CDF RUN II COMMISSIONING

Silicon Task Force

This Task Force was built at the end of September 2002 in order to deal with the increasing number of failures appearing on the CDF RUN II Silicon detector

This Task Force is part of the Silicon Commissioning and Operations

For suggestions and questions send e-mail to: Gino Bolla

Here is a list of our reports:

As can be seen from the plot above starting on March 2002 a new set of failures started to show up in the CDF RUN II Silicon detector. As a consequence of these failures on 07/11/2002 a limit of 12 KHz on the L1A rate has been imposed by the Silicon group to the CDF experiment.

The failures are of 2 separate nature and symptoms:

 
List of Failures in chronological order.
Device Date of failure Time Stamp Type of failure Run Number L1A rate Anomalous Trigger conditions Beam in the Machine Magnet
SB4W9L4 03/18/2002 15:14:51 Jumper 141190 3.4 KHz NO YES ON
SB0W2L2 03/24/2002 00:34:08 Jumper 141571 3.5 KHz NO YES ON
SB3W8L0 05/08/2002 18:53:35 Jumper 144562 16 KHz YES NO ON
SB5W5L0 05/08/2002 18:56:02 Jumper 144562 16 KHz YES NO ON
SB5W4L2 06/16/2002 10:11:14 DOIM 146652 17 KHz YES NO ON
IB1W1L4 06/27/2002 12:08:37 DOIM 147267 16 KHz YES Some (No collisions) ON
SB4W10L4 06/27/2002 12:25:26 Jumper 147267 16 KHz YES Some (No collisions) ON
SB0W7L4 09/03/2002 23:51:58 Jumper 150948 5-7 KHz YES YES ON
SB0W3L3 09/03/2002 23:54:09 Jumper 150948 5-7 KHz YES YES ON
SB5W3L1 09/03/2002 23:58:37 Jumper 150948 5-7 KHz YES YES ON
SB5W7L0 09/04/2002 00:35:41 Jumper 150948 5-7 KHz YES YES ON
SB2W9L0 09/15/2002 12:02:27 Jumper 151557 3-4 KHz NO YES ON
SB0W4L4 09/27/2002 04:32:05 Jumper 152125 3-4 KHz NO YES ON
SB1W3L4 10/05/2002 10:28:55 Jumper 152515 7-8 KHz NO YES ON
 

There are 4 lines of investigation being pursued at this time:

Other documents and link to related work:

Last Updated Oct 13, 2002 by Gino Bolla
Gino Bolla