GSI-Cryoexpertmeeting; 19. & 20.09.2007
Prototype Test FacilityPrototype Test Facility
•Overview•Cryogenic measurements
•Results•Panning for a wide necked bath cryostat
•Outlook
byClaus Schroeder (GSI)
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Overview, what happendOverview, what happend
•2001: Planning starts •Spring 2004: Installation of the cryo plant•November 2004: Cryo plant in operation•Spring 2005: Feedbox installation •Summer 2005: Universal cryostat installed•November 2005: Feedboxes tested•Spring 2006: Cryogenic part of the test facility ready •April 2006: First measurements (busbars, heat exchangers) •September 2006: First magnet installed (GSI001)•February 2007: Anti-cryostat installed•August 2007: SIS100-adapter and VF-sensor tests
The team: Gerti Walter (till 2005), Stephan Berlinghof (2005-2006), Ralf Stickler (2005-2007) Franz Walter, Günter Hess, Marion Kauschke, Yu Xiang, Horst Welker, Pierre Schnizer, Andre Stafiniak and a lot of groups of GSI
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Overview, what we haveOverview, what we have
cryo plant distribution box
feedbox 1magnet
in own cryostat
power supply
TCF 50, loan byCERN; 350W@4K
Distribution and processing of thehelium;•Bath cooling•2 phase cooling 5g/s•Supercritical 150g/s•Temperatures down to 3.8K•Pressures between 1.2 and 5 bar
Feeds helium and current into the magnet;measurement of:•Mass flows •Temperatures•Pressuresfor cryogenic heat loss calculation
Enables measurements directly on the magnet;•Field measurements within the anti-cryostat•Additional sensors•2 Void fraction sensors
up to 11kAup to 14kA/s
feedbox 2universal- cryostat &
cold mass magnet
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Overview, what we haveOverview, what we have
View of the test area
Universal cryostat at the right
Distribution box between cold box and the feedboxes
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Cryogenic measurementsCryogenic measurements
GSI001 during its installation in the universal cryostat at the test facility
Cryosystem:
6200h Total running time2000h with pumping unit at 60g/s
Cryostat:Table could be cooled to LHe-temperatureShield could be cooled by LN2 or GHe
Cooldown:GSI001: 20h
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Cryogenic measurementCryogenic measurement
Schematic sketch of the measurement
MF1
MF2
current lead-Box
PT11
PT13
MF3
SZF-Ventil
TT11
to the distribution box
TT22
from the distribution box
shield
GSI001
Current leads
warm to Coldbox LP
coldmassflow sensors
inlet pressure andtemperature sensors
outlet pressure andtemperature sensors
MF4
warmmass flow sensors
heat loss = m(h(pout;tout))-h(pin;tin))
.
GSI-Cryoexpertmeeting; 19. & 20.09.2007
ResultsResults
07:12 09:36 12:00 14:24 16:48 19:12-20
0
20
40
60
80
100
120
AC
hea
t los
s [W
]
time [hh:mm]
AC heat loss
15,9
30,1
53,2
7,1
17,0
34,0
peak: 109
04.05.2007GSI001
+-3W
Error:
3T
2T/s
3T
4T/s
4T
1T/s
3T
3T/s4T
2T/s
4T
3T/s
quenches
Bmax=2.17T
0,000
5,000
10,000
15,000
20,000
25,000
30,000
Calc 2.17T VI set 2 VI BNL Calor set2
Hyst
Eddy Slope
Typical result for calorimetric measurement Comparison of calculated an measured values
0 2 46400
6500
6600
6700
6800
6900
7000
7100
7200
7300
7400
7500
7600
7700
7800
7900
Imax
IQuench
IQuench
@ BNL
I[A]
dB/dt [T/s]
Quenchcurrent of GSI001
Quench measurements
For GSI001:•Quench measurements•AC loss measurements (calorimetric)•AC loss measurements (V-I-method)
GSI-Cryoexpertmeeting; 19. & 20.09.2007
ResultsResults
0 20 40 60 80 1000,25
0,30
0,350,40
0,45
0,50
0,550,60
0,65
0,70
0,75
0,800,85
0,90
0,95
1,001,05
1,10
1,15
Vo
id fr
act
ion
Power Heater EH11
[W]
VF1 VF2
0 20 40 60 80 1004,50
4,55
4,60
4,65
4,70
4,75
4,80
4,85
4,90
Power Heater EH11
[W]
Out
let T
emoe
ratu
re
Temp1 Temp2
Ongoing tests with Void Fraction sensors and SIS100 adapter:
VF-sensor-2 seems to work.VF-sensor-1 we find problems in the RF-detector(will be fixed by JINR)
SIS100-adapter worked up to 7,7kA DCand up to 8kA/s continuous ramping to 7kA.Above this values quenches appear in the cablebetween feed through and junction.
We will redo this test with more voltage taps, in order to define the exact weak point.
SIS100-adapter has to work at 14kA/s rampingto 7kA (4T/s to 2T)
Testresults of void fraction sensor
GSI-Cryoexpertmeeting; 19. & 20.09.2007
planning for a wide necked bath cryostat planning for a wide necked bath cryostat ??
Planning and installation of a wide-necked bath cryostat with 1,8m diameter for the test of the 13to SuperFRS magnetsas the third test bench:
GSI-Cryoexpertmeeting; 19. & 20.09.2007
planning for a wide necked bath cryostat planning for a wide necked bath cryostat ??
Overview of the existing testfacility and the possible location of the wide neck cryostat.For this location a rearrangement in the hall is needed. A location nearer to the distribution box isnot possible due to a gully under the floor.
