Transcript SHMS Magnets and Support Structure Current Status Paul Brindza Hall C Lead Engineer August 5, 2008

SHMS Magnets and Support Structure
Current Status
Paul Brindza
Hall C Lead Engineer
August 5, 2008
Introduction to SHMS Magnet Designs
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SHMS Spectrometer and Magnets
SHMS Magnet Reference Design Status
SHMS Support Structure
Preparations for SC magnet procurement
SHMS Design Team
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Paul Brindza
Steve lassiter
Eric Sun
Mike Fowler
Bert Metzger
Paulo Medeiros
Dan Young
Steve Furches
Macon Hodges
SHMS
Cryo
Transfer
Line
Target
Shield House
Power
Supplies
Bender
Q1
Q2
Q3
Dipole
Electronics Room
Detectors
SHMS Magnet Designs
Bo/Go
Aperture J
HB
3.10 T
35 x 36
28,900
Q1
10.6 T/m
40 cm
23,430
Q23 14.4 T/m
60 cm
5,800
Cosine (2Θ)
Dip
60 cm
5,000
Cosine (Θ)
4.76 T
A/cm^2
Design
“C” Type
Super Ferric
JLAB Q1
Cold Iron
SHMS Magnets Stored Energy & Weight
I (A)
L (H)
E (MJ)
Wt.
HB
4500
0.029
0.290
3.9 t
Q1
3630
0.123
0.808
15 t
Q23
5855
0.638
10.94
70 t
Dip
4940
1.63
19.84
163 t
SHMS Requirements from Optics
and SC Magnet Design Margin
Magnet
Optics
at11GeV/c
Design
Maximum
Design Margin
1.929
2.345
17.7%
14.752
19.905
25.9%
19.429
23.210
16.3%
12.917
23.210
44.3%
11.189
13.591
17.7%
HB dipole TM
Q1 Quad (T/M)M
Q2 Quad (T/M)M
Q3 Quad (T/M)M
Dipole
TM
SHMS Magnet Reference Design-Status
• HB magnet RD is under contract to NSCL/MSU
HB RD due Oct 08,RD Review Nov 08,Bid April 09
• Q1 RD is complete and Reviewed
RFP for bid released July 31, 2008!!
• Q2,Q3 & Dipole RD are ~90% complete and
Reviewed- Planned bid start December 2008.
Remaining Q2,Q3 & D design work at JLAB:
Q2,Q3 Helium Vessel design update to include SC splices
Dipole bore entrance flange revision may improve acceptance
Force collar segmentation to eliminate eddy current heating
3D Quench propagation FEA study
SHMS Q1 Quadrupole Assembly
JLAB Cold Iron Quad Design (CIQ)
SHMS Q3 Cosine 2Θ Quadrupole Assembly
60 cm warm bore cryo-stable design
SHMS Horizontal Bend Dipole
Warm Iron SC “C” Magnet
SHMS Cosine Θ Dipole Assembly
60 cm warm bore- cryo-stable design
Horizontal Bend
Warm Iron SC “C” Magnet
SHMS – Horizontal Bend Magnet R&D
R&D performed in collaboration with NSCL/MSU
Purpose: develop tooling and subsequently wind sub coils and full-size test coils
Issue:
HB magnet is closest to target to pre-bend small-angle particles.
But, space is tight there, which induces tight bends of superconductor.
Status: Design and development of tooling and techniques necessary to wind coils
complete. Trial wind ongoing at Michigan State University.
3D CAD Model of HB
Photos from HB
Trial Wind Progress
at Michigan State
University
Q1 Quad 3D CAD Model (shown)
Cold Iron Quad Design (CIQ)
HMS Q1- SHMS Prototype!
• SHMS Q1 is a mirror
twin of HMS with a
higher gradient.
• Q1 trial wind in ‘07
resulted in a shorter coil
with same length as
HMS Q1 coil: permitted
use of same cryostat.
