| 'timeouts' problem fixed [message #10459] |
Tue, 23 March 2010 19:37  |
Gianluigi Boca
Messages: 177
Registered: March 2004
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first-grade participant |
From: *gsi.de
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hallo,
the problem of some events taking too much time for processing with the STT real Patter Recognition has been solved.
As expected, it was caused by 'bad' events in which some very low momentum particles - probably delta rays - originated along the 'main' tracks.
These low momentum tracks continued to spiralize many times into the STT system producing typically 100 hits in few straws.
The PR algorithm then essentially goes nuts. It is not a matter of this particulary algorithm, any algorithm would fail in these situations.
I choose to reject those hits produced by spiralization simply by excluding those straws with multiple hits from the PR.
Noe the situation is back to normal.
Please update your stt directory
Gianluigi
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