GSI Forum: NUSTAR PRESPEC » Position calculations on start/stop scintillators

Home » NUSTAR » NUSTAR PRESPEC » Position calculations on start/stop scintillators

Show: Today's Messages :: Polls :: Message Navigator

Position calculations on start/stop scintillators [message #18119]

Wed, 08 April 2015 18:24

LScruton
Messages: 3
Registered: July 2014

occasional visitor

From: *york.ac.uk

Hello,

I was wondering whether anyone could give some advice on getting the correct position information for the x-y hits on the LYCCA start scintillator. I currently have the "always_compute_position" parameter in the membrane.par file for the startToF set to zero, so it calculates the position of the interaction point from the PMT data only if there is no data available from the TPCs at S4. However, I get a very strange x-y map for the start scintillator as a result of this which I have attached.

The central region is generated by the extrapolation of the TPC data, and the odd region in the upper left of the x-y map is caused by the position calculation from the PMT data (i.e., when there is no TPC position data available). I can see that one can alter the shear and rotation of the computed position, which will help this odd region to align with the tracked positions from the TPCs, but don't have a clue how to do this.

Has anybody else had this problem?

Thanks,

Lianne

index.php?t=getfile&id=8356&private=0

Attachment: position_startScint.png
(Size: 31.49KB, Downloaded 717 times)

Report message to a moderator

[Message index]

		Position calculations on start/stop scintillators By: LScruton on Wed, 08 April 2015 18:24
		Re: Position calculations on start/stop scintillators By: miree on Thu, 09 April 2015 15:16
		Re: Position calculations on start/stop scintillators By: thuyuk on Thu, 07 May 2015 17:29
		Re: Position calculations on start/stop scintillators By: miree on Fri, 08 May 2015 11:23
		Re: Position calculations on start/stop scintillators By: miree on Mon, 11 May 2015 13:12
		Re: Position calculations on start/stop scintillators By: thuyuk on Tue, 12 May 2015 13:06
		Re: Position calculations on start/stop scintillators By: miree on Tue, 12 May 2015 15:24
		Re: Position calculations on start/stop scintillators By: thuyuk on Tue, 12 May 2015 15:39
		Re: Position calculations on start/stop scintillators By: miree on Tue, 12 May 2015 16:40
		Re: Position calculations on start/stop scintillators By: thuyuk on Wed, 13 May 2015 10:56
		Re: Position calculations on start/stop scintillators By: miree on Wed, 13 May 2015 14:56
		Re: Position calculations on start/stop scintillators By: thuyuk on Thu, 14 May 2015 12:07
		Re: Position calculations on start/stop scintillators By: miree on Fri, 15 May 2015 10:48
		Re: Position calculations on start/stop scintillators By: thuyuk on Tue, 19 May 2015 12:19
		Re: Position calculations on start/stop scintillators By: miree on Tue, 19 May 2015 14:29
		Re: Position calculations on start/stop scintillators By: miree on Wed, 20 May 2015 14:13
		Re: Position calculations on start/stop scintillators By: thuyuk on Thu, 21 May 2015 15:28

Previous Topic:	PRESPEC GEANT
Next Topic:	FRS Calibration Issue

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Nov 24 06:07:42 CET 2024

Total time taken to generate the page: 0.00891 seconds