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Outlook, next testsOutlook, next tests
•Installation and tests of first SIS100 model magnetstarts October
•Preparation of the 2. test bench for testing full size model magnetsshould be ready in December
GSI-Cryoexpertmeeting; 19. & 20.09.2007
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Distribution boxDistribution box
Barber nickelson pump: 50-200g/s
Ejector:temperatures down to 3.8K
LHe-reservoir
Inlet heat exchangerfor temperatureregulation
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Cooling of the heat exchangerCooling of the heat exchanger
GSI-Cryoexpertmeeting; 19. & 20.09.2007
2 phase cooling2 phase cooling
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Supercritical coolingSupercritical cooling
GSI-Cryoexpertmeeting; 19. & 20.09.2007
FeedboxFeedbox
SZF-Box
TS01A/B TS01A/B
SZF-Ventil
CV11
CV12
to Coldbox LP TS02 TS02
to distribution box
from distribution box
MF4
shield
magnet
to Coldbox LP
TT1 Vapour pressor thermometerTT2 Ressistive temperature sensor (Cernox)TT3 Ressistive temperature sensor (Cernox)EH1 Heater 100WEH2 Heater 500WCV1 Control valveMF Massflow meter
MF1
MF2
PT11 TT11
TT12 TT13TT21
PT12
TT22
PT13
TT23
PT14
TT31 TT14
TT32
EH11
EH12
EH21
EH22
MF3
MF4
Inlet 1
Inlet 2
Outlet 1
Outlet 2
GSI-Cryoexpertmeeting; 19. & 20.09.2007
ResultsResults
1T/s 2T/s 3T/s 4T/s
1T 6,9W 15,3W 28,6W 44,3W
2T 7,6W 16,3W 30,8W 52,1W
3T 7,6W 15,9W 30,1W 53,2W
4T 7,1W 17,0W 34,0W quench
heat losses measured at GSI (including bus-bars):
1T/s 2T/s 3T/s 4T/s
1T 7,5W 20W* 36W* 58W*
2T 7,5W 20W 37,5W* 60W*
3T 7,5W 19W 36W 59W*
4T 7,8W 20,5W 38,3W 62,5W*
heat losses measured at BNL:
* = extrapolated values
Bmax=2.17T
0,000
5,000
10,000
15,000
20,000
25,000
30,000
Calc 2.17T VI set 2 VI BNL Calor set2
Hyst
Eddy Slope
GSI-Cryoexpertmeeting; 19. & 20.09.2007
measurements of GSI and BNLmeasurements of GSI and BNL
0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,50
20
40
60
80
100
dB/dt [T/t]
he
at l
oss
[J/c
ycle
] Messwerte GSI 1T
Messwerte GSI 2T
Messwerte GSI 3T
Messwerte GSI 4T
Fit-Messwerte BNL 1T
Fit-Messwerte BNL 2T
Fit-Messwerte BNL 3T
Fit-Messwerte BNL 4T
Fit-GSI 1T
Fit-GSI 2T
Fit-GSI 3T
Fit-GSI 4T
Comparison between the measurements of GSI and BNL
GSI-Cryoexpertmeeting; 19. & 20.09.2007
1T/s 2T/s 3T/s 4T/s
1T 7,5W 20W* 36W* 58W*
2T 7,5W 20W 37,5W* 60W*
3T 7,5W 19W 36W 59W*
4T 7,8W 20,5W 38,3W 62,5W*
heat losses measured at BNL:V-I-method
* = extrapolated values
1T/s 2T/s 3T/s 4T/s
2T 7,5W 19,7W 37W 60W
2Tupper coil
4W 10,3W 20W 32W
2Tlower coil
3,6W 9W 17W 28W
2Tsum upper and lower
7,5W 19,3W 37W 60W
heat losses measured at GSI:V-I-method
GSI-Cryoexpertmeeting; 19. & 20.09.2007
measurements of GSI and BNLmeasurements of GSI and BNL
0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,50
20
40
60
80
100
dB/dt [T/t]
he
at l
oss
[J/c
ycle
] Messwerte GSI 1T
Messwerte GSI 2T
Messwerte GSI 3T
Messwerte GSI 4T
Fit-Messwerte BNL 1T
Fit-Messwerte BNL 2T
Fit-Messwerte BNL 3T
Fit-Messwerte BNL 4T
Fit-GSI 1T
Fit-GSI 2T
Fit-GSI 3T
Fit-GSI 4T
Comparison between the measurements of GSI and BNL
GSI-Cryoexpertmeeting; 19. & 20.09.2007
Errors of cryogenic heat loss measurementErrors of cryogenic heat loss measurement
1T/s 2T/s 3T/s 4T/s
1T 6,9W±3W(43%)
13,8 J/cycle
15,3W ±3W(19%)
15,3 J/Cycle
28,6W ±3W(10%)
27W by heater*19 J/Cycle
44,3W ±3W(7%)
41W by heater*22,2 J/Cycle
2T 7,6W ±3W(40%)
30,4 J/cycle
16,3W ±3W(18%)
32,6 J/Cycle
30,8W ±3W(10%)
38W by heater*41 J/Cycle
52,1W ±3W(6%)
57W by heater*52,1 J/Cycle
3T 7,6W ±3W(39%)
45,6 J/cycle
15,9W ±3W(19%)
47,7 J/Cycle
30,1W ±3W(10%)
28W by heater*60,2 J/Cycle
53,2W ±3W(6%)
56W by heater*79,8 J/Cycle
4T 7,1W ±3W(42%)
56,8 J/cycle
17,0W ±3W(17%)
68 J/Cycle
34,0W ±3W(9%)
40W by heater*90,7 J/Cycle
quench
*by heater; means an inexact additional measurement using the heater power measurement in the distribution box (±10W)