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Re: LYCCA - w-DSSSD Time Gated [message #17176 is a reply to message #17175] Wed, 13 August 2014 15:24 Go to previous messageGo to previous message
mlcortes is currently offline  mlcortes
Messages: 41
Registered: July 2014
Location: Darmstadt
continuous participant
From: *ikp.physik.tu-darmstadt.de
Hi Tayfun,

We looked at the times of the WallDssd for the Pb data of 2012. As Michael mentioned, the times of the wall (only the p-side) are read by Multihit modules. What we did, and seems to work quite fine, is to select the first hit of this modules and use it as the input for the Dssd processor. By doing this I can see nice time-energy spectra for all the modules. This selection (for my data) removes the need of a time-energy gate, so you can keep using the normal DSSD processor. I think there you can see if you need an aditional gate for your case
Actually we see a double time structure that seems to come from the diferent electronic chain of the modules 19,20,23 and 24. If you see the same, let us know! We are still not sure about the origin of it.
The code I am using goes like this:
Before the DSSD processors I select the hit

processor Lycca/WallDssdPreproc  UTILS.HitPick	
	  input_array[0:127]  <-  LyccaWallCrate1.tdc[0:127]
#	  display out_first
end
processor Lycca/WallDssdPreproc1  UTILS.HitPick	
	  input_array[0:127]  <-  LyccaWallCrate2.tdc[0:127]
#	  display out_first
end


And after that I put the time input if the DSDD processor. Here i copy just an example of the module 01 with all the inputs and visualization

processor Lycca/WallDssd01 LYCCA.DSSSD
	   #triggers 8 9 10
 	amplitude_p[0:15]  <-  LyccaWallCrate1.adc01[0:15]
	amplitude_n[0:15]  <-  LyccaWallCrate1.adc01[16:31]
	 time_p[0:15] <- Lycca/WallDssdPreproc.out_first[0:15]
	display time_p				   in WallDssd/Module01/time_p
    	display amplitude_p 2048,0,4096            in WallDssd/Module01/amplitude_p
   	display amplitude_n 2048,0,4096            in WallDssd/Module01/amplitude_n
    	display multiplicity_p 32,0,32             in WallDssd/Module01/multiplicity
    	display multiplicity_n 32,0,32             in WallDssd/Module01/multiplicity
	 display multiplicity_t 32,0,32 		   in WallDssd/Module01/multiplicity
	display multiplicity_p:multiplicity_t      in WallDssd/Module01/multiplicity 32,0,32: 32,0,32
	display cluster_multiplicity_p 32,0,32     in WallDssd/Module01/cluster_multiplicity
   	display cluster_multiplicity_n 32,0,32     in WallDssd/Module01/cluster_multiplicity
   	display cal_amplitude_p:cal_amplitude_n    in WallDssd/Module01
   	display amplitude_p:amplitude_n            in WallDssd/Module01
   	display dE                                 in WallDssd/Module01
  	display cal_time_p 			   in WallDssd/Module01/cal_times
	display cal_time_p:cal_amplitude_p 	   in WallDssd/Module01
	display time_p_sum:dE_p   500,0,10000:500,300,4000  in WallDssd/Module01
end


The last spectra should show you a nice energy time plot. Hope this is useful for you and let us know if you have any problem


Li^2

[Updated on: Wed, 13 August 2014 15:27]

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