K2KOFFICIAL: Febrary-June, 1999

Issues

• 1kt-online
  • Nu Candidate at 1kt (There is no OD hit. The mu penetrates also FGD.) PSfile (Itow)
    
  • Nu Candidate at 1kt No.2 (Two ring event where vertex is inside fiducial) (Itow)
    
  • An typical cosmic muon at 1kt. (There is no OD hit. The mu penetrates also FGD.) (Itow)
    
  • Multi cosmic muon event at 1kt.
    (Itow)
    
  • Stopping cosmic ray muon from the online 1 kton event display. Entry point is very
    apparent, as is the direction of the muon's flight. Colors correspond to the charge
    deposited in various PMT's. ( gzip'ed .ps ) (Vagins)
    
  • Beam-induced entering muon #1 from online event display. ( gzip'ed .ps ) (Vagins)
    
  • Beam-induced entering muon #2 from online event display. ( gzip'ed .ps ) (Vagins)
    
  • Neutrino candidate #1 from online event display. Clear, colorful ring. Event was self-
    triggered during a beam spill. View is downstream, towards Super-K. ( gzip'ed .ps ) (Vagins)
    
  • Neutrino candidate #2 from online event display. Pretty multi-ring event.
    View is downstream, towards Super-K. ( gzip'ed .ps ) (Vagins)
    
  • Neutrino candidate #3 from online event display. Possible entry point in ID,
    but no corresponding hits in OD. Dead-space event? ( gzip'ed .ps ) (Vagins)
    
  • Neutrino candidate #4 from online event display. No OD hits near possible
    entry point rules out entering muon. ( gzip'ed .ps ) (Vagins)
    
  • Neutrino candidate #5 from online event display. Pi0 e-like double ring event ??? (Ishino)
    
    
• FGD-online
  • Nu Candidate at FGD No muon chamber TDC cut. Radius of circles in muon chamber is proportional to TDC count. (corresponds to 1kton hit in the above figure.) (Kobayasi)
    
  • Nu Candidate at FGD Muon chamber TDC cut of 25count< T < 45count(1microsec window), which corresponds to max drift time, is applied. (Kobayasi)
    
  
  
• Offline_SciFi (Sakuda)
  • First observed track in FGD
    /top /side /sidetop /tophall /sidehall /iit3 /iit3z / gzipped ps/
    Upstream-1kt CC neutrino event. (Sharkey/Ishida)
    
  • First observed vertex in FGD
    /top / side /iit-all / iit-8/ / iit-8z/
    CC(QE?) neutrino event in FGD (Nu energy 1.7GeV from Tumakov tracker). (Ishida)