Design and Status of the ISACII Cryogenic System

1
Design and Status of the ISAC-II Cryogenic System

• R.E. Laxdal, TRIUMF

• Outline
• Introduction to ISAC-II
• Accelerator Tour
• Cryogenic Specification
• Cryogenic System
• System components
• Operating modes
• Status

2
TRIUMF
Vancouver
ISAC-II
ISAC-I
Cyclotron
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Experiments ISAC II
ISAC II - 2007
ISAC II - 2005
ISAC II - 2009
ISAC II - 2001
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Stage 0 - 2005
E4.5MeV/u A/q6
S0
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Stage 1 - 2007
E6.5MeV/u A/q7
S0
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Stage 2 - 2009
E6.5MeV/u A/q7
S0
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ISAC-II SC Linac
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Medium Beta Cavity
Chemical Polishing at CERN

• Prototype developed in collaboration with A.
  Facco of LNL and fabricated in E. Zanon
• Simple construction suitable for industry
  production
• Twenty cavities ordered from E. Zanon in Italy
• Four received at TRIUMF after chemical polishing
  at CERN
• Remaining cavities to be polished at JLAB

Frequency Measure at Zanon
Four Cavities at TRIUMF
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Superconducting Solenoids
Prototype Solenoid at Accel

• Focussing in the SC Linac is provided by
  superconducting solenoids (B?9T)
• End fringe fields controlled with active
  bucking coils (Bcavity?0.1T)
• Medium beta prototype received incomplete from
  Everson Electric due to bankruptcy
• Production Medium and high beta solenoids in
  fabrication at Accel
• See table for specifications

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Medium Beta Cryomodule

• First Medium beta cryomodule in assembly
• Goal is to complete first cold test by early 2004
• Stainless steel vacuum enclosure
• LN2 cooled copper shield
• mu metal for magnetic field suppression

Lid Assembly in Assembly Frame
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Vacuum Tank

• 1.9cm thick stainless steel (316L) with external
  reinforcing ribs
• L176cm, W99cm, H196cm
• All services through 44 flanged ports on lid

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Cryogenic System

• The cryogenic system will be installed in two
  equal stages
• Timing will follow staged installation of linac
• Smooths cash flow
• Allows redundancy in final configuration

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Cryogenic Loads (Phase 1)
13W
13W
13W
13W
13W
14W
14W
3W
24W
24W
24W
24W
24W
36W
36W
6W
CM1
CM6
CM2
CM3
CM4
CM5
CM7
Medium Beta (4)
High Beta (6)
96W
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Cryogenic Loads (Phase 12)
13W
13W
13W
13W
13W
14W
14W
3W
15W
2W
2.W
3W
22W
8W
64W
8W
0W
0W
64W
32W
32W
32W
32W
32W
48W
48W
CM1
CM6
CM2
CM3
CM4
CM5
Medium Beta (4)
High Beta
CM7
540W
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Phase 1 Refrigerator (500W)

• TC50 ordered from Linde (delivery July 2004)
• 530W _at_ 4.5K and 0.7gm/sec liquifaction with LN2
  precooling
• Choice based on
• Expected Normal Loads
• 198W static and 192W active ? 390W
• Cooldown mode (maximum liquification)
• Phase 1 5.2gm/sec (150liq-ltr/hour)
• Pressure variation specification
• dP/dtlt1Torr/sec
• ?Plt10Torr

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Phase 1 Refrigerator

• TC50 comprises
• Cold box
• Main compressor
• Kaeser ESD441
• Recovery compressor
• Kaeser BSD62
• ORS and gas management system
• TRIUMF to install Linde components plus
• Helium dewar, buffer tank, warm piping and cold
  distribution

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ISAC-II Building
f1/225Hz
f1/225Hz
f1/225Hz
Compressor Room
Buffer Tanks
Refrigerator Room
Linac Distribution
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Compressor Room

• Delivery scheduled for June 2004
• TRIUMF to do installation
• Main compressor equipped with VFD for power
  saving
• ORS and gas management
• Linde system
• 17Bara

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Refrigerator Room

• Cold box
• Delivery scheduled for July 2004
• TRIUMF to do installation
• Helium dewar (1000 ltr)
• Specification written for tender
• Delivery scheduled for July 2004

24
Helium Buffer Tank (Phase 1)

• Specification for tender issued
• Required for Aug. 2004

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Cold Distribution
Cold Helium Return
LHe
CM1
CM2
CM3
CM4
Cold Box
Dewar
Warm Helium Return

• Parallel supply feed from dewar through main
  header (4.5K)
• Cold helium return (lt20K) during normal operation
• Warm helium return (gt20K) to compressor suction
  used during cooldown and for power lead cooling

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Cold Distribution Cryomodule

• Individual vacuum jacketed lines for supply and
  return
• U-tubes for supply and return to cryomodule from
  main trunk-line

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Cryogenic Distribution (Phase 1)