Photos from Phase-II Q1 Trial Winding
Q2 Cosine 2Θ Quad 3D CAD Model Shown
60 cm warm bore
Q2 Cosine 2Θ Coil Drawing
Q3 Cosine 2Θ Quad 3D CAD Model Shown
60 cm warm bore
Q3 Helium Vessel Assembly Drawing
Cosine Θ Dipole 3D CAD Model Shown
60 cm warm bore
SHMS Dipole Cryostat & Yoke Assembly
SSC Outer Cable Short Sample Test Data at 4.2 K
including flattened cable
12000
6 Tesla Data
10000
Critical current
8000
7 Tesla Data
Series1
6000
Series2
Series3
8 Tesla Data
4000
2000
0
0
5
10
15
Test number
20
25
30
SHMS Dipole and Q23 temp margins
35000
30000
Current amps
25000
Q2 at 5.748 K
20000
Dip at 6.409 K
fit @ 4.4 K
SHMS dipole
15000
10000
5000
0
0
2
4
6
B tesla
8
10
12
SHMS Q1 and HB Temperature margin
25000
Current Amps
20000
15000
fit @ 4.4 K
SHMS Q1 Quad
SHMS H bend
Q1 at 8.092
HB at 7.756
10000
5000
0
0
1
2
3
4
5
Bmax in coil Tesla
6
7
8
9
SHMS
Support
Structure
SHMS Support Structure Reference Design
• SHMS Support Structure Preliminary Design
completed in 2007 by ALION inc.
• SHMS Support Structure Reference Design(RD)
underway, due September 30, 2008
• RD will be all the technical elements of the bid
package for the SHMS support structure
Performance Contract to be bid in 2009
• SHMS Support Structure RD review to be held in
Oct/Nov 08
SHMS Support Structure
Elevation left side
Longitudinal Sections SHMS Structure
SHMS Structure Sections
SHMS Support Structure Shielding
• Extensive shielding studies by Tanja Horn JLAB
Hall C provided a Physics based shield design
• Concrete thickness 2 Meters on walls facing
sources
• Concrete thickness ~1 meter on non critical
walls
• Separate shielded electronics vault
• Lead and Boron poly lining on critical walls
SHMS Support Structure
Shielding Requirements
Preparations for SC Magnet
procurement
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Determine Bid Sources- June 2006
SC Magnet Design Review #1 - Oct 2006
SC Magnet Design Review #2 - April 2008
Vendor Education: information exchange,
small contracts, site visits, publications
• Complete RD for all SC magnets- Now
• Preparing Bid Documents- Now
• Q1 solicitation issued
• HB, Q23, D: Advanced Procurement Plans completed
Vendor Education Efforts
• MT20 - 4 papers published in proceedings
• ASC 2008 - 3 abstracts accepted
• Contracts to industry & labs (16 + 1 TBD)
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3 Cold Mass Force Collar FEA
2 Q1 Trial Wind Phase 1 & Phase 2
2 HB Design/HB trial wind
1 Conductor reshaping /(2) Cable Testing
5 Technical/feasibility/cost consultant review
1 Burnout proof current leads fab & test
Conductor mech. properties at 4.5 K (2008)
Conclusions
• SHMS SC magnet designs are sound, have been
reviewed and are ready to start procurement.
(Q1 in July 2008, Q2Q3D in Jan. ‘09,HB in April ‘09)
• SHMS Support Structure and Shield House design
meets all requirements and is on track for start of
procurement in 2009.
• ALL SHMS systems on tract for start of Installation in
Hall C in May 2012.
Appendix
SHMS Dipole Design Cross Section
Flange for JLAB Standard Cryo Control reservoir
3 Dbl Pancake Cosine Θ coils
quads have 4 dbl pancake coils
Warm Iron Yoke
60 cm warm bore
Bath Cooled Cryostable Coil
Shrink Fit Coil Collar
Q1 Cold Iron quad section of 3D CAD Model
Flange for JLAB Cryo
Control Reservoir
Cold Laminated Yoke
With hyperbolic pole tip
40 cm warm bore
Bath cooled coil
clamped & preloaded
Q1 Pole & Coil are
conformal map
of window frame magnet
SHMS Magnet Reference Designs
• The JLAB Magnet Reference Design(RD) is
3D CAD Models & Drawings, Engineering
Analysis, FEA , Magneto-statics, Test Data,
Publications, Reports and R&D Results.
