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Errors in SttHi [message #14875] Wed, 19 June 2013 15:05 Go to previous message
Tobias Stockmanns is currently offline  Tobias Stockmanns
Messages: 489
Registered: May 2007
first-grade participant
From: *ikp.kfa-juelich.de
Dear STT code developers,

I had a look into the hit errors stored in the STTHit.

The x,y,z coordinates given in the SttHit are the wire mid-position. The error given for them is 0.5 in x and y while in z it is 3 cm. In my opinion the error should be 1 / Sqrt(12) for x,y and tube length / Sqrt(12) for the z coordinate. Can you please check this?

When looking at the isochrones, these values are still given as a radius in cm with an error in cm. For the time-based simulations it is necessary to have a method to translate the stored time stamp (or time pulse) into a radius including error by giving the event time with error.

Cheers,

Tobias
 
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