1. Overview – Nb3Sn Furnace
TE - MSC - LMF
Internal review of the 11T reaction fixture and impregnation mould
Description of the reaction oven and of the fixture
Wed 19/10/2016
F. Lackner, P. Revilak, C. Scheuerlein, D. Smekens, M. Duret, S. Luzieux
S. Triquet, J.L. Rudeiros Fernandez, F. Meuter
Overview – Nb3Sn Furnace
F. Lackner, Oct. 2016
F. Lackner & P. Revilak, RHT / internal review

2. MSC – Reaction furnaces in MDT & LMF, specification:
F. Lackner & P. Revilak, RHT / internal review

3. Coil preparation and mould closure Mould into retort Closure of retort
RHT sequence:
Coil preparation and mould closure
Mould into retort
Closure of retort
Fast purging with Ar till required Oxygen reduction is achieved (<< 10 ppm)
Ar purging with reduced flow during heat cycle (Fixture + retort)
Ramping 1 (250 ̊C at 50 ̊C/h)
Plateau 1 (250 ̊C for 48h)
Ramping 2 (400 ̊C at 50 ̊C/h)
Plateau 2 (400 ̊C for 48h)
Ramping 3 (650 ̊C at 50 ̊C/h)
Plateau 3 (650 ̊C for 50h)
Obsolete: Fast cooling with about 1200 m3/h, hot air extraction from furnace chamber
F. Lackner & P. Revilak, RHT / internal review

4. Inert gas and retort based Nb3Sn RHT furnace building 180:
Cooling flaps
Furnace chamber with separation
Supplier: Gero, Neuhausen (DE)
Power consumption: 150 kW
Treatment length: 6.5 m
Max load: 700 kg/m
Fast cooling: 1200 m3/h
Purging: l/h
O2 << 10 ppm within 6 hours
Fast cooling fan
Heater connection box
Chariot with separation chamfer
F. Lackner & P. Revilak, RHT / internal review

5. Dimensions:
F. Lackner & P. Revilak, RHT / internal review

6. Gas piping layout: Bypass line: Quick purging up to 1600 - 20000 [l/h]
Main line: Flow control up to 6000 [l/h]
Ar dewar bldg. 297
Purging (GERO): 5-7x Vretort = about (Or evacuation at RT)
Min. required O2 for launching process: 5 to 10ppm)
F. Lackner & P. Revilak, RHT / internal review

7. Inner furnace space - Heat zones:
Zone 3 (Master)
Zone 2
Zone 1 (Floor)
500
6500
Zone 1: Installed inside the retort support chariot. Covered by SiC plates.
600
Zone 2: Master zone for control. Can be switched to other zones.
One central temperature gage per side (5 in total)
F. Lackner & P. Revilak, RHT / internal review

8. Gas piping layout: Retort 4150 l
Rare face
Exhaust
O2 gage
Bypass line
Magnet valve
10 bar
2 bar
Overpressure
Flow regulator
P control
Argon
Retort – 1150 l
Retort 4150 l
Door
Preparation
by customer
Massflow control
Main line
T-connector
Cutting ring connection ø12mm
Bypass line: Quick purging up to [l/h]
Main line: Flow control up to 6000 [l/h]
Installation either based on bottles or fixed gas tank in front of bldg. 927
Purging (GERO): 5-7x Vretort
Min. required O2 for launching process: < 1% (Sensor resolution: 5 to 10ppm)
F. Lackner & P. Revilak, RHT / internal review

9. Loading sequence: TE-MSC-LMF
Preparation for loading, park position of transfer table:
Door
Thermal insulation
Graphite plate
Retort
Nb3Sn tooling
Lifting system
Support profiles
Rails
Transfer table
Basement
Loading step 1: transfer table rails in front of retort:
Thermal insulation
F. Lackner & P. Revilak, RHT / internal review

10. Loading sequence: TE-MSC-LMF
Loading step 2: tooling inside the retort – connection of Ar tubing and T-gages
Thermal insulation
Loading final, start of purging and afterwards the heat cycle:
Thermal insulation
Argon:
Purging: max: 12 m3/h
Operation: min: 1 m3/h
F. Lackner & P. Revilak, RHT / internal review

11. Fast cooling sequence:
TE-MSC-LMF
Fast cooling process:
Extraction
Hood O2
Flaps
Thermal insulation
Argon:
Purging: max: 12 m3/h
Operation: min: 1 m3/h
F. Lackner & P. Revilak, RHT / internal review

12. Tooling transfer table:
Yellow parts are moving inside the retort
Graphite plate is placed on top
Inside the retort the support is rolling on the retort surface
Hydraulic lifting device
Rail guiding
Length providing guiding
when placed inside the retort
F. Lackner & P. Revilak, RHT / internal review

13. Cycle from 5.5 m coil RHT:
F. Lackner & P. Revilak, RHT / internal review

14. Functions OF REACTION TOOLING
(P1) Conserve coil in nominal geometry (stability at 700 degC)
(P2) Protection of coil from mechanical distortion (Handling after RHT)
(P3) Support/generate oxygen-low environment
(P4) Facilitate evacuation of debris from coil
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15. Basis: Tooling designed by US-LARP Nb3Sn program
Evolution of tooling
Basis: Tooling designed by US-LARP Nb3Sn program
Short model tool: Small changes to achieve higher rigidity
Long prototype tooling: Enlargement of tool for better accessability, adittion of Ar-guide grids
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16. Referencing coil cavity and baseplate
Geometrical setup
Referencing coil cavity and baseplate
Ensuring smooth cavity surface (joining blocks)
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17. Geometrical setup: Principal setup tool
Referencing coil cavity and baseplate
“Align center of formblock radius with middle of baseplate”
X-direction, Y-direction, Z- direction
2. Ensuring smooth cavity surface (joining blocks)
(X-direction), Y-direction, (Z- direction)
Reference surface
Delta 10.5 mm
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18. Geometrical setup: Layers
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19. Geometrical setup: Layers
0-Reference baseplate surface
1-MICA (provision in mandrill design)
2-mandrill (r= mm)
3-MICA21 (0.125)
4-MICA-22 (0.125)
5-COIL (OD nom.: 60.6)
6-MICA31(0.125 mm)
7-MICA32 (0.125 mm)
8-GRIDFOIL01(0.5 mm)
9-GRIDFOIL02 (0.3 mm)
10-SEALFOIL (0.5 mm)
Nominal Gap = 0.1 mm
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20. Possibilty to “flush” coil with Argon
Argon guide
Intention:
“Worries to make sure, there is a continuous Argon atmosphere along the 6m tool”
Objectives:
Tight chamber
Possibilty to “flush” coil with Argon
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21. Endplates sealed with MICA-sheets (as Fermilab and 927)
Argon guide:
SEALING and gaskets:
Endplates sealed with MICA-sheets (as Fermilab and 927)
Lateral seal: only compaction of steel sheet
GUIDE system:
Pipe to transfer AR inside the mandrels
Holes and channels in the mandrel to distribute on coil inner radius
Grid system on coil outer radius to transport Argon to outlet
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22. Argon guide: Setup: Ar Ar Fixture Saddles Coil Grid foil Interlayer
VAMAS
volume
Mandrell
Ar-pipe
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