• This information is furnished during bidding
to assist the vendors with costing and to
provide a demonstration of feasibility of the
Technical Performance Requirements.
• The Reference Design represents JLAB’s design
solution but is not a requirement since we use
performance contracts
Q1 Vacuum Vessel Assembly Drawing
Procurement Plan for SHMS SC Magnets
• JLAB acquired 13 large unique SC magnets in 19901994 using a competitive process to award fixed
price performance contracts for Turnkey Magnets.
• Most operated the first time for acceptance testing
at JLAB!!
• JLAB has since added 9 more SC magnets to the
roster by similar processes
• We plan to continue using this process for the SHMS
Magnets and award 3-4 contracts for the five (5) new
SC SHMS magnets
Procurement Plan
• In a significant departure from the JLAB
tradition we will now provide major SC
magnet components (GFE/GFM)
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–
–
–
–
Superconductor
Cryo-Control Reservoir
DC Power System
Magnet Control System
Warm Yoke Steel
Procurement Plan SC magnet Contracts
• HB and Q1 Magnet Systems include
JLAB supplied reshaped Super Conductor, DC
system, I&C system and Cryo-control reservoir.
• Q2,Q3 & Dipole Magnet Systems include
JLAB supplied stabilized superconductor, DC
system , I&C system, cryo- control reservoir
and warm yoke steel.
Photos from Phase-II Q1 Trial Winding
SHMS – Horizontal Bend Magnet R&D
R&D performed in collaboration with NSCL/MSU
Purpose: develop tooling and subsequently wind sub coils and full-size test coils
Issue:
HB magnet is closest to target to pre-bend small-angle particles.
But, space is tight there, which induces tight bends of superconductor.
Status: Design and development of tooling and techniques necessary to wind coils
complete. Trial wind ongoing at Michigan State University.
3D CAD Model of HB
Property
Conductor
SSC Cable
Cond. Size
Cond. area
Strand dia.
Cu:Sc
RRR cable
RRR stab.
N/pole
N tot
L / turn
L total
Q23
composite
36 str outer
Dipole
composite
36 str outer
1.89 cm x 0.44cm
1.89 cm x 0.44 cm
0.832 cm ^2
0.64 mm
1.8:1
75
170
339
1356
6 M
8.1 KM
0.832 cm ^2
0.64 mm
1.8:1
75
170
487
974
8 M
7.8 KM
Property
I
NI
J average
Bo or Go
Int BdL
EFL
E
L
Bmax coil
Bmax yoke
Bave yoke
Q23
5855
7.9 E6
5855 A/cm^2
14.4 T/M
23.2(T/M)M
1.61 M
10.9 MJ
0.64 H
6.46T
2.49 T
1.60 T
Dipole
4940
4.8E6
4940 A/cm^2
4.76 T
13.6 TM
2.85 M
19.8 MJ
1.63 H
6.09 T
1.99 T
1.68 T
Property
Yoke L
Yoke OD
Yoke ID
Mag LOA
Warm bore
Cryo OD
Yoke wt.
Yoke steel
Cryo wt.
