Field & Power vs. I.R. of Cu Magnet with 30-cm Build or 50-cm O.R.
Robert J. Weggel; Magnet Optimization Research Engineering (M.O.R.E.), LLC; 1/13/2014
Field & Power vs. Bore of Copper Magnet in 15-T Background Field
60
50
40
O. R. = I. R. + 30 cm
Magnet current [kA]
Magnet power [MW]
Field contribution [T]
H.C. #1 = 1.6 cm sq.
See Legend
30
20
14
10
7
5
4
8
10
12
15
20
25
Inner radius [cm]
Fig. 1. Outer radius, power, current & field contribution (in 15-T background field) vs. inner
radius of magnet with 10 layers (30-cm radial depth) of JHF-like mineral-insulated conductor. In
every layer the peak hot-spot temperature is 90 ºC at 10 ºC inlet temperature, 40-atm water
pressure, and three hydraulic passages per layer.
Field & Power vs. Bore of Copper Magnet in 15-T Background Field
17
Teslas (lower curves); MW (upper curves)
15
12
10
8
12 layers, 8-50 cm
13 layers, 8-50 cm
14 layers, 8-50 cm
15 layers, 8-50 cm
16 layers, 8-50 cm
6
5
4
3.5
8
10
12
14
16
18
20
22
24
Inner radius [cm]
Fig. 2. Power & field contribution (in 15-T background field) vs. inner radius of 50-cm-O.R.
magnet of JHF-like mineral-insulated conductor. In every layer the peak hot-spot temperature is
90 ºC with an inlet temperature of 10 ºC inlet temperature, a water-pressure drop of 40
atmospheres, and three hydraulic passages per layer.
Field & Power vs. Bore of Cu Magnet with 12 Layers from 8 cm to 50 cm
18
Teslas (lower curves); MW (upper curves)
15
12
10
8
6
5
2
0.60 T /MW
2
0.50 T /mw
2
0.45 T /MW
2
0.40 T /MW
2
0.35 T /MW
2
0.30 T /MW
4
3.3
8
10
12
14
16
18
20
22
24
Inner radius [cm]
Fig. 3. Power & field contribution (in 15-T background field) vs. inner radius of the mostefficient 50-cm-O.R. magnet of JHF-like mineral-insulated conductor. In each layer the peak
hot-spot temperature is 90 ºC or less with an inlet temperature of 10 ºC, a water-pressure drop of
40 atmospheres, and three hydraulic passages per layer. Emphasizing efficiency instead of
maximum possible field saves considerable power with only modest sacrifice in field.
Field & Conductor Size vs. I.R. of 10-MW Magnet with O.R.– I.R. = 30 cm
Teslas (upper two curves); cm (lower four curves)
6.5
5
Field of 10-layer magnet
Field of 12-layer magnet
Side of last of 10 layers
Side of last of 12 layers
Side of first of 10 layers
Side of first of 12 layers
4
3
2.5
2
1.5
8
10
15
20
25
Inner radius [cm]
Fig. 4. Power & field contribution (in 15-T background field) vs. inner radius of the mostefficient 10-MW magnet with 30-cm radial depth of windings of JHF-like mineral-insulated
conductor. In each layer the peak hot-spot temperature is 90 ºC or less with an inlet temperature
of 10 ºC, a water-pressure drop of 40 atmospheres, and three hydraulic passages per layer.