• Specification in preparation
• Required for June 2005

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Cryomodule Distribution

• Cryomodule cooled by forcing helium vapor to
  bottom of each cold element with a distribution
  spider

Supply He
Cold Return
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• Cryogenic Controls
• Linde TC50
• Siemans local controller
• TRIUMF to monitor with EPICS site control system
  and Prophi-bus communication
• Distribution system
• TRIUMF to control via EPICS interface

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Operating Modes

• Normal Mode (cold linac)
• Three power levels available (rf off, rf
  moderate, rf maximum)
• VFD on main compressor to save wall power
• Cooldown mode
• One or more cryomodules require cooling down
• Controlled warm-up mode
• Emergency shut-down

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• Cooldown Simulation
• Assume
• ?150 liq-ltr/hour production
• 5 hours to cool down a CM and 2 hours to fill
• Require two fills to reach thermalization

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Cool Distribution (4 hours)
CM1
CM6
CM2
CM3
CM4
CM5
CM7
150l/hr
150l/hr
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Cooldown Flows (0-7 hours) Fill CM7
4.2g/s
4.2g/s
CM1
CM6
CM2
CM3
CM4
CM5
CM7
120l/hr
50l/hr
35
Cooldown Flows (7-15 hrs) Fill CM6
7.9g/s
3.9g/s0.2x
3.8g/s
CM1
CM6
CM2
CM3
CM4
CM5
CM7
1
110l/hr
10l/hr
50l/hr
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Cooldown Flows (15-19 hrs) Refill CM7
8.1g/s
3.0g/s1.0x
3.9g/s0.2x
CM1
CM6
CM2
CM3
CM4
CM5
CM7
1
110l/hr
10l/hr
50l/hr
37
Cooldown Flows (19-26hrs) Fill CM5
6.6g/s
0.0g/s0.4x
3.5g/s
2.5g/s0.2x
CM6
CM1
CM2
CM3
CM4
CM5
CM7
2
1
100l/hr
10l/hr
10l/hr
50l/hr
38
Cooldown Flows (26-30hrs) Refill CM6
6.9g/s
0g/s.4x
2.5g/s1.0x
2.8g/s.2x
CM5
CM1
CM6
CM2
CM3
CM4
CM7
2
1
100l/hr
10l/hr
10l/hr
50l/hr
39
Cooldown Flows (30-37hrs) Fill CM4
6.1g/s
2.0g/s0.2x
3.1g/s
0.0g/s0.4x
0.0g/s0.4x
CM6
CM1
CM2
CM3
CM4
CM5
CM7
2
2
1
90l/hr
10l/hr
10l/hr
10l/hr
50l/hr
40
Cooldown Flows (37-41hrs) Refill CM5
6.3g/s
0.0g/s0.4x
2.8g/s0.2x
0.0g/s0.4x
1.7g/s0.8x
CM6
CM1
CM2
CM3
CM4
CM7
CM5
2
2
90l/hr
10l/hr
10l/hr
10l/hr
50l/hr
41
Cooldown Flows (41-48hrs) Fill CM3
5.6g/s
0.0g/s.4x
2.8g/s
0.0g/s.4x
1.4g/s.2x
0.0g/s.4x
CM6
CM1
CM2
CM4
CM7
CM5
CM3
2
2
2
80l/hr
10l/hr
10l/hr
10l/hr
10l/hr
50l/hr
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Cooldown Flows (48-52hrs) Refill CM4
6.7g/s
0.0g/s.4x
2.8g/s.2x
0.0g/s.4x
0.0g/s.4x
1.7g/s0.8x
CM6
CM1
CM2
CM4
CM7
CM5
CM3
2
2
2
80l/hr
10l/hr
10l/hr
10l/hr
10l/hr
50l/hr
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Cooldown Flows (52-59hrs) Fill CM2
6.0g/s
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
1.4g/s.2x
2.8g/s
CM6
CM1
CM2
CM4
CM7
CM5
CM3
2
2
2
80l/hr
10l/hr
10l/hr
10l/hr
10l/hr
10l/hr
50l/hr
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Cooldown Flows (59-63hrs) Refill CM3
7.0g/s
0.0g/s.4x
1.7g/s0.7x
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
2.8g/s.2x
CM6
CM1
CM2
CM4
CM7
CM5
CM3
2
2
2
80l/hr
10l/hr
10l/hr
10l/hr
10l/hr
10l/hr
50l/hr
45
Cooldown Flows (63-70hrs) Fill CM1
6.0g/s
0.0g/s.4x
1.4g/s.2x
