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Re: FRS Calibration Issue [message #17766 is a reply to message #17756]

Fri, 16 January 2015 01:45

SMilne
Messages: 30
Registered: July 2014
Location: York

continuous participant

From: *dsl.in-addr.zen.co.uk

Hi Liliana!

Thanks for your response! No worries about the delay, I've actually been very busy with finishing off some other analysis and writing some papers. Smile

This response will actually take two posts due to an attachments limit, but at least it is (hopefully) good news.

Just to summarise, the issue is this, when using the TPCs for determining the x positions and therefore the A/Q we end up losing ~80% of the data because the TPCs are too slow (at least for the rates we were using). Therefore we want to use the scintillators, which are faster (although with a worse position resolution), to determine the A/Q. So in short, we are currently trying to calibrate the scintillator positions. The issues, as you will see in my second post, are indeed related to some weird FRS ToF issues, just as you suggested.

Just for your interest I have still produced the spectra which you asked for in case they still serve some purpose.
- TPC Position vs Sc21 dt left-right [raw] (for both the 1st calibration point and the last few runs of 46V)
- TPC Position vs Sc41 dt left-right [raw] (for both the 1st calibration point and the last few runs of 46V)
- TOF for all 4 calibration runs [calibrated] (on the same graph, including a range that covers all entries)

Attachment: 58Ni-Cal1-TPCvSc21-S2.png
(Size: 25.01KB, Downloaded 276 times)
Attachment: 58Ni-Cal1-TPCvSc41-S4.png
(Size: 36.20KB, Downloaded 283 times)
Attachment: 46V-L-TPCvSc21-S2.png
(Size: 50.12KB, Downloaded 278 times)
Attachment: 46V-L-TPCvSc41-S4.png
(Size: 68.66KB, Downloaded 266 times)
Attachment: 58Ni-ToF-All.png
(Size: 26.64KB, Downloaded 291 times)

[Updated on: Fri, 16 January 2015 02:12]

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[Message index]

		FRS Calibration Issue By: SMilne on Tue, 22 July 2014 19:14
		Re: FRS Calibration Issue By: mlcortes on Thu, 24 July 2014 09:48
		Re: FRS Calibration Issue By: SMilne on Thu, 24 July 2014 14:52
		Re: FRS Calibration Issue By: mlcortes on Thu, 24 July 2014 15:19
		Re: FRS Calibration Issue By: SMilne on Wed, 17 September 2014 14:22
		Re: FRS Calibration Issue By: mlcortes on Wed, 17 September 2014 14:34
		Re: FRS Calibration Issue By: SMilne on Wed, 17 September 2014 16:01
		Re: FRS Calibration Issue By: mlcortes on Fri, 19 September 2014 08:01
		Re: FRS Calibration Issue By: SMilne on Thu, 24 July 2014 18:06
		Re: FRS Calibration Issue By: SMilne on Fri, 19 September 2014 15:31
		Re: FRS Calibration Issue By: mlcortes on Sun, 21 September 2014 21:59
		Re: FRS Calibration Issue By: SMilne on Mon, 22 September 2014 19:50
		Re: FRS Calibration Issue By: mlcortes on Wed, 24 September 2014 00:10
		Re: FRS Calibration Issue By: SMilne on Wed, 24 September 2014 12:05
		Re: FRS Calibration Issue By: SMilne on Wed, 24 September 2014 12:14
		Re: FRS Calibration Issue By: mlcortes on Wed, 14 January 2015 09:35
		Re: FRS Calibration Issue By: SMilne on Fri, 16 January 2015 01:45
		Re: FRS Calibration Issue By: SMilne on Fri, 16 January 2015 01:53
		Re: FRS Calibration Issue By: mlcortes on Fri, 16 January 2015 13:49
		Re: FRS Calibration Issue By: SMilne on Fri, 16 January 2015 19:35
		Re: FRS Calibration Issue By: mlcortes on Mon, 19 January 2015 13:10
		Re: FRS Calibration Issue By: SMilne on Mon, 19 January 2015 19:08
		Re: FRS Calibration Issue By: mlcortes on Wed, 28 January 2015 10:10
		Re: FRS Calibration Issue By: SMilne on Tue, 10 February 2015 17:09
		Re: FRS Calibration Issue By: mlcortes on Thu, 12 February 2015 10:05
		Re: FRS Calibration Issue By: SMilne on Thu, 12 February 2015 13:59
		Re: FRS Calibration Issue By: mlcortes on Tue, 17 February 2015 12:06
		Re: FRS Calibration Issue By: SMilne on Tue, 17 February 2015 13:23
		Re: FRS Calibration Issue By: mlcortes on Tue, 17 February 2015 15:31
		Re: FRS Calibration Issue By: SMilne on Tue, 17 February 2015 17:20
		Re: FRS Calibration Issue By: mlcortes on Tue, 17 February 2015 17:29
		Re: FRS Calibration Issue By: SMilne on Thu, 26 February 2015 01:12
		Re: FRS Calibration Issue By: mlcortes on Mon, 02 March 2015 17:54
		Re: FRS Calibration Issue By: SMilne on Wed, 20 May 2015 12:19
		Re: FRS Calibration Issue By: SMilne on Fri, 22 May 2015 10:36
		Re: FRS Calibration Issue By: mlcortes on Fri, 22 May 2015 13:27

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