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User name danez
Log entry time 03:52:58 on March 08, 2011
Entry number 350966
keyword=Prescales on White Board
The prescales on the white board in the counting house front room were
supposed to be changed for the carbon runs. Instead, they were still the
values from the deuterium runs, which explains why we were getting such
low rates with them.
After coordinating with the RC, an attempt was made to obtain the same
trigger rates as during the deuterium runs increasing the current to 10
μA and adjusting the prescales.
Starting with Run 2602, we will be using the following prescales:
- PS1: 120
- PS2: 50
- PS3: 7
- PS4: 1
- PS5: 1
- PS6: 5000
- PS7: 0
- PS8: 100
This gives us a total DAQ rate of 336 Hz with a deadtime of approximately
7%, similar to what was seen during the deuterium runs, though the T5
coincidence rate is only about 2 Hz.
A copy of this log entry has been emailed to: orchen, eip