Weight
Q2
Q3
Dipole
1.6 M
3.20 M
2.4 / 2.0 M 3.2 x 2.3 M
1.46 M
1.58 M
2.33 M
4.10 M
0.6 M
0.6 M
1.45 M
1.56 M
46 /21 tons
123 tons
1006
1006
25 tons
40 tons
71/ 46 tons 163 tons
SHMS Magnets Superconductors
• All Magnets will use JLAB furnished and tested
Superconductor
• SSC outer 36 strand Rutherford cable
• HB and Q1 use the outer cable alone flattened
to remove the key stone shape
• Q23 and Dip will use use a composite
stabilized conductor
• Stabilized conductor is a 36 strand cable wave
soldered to a Copper extrusion
SHMS Q23 & Dipole Composite SC drawing
De- Keystoned SSC Outer Conductor
for SHMS HB and Q1
Keystone Angle
1.01°
(De-Keystoned )
Mid-thickness
1.156 mm
11.68 mm
1.1 mm
11.68 mm
Note: Cable is flattened ~ 90 % of cable width to avoid degradation
SSC Outer Cable Tests
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26 samples of SSC outer cable tested at BNL
Test Conditions ~ SHMS Magnets
Field Range B ( 6T, 7T, 8T)
Current
0 < I < 11,000
Tests at 4.2 K
Results compare favorably to nominal short sample
curve Ic=31532(1-B/15)^2.315 L. Dresner
• Typical Ic twice (or thrice) Io at constant B
• Rerolled cable ~1- 2 % less at 11,000 Amps
• BNL test stand is 1 % accuracy & 1% repeatability
CableID
SSC-4-A-00200
SSC-4-A-00201
SSC-4-A-00202
SSC-4-A-00203
SSC-4-A-00206
SSC-4-A-00214
SSC-4-A-00215
SSC-4-A-00216
SSC-4-A-00217
SSC-4-A-00218
SSC-4-A-00220
SSC-4-A-00224
SSC-4-O-00205
SSC-4-O-00206
SSC-4-O-00206
SSC-4-A-00207
SSC-4-A-00208
SSC-4-A-00219
SSC-4-A-00221
SSC-4-A-00222
SSC-4-A-00223
SSC-4-O-00208
SSC-4-A-00211
SSC-4-A-00212
SSC-4-F-00210
SSC-4-F-00211
Average
Ic6
A
10418
10204
10293
10405
10419
10436
10282
10542
10433
10463
10544
10480
10370
10279
10439
10388
10453
10697
10797
10671
10674
10181
10382
10353
10236
10075
Ic7
A
7715
7587
7688
7741
7721
7689
7526
7701
7713
7771
7766
7781
7617
7517
7691
7708
7774
7782
7889
7920
7910
7427
7547
7562
7276
7845
Ic8
A
5012
4970
5083
5077
5022
4942
4770
4861
4993
5079
4987
5081
4863
4756
4944
5029
5095
4867
4981
5168
5147
4674
4712
4772
4315
4614
10420
7687
4916
delta(6 T) delta(7 T) delta(8 T)
avedev
-2
-216
-127
-15
-1
16
-138
122
13
43
124
60
-50
-141
19
-32
33
277
377
251
254
-239
-38
-67
-184
-345
28
-100
1
54
34
2
-161
14
26
84
79
94
-70
-170
4
21
87
95
202
233
223
-260
-140
-125
-411
158
96
54
167
161
106
26
-146
-55
77
163
71
165
-53
-160
28
113
179
-49
65
252
231
-242
-204
-144
-601
-302
122
111
150
rerolled
rerolled
keystoned
rerolled
Cable Tests, Nominal SSC Outer Short Sample Curve & SHMS
Dipole Peak Field Load line
25,000
Critical Current A
20,000
fit @ 4.4 K
Ic Ave at 4.4K
SHMS dipole
15,000
10,000
5,000
0
0
2
4
6
Magnetic Field T
8
10
12
SHMS Operating Margins at maximum current
along the Peak COIL Field Load Line
HB
Temp Current Ratio
K
A
Ic/Io
3.31 3484 (1.77)
Field
T
2.91
Enthalpy
J/M(2006)
0.088
Q1
3.64
3791
(2.04)
3.48
0.213
Q23
1.31
771
(1.13)
0.74
0.480
Dip
1.95
1128
(1.23)
1.40
0.528
Cryostability in SHMS Magnets at 11GeV/c
Cond Io
Amps
Jo
Bm
Tc
kA/cm^2
Tesla
Kelvin
Alpha
HB
Cable 3600
22.9
2.95
8.17
1.19
Q1
Cable 3474
14.0
3.21
8.16
1.15
Q2
Comp 4885
4.89
5.41
6.96
0.65
Q3
Comp 3230
3.23
3.57
8.16
