JLAB Discriminators: Difference between revisions
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Following changes were recommended to make that board suitable for CLAS12: | Following changes were recommended to make that board suitable for CLAS12: | ||
* remove preamplifiers (at least | * remove preamplifiers (at least reduce gain): can be done by not-installing some components; different amplifiers can be installed | ||
* | * mask outputs | ||
* add | * add test input: directly to digital side | ||
* individual channel thresholds | * individual channel thresholds | ||
* add second output connector (or high dense connector ?) | |||
* (individual already ?) programmable width/delay step: 8ns -> 4ns, the less the better | * (individual already ?) programmable width/delay step: 8ns -> 4ns, the less the better | ||
Revision as of 10:38, 4 June 2008
First version was developed by James Proffitt and is used in tagger system. It was tested by Sergey Pozdnyakov. Results of tests are presented on the next few slides:
Manual: pdf.
Following changes were recommended to make that board suitable for CLAS12:
- remove preamplifiers (at least reduce gain): can be done by not-installing some components; different amplifiers can be installed
- mask outputs
- add test input: directly to digital side
- individual channel thresholds
- add second output connector (or high dense connector ?)
- (individual already ?) programmable width/delay step: 8ns -> 4ns, the less the better
- 32-channel ???
- fast enough ???
- internal delay ??? (10-20 ns is Ok)
- thermodrift ???
As on October 11, 2007 the possibility of board redesign was discussed with Volker, Chris and Stan Majewski, and we are waiting for Stan's final word.
Nov 16, 2007 James responded, asking for details. Sergey responded to Volker and James.
Apr 16, 2008: waiting for management to find money to pay James to do a job.