importTimeWalk.py

#!/usr/bin/env python
 
 
 
# --------------------------------------------------------------------------------
# Import payload TOPCalTimeWalk
# --------------------------------------------------------------------------------
 
import basf2 as b2
from ROOT import Belle2  # noqa: make Belle2 namespace available
from ROOT.Belle2 import TOPDatabaseImporter
 
# Create path
main = b2.create_path()
 
# Event info setter - execute single event
eventinfosetter = b2.register_module('EventInfoSetter')
eventinfosetter.param('evtNumList', [1])
main.add_module(eventinfosetter)
 
# Gearbox - access to xml files
gearbox = b2.register_module('Gearbox')
main.add_module(gearbox)
 
# Initialize TOP geometry parameters from gearbox
main.add_module('TOPGeometryParInitializer', useDB=False)
 
# process single event
b2.process(main)
 
# define a local database to save payloads(created automatically, if not existing)
b2.conditions.expert_settings(save_payloads="localDB/localDB.txt")
 
# and then run the importer
dbImporter = TOPDatabaseImporter()
 
# import constants
params = [-106.757,
          0.317404,
          4.11324e-06,
          -1.31485e-07,
          1.10216e-11]  # ps
a = 8806.6  # ps
b = 5.25439e-05  # ps
 
for i in range(len(params)):
    params[i] /= 1000  # ns
a /= 1000  # ns
b /= 1000  # ns
 
print('time_walk =', params)
print('a =', a, 'b = ', b)
 
dbImporter.importTimeWalk(params, a, b)
 
b2.B2RESULT("Done")