Data Acquisition for This Run Accomplished

2009-08-12

  After passing the technical test on June 4th, BEPCII started J/ψ data acquisition. By 8 AM on July 28th, BEPCII had obtained 2 hundred million J/ψ events.  Compared to the 58 million J/ψ events BEPC had obtained in the 303 days from 1999 to 2000, BEPCII collected 2 hundred million in 54 days. It is estimated that the performance of BEPCII is 20 times higher than that of the BEPC.

  During the third phase of the BEPCII commissioning, its beam performance will be further improved and luminosity specifications will be met. A sound foundation will be laid for early physics results.

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