Transcript HQ TEST PLANS @ CERN by Marta Bajko CERN TE

FRESCA2 TEST PLANS @ CERN
by Marta Bajko and A. Van de Crane CERN TE MSC TF/CI
on behalf of
Vladislav Benda, Paolo Ferracin, Christian Giloux, Pierre Minginette, P. Perret, Gijs De Rijk, Patrick Viret
For EuCARD FRESCA2 Review @ LASA- September 2012 CERN
19/09/2012
Marta Bajko TE-MSC TF
1
Summary
•
•
•
•
•
•
•
Cryogenic test station status at CERN
Inputs and constraints for the test station design
Main ingredients of the HFM test station
Status of the main ingredients
Cryogenic cooling system
Which measurements can be done?
Update of the planning
19/09/2012
Marta Bajko TE-MSC TF
2
Cryogenic test station SM18 layout
Vertical test benches
19/09/2012
Horizontal test benches
Marta Bajko TE-MSC TF
3
The inputs and constrains for the HFM test station
Magnet parameter description
FRESCA2
LD1
HTs Insert
Unit
Maximum current Iss@ 1.9 K
Free aperture diameter
Maximum length
Maximum outer diameter
Maximum weight
Maximum stored energy @ Iss @ 1.9K
Inductance
Max ramp rate
Splice dissipation
Maximum heat dissipation (when ramping)
14.9
0.1
2.5
1.03
9
6.5
63
150
3.5
10
18.1
0.1
2.5
1.36
15
9.2
56
10
0.02
0.75
0.1
10
<1
kA
m
m
m
t
MJ
mH
A/s
W
W
Requirement
Estimated Lifetime of the high field magnet test facility
Number of thermal cycles (293 K to 1.9 K and back)
Quenches
Number of powering cycles of the magnet
Number of powering cycles of the inserts
Environmental conditions in the experimental hall
Radiation levels
19/09/2012
Marta Bajko TE-MSC TF
1
20
150
Value
> 20 years
≤ 200
≤ 4000
≤ 10000
≤ 5000
200 mT
No radiations
4
Main ingredients of the HFM test station
Cold buffer
20 kA power Converter
Dump Resistor
Cryogenic Control
Cryogenic rack
Control Room
Valve box
DAQ
Pumping line
19/09/2012
HFM
cryostat
Marta Bajko TE-MSC TF
10 kA power Converter
Installed
5
Summary of the status of the main ingredients
20 kA powering circuit
Power supply 20 kA /60 V : available
Switches: available
Cupper bus bars: available
Water cooled cables addressed
Connection to current leads addressed
Copper current leads addressed at CERN
Water distribution critical
Cryogenics
He gas and LHe pipes : design done
precooling line
quench line
main line
shielded line
pumping line
Cold He gaz buffer
Pre cooling valve box
Cryogenic valve box
Cryogenic rack
Cryogenic control addressed but critical
10 kA powering circuit
Power supply 10 kA/8 V installed
Switches to be addressed
Cupper bus bars design of integration
Water cooled cables design of integration
Connection to current leads addressed
Copper current leads addressed at CERN
Water distribution critical
Security PLC to be addressed
DAQ available
Magnet protection circuit
Dump resistor available for 20 kA circuit, to be
addressed for 10 kA circuit
Capacitor benches available, to be checked if
adapted to the needs
Cryostat: design finished See the presentation of Arnaud
Civil engineering for 10 kA powering circuit and cold buffer support: addressed
Cabling ( power and control) : addressed but critical during LS1
19/09/2012
Marta Bajko TE-MSC TF
6
Cooling of the magnet
280
Temperature [K]
240
200
160
300-80 K
8h
120
80 -4.2 K
8h
80
4.2 -1.9K
24-36 h
40
0
0
10
20
30
40
50
Time [h]
19/09/2012
Marta Bajko TE-MSC TF
7
Cooling from 300 K to 80 K
280
Temperature [K]
240
200
160
300-80 K
8h
120
80
40
0
0
10
20
30
Time [h]
40
50
Cooling from 300 K to 80 K
Pre cooling valve
box
Cooling from 80 K to 4.2 K
280
Temperature [K]
240
200
160
300-80 K
8h
120
80 -4.2 K
8h
80
40
0
0
10
20
30
40
50
Time [h]
19/09/2012
Marta Bajko TE-MSC TF
10
Cooling from 80 K to 4.2 K
Cooling from 4.2 K to 1.8 K
Pumping
280
Temperature [K]
240
200
160
120
80 300-80 K
8h
40
80 -4.2 K
8h
0
0
10
20
4.2 -1.9K
24-36 h
30
40
50
Time [h]
19/09/2012
Marta Bajko TE-MSC TF
12
Cooling from 4.2 K to 1.8 K
Pumping
LHe/GHe heat exchanger
1.9K Cooling power up to
150W at 2K
Filling
Heat in-leak estimation at 1.9K
Qnom=25W, Qdyn=40W, Qc-d=100W
LHe/LHe heat exchanger, 1.9K
Cooling power 100W,
dT ≈30mK during cool down and
dT≈10mK @ nominal condition
Cooling of shields
280
Temperature [K]
240
200
160
Shield cooling 3 days
120
80
40
0
0
10
20
30
Time [h]
40
50
He gas recuperation after quench
If T after quench>
30-40 K the cold gaz
from the buiffer will
be used for the
magnet cooling
Cryogenic installations : summary
1.9 K pumping line
Pre-cooling valve box
Installations needed
He gas and LHe pipes :
precooling line
quench line
main line
shielded line
pumping line
Pre-cooling line
“Kabelmetal”
line
Cold He gaz buffer
Pre cooling valve box
Cryogenic valve box
Cryogenic rack
Heater
He rack
Heater
Quench line
Cold buffer
Main line
Test cryostat
Valve box
3/9/2012
Courtesy of Vladislav Benda CERN, TE-CRG
16
Measurements to do
– Electrical integrity (HiPot, Insulation, Continuity)
– RRR during cool down and warm up
– Splice resistance measurements
– Inductance measurements
– Powering test at 1.9 K and quench localization with V taps ( eventually also quench
antenna but it represent an important extra work)
– Protection heater study if required ( we need to know the time constant or the deposited
energy on the heaters to set up the circuits; we have up to 400 V or lower and fixed
capacitor benches with units of 14 mF)
– Mechanical measurements with strain gauges
– Magnetic measurements
19/09/2012
Marta Bajko TE-MSC TF
17
When we can test?
First Magnet Test
February March 2014
….An estimate made on our best guess….
The cryogenic supply package is defined , a
dedicated engineer arrived and starts
working on the different items from this
week. This package is certainly the limiting
factor in the planning….
19/09/2012
Marta Bajko TE-MSC TF
18