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
2.8g/s
CM6
CM1
CM2
CM4
CM7
CM5
CM3
2
2
2
2
2
80l/hr
10l/hr
10l/hr
10l/hr
10l/hr
10l/hr
10l/hr
50l/hr
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Cooldown Flows (70-74hrs) Refill CM2
7.0g/s
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
1.7g/s0.7x
2.8g/s.2x
0.0g/s.4x
CM6
CM1
CM2
CM4
CM7
CM5
CM3
2
2
2
2
2
80l/hr
10l/hr
10l/hr
10l/hr
10l/hr
10l/hr
10l/hr
50l/hr
47
Cooldown Flows (74-81hrs) Refill CM1
6.0g/s
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
1.4g/s0.2x
2.1g/s0.7x
0.0g/s.4x
CM6
CM1
CM2
CM4
CM7
CM5
CM3
2
2
2
2
2
10l/hr
10l/hr
10l/hr
10l/hr
10l/hr
80l/hr
10l/hr
50l/hr
48
Cooldown Flows (81-86hrs) Refill CM7
3.9g/s
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
0.0g/s0.4x
1.7g/s0.2x
0.0g/s.4x
0.1g/s
CM6
CM1
CM4
CM7
CM5
CM3
CM2
2
2
2
2
2
10l/hr
10l/hr
100l/hr
10l/hr
10l/hr
10l/hr
10l/hr
1.0g/s0.9x
50l/hr
49
Cooldown Flows (86-91hrs) Refill CM6
2.2g/s
0.0g/s.4x
0.0g/s.4x
0.0g/s.4x
0.0g/s0.4x
0.0g/s0.4x
0.1g/s
0.1g/s
CM6
CM1
CM4
CM7
CM5
CM3
CM2
2
3
2
2
2
10l/hr
20l/hr
10l/hr
10l/hr
100l/hr
10l/hr
10l/hr
0.8g/s0.4x
1.0g/s0.9x
50l/hr
50
Cooldown Flows (91-96hrs) Refill CM5
2.0g/s
0.0g/s.4x
0.0g/s.4x
0.0g/s0.4x
0.0g/s0.4x
0.1g/s
0.1g/s
0.1g/s
CM6
CM1
CM4
CM7
CM5
CM3
CM2
2
3
3
2
2
10l/hr
30l/hr
10l/hr
80l/hr
20l/hr
10l/hr
10l/hr
0.8g/s0.3x
0.9g/s0.2x
1.0g/s0.8x
50l/hr
51
Cooldown Flows (96-101hrs) Refill CM4
1.6g/s
0.0g/s.4x
0.0g/s0.4x
0.0g/s0.4x
0.1g/s
0.1g/s
0.1g/s
0.1g/s
CM6
CM1
CM4
CM7
CM5
CM3
CM2
2
3
3
3
2
10l/hr
30l/hr
80l/hr
20l/hr
30l/hr
10l/hr
10l/hr
0.8g/s0.3x
0.8g/s0.3x
1.0g/s0.8x
0.8g/s0.2x
50l/hr
52
Cooldown Flows (101-106hrs) Refill CM3
1.3g/s
0.0g/s0.4x
0.0g/s0.4x
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
CM6
CM1
CM4
CM7
CM5
CM3
CM2
3
3
3
3
2
10l/hr
40l/hr
20l/hr
20l/hr
30l/hr
10l/hr
80l/hr
0.8g/s0.4x
0.8g/s0.3x
1.0g/s0.8x
0.7g/s0.2x
0.8g/s0.2x
50l/hr
53
Cooldown Flows (106-111hrs) Refill CM2
1.0g/s
0.0g/s0.4x
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
CM2
CM6
CM1
CM4
CM7
CM5
CM3
3
3
3
3
3
80l/hr
40l/hr
20l/hr
30l/hr
40l/hr
10l/hr
20l/hr
0.8g/s0.4x
0.8g/s0.4x
1.0g/s0.8x
0.7g/s0.3x
0.7g/s0.2x
0.8g/s0.2x
50l/hr
54
Cooldown Flows (111-116hrs) Refill CM1
0.7g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
CM2
CM6
CM1
CM4
CM7
CM5
CM3
3
3
3
3
3
20l/hr
40l/hr
30l/hr
30l/hr
40l/hr
80l/hr
30l/hr
0.8g/s0.4x
0.8g/s0.4x
1.0g/s0.8x
0.7g/s0.3x
0.7g/s0.3x
0.7g/s0.3x
0.8g/s0.2x
50l/hr
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Cooldown Flows (116-121hrs) Fill and Regulate
Level
0.7g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
0.1g/s
CM2
CM6
CM1
CM4
CM7
CM5
CM3
3
3
3
3
3
3
3
36l/hr
50l/hr
36l/hr
36l/hr
50l/hr
36l/hr
36l/hr
0.8g/s0.5x
0.8g/s0.5x
0.8g/s0.3x
0.7g/s0.3x
0.7g/s0.3x
0.7g/s0.3x
0.7g/s0.3x
50l/hr
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Cooldown Flows
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• Conclusion
• A 500W class refrigerator will be installed and
  commissioned at ISAC-II before year end
• Full commissioning of the cold distribution and
  first stage of the accelerator will be completed
  in 2005
• A second 500W class refrigerator will be
  installed 2007