August, 17 HCAL General S. Banerjee, O. Kodolova 1

HCAL DPG report

Sunanda Banerjee – SINPOlga Kodolova – SINP MSU

August 17, 2012

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Outline

• Monitoring and calibration HF Raddam monitoring HF Raddam with data HBHE raddam monitoring• Phi-symmetry• Offline shifts• Noise WG

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HF Radiation damages measurements with raddam system

A.Volkov,D.Elumakhov

Take 8 periods

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HF Radiation damages measurements with data

Data selected with HLT_Mu17_mu8as relative change of E deposited in HF rings and corrected by NPV and the energyCut (4 intervals in energy).2 methods: - Ratio of average energies, aveE2/aveE1, with aveE=E_tot_deposited(ieta,Nvtx)/Nevts(Nvtx) - Ratio of mean energies

Robert ChieleskiIgor Vodopianov See update tomorrow, August 17, HCAL DPG

Nvtx=[5-20] Nvtx=[10-20]

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HBHE first raddam measurements

Depth1

L.TurchanovichN.KulaginV.SkvortsovV.TalovV.EpshteynD.Vishnevskyi

Need to recheckwith othermeasurements?

Need to have HPD correctionto verify what data see

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HE raddam with data

Runs chosen with high instantaneous luminosity (~6e33):Period Runs datesp1 191718-191859 Apr 18-20p2 194314-194480 May 17-19p3 195913-195950 Jun 9-10p4 196431-196531 Jun 15-18p5 199318-199429 Jul 20-22

E>4 hits, p5 / p1 (Jul / Apr) vs ieta

Igor Vodopianov

Shuichi/EmineHT dataset

Muon stream

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Phi-symmetry corrections in 2012

The phi-symmetry pass was done: for HF we use the weighted combination from NZS and iterative; for HBHE – only iterative method is used.

HFHB HE

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Offline shifts

Pavel Bunin, Ted Kolberg

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Noise WG

MinBias 2012 CaloMet

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Back-up

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HBHE drift from 2011 to 2012

Gain updates is done regularly by Hcal Ops and is uploaded into condition DB by Database group: we need to have the gain tag to start the first2012 calibration pass – this week or beginning of the next?

V.EpshteynD.Vishnevskyi

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Calibration procedure from 2011 to 2012

HPD and PMT gain drift

HPD gain drift correction once per month (as in 2011)

PMT gain drift correction once per week (roughly each ~1/fb) due to much higher degradation rate of gains in PMT (change w.r.t. 2011)

HF Fibers degradation

Radiation damage correction in HF based on the radiation damage measurements once per month (depends on the measurement) (change w.r.t. 2011)

We consider HF is correctly calibrated with Z->ee corrections for the 2012 startup

The above corrections as HcalGain condition IOV will be uploaded by creation to _express, _prompt and _offline tags and (by agreement) to _hlt tag

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Calibration procedure (continuation)

phi-symmetry corrections with iterative and NZS method (as in 2011) during technical stops while the needed statistics is available

Isolated track calibration (as in 2011) during technical technical stops

while the needed statistics is available

Absolute scale in HF with Z->ee corrections (Long fibers). Short fibers will be calibrated using Long fibers calibration and MC correction for ratio between Long and short taking into account RadDam estimation for Short fibers

The above corrections as HcalRespCorrs condition IOV will be uploaded by approval to_express, _prompt, _offline and _hlt tags