1. 1 Possible setup for the H8 test beam F.Cerutti pIntroduction: from H8 Phase I to the system test pPossible setup in 2002-2003: Magnets on the H8 beam pConclusions

2. 2 Credits: Many thanks to pClaude Guyot pJean-Francois La Porte pLudovico Pontecorvo pIlias Efthymiopoulos pSandro Palestini pJim Bensinger pJoe Rothberg pChristoph Amelung pAlexander Schricker pWilliam Andreazza pGilbert Poulard

3. 3 Introduction: from H8 phase I to system test pH8 PhaseI is on the way - ingredients that will be tested: –DCS on alignment devices and temperature sensors –Sensor calibration and databases –Alignment reconstruction and simulation software –Test of the EC alignment without tracks pH8 PhaseII still to be defined - ingredients that will be tested: –DAQ –MDT electronics –DCS on HV/LV, gas system –Chamber calibration –Patter recognition and track reconstruction on straight tracks –Test of the EC alignment with straight tracks

4. 4 Introduction: from H8 phase I to system test pComplete system test in 2002-2003 ? –Final goal: Operate 1 Barrel and 1 EC sector with the “same” (as closest as possible) software/hardware as in ATLAS –Benefit: have a working muon spectrometer from the very beginning pAdditional Ingredients: –Final DAQ (selective readout of MDT chambers) –Trigger chambers (with electronics) –DCS reading of magnetic field probes –Pattern recognition and reconstruction of bent tracks –Complete muon spectrometer simulation (G4)

5. 5 Minimal Setup expected in 2001 pBarrel (see Ludovico’s talk) pEnd-cap (more details in Jim’s and Joe’s talks) –6 alignment bars with polar, azimuthal, radial, in-bar, and temperature sensors –DCS working on alignment devices –Alignment reconstruction (and simulation) software –Alignment (including sensor calibration) database –Phantom chambers with muon simulator pProgram of H8 Pase I: –Stability tests of the EC alignment devices –Relative tests of the EC alignment with controlled movement of one bar –Relative test of the EC alignment with the muon simulator –Absolute test of the EC alignment using redundancy pIntegration aspects between: DCS on alignment devices, alignment database, alignment calibration and reconstruction pInstallation of 3 equipped EC chambers in September ???

6. 6 Setup expected in 2002 pBarrel (see Ludovico’s talk) pEnd-cap (more information in the all the following talks) –6 chambers (EIL1, EIS1, EML2, EMS2, EOL3, EOS3) equipped with gas system, Faraday cage, electronics, in-plane and proximity alignment (precisely mounted) –DCS working on alignment, gas control, HV, LV –DAQ-1 –Simulation of the H8 test beam with GEANT4 pProgram of H8 Phase II: –Reconstruction of straight tracks –Absolute test of the EC alignment with straight tracks –Calibration of the EC alignment system with straight tracks pIntegration aspects between: DAQ, DCS on gas system, DCS on HV/LV, chamber calibration, MDT databases, track reconstruction, alignment reconstruction, test beam simulation

7. 7 Towards a more complete system test in 2002-2003 pSystem tests aspect to be studied after H8 Phase II EC: –Trigger system and its integration with DAQ and track reconstruction –MDT selective readout based on trigger chamber signals –DCS reading of Hall probes –Reconstruction of non straight tracks Proposal for 2002-03 H8 test beam setup: Add bending magnets in the H8 beam

8. 8 Magnets in H8 beam Barrel: 1 Dipole in front of the Barrel stand pGoals: –Irradiate both chambers in each plane to test the ch-ch praxial alignment concept (never tested on real data !) –Perform MDT auto-calibration pRequirements: –Angular spread similar to the one obtained for the ATLAS interactions (cannot be achieved with defocused beam) –About  60 mrad needed for auto-calibration (see ATLAS-MU 196 P.Creti et al.) –Same spread also good for alignment tests (C.Guyot) –Minimal rates ~10 4 particles per run needed for alignment tests (100  m/  10 4 ~ 1  m)

9. 9 Magnets in H8 beam End-cap: 1 dipole between the EI and the EM stations: pGoal: –Reconstruct bent tracks using measured magnetic field map –Measure the magnetic field in the dipole pRequirements: –Get bent tracks with sagittas ~ few mm-cm –Put Hall probes in the dipole (Hall probes from B0 test available in 2002 - C.Guyot) –Get rates ~10 4 tracks per run H8 beam: –With 2ry beam  particles with 10<p<400 GeV/c available –Reasonable  rates down to P~10-20 GeV: m (200-1000) particles/spill -> (1-5)x10 5 particles in ~3h m but for a limited amount of time (constraints on H6 beam) –3ry beam fluxes to be checked, easier availability –  P/P ~1% beam spread can be achieved

10. 10 For 20 GeV  MCB  ~64 mr ~4° (aperture 64 mrad) MBPL  ~60 mr ~3° (aperture 150 mrad) For 10 GeV  MCB  ~130 mr ~8° but > aperture 64 mrad MBPL  ~120 mr ~7° (aperture 150 mrad) For 20 GeV  MCB  ~64 mr ~4° (aperture 64 mrad) MBPL  ~60 mr ~3° (aperture 150 mrad) For 10 GeV  MCB  ~130 mr ~8° but > aperture 64 mrad MBPL  ~120 mr ~7° (aperture 150 mrad) Dipole magnets available at CERN

11. 11 Magnets in H8: Barrel dipole pPossible setup for the Barrel stand pFor P<50 GeV the beam doesn’t hit EOL3 in EC ! EOL2 and EOL4 should be installed if we want to take useful data in EC stand pFor P<30 GeV the beam is deflected outside the beam-dump (at this rates this should not a problem)

12. 12

13. 13 EO station beam deflections: 64 mrad Barrle 64 mrad EC

14. 14 Magnets in H8: EC stand pFor the EC with the MCB magnet reasonable sagittas are obtained for P ~ 20-150 GeV muons:  Since P of the beam can be fixed at the 1% (or probably better) if we change B -> [    BL)]: good relative check of the muon spectrometer P measurement For 20 GeV  MCB  ~64 mrad s~780mm For 150 GeV  MCB  ~9 mrad s~120mm For 20 GeV  MCB  ~64 mrad s~780mm For 150 GeV  MCB  ~9 mrad s~120mm

15. 15

16. 16

17. 17 Conclusions p2002-2003 could be a very interesting period for H8 test beam activities pThe goal of the H8 test beam in 2002-2003 goes well beyond simple test of the alignment systems pThe introduction of bending magnets can help the Barrel alignment test (and auto-calibration) and the test of the reconstruction of non straight tracks in the EC pTo have a complete system test a large effort from the muon collaboration is needed: muon chambers, trigger chambers, electronics, DAQ, DCS, gas system, HV/LV, simulation, track reconstruction, alignment reconstruction, databases pIn the following talks interest / availability / manpower / resources about all this items will be discussed