prototype test facility

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)


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


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


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


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


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))

.


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)


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


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:


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.


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


Distribution boxDistribution box

Barber nickelson pump: 50-200g/s

Ejector:temperatures down to 3.8K

LHe-reservoir

Inlet heat exchangerfor temperatureregulation


Cooling of the heat exchangerCooling of the heat exchanger


2 phase cooling2 phase cooling


Supercritical coolingSupercritical cooling


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


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


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-GSI 1T

Fit-GSI 2T

Fit-GSI 3T

Fit-GSI 4T

Comparison between the measurements of GSI and BNL


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


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-GSI 1T

Fit-GSI 2T

Fit-GSI 3T

Fit-GSI 4T

Comparison between the measurements of GSI and BNL


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%)


3T 7,6W ±3W(39%)

45,6 J/cycle

15,9W ±3W(19%)

47,7 J/Cycle

30,1W ±3W(10%)


53,2W ±3W(6%)


4T 7,1W ±3W(42%)

56,8 J/cycle

17,0W ±3W(17%)

68 J/Cycle

34,0W ±3W(9%)


quench

*by heater; means an inexact additional measurement using the heater power measurement in the distribution box (±10W)

prototype test facility

Documents

test areauniversal cryostat

magnetfield measurements

measurements busbars

anticryostat installedaugust

measurementheat loss

test facilitycryosystem

cold box

test facility ready