overview of the experiment collaboration (about 30 physicists at this meeting) budget realistic...

Overview of the experiment

•Collaboration (about 30 physicists at this meeting)•Budget•Realistic schedule and general status (few words) of each sub-detector (see individual presentations)

A. Baldini 11 Jul 03

INFN & Pisa University A. Baldini, C. Bemporad, F.Cei, M.Grassi, F. Morsani, D. Nicolo’, R. Pazzi, F. Raffaelli, F. Sergiampietri, G. Signorelli

ICEPP, University of Tokyo Y. Hisamatsu, T. Iwamoto, T. Mashimo, S. Mihara, T. Mori, H. Nishiguchi, W. Ootani, K. Ozone, T. Saeki, R. Sawada, S. Yamada, S. YamashitaKEK, Tsukuba T. Haruyama, A. Maki, Y. Makida, A. Yamamoto, K. YoshimuraOsaka University Y. Kuno

Waseda University T. Doke, J. Kikuchi, S. Suzuki, K. Terasawa, A. Yamaguchi, T. Yoshimura

Budker Institute, Novosibirsk L.M. Barkov, A.A. Grebenuk, D.G. Grigoriev, B, Khazin, N.M. Ryskulov

PSI, Villigen J. Egger, P. Kettle, M. Hildebrandt, S. Ritt

The collaboration

INFN & Pavia University A.de Bari, P. Cattaneo, G. Cecchet, G. Nardo’, M. Rossella

INFN & Genova University S. Dussoni, F. Gatti, D. Pergolesi, R. Valle

INFN Roma I D. Zanello

INFN & Lecce University S. Spagnolo, C. Chiri, P. Creti, M. Panareo, G. Palama’

Budget (K€)Calorimeter PMT 1756Lxe 845Vessel 400Various items 271Xe system 369Cobra Magnet 1175

Timing counter 700Trigger 400

Drift Chambers 149Muon transport 184DAQ Electronics 405Detector 172HV 39

6865

Japan 2529Italy 2200PSI 1299

6028

Running costs - 2008 1303

Approved in aprilApproved in may

2003-2005

Magnet: Construction finished!• Construction was finished!Construction was finished!• Excitation test has started on June 21th.Excitation test has started on June 21th.

Compensation coilsCompensation coilsSuperconducting coil in cryostatSuperconducting coil in cryostat

PotentiometerPotentiometer

Support frameSupport frame

Jan 2002:2002 2003 2004 2005

Jan 2003: Test MilestoneAssemblyDesign Manufactoring

Design Ass. TestWinding & Cryo.

Deliv.PSI Test

Field Measurement

Platform

COBRA Magnet schedule

Platform design status (June 24th)

beam

Measurements:Measurements: Phase B – post Triplet 2 & CollimatorPhase B – post Triplet 2 & Collimator Phase C – post SolenoidPhase C – post SolenoidSeveral unexpected problems encountered & Solved !!!Several unexpected problems encountered & Solved !!!

“Z-Branch” Measurements April/May2003

Jan 20022002 2003 2004 2005

Jan 2003: Test MilestoneAssemblyDesign Manufactoring

Studies

Solenoid

Quadrupoles

Target

Beam

Photon detector

•Large prototype successfully operated with purified Xenon at TERAS: E2%•LP already shipped to PSI: will be better tested by making use of monocromatic photons•Need of a liquid hydrogen target•Cryostat project is being examined by F. Raffaelli (Pisa) who will follow its construction•PMT test facility under construction at Pisa•Deficit in the budget for 350 PMTs

Photon Detector schedule2002 2003 2004 2005

Test MilestoneAssemblyDesign Manufactoring

Large Prototype Beam Test Beam Test

Vessel Design Assembly & Test

PMT Delivery + Testing

Refrigerator Manufactoring Assembly

Liq. Purification

Assembly Test

Manufactoring

Engineering runs

Drift chambers

•Prototypes of cathodes supporting structure•Print foils meeting the experimental requirements found•Tests at M1: drift time measurements and cathodes read-out•First studies on pattern recognition

2002 2003 2004 2005


Full Prototype

Medium PrototypeCharge division & Cosmics

FP FP

Full Detector (18 DC)

Jan 2002: Positron Tracker

2002 2003 2004 2005


Design

PMT Evaluation PMT

Jan 2002: Timing Counter

•Tests of fine mesh PMTs (even in magnetic fields) and of counter prototypes (M1) going on •Good solution for transverse detector: scintillating fibers + APDs

Electronics•Need of at least two prototypes (both for the trigger and the DRS)•First trigger prototype to be tested in september•Second DRS design is soon going to be designed

Full System

2002 2003 2004 2005


Prototype Board

2nd Prototype

Jan 2002 Trigger

2002 2003 2004 2005


2nd Prototype

Tests1st Prototype

Boards & Chip Test

Jan 2002 DRS (DAQ)

2002 2003 2004 2005


Platform

DetectorIntegration

EngineeringRuns

Jan 2002: Complete Detector

•Start of the experiment in 2006•All possible engineering runs in 2005

Sensitivity

)sresolutionworst 102.0for 106.1 and 106.5(

101 oflimit upper C.L. 90% a toingcorrespond 108.381314

1314

R

SES

The rate is lowered in order to have ~ 0.5 background events for 1 signal event

We confirm our (July 02) estimates of detectors resolutions and therefore our goal of improving the present limit by two orders of magnitudes

overview of the experiment collaboration (about 30 physicists at this meeting) budget realistic...

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