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Re: LYCCA ToF scintillators [message #19423 is a reply to message #18548]

Fri, 12 August 2016 15:35

Michael Reese
Messages: 9
Registered: August 2016

occasional visitor

From: *gsi.de

Hi,

By just plotting the x vs. y position as it comes from the ToF-scintillator, you will get a pattern of squares. The pattern comes from the gaps between the LYCCA modules.
If everything would be perfect, the lines in the pattern should be perpendicular. In practice they might look a bit sheard.
The "x_shear" and "y_shear" parameters are there to correct for that.

I hope the following schematic drawing makes it clear.

index.php?t=getfile&id=8739&private=0

In addition, the pattern might be shifted in x and y direction, and rotated. There are other parameters forseen to correct these errors.

Regards,
Michael

Attachment: shear_correction.png
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[Message index]

		LYCCA ToF scintillators By: a_boso on Wed, 07 October 2015 10:09
		Re: LYCCA ToF scintillators By: Michael Reese on Fri, 12 August 2016 15:35
		Re: LYCCA ToF scintillators By: SMilne on Fri, 12 August 2016 16:26
		Re: LYCCA ToF scintillators By: Michael Reese on Fri, 12 August 2016 17:20
		Re: LYCCA ToF scintillators By: Michael Reese on Fri, 12 August 2016 17:27
		Re: LYCCA ToF scintillators By: SMilne on Fri, 12 August 2016 17:32

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