[Halld-cal] Hot BCAL channels

[David Lawrence]

Hi Tegan,

Here’s a simple way to do it with the DAQTreeBCAL plugin:

> hd_root -PPLUGINS=DAQTreeBCAL ~/HallD/RAWDATA/hd_rawdata_002180_001.evio
> root -l hd_root.root
root [1] BCALdigi->MakeSelector()
root [2] .q

< edit the BCALdigi.C file to contain the following in the Bool_t BCALdigi::Process(Long64_t entry) method >

Bool_t BCALdigi::Process(Long64_t entry)
{
   GetEntry(entry);
   
   int Nbins = waveform->size();
   char title[256];
   sprintf(title, "Event %d  ROC:%d SLOT:%d CHAN:%d", eventnum, rocid, slot, channel);
   TH1D *h = new TH1D("h", title, Nbins, 0.0, (double)Nbins);
   for(unsigned int ibin=1; ibin<=Nbins; ibin++) h->SetBinContent(ibin, waveform->at(ibin-1));

	h->Draw();
	c1->Update();
	cout << "Press Enter to Continue";
	cin.ignore();
	delete h;

   return kTRUE;
}


> root -l hd_root.root
root [1] BCALdigi->Process("BCALdigi.C")


That’s it. Now you know how to fish.


Regards,
-David


 
On Mar 20, 2015, at 4:56 PM, beattite <beattite at uregina.ca> wrote:

> Hello.
> 
> I was trying to look into the effects of a few of the BCAL TDC scalars 
> giving much higher event rates (up to 20x higher) than the average [see 
> https://logbooks.jlab.org/entry/3327357].  The initial idea was to check 
> out things like the pedestal and pulse integrals for these channels to 
> confirm that we see something like this increased rate in the ADCs as 
> well.
> 
> I looked at a run from the day after the logbook entry was posted 
> (Run002649) first.  Looking through the pedestal histograms for each 
> channel, I don't see the three 'hot' channels in terms of number of 
> pedestal events.
> 
> I also looked at the DAQTreeBCAL plugin output to look at the number of 
> events recorded for each channel by BCALDigiHit.  Again, I don't see any 
> high-event channels.  We were going to look at the pulse integral 
> distributions to see if they showed something interesting, and we also 
> wanted to look at the raw waveforms from some Mode 8 data.
> 
> Is there a plugin somewhere that I could grab that would allow us to 
> look at the waveforms easily?  As in, is there an easy way to visually 
> inspect waveforms for specific channels?
> 
> Thanks.
> _______________________________________________
> Halld-cal mailing list
> Halld-cal at jlab.org
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