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Re: Forward spectrometer tracking [message #8742 is a reply to message #8739]

Tue, 02 June 2009 15:43

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *kph.uni-mainz.de

Dear Christian,

That is surely great idea!
I would be really happy, if I can join this subject and if there are no other argument. I will try to give some small contribution for the forward spectrometer tracking.

I would like to discuss dch and gem standalone tracking.
If I look and run dch tracking macro, i have very reasonable spectra. you can also find dch_mom.eps _theta.eps _resolution.eps
and xyview.eps, that are defined by dch tracking.
Blue one is reconstruced from dch tracking, red for generated one in one dimension plot.
x and y units in 2D plot are [m] meter.

But if I have tested gem alone, the result is changing dramatically. I have a look all hits information, which is prepared in GEM macro, most of hits are dedicated near the 0.5cm radius in 4 station GEM, however identified tracking in GEM are located far way at roughly 50cm.
As well as reconstruction efficiency are quite bad.
Roughly 20% events are only reconstruced in GEM stations.
I think that GEM has some problem in the tracking.

Could you confirm this?

Best wishes,
Donghee Kang from Mainz

Attachment: dch_mom.eps
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Attachment: dch_theta.eps
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Attachment: dch_resolution.eps
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Attachment: dch_xyview.eps
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Attachment: gem_xyview.eps
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[Message index]

		Forward spectrometer tracking By: donghee on Tue, 02 June 2009 14:13
		Re: Forward spectrometer tracking By: StefanoSpataro on Tue, 02 June 2009 14:25
		Re: Forward spectrometer tracking By: Anonymous Poster on Tue, 02 June 2009 15:04
		Re: Forward spectrometer tracking By: donghee on Thu, 04 June 2009 19:30
		Re: Forward spectrometer tracking By: donghee on Tue, 02 June 2009 15:11
		Re: Forward spectrometer tracking By: Aleksandra Wronska on Tue, 02 June 2009 15:33
		Re: Forward spectrometer tracking By: donghee on Thu, 04 June 2009 13:29
		Re: Forward spectrometer tracking By: Radoslaw Karabowicz on Thu, 04 June 2009 17:33
		Re: Forward spectrometer tracking By: donghee on Tue, 02 June 2009 15:43
		Re: Forward spectrometer tracking By: Radoslaw Karabowicz on Wed, 03 June 2009 16:03
		Re: Forward spectrometer tracking By: donghee on Wed, 03 June 2009 16:40
		Re: Forward spectrometer tracking By: Radoslaw Karabowicz on Thu, 04 June 2009 17:44
		Re: Forward spectrometer tracking By: donghee on Thu, 04 June 2009 18:18

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