Minutes of the ST-testbeam run, July 5th, 2004.


- Next meeting will be at 15:00, Tuesday, July 6th.

Summary from Sunday till Monday 8am:

- beam conditions did not improve during Sunday,
  as a consequence, the data taking efficiency is only
  ~50%.

- Initial HV & delay scans have been completed,
  analysis is in progress.

First preliminary conclusions:

- We need to be able to set the HV for the irradiated
  sensor to higher values than is possible with the regular
  power supply, therefore we will switch from the computer-controlled
  supply to a manually controlled supply.

- From the delay-time scan analysis it is concluded that the
  outer two points (84ns and 126ns) can be dropped for future
  scans.

- The sampling point of the Beetle1.2, reading out the CMS
  reference sensor, may be off.

Plans:

  For Monday: - finish preliminary analysis of HV & delay time scans
              - switch power supply of irradiated sensor
              - cross-check the timing of the sampling point of
                the reference CMS ladder.

  For Wednesday: - try to implement the cooling fan into the measurement
                   box. In case there is sufficient time, we can then
                   also take data with the 30-year irradiated sensor.

  For any day before the end of our testbeam period:
  Measure the jitter from the trigger.


Regards,



	Johan