Proton-‐induced background studies for e+, e-‐ fluxesekptalk/CRAMS/050215/1_CRAMS… ·...

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Protoninduced background studies for e+, e fluxes Mo8va8on: for various samples: flux, efficiency (ex. trigger) we have to evaluate systema8cs (or subtract) events, caused by interac8on of protons with detector’s materials. Proton data used: B620_dev [0.5,10], [10, 200] GV, cube simula8on Proton flux (unmodulated) from Siarhei Electron + positron from PRL 113, 22102 (2014) Electron acceptance Cuts from Stefan

Transcript of Proton-‐induced background studies for e+, e-‐ fluxesekptalk/CRAMS/050215/1_CRAMS… ·...

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Proton-­‐induced  background  studies  for  e+,  e-­‐  fluxes  

•  Mo8va8on:  for  various  samples:  flux,  efficiency  (ex.  trigger)  we  have  to  evaluate  systema8cs  (or  subtract)  events,  caused  by  interac8on  of  protons  with  detector’s  materials.  

•  Proton  data  used:  B620_dev  [0.5,10],  [10,  200]  GV,  cube  simula8on  

•  Proton  flux  (unmodulated)  from  Siarhei    •  Electron  +  positron  from  PRL  113,  22102  (2014)  •  Electron  acceptance  •  Cuts  from  Stefan  

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Proton  and  lepton  fluxes  Differen'al  fluxes   Par'cle  rate  per  bin  for  protons  

Count  rate  and  acceptance  for  leptons  

Proton  acceptance  6  x  1.95  x  1.95  x  π [sr  m2]  

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Lepton  selec8on  (cuts  from  Stefan)  Total  number  of  protons  equivalent  to  219081  s  (2.5  days)  of  data  taking  

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Reconstructed  EnergyE  and  rigidity  vs.  Primary  momentum  

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Proton  contamina8on  es8ma8on  

TRD  only  cuts  but  in  “lepton”  stream,  expect  x  2  more  background  

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To  do  next  

•  Es8mate  background  for  Trigger  sample:  – Selec8on  cuts  applied  on  MC  lepton  sample,  evaluate  acceptance  for  this  selec8on  

•  Use  this  approach  to  adjust  TRD-­‐only  based  analysis  cuts  and  es8mate  residual  background:  – MC  lepton  simula8on  data  will  be  used  for  acceptance  evalua8on,  Trigger  efficiency,  etc.  

– MC  proton  simula8on  will  be  used  to  es8mate  residual  background  a_er  all  cuts  

 

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B620_B800  data  streams  

TrkAcceptCut(…,  id_inner,…,  “+ECAL_TOP  +ECAL_BOT”);  

EcalTrkShowerMatchCut(…,  id_inner,  3.6,  7.2,…)    

EcalEnergyCut(…,350,…EnergyD)  

…  previous  common  cuts;  

TrkAcceptCut(…,  id_inner,…,  “+ECAL_TOP  +ECAL_BOT”,  REVERSE);  

ECAL  Lepton  stream    (e+/e-­‐  and  interacted  protons)  

ECAL  MIP  stream    MIP  protons  

 

TRD  only  stream  (do  not  save  any  data  from  ECAL)    Out-­‐of  ECAL  geometry  e+/e-­‐  and  protons  

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B620_B800  processing  status:  •  New  containers  for  MC  data  were  introduced:  

–  MCGene  –  containg  general  informa8on  about  MC  run:  total  number  of  triggers,  nominal  and  real  momentum  ranges  

–  MCPartInfo  –  MCEventg  content  for  primary  par8cles,  sensi8ve  volumes  crossing,  secondaries  above  ECAL  

•  Number  of  slots  varies  from  20  to  200,  preproduc8on/produc8on  of  pass6  is  on-­‐going  

•  In  case  of  >  200  jobs  the  bolle-­‐neck  is  copying  speed  to  EKP  •  For  now  ~  50000/70289  files  were  produced,  36000  copied  to  EKP  •  Streams  will  occupy:  

–  ECAL  MIP                  1.80  TB  –  ECAL  Lepton        2.06  TB  –  TRD  only                3.84  TB  –  RTI                                          0.13  TB  TOTAL:                                    7.83  TB  

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TRD  online  status  •  Switch  no  new  machines  ams-­‐vobox01,  ams-­‐vobox02:  

–  3  8mes  (problem  with  creden8als?),  recovered  in  5-­‐6  hours  automa8cally  

–  25  Jan  morning  problem  with  SCDB  files,  processing  stopped,  processing  goes  to  infinite  loops  (reason  last  SCDB  file  was  corrupted).  Now  fixed  

–  DB  migra8on  to  ams-­‐vobox01  –  Old  version  of  so_ware  s8ll  runs  on:  phams01,  phams02,  amsvobox01,  amsvobox02  

•  TRD  tube  occupancy  online  scripts  were  started  •  TRDGain3  data  was  produced  (8ll  and  checked  8ll  Jan  23  for  

now).  Ready  for  next  produc8on  round.  See  next  slides..  –  Some  small  issue  appeared  (2  calibra8on  files  at  the  beginning  of  the  flight  were  missed).  Problem  fixed.  

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2014  Q3  

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2013  Q4  

 Refill  #45    Refill  #44    Refill  #43  

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2014  Q1  

 Refill  #46  

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TRDGain3    20  Sep  2014  –  5  Dec  2014  29  Sep:  layers  L2,L3,L4,L5,L6,L8,L9  switched  off    

01  Oct:  layer  L6  switched  on    

 Refill  #43    Refill  #42    Refill  #44  

28  Nov:  TRK  nominal