DBeamCurrent.h

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// $Id$
//
//    File: DBeamCurrent.h
// Created: Tue Feb 21 04:25:03 EST 2017
// Creator: davidl (on Linux gluon48.jlab.org 2.6.32-431.20.3.el6.x86_64 x86_64)
//

#ifndef _DBeamCurrent_
#define _DBeamCurrent_

#include <JANA/JObject.h>
#include <JANA/JFactory.h>

class DBeamCurrent:public jana::JObject{
   public:
      JOBJECT_PUBLIC(DBeamCurrent);
      
      // This gives the approximate electron beam current
      // for the current event. The values are obtained 
      // from the CCDB which was populated from values
      // in the EPICS archive. The values were obtained
      // from EPICS using the mySampler program so they
      // are interpolations between values to estimate the
      // current at 1 sec. intervals throughout the run.
      // These values were further reduced by looking
      // for boundaries where the current changes by more
      // than 3nA. Thus, the beam current cannot be considered
      // accurate to better than 3nA.
      //
      // The t_prev and t_next values give the time in
      // seconds of the previous and next beam trips.
      // The method IsFiducial() can be used to easily check 
      // if this event is in a region far from any beam
      // trips and that the beam current was greater then
      // some minumum (default is 5nA).
   
      double Ibeam;  // electron beam current in nA
      double t;      // time relative to start of run in seconds
      double t_prev; // time since last trip in sec
      double t_next; // time to next trip in sec
      bool   is_fiducial; // true if this event is in fiducial region of time
      
      
      // This method is used primarily for pretty printing
      // the second argument to AddString is printf style format
      void toStrings(vector<pair<string,string> > &items)const{
         AddString(items, "Ibeam", "%5.1f", Ibeam);
         AddString(items, "t",      "%f", t);
         AddString(items, "t_prev", "%f", t_prev);
         AddString(items, "t_next", "%f", t_next);
         AddString(items, "is_fiducial", "%d", is_fiducial ? 1:0);
      }
      
};

#endif // _DBeamCurrent_