Detector Concepts Target/Luminosity Additions: Recoil detector

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Presentation transcript:

Detector Concepts Target/Luminosity Additions: Recoil detector Fritz-Herbert Heinsius (Universität Freiburg) Target/Luminosity COMPASS detector New proposals STORS (I.Savin) Additions: Recoil detector protons neutral particels Electromagnetic calorimeter Particle Id? Acceptance? Trigger?

Target and Luminosity Unpolarized: 2.5m LH2: L=1.3 1032 cm-2s-1 2.5m LD2: L=3.0 1032 cm-2s-1 8 cm Cu: L=5.0 1032 cm-2s-1 Polarized (f=0.4, Pb=0.8, Pt=0.5, D(y)): 1.2m 6LiD: L=5 1032 cm-2s-1 (r=0.54 g/cm3) Assuming 2 108 µ per burst (16.8s cycle) Absolute luminosity determination: 1% ? Beam sport RMS: horiontal 4.5mm, vertical 7.5 mm (DVCS)

COMPASS Spectrometer 2003/04 1 Tm 4.4 Tm

Resolution and acceptance µ´: Q2 = 10-4 – 100 GeV2/c2 x = 10-5 – ~0.4 (1) eff(P) = 0.9(5 GeV), 0.75(1.5), 0.5(0.8) E>20 MeV ECAL dE/E= 0.055 / sqrt(E) + 0.015 position = 6.0 / sqrt(E) + 0.5 mm E>20 MeV ≤180 mrad µ: Dp/p = 0.5 % Hadron: p=1-200 GeV/c Dp/p ~ 0.5 % at 15GeV/c K/p: 9 – 40 GeV/c

160 GeV/c

Particle Identification q(mrad) p(GeV/c) p K p, m With RICH and hadron calorimeters hadrons m Essential for reconstruction of D-Mesons

New Technologies for Tracking and Particle ID GEM Large area drift detectors MicroMegas Scintillating fiber trackers TDC RICH CsI & MWPC readout Radiator: C4F10 Readout electronics

COMPASS Acceptance

High pT cuts