0.15
Dip
Comp 4068
4.07
5.02
7.40
0.36
Cryostability in SHMS Magnets at Max Current
Cond Io
Amps
Jo
Bm
Tc
kA/cm^2
Tesla
Kelvin
Alpha
HB
Cable 4500
28.9
3.69
7.75
2.28
Q1
Cable 3626
14.6
3.33
8.09
1.29
Q2
Comp 5855
5.85
6.46
5.76
2.01
Q3
Comp 3532
3.53
3.90
7.99
0.19
Dip
Comp 4940
4.94
6.09
6.41
0.92
Cold End Recovery for Q2
Equal Area Theorem for SHMS Q2 QUAD
1
0.9
0.8
0.7
0.6
Q
0.5
q
0.4
0.3
0.2
0.1
0
4
5
6
7
8
9
10
11
12
Q2 Limit on Cold End Recovery Stability
from equal area theorem
4.500
4.000
3.500
3.000
2.500
AQ
2.000
Aq
1.500
1.000
0.500
0.000
5000
5200
5400
5600
5800
6000
6200
6400
6600
6800
7000
Conclusions on SHMS Conductors
• SSC cable is a good match to the SHMS magnet
requirements
• SHMS Magnets have large margins at operating
conditions for 11 GeV/c
• Dipole and Q3 will be cryo-stable at max current
and Q2 will be stable due to cold end recovery
• SHMS Q1 with SSC cable will be more stable than
HMS Q1
MQE ~.060 J/M (M. N. Wilson et al)
• Trial winding studies for Q1 demonstrate that the SSC
cable is an excellent choice
( HB trial wind coils in 1-2 months)
Q1 Winding Tooling for Trial Wind
B stage tape application (left)
Detail of end turn former (right)
Q1 Coil – Trial Wind
• Q1 trial wind in ‘07
resulted in a shorter
coil with same length
as HMS Q1 coil:
permitted use of
same cryostat.
Uniformity of Q1 Straight Section Width
coil width 10.61 cm +/- 0.05 cm
Coil Pack Dimensions
Straight A
10.72
Straight B
10.70
Coil Pack Thickness (cm)
10.68
10.66
10.64
10.62
10.60
10.58
10.56
10.54
10.52
-100
-50
0
Z-Position (cm)
50
100
Verification of Q1 turn insulation
J-Lab Test Coil 2 - Shorted Turns Test
3.0
2.5
Voltage (V)
2.0
1.5
1.0
0.5
0.0
1
11
21
31
41
Turn
51
61
71
81
HB Coil Drawing and 3D CAD of Winding Tooling
Winding Trials underway at NSCL/MSU
HB Radiation Heating Studies
• HB coil cooling FEA based on 10 watts from
Radiation heating over a small area
• HB Rad heating measurements in Hall C and
simulations confirm that heating is ~ 1 watt
• 1 watt is 10 Rads/sec = 0.1 Gray/sec
• At 3000 Hours/year this is 100 year life!
• No RAD hard materials are required
Photos from HB
Trial Wind Progress
at Michigan State
University
SHMS SC Magnets
Backup design slides
Paul Brindza
July 22,2008
SHMS Magnet Design Status
• HB Magnet presented by Sailendra Chouhan
and Jon DeKamp
• Q1 Magnet presented by Steve Lassiter
• Quench Study by Shailendra Chouhan
• Vessel stress, cool down, heat load, pressure
safety by Eric Sun
• Cosine magnet mechanical design and
assembly by Mike Fowler
• Q2,Q3 and Dipole design next
SHMS Q23 and Dipole Design
• Cosine ( Θ )and Cosine (2 Θ) designs selected for
SHMS Dipole and Q23 Quads
• These magnet types produce excellent fields
efficiently and there is an enormous global design
basis.
• The fields produced are VERY linear and thus
excellent spectrometer magnets
• Super Ferric designs cannot compete in the required
field range
• Magnetic tolerances are ~2 mm and greater than
mechanical assembly tolerances
Q23 Coil Section
Mechanical layout vs. Tosca conductor.
Tosca Conductor
Mechanical layout
Dipole Coil Section
Mechanical layout vs. Tosca conductor.
