H.Taureg TB December 2004 1

B-Field Mapping

H.Taureg TB December 2004 2

Schedule

• Install equipment: May 2005

• Start mapping: mid June 2005

• Finish mapping: August 2005, latest

H.Taureg TB December 2004 3

Mapping programme

• L3 and dipole at two polarities– Only ++ and -- combination

• L3 at 0.2 and 0.5 Tesla– Dipole powered always at same level

• L3 alone – At 0.2 and 0.5 Tesla and both polarities

• In L3 – Space Frame volume– EMC, HMPID, PHOS volume

H.Taureg TB December 2004 4

Grid size

• Dipole– 80 mm in x, y, z

• L3– 100 mm in r and z– 2° in φ for r > 2 m– 4° in φ for r < 2 m

H.Taureg TB December 2004 5

Grid size

• Fine grid as above

• Coarse grid – Increase step size by factor 3

• In φ and z for L3• In z for dipole

H.Taureg TB December 2004 6

Mapping scheme

H.Taureg TB December 2004 7

Mapping work

• Continuous, 24 h / 24 h

• Team of at least 3

• Set up changes during normal working hours

• Time estimate to be worked out

H.Taureg TB December 2004 8

Hardware

• Support structure to be adapted for dipole

• Support structure to be adapted for L3

• Measuring arms to be constructed for L3