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Bug #8740

Eliminate cause of Vole-like chirping occurring on most channels when HV wire bias is turned on

Added by Matthew Toups about 4 years ago. Updated over 3 years ago.

Status:
Resolved
Priority:
Urgent
Assignee:
Michael Mooney
Category:
-
Start date:
05/12/2015
Due date:
% Done:

100%

Estimated time:
Duration:

Description

Determine course of action to follow up with tests to filter the HV ripple coming out of the MPod.

History

#1 Updated by Michael Mooney over 3 years ago

  • Assignee set to Michael Mooney
  • % Done changed from 0 to 100

On 10/19/2015, we confirmed that we could (nearly) eliminate the chirping problem at MicroBooNE. This was done by changing the leakage current setting on the ASIC's from 100 pA to 500 pA. The solution followed hardware tests at BNL lead by Hucheng Chen, motivating a test using the MicroBooNE DAQ. Follow-up analysis by Mike Mooney lead to the discovery that this change can reduce the chirping by a factor of 50 (to near-negligible levels, affecting 0.2% of channels per event on average).

#2 Updated by Michael Mooney over 3 years ago

  • Status changed from New to Resolved

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