Tosca Conductor
Mechanical layout
SHMS Q2 and Dipole Forces at 11 GeV
• Use TOSCA to integrate JxB over coil
• Fx = Int By.dA * Jz*EFL/10^4
• Fy= Int Bx.dA * Jz*EFL/10^4
Total Forces
Dipole Fx
Dipole Fy
Q2 Fx
Q2 Fy
Force
Nt
11.8 E 6
1.4 E 6
3.7 E 6
5.9 E 6
Force
Lb
2.6 E 6
6.3 E 6
8.3 E 5
1.3 E 6
1358
2666
1360
3308
Pressure PSI
• Steve Lassiter will present force collar FEA
SHMS Q2 Grad, Int GdZ, Coil Bmax,
Yoke Bmax, Yoke Bave
25
20
15
Grad(25,0,0)
IntGdZ
Max coil B
10
yoke Bm
Yoke Bave
5
0
0
1000
2000
3000
4000
Current Amps
5000
6000
7000
SHMS Q2 Quad EFL, G/I, IntGdZ, Inductance
demonstration of linearity
4.5000
4.0000
y = -3E-09x2 + 9E-06x + 4.0157
3.5000
EFL meters
3.0000
G/I *1000
Int G/I * 1000
2.5000
Inductance
y = -1E-09x2 + 3E-06x + 2.4847
Poly. (EFL meters)
2.0000
Poly. (G/I *1000)
Poly. (Int G/I * 1000)
1.5000
y = -4E-10x2 + 2E-06x + 1.6162
1.0000
0.5000
0.0000
0
1000
2000
3000
4000
Current Amps
5000
6000
7000
SHMS Dipole By, Int BydZ, Coil Bmax,
Yoke Bmax, Yoke Bave
16.000
14.000
12.000
10.000
By(000) T
IntBydZ TM
8.000
Max coil B
yoke Bm
6.000
Yoke Bave
4.000
2.000
0.000
0
1000
2000
3000
Current Amps
4000
5000
6000
SHMS Dipole EFL, Inductance, By/I, Int. By/I
demonstration of linearity
10.0000
y = -6E-10x2 - 1E-05x + 9.7237
9.0000
8.0000
7.0000
6.0000
EFL M
By/I *10^4
Int By/I*1000
5.0000
Inductance
Poly. (EFL M)
4.0000
y = -3E-10x2 + 9E-07x + 2.856
Poly. (By/I *10^4)
Poly. (Int By/I*1000)
3.0000
y = -5E-10x2 - 3E-06x + 2.7771
2.0000
1.0000
0.0000
0
1000
2000
3000
Current Amps
4000
5000
6000
Significant Changes in SHMS Magnets
since the Oct 2006 Review
• HB now a warm iron design with a LHE bath cooled
coil-design by NSCL/MSU
• Q1 coil has more turns(91/80) and is shorter
permitting use of original cryostat design length
(2.44m/2.72m)
• Q23 and Dipole shorter EFL’s (2.85/2.96 & 1.61/1.79)
due to space requirements, force collars are thicker
Aluminum so the cryostats are larger diameter and
yoke is further away and less effective, thus currents
are now higher
• All warm yokes somewhat larger and heavier
SC Magnet Engineering Contracts
expands the JLAB effort
•
•
•
•
•
•
•
•
•
•
FEA Force Collar-ACCEL,Novatech,FNAL
HB Design - NSCL/MSU
HB Trial Wind – NSCL/MSU
Q1 at Higher Gradient-SMI
Q1 with SSC cable-SMI
Q1 Trial Wind-SMI
SC Cable Testing- BNL
SC Cable Flattening- NEEW
Burnout Proof Current Leads- AMI
Feasibility and cost- Magtech,WSS
Examples of Safe choices for SHMS
•
•
•
•
•
All Magnets use SSC outer cable 2< Ic/Io < 3
Operating DC voltage <10 Volts
Fast Dump Voltage 200 Volts ~ .2 volts/turn
Typical Hot Spot Temperatures ~ 100 K or less
Magnet Vessels designed to ASME BPVC Section VIII
Division 2
• Magnets will be stable at 11 GeV/c
• JLAB standardized magnet systems are proven
SHMS Magnet Reference Designs Status
Status of Hall C SHMS SC Magnets
HB
Q1 Quad
Q2 Quads
Q3 Quad
Dipole
Requirements
done
done
done
done
done
Optical Design
done
done
done
done
done
Cable testing
done
done
done
done
done
Cable flattening
done
done
NA
NA
NA
Collar FEA
NA
NA
done
done
done
Mech prop.of comp conductor at 4.5K
NA
NA
underway
underway
underway
coil winding tests
underway
underway
NA
NA
NA
Reference Design
underway
NA
NA
NA
NA
Coil Magnetic design
done
done
done
done
done
Yoke optimization
underway
NA
underway
underway
underway
Coil Tolerances
done
done
done
done
done
Confirmation of Design Margin
done
done
done
done
done
Stability analysis
done
done
done
done
done
FEA
