1. Forum March 2003H.Taureg1 Magnetic Fields in ALICE Mapping and Monitoring

2. Forum March 2003H.Taureg2 Magnets in ALICE  2 Magnets L3 solenoid muon arm dipole  Planned magnet operations solenoid at two excitations, 0.2 and 0.5 T dipole always at the same excitation two polarities for both magnets, but change of polarity always together, say “ + + “ and “ - - “ 4 field configurations for data taking

3. Forum March 2003H.Taureg3 Field Measurement  Measurement requirements measure all regions from IP to and including detectors precision on field about 0.05% grid size about 10 cm spatial resolution about 1 mm full muon filter wall in place has to be dismounted again for absorber installation measure field in TPC region also with space frame in place

4. Forum March 2003H.Taureg4 Situation inside L3  Front Absorber Support in place  Rails installed Space Frame rails will be used as support  Back Frame in place with Al absorber installed with services installed, at least partially

5. Forum March 2003H.Taureg5 Situation in Dipole  muon wall in place  no support structures for muon chambers in place  small angle absorber not in place

6. Forum March 2003H.Taureg6 Field volume to be measured

7. Forum March 2003H.Taureg7 Field volume to be measured

8. Forum March 2003H.Taureg8 Schedule Schedule

9. Forum March 2003H.Taureg9 Help  TA3 will modify, prepare the measuring machines  TA3 will teach ALICE how to use the machines  transport services for installation and dismounting of measuring machines

10. Forum March 2003H.Taureg10 Tasks for ALICE  mounting and dismounting of measurement gear 2 technicians from Lars  field measurement at least 8 ALICE collaborators for 10 weeks volunteers are welcome  field simulation and data analysis another 2 to 3 persons ITEP has promised to help on simulation  field map into offline software A.Morsch will help

11. Forum March 2003H.Taureg11 Monitoring  Magnet control delivers to DCS current polarity temperature  NMR probes 4 in L3 solenoid 2 in dipole  Hall probes 8 in L3 solenoid 8 in dipole region

12. Forum March 2003H.Taureg12 NMR and Hall probes

13. Forum March 2003H.Taureg13 NMR and Hall probes

14. Forum March 2003H.Taureg14 Probe locations  L3 solenoid 4 Hall probes at outer radius of Space Frame in the center plane 4 Hall probes each at the outer radius of the space frame in the end planes  Dipole 2 NMR probe in the center plane of the dipole at the beam level near the yoke 2 NMR probes in the center plane above and below the beam at acceptance edge 6 NMR probes above and below the absorber