Dipole Magnet

Magnet Dimensions:

· Pole piece diameter = 26.5 cm

· Distance between poles = 10.2 cm (midplane @ 5.1 cm)

Power Supply:

· G156DH, Power Ten Inc. (S/N 010480)

Calibration

· Here is a recent calibration of the magnetic field. Probes 2 and 3 are used for the whole range.

Cooling system:

· Each pole of the magnet is connected to a pair of hoses that drive the water in and out.

· Kapton window to catcher foil distance
20 cm

The following is the first measurements to map the magnetic field in the old Hunter's Point Magnet. Data are probably obsolete and are included here for completeness.

Fringing field in the Hunter's Pt. magnet. Midplane to pole faces. Magnet set @110 Amp (0.4 T). Hall probe (STR8-0402 S/N 237045 (Bell Inc). Gaussmeter model 611HAB (Bell Inc.) Background was determined at 6.4 Gauss. Reference point was the TC gauge. Measurements were along the A1200 beam line. See diagram below.

Position (cm)	Field (Gauss)	Position (cm)	Field (Gauss)
95.0	4060	62.0	1173
92.0	4059	60.0	1021
89.0	4058	58.0	858
86.0	4058	56.0	729
83.0	4059	54.0	610
80.0	4053	52.0	529
78.0	4036	50.0	454
76.0	3969	48.0	388
74.0	3783	46.0	376
72.0 [edge of pole face]	3227	44.0	300
70.0	2950	42.0	261
68.0	2407	40.0	230
66.0	1872	38.0	200
64.0	1406	36.0 [edge of coil]	173
30.0	112	10.0	34
20.0	60	0.0	18