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Re: [MarlinTPC] PulseFinder questions and issues [message #1888 is a reply to message #1861] Tue, 10 November 2009 08:50 Go to previous messageGo to previous message
rosemann
Messages: 41
Registered: March 2009
Location: hamburg.de
OK, I'm still onto this processor. Doesn't seem to end.

First I've noticed some slightly confusing things, which I remedied (so far only in my private branch). Like the fact that the readout frequency is silently taken from a gear file, even it's not what you (might) want.

Anyhow, I have a pending question to which I need input: what time to store in the produced TrackerPulse collection?

The lcio documentation states only "The time of the pulse - arbitrary units." Now there are several answers to this question, and we somehow need to decide, which one we choose.

1) simply take the time bins (integer values); leave the fiddling with the electronics to the hit finding

2) take the "true" time by multiplying with the bin width; incorporating electronics information by the readout frequency. In which units then, nanoseconds?

3) take the z position (in mm) by also incorporating the drift velocity; leave then any field inhomogeneities as a correction afterwards

Please state your opinion.

Cheers,
Christoph



When you have eliminated the impossible, whatever remains, however improbable, must be the truth. (Sir A.C. Doyle in Sign of Four)
 
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