status of work and plans of the russian group in the alice collaboration as of october, 2009

JWG, 14 October, 2009, Vladislav Manko

Status of work and plans of the Russian group

in the ALICE Collaboration

as of October, 2009


Activities in 2009

Improvement, installationPHOS completed Test, commissioning & cosmic runsPHOS, TOF, T0, DIMUON, ITS ongoing Further development of soft-ware for data analysisPHOS, T0 ongoing Further development of the soft-ware for DCSPHOS, T0 ongoing Further development of the physics program ongoing First physics run Analysis of the first physics data

(From April JWG)


Photon spectrometer (PHOS)

• February – July, 2009 3 new air – tight casings produced and tested (design and production started in 2008)

• March – August, 2009 3 PHOS modules assembled in the new casings and tested in the lab

• July 2, 2009 one PHOS module installed

• August 13 – 14, 2009 two more PHOS modules installed

Current PHOS status Commissioning of the PHOS is ongoing Slow cooldown started in end September currently at about 0oC ( final operation temperature 25oC) humidity is stable and far below dew point

KI, Sarov, IHEP, JINR, Bergen, Oslo, Hiroshima, Wuhan, Warsaw, Prague

Conclusion of 2007 long test: Water condensation when cooled casing needed improvement


4

Airtight casing

Photon Spectrometer (PHOS)

12

3

PHOS installation (August 14)


PHOS in beam injection run

PHOS takes part on the global ALICE commissioning with cosmic and beam injection runs.25-27.09.2009: the proton beam injection•Several events with high multiplicity were observed (more than 100 cells/module) .•Deposited energy per crystal is low (few tens of MeV).

Examples of beam injection events:


PHOS in cosmic run

HLT event display shows a large shower with some its fraction in PHOS. Analysis is in progress.

Examples of cosmic events in PHOS:

Spectrum of cell energies in cosmic run


14/10/2009 27th RRB J. Schukraft

7

ALICE Status

PHOS modules in the ALICE detector

PHOS

The ALICE/PHOS Collaboration and the ALICE management are investigating possible ways to fund construction in 2011 the fourth PHOS module, so that it could be installed in the end 2011.


Trigger detector T0

• May, 2009 Re-cabling of the T0-A detector (in October, 2008, all cables were removed because of the miniframe

modification) , T0 detector commissioned.

• July, 2009 T0&TRD test. Verification of proper operation of the interface between the T0

detector and the pre-trigger system for TRD The new type of the amplifier approved and installed

• July 11 – 12, 2009 Participation in the injection test Sensitivity of the T0 detector to the injection particles was

demonstrated The T0 detector operated as a trigger The calibration with the laser was confirmed to be correct, though,

as expected, the amplitude resolution with the injection particles was slightly worse as compared to that with the laser.

MEPhI, INR, KI, Jyvaskyla


1-3 mip1-3 mip1-3 mip1-3 mip

1-3 mip1-3 mip1-3 mip1-3 mip

Laser DataLaser Data

Beam DataBeam Data

T0 - data


Dimuon spectrometer• Commissioning of the muon tracking chambers Many sources of electronics noise identified and fixed Fixing of poor connections and gas leak is underway

• Cosmic run Stable and efficient data taking More than 400000 events are

recorded in various configurations of the magnetic fields

PNPI

Commissioning of the muon tracking chambers An example of event triggered with MTR


PNPI@CERN, report for JWG

11

Cosmic runs: first momentum reconstruction


Detector TOF

• Cosmic run TOF – one of the main trigger detectors for cosmic run. Very stable trigger rate (back-to-back quasi vertical tracks) Preliminary time resolution 200 psec for “self-triggering” mode

ITEP


Physics

Physics of direct photons, neutral mesons, and jets with the PHOS spectrometer.

RRC “Kurchatov Institute”, IHEP, JINR, Sarov Feasibility of measurement of short-lived resonances. PNPI , ITEP, JINR Study of long range correlations for pp and AA collisions in the

framework of String Fusion Model. St.PSU Multiplicity measurement with T0INR Femtoscopy (HBT correlations)RRC “Kurchatov Institute”, IHEP, JINR

RRC “KI”, JINR, IHEP, ITEP, INR, StPGU, PNPI, MEPhI, Sarov

Development of soft-wares for data analysis, MC study of feasibility of measurements of various signals with the ALICE detector.


Computing

RRC “KI”, JINR, IHEP, ITEP, INR, StPGU, PNPI, MEPhI

Usage, further development of Russian Data Intensive GRID (RDIG), and requirements on the computing resources for ALICE to be presented in the general talk by Slava Ilyin.


Finance issues

Common Fund, C&IIn 2009 Russia paid all obligations !

Cash 85 kCHF

In-kind 1225 kCHF

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Total 1310 kCHF M&O cat. ATotal invoiced in 2002 – 2009 1968 kCHF

Paid in 2002 – 2009 1815 kCHF

In – kind 10 kCHF

--------------------------------

Outstanding 143 kCHF

(31% of 2009 due contribution)


Activities in the nearest half a year

Test, commissioning & cosmic runPHOS, TOF, T0, DIMUON, ITS Further development of soft-ware for data analysisPHOS, T0 Further development of the soft-ware for DCSPHOS, T0 Further development of the physics program Further development of RDIG First physics run Analysis of the first physics data Participation in the ALICE upgrade program

status of work and plans of the russian group in the alice collaboration as of october, 2009

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