sis 300 magnet design options. cos n magnets; cooling with supercritical helium gsi 001 existing...
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SIS 300
Magnet Design Options
Cos n magnets; cooling with supercritical Helium
•GSI 001
existing magnet built at BNG
measured in our test facility
•6 T straight dipole
prototype is going to be built at IHEP
•4.5 T curved dipoles
actual design (change to FODO lattice)
prototype is going to be built at INFN
•Quadrupoles
no design yet
SIS 200 / SIS 300 main magnets
GSI 001: Dipole Parameters GSI 001: Dipole Parameters
RHIC dipole Superconducting wire:
– NbTi-Cu (1:2.25)
– filament diameter 6 m
– twist pitch 13 mm
– no coating
Rutherford cable
– no core
Coil
– phenolic spacer
– Cu wedges
Yoke
– Hc= 145 A/m
– 6.35 mm laminations
RHIC type dipole GSI 001Superconducting wire:
– NbTi-Cu (1:2.25)
– filament diameter 6 m
– twist pitch 4 mm
– Stabrite coating
Rutherford cable
– 2 x 25µm stain-
less steel core
– open insulation
Coil
– stainless steel collar (G11 keys)
– G11 wedges
Yoke
– Hc= 33 A/m, 3.5% Silicon
– 0.5 mm laminations, glued
GSI 001
Calorimetric Loss Measurements
-
quench34,0W ±3W
(9%)
40W by heater*
90,7 J/Cycle
17,0W ± 3W
(17%)
68 J/Cycle
7,1W ±3W
(42%)
56,8 J/cycle
4T
53,2W ±3W
(6%)
56W by heater*
79,8 J/Cycle
30,1W ±3W
(10%)
28W by heater*
60,2 J/Cycle
15,9W ± 3W
(19%)
47,7 J/Cycle
7,6W ±3W
(39%)
45,6 J/cycle
3T
52,1W ±3W
(6%)
57W by heater*
52,1 J/Cycle
30,8W ±3W
(10%)
38W by heater*
41 J/Cycle
16,3W ± 3W
(18%)
32,6 J/Cycle
7,6W ±3W
(40%)
30,4 J/cycle
2T
44,3W ±3W
(7%)
41W by heater*
22,2 J/Cycle
28,6W ±3W
(10%)
27W by heater*
19 J/Cycle
15,3W ± 3W
(19%)
15,3 J/Cycle
6,9W ±3W
(43%)
13,8 J/cycle
1T
4T/s3T/s2T/s1T/s
*by heater; means an inexact additional measurement using the heater power measurement
in the distribution box ( ± 10W)
(C.Schröder)
SIS 300 6 T Dipole SIS 300 6 T Dipole
•Central field: 6 T
•Ramp rate: 1 T/s
•Length: 1 m
•Inner coil diameter: 100 mm
•Two layers: inner: 4 blocks/outer: 3 blocks
•Cooling: supercritical helium
•Interlayer cooling channel
•No holes in Kapton
•Optimized end parts
•Appropriate Ra of about 300 µ
•Available in May 2008
Conductor for SIS 300
Same outer dimensions and number
of strands as the cable
for the outer layer of the LHC dipole
SIS 300 dipole: thermal analysis, margins
Wire and Cable R&D
Comparison QE vs. I/Ic for center heaters.
10
100
1000
10000
0,4 0,5 0,6 0,7 0,8 0,9 1,0 1,1
I/Ic (-)
QE (u
J)
Ra 60-70 μΩ
Ra 600-700 μΩ
Ra 8000-9000 μΩ
Iop/Ic
Comparison QE vs. I/Ic for center heaters.
10
100
1000
10000
0,4 0,5 0,6 0,7 0,8 0,9 1,0 1,1
I/Ic (-)
QE (u
J)
Ra 60-70 μΩ
Ra 600-700 μΩ
Ra 8000-9000 μΩ
Iop/IcIop/Ic
•Quench energy measurements for
different Ra in liquid helium (CERN)
•Development of wires with CuMn
interfilamentary matrix
(INTAS/INFN)
•Optimization of heat treatment to
adjust Ra (BNL)
•Time dependent magnetization
measurements (Twente)
Doublet Lattice based on Doublet Lattice based on short straight dipolesshort straight dipoles
FBTR SIS 300 Lattice
SIS300 Lattice Redefinition
New SIS 300 Lattice
Small ring circumference and matching to SIS100 geometry requires FODO lattice in SIS300 and
curved dipole magnets. Advantages a) chromaticity correction without significant DA reduction
b) slow extraction with reasonable s.c. septum strength
FODO Lattice based on long (and short)
curved dipoles
(P.Spiller, Fair Monthly, June 2007)
4.5 T curved dipole
4.5 T curved dipole
4.5 T curved dipole; Thermal analysis
4.5 T curved dipole; Thermal analysis
4.5 T curved dipole; Thermal analysis
4.5 T curved dipole; Thermal analysis
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