is a followup to: 246089

    keyword=some thinkings

    The amount of multi-tracks are huge with huge rates in the first two chambers. The shielding in front of the chamber-3 works pretty well to shield the low energy stuff. The overall tracking efficiency is pretty stable. With the shower's help, the multi-track should not be a problem for the 3He running. The background rates of the LH2 is comparable to the 3He production situation (same order of magnitude). With BigBite magnetic field going up, the tracking efficiency increases. With the beam current going up (background going up), the tracking efficiency decreases. This is a shortage of the tracking code now, which can be fixed later.