GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » NUSTAR » NUSTAR PRESPEC » Invalid Events in Prespec Code
Re: Invalid Events in Prespec Code [message #19456 is a reply to message #19455] Fri, 19 August 2016 15:45 Go to previous messageGo to previous message
a_boso is currently offline  a_boso
Messages: 16
Registered: July 2014
occasional visitor
From: 147.162.110*
Hi Michael,

thank you for your fast and precise reply!

I tried to check where the information starts to miss; but it seems it is a common feature of all the variables still from the beginning of the analysis.

For example if I take the processor


processor Frs/Scintillators/dEnergySc21  UTILS.Pair
          first <-  FrsCrate.qdc1[16]
          second <- FrsCrate.qdc1[17]
          display first:second        
          display first               
          display second              
end



which simply takes the "raw" values from the Frs Crate for Sc21 (but it is the same for Sc41 for example) and plots them I already see that that the "Frs_Scintillators_dEnergySc21__first_valid" variable is 0 90% of the time.

Since FRS scintillators are the "fastest" detectors we have I did not expect to have such a large amount of invalid events in them.
Moreover it seems that these events are invalid already when they come out from the Frs Crate; this is what I don't understand. What does it mean that raw values from the Crate are invalid?

Thank you very much, and sorry for bothering you!! Sad

Alberto
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: LYCCA ToF scintillators
Next Topic: Scalers in prespec software
Goto Forum:
  


Current Time: Sat Sep 18 06:04:27 CEST 2021

Total time taken to generate the page: 0.02460 seconds