User name Z. Chai
Log entry time 00:18:29 on June10,2000
Entry number 43299
keyword=Rate comparison between open and 6msr coll.
Run 1852 with 6msr coll. in both arms, good events ( with proton, tc_cor, vertex difference, m_miss cut) rate 8.3Hz.
Run 1857, both arm open coll. Good event rate 10.2Hz.
Rate increase 23% after taking out the collimator.