Log entry time 08:49:46 on June 14, 2009

Entry number 281274

Here is a short summary regarding the calibration runs with reference 
cell, that we took in the end of the OWL shift:

  Gas  |  Required num of T3 ev. | T3 rate | Ps. T3 rate | Estimated time
--------------------------------------------------------------------------
  3He  |            1M           |  7.5kHz |  1875Hz     |  9min      
 Empty |            0.5M         |  4.5kHz |  1125Hz     |  7.4 min
  H2   |            2M           |  7.3kHz |  1825Hz     |  18min
  N2   |            2M           |  9.2kHz |  2300Hz     |  15min

Prescale factor for T3 was set to PS3 = 4. The beam current was 
approx. 14uA. 

In order to get the correct number of T3 events for each runs we
considered beam trips and appropriately extended the length of each
run. Therefore are runs few minutes longer than planned.     

#3584 : 3He  : 12min
#3585 : Empty: 16min
#3586 : H2   : 23min
#3587 : N2   : 20min