[Nps] [New Logentry] Updated NPSLib and nps_replay in JLab git repo and on cdaq

jones at jlab.org jones at jlab.org
Sat Oct 14 14:50:02 EDT 2023


Logentry Text:
--
Made modification to NPSLib to correct the NPS cal ADC times for the
HMS hodoscope start time. Also added code to get all trigger type
in the VTP tree.
Updated the nps_replay directory detials below. Main change
is offsets in the FADC pulse time for each block by Peter.
With these change one can see the 2ns beam structure in the FADC pulse time ( sigma around 0.7ns)
and the NPS cluster time ( sigma around  0.45ns)

Add code to use Hodoscope starttime THcNPSArray 
    Updated THcNPSArray::Init to initilize the hodoscope
    Updated THcNPSArray::FillADC_DynamicPedestal
    to uncomment
    if( fglHod ) StartTime = fglHod->GetStartTime();
    
    hodoscope start time is centered around 50ns.
    hardcoded this 50ns offset.
    fGoodAdcPulseTime.at(npad) = pulseTime-(StartTime-50);
    
    Also set the
    frAdcPulseTime and frAdcSampPulseTime to
    pulseTime-(StartTime-50)
    These are the tree variable NPS.cal.fly.adcPulseTime and
    NPS.cal.fly.adcSampPulseTime
    
    
    To get the best time resolution need to use detector map
    which uses the the Hodoscope FADC 3of4 trigger as the
    reference time for the NPS calo detector.
    Hodoscope 3of4 trigger is in ROC1 SLot 18 channel 11.
    
    When using the hodoscope reference time need to
    have an overall offset of +337ns to get the NPS ADC pulse
    time back to around 150ns for the coincidence peak.
    Add the parameter nps_cal_arr_adc_tdc_offset_all = 337.
    which is added to every blocks individual time offset.

Updated to detector map to use hodoscope reference time
    
    Modified pcal_nps_coin.map
    
    Modifier PARAM/NPS/CAL/nps_cuts_eel108.param
    to use nps_cal_arr_adc_tdc_offset_all = 337.
    to have the adcPulseTime centered at 150ns
    for good coincidences.
    
    Set nps_cal_arr_adc_tdc_offset for each block
    using vaules determined by Peter Bosted

---

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