HES-HKS meeting

2009/2/24T.Gogami

EHODO timing resolution

Run54(last week)Run56 difference　 Change HV

With Slewing correction　 Run54164[ps](last week) ADC

Setup of Run56

Run54

Run56

EHODO timing resolution(Run56)

With Slewing correction

ADC vs TOF TOF

σ=161[ps]

1ch 2ch

3ch 4ch

Former EHODO timing resolution(Run65)

With Slewing correction

EHODO(used in previous experiment)

ADC vs TOF TOF

σ=171[ps]

1ch

4ch3ch

2ch

Cut coercively ADC 1chThen, TOF σ=150[ps]

Cut coercively

EHODO timing resolution(Run56)

1ch

3ch 4ch

2ch

If the slewing correction could be more better, TOF sigma~=150[ps].

UV curing glue

UV curing glueHas not arrived…

So I tried to bond PMT and scintillator(HTOF2Y) using the glue used Hampton group.

Mission failed ..(Exp. date 20Jan2009)

summary

EHODOTiming resolution TOF sigma~=160[ps](sigma~=150[ps] )

UV curing glueIt has not arrived.I can’t work on assembling of EHODO & HTOF1Y.

To do・ EDC・ Check assembled EHODO’s PMTs・ Taking data of EHODO, WC

End

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