Calorimetry Changes

1

Calorimetry Changes Step1 Vladimir
Litvine Caltech/CMS
2
Introduction

• Step1 consists of three major parts
• 1) Changes in CaloFrontEndResponce and
  CaloRecHitFormatter
• 2) Changes for trigger calculations in
  HcalTrigPrimFormatter
• 3) Changes for trigger calculations in
  EcalTrigPrimFormatter
• 4) add SimpleConfigurable to manage all changes

3
Step1 (I)

• Comment out next block in CaloFrontEndResponse
• const CaloBase actual_baseCaloRegisteryGetBase
  (basename)
• for(CellID actualactual_base-gtbegin()
• actual!actual_base-gtend()actual)
• ..
• next block in CaloRecHitFormatter should be
  modified to look like commented block from
  CaloFrontEndResponse
• for(frameframecachegtbegin()frame!framecache-gten
  d()frame)
• ..
• when CellID cannot be found in framecache, then
  one needs to throw an MC trial for ehit and if it
  over threshold, create CaloRecHit with amplitude

4
Step1 (II)

• Two loops in HcalTrigPrimFormatter
• for(vectorltCellIDgtiterator itvtowIDs.begin()it
  v!towIDs.end()itv)
• ..
• and
• for(frameframecachegtbegin()frame!framecache-gten
  d()frame)
• ..
• should be reduced to one loop over tower base
  with a subloop over FinerGranularity elements. If
  the DataFrame is not in framecache. It whould be
  created, noisified and injected into summap

5
Step1 (III)

• Same modifications for EcalTrigPrimFormatter
  except that the noise injection should not be
  done for each missing cell but once at the end
  for the total number of missing cells
• Strip algorithm should be performed after
  FinerGranularity loop - filling the strips
  during the FinerGranularity loop (avoid to
  navigate over base)
• Each CellID should be told in which strip it
  belongs during CellID setup (same as
  CoarserGranularity setup is done). This requires
  a new method in CellID

6
Step1 (Conclusion)

• Is it Ok and may be committed into ORCA
  repository? May be some tarball would be more
  suitable for tests (branches are prohibited in
  ORCA)?
• During CPT week to discuss and prioritize future
  changes
• Coordination is essential. We definitely need
  somebody who shall coordinate Calorimetry, ECAL
  and HCAL
• Ref Full description of Calorimetry changes is
  in
• http//www.cacr.caltech.edu/litvin/calochanges.ps