underway
NA/existing
done
done
done
Pressure Vessel Analysis
underway
NA/existing
done
done
done
Heat Load
underway
done
done
done
done
Cool down analysis & support rod stress
underway
done
done
done
done
Relief Sizing
underway
done
done
done
done
Quench Analysis
done
done
done
done
done
Force Collar Eddy current heating
NA
NA
done
done
done
Contracts
Engineering
CAD Design
3D Modeling
Coil
done
done
done
done
done
Cold mass
underway
done
done
done
done
Cryostat
underway
done
underway
underway
done
underway
done
done
done
done
underway
done
underway
underway
underway
done
done
done
done
done
General Assembly
Yoke
Cryo-reservoir
Drafting
Coil
done
done
done
done
done
Cold Mass
underway
done
done
done
done
Cryostat
underway
done
underway
underway
underway
underway
done
done
done
done
underway
done
underway
underway
underway
underway
underway
underway
underway
underway
General Assembly
Yoke
cryo-reservoir
Reference Design Status Score
73%
96%
89%
89%
90%
SHMS Space Assignment
HB
Q1
Q23
Dipole
(12) 19 in Racks
Sliding Door
Main Access
Door
Access to
Install or
Remove
Equipment
Integrated SHMS Magnet Safety (ISMS)
• JLAB is building ~ 1 of each magnet
– We can’t afford prototypes
– We can’t afford expensive tooling
– We can’t afford complicated assemblies
– We can’t afford expensive materials
– The magnets have to work the first time,
since we can’t afford to do it over!
• We must make safe engineering choices !
How we Integrate Safety into the
SHMS Magnet Reference Design
• SHMS Magnet designs were selected based on a rich
engineering data base (no inventions)
• Superconductor selection for large margins Ic/Io ~ 2
• Cryo stable designs & bath cooling
• Design clamped coils too! (belts & suspenders)
• Design for low Quench Hot Spot Temperature <100K
• Design for low operating voltages < 10 V & 200 V
• Burnout proof current leads
• Use of proven standardized JLAB systems
• Magnets vessels designed to ASME BPVC
Standardized JLAB systems applied to ALL new
SC Magnets
• JLAB Instrument and control system for super
conducting magnets field tested on 4 SC magnets in
Hall C- JLAB Born and Bred!
• JLAB Cryo-Reservoir design now in use on 7 magnets
in Hall’s A and C is a complete and compact cryogenic
management package
• JLAB standard DC system in use on 4 magnets in Hall
C (2 more on the way) integrates a DC source, auto
polarity switch, energy dump, NMR field control and
quench detection in one package.
SC Magnet Quality and Safety Enhancements
• Pressure Systems requirements are substantially
enhanced based on DOE order 10 CFR851 which
requires strict application of the ASME BPV Code
• Quality Assurance requirements enhanced and we
will require contractors to be certified under an
internationally recognized QA system
(ISO9001 or NQA1 for example)
• SC magnet assembly and acceptance testing at JLAB
will be enhanced due to integrating ISMS program
into SC magnet contract requirements
SC Magnet Safety Enhancement
JLAB ISMS Requirements for Acceptance testing
• All SC magnet acceptance tests will be performed at JLAB
( HB excepted)
• JLAB compliance with 10 CFR 851 Pressure Safety has strict
new guidelines for pressure testing
• All testing and magnet assembly work will be governed under
the rules of JLAB ISMS work control
1) Plan the work or testing
2) Analyze the hazards
3) Hazard control and mitigation
4) Perform work or testing within controls
5) Feedback and continuous improvement