Muon Range Detector   -- Fe event analysis --

Official plots accepted in K2K Collaboration meeting on May , 2003.

MRD event rate summary and SK expect

Fiducial = radius<3m, 1-3rd iron (73ton), Nlayer>=2.

## NOTICE ##   Up-dated spectrum error, based on 25% (75%) uncertainties at 0.5-1(0-0.5)GeV bin.

  • [summary table 2003 (ppt file)]
  • [summary table 2001 (ppt file)]
  • [summary table 1999-2000 (ppt file)]

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    MRD event rate stability

  • [rate stability from June'99 to April'03 normalized to CT (1-9th iron, Nlayer>=1, every 12hours)]
  • [rate stability from June'99 to April'03 normalized to CT (1-9th iron, Nlayer>=1, every 2days)]
  • [rate stability from Jun'99(Nov'99) to Apr'03 normalized to Mumon(silicon) (1-9th iron Nlayer>=1)].

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    Neutrino profile at MRD

    Fiducial = all of 1-9th iron, Nlayer>=1.
    Acceptance correction and target mass correction is already applyed.
    ## NOTICE ##   SK direction is (x=0cm, y=-15.8cm) in these plots.
     
  • merged DATA profile 2000(Nov'99-Jun'00) and 2001(Jan'01-Jul'01) and 2003(Jan'03-Apr'03) [profile (blue:2000 red:2001 green:2003)].
  • [Stability of profile center],  fitted gaussian center, plotted on every 5 days.
  • [Stability of profile width],  fitted gaussian width, plotted on every 5 days.

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    Muon energy spectrum and angular distribution stability

    Fiducial = radius<3m, 1-9th iron, Nlayer>=1.
     
  • Stability of [energy] and [angle], monthly variation.
  • Comparison between 2000(blue: Nov'99-Jun'00) and 2001(red: Jan'01-Jul'01) and (green: Jan'03-Apr'03) regarding [energy] and [angle].

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    Last up-date:  July. 8, 2003.
    Send comments to MRD group,  ishii@neutrino.kek.jp, choi@neutrino.kek.jp and maruyama@neutrino.kek.jp.

    Fin.