SM 18 infrastructure focused on SPL cavity tests

SM 18 infrastructurefocused on SPL cavity tests

V. Benda, O. Pirotte, B. Vullierme

SPL cryomodule CRG/VB

SM 18 layout, current status

19.10.2010 2

6 kW Linde

RF cavity

Magnet test benches CFBs

Bloc 4 + FCM + SC Link

GReC

SM 18 cryogenic simplified flow scheme

Compressors

6 kW cold box

WPU 1

WPU 2

CFB 10x

Bloc4, Fresca 2,CL test

Cavity 4x v & 2 x h

Dryerfull flow

Precooler/adsorberSC link

/FCM

Strin

g 3

25 000 l LHedewar

Heater

SC helium

Shield

HP LP

LHe

LHe

1.9 K pumping

CCU 2 & heater 1

CCU 3 & heater 5

19.10.2010 SPL cryomodule CRG/VB 3

SPL cryomodule CRG/VB 4

Main inputs of SM 18 cryogenic infrastructure

• The 6 kW Linde cold box– Capacity: 25 g/s (700 l/h) of LHe

• The 1.8 K pumping capacity– 2 warm pumping units (WPU), each one of a following pumping speed:

• 6 g/s @ 10 mbar• 12 g/s @ 20 mbar• 18 g/s @ 30 mbar

– To each pumping unit is dedicated one very low pressure heater of 32 kW (20g/s)

– The cold compressor (CCU) & one WPU in series: 18 g/s @10 mbar– One WPU is dedicated to CFBs and Bloc 4 including CCU if necessary– Second WPU will be dedicated to cavity tests– Both WPUs can work in parallel

• New clients– Bloc 4, FCM, SC Link: LHe & pumping capacity– Cavity: Pumping capacity will required one WPU

19.10.2010


Individual tests compatible with SM18 test capacity… L. Tavian

0

5

10

15

20

25

He co

nsum

ption

[g/s

]

LHeVLP

WPU + CCU

2 WPU

6 kW cryoplant

19.10.2010


0

10

20

30

40

50

60

70

80

90

100

LHe VLP

He co

nsum

ption

[g/s

]

SPL RF moduleSPL RF cavityISOLDE RF moduleFCM, SC linksISOLDE cavityLHC RF cavityLHC RF moduleRF TLFresca 2Block 4CFB 3CFB 2CFB 1OSQAR

… but not all together ! Coordination and … L. Tavian

19.10.2010


LHe distribution & 1.9 K pumping, current status

19.10.2010 7


SM 18 upgrade,new cavity pumping lineand Bloc 4 distribution

simplified scheme

19.10.2010


2 K RF service module

19.10.2010 9

R01

SV135

SV125

SV105

SV130 SV160

DN25

DN80

DN50

DN32

CV100

CV130

FV170

FV173

FV172

FV168 FV171

FV166 FV160

P-01

GHe LP

GHe Recovery

LHe 1.5 bar

GHe Pumping

GHe return

GHe < 80 K (Thermal schield)

Exhaust

HV100

To helium guards: valves, RF cryostat...

HX01

LT105

LT100

PT105

TT120

TT130

PT130

DN

15

DN

32

DN

25

DN

15

DN

10

DN

10

DN

32

DN

15

RD100

FV140

FV135

FV115

FV125

CV105

FV165

FV167

HV130HV115

HV140HV135

HV140

DN15

PT160

PT170

CV120

TMP

HV135 To RD100To LT100

To RF


Cryo module in the bunker – simulation

19.10.2010 10

Service module Jumper

Cryo module

Interface of a cryo moduleTo be defined!


Clarification of the required cryogenic power @ 2 K

19.10.2010 11

Operating condition Value(nominal/”ultimate”)

cryo duty cycle 4.11%/8.22%

quality factor 10/5 x 109

accelerating field 25 MV/m

Source of Heat Load Heat Load @ 2K(nominal/”ultimate”)

dynamic heat load per cavity 5.1/20.4 W

static losses <1 W (tbc)

power coupler loss at 2 K <0.2/<0.2 W

HOM loss in cavity at 2 K <1/<3 W

HOM coupler loss at 2 K (per coupl.) <0.2/<0.2 W

beam loss 1 W

Total @ 2 K 8.5/25.8 W

Ultimate heat load @ 2 K for 8 cavities is:8 x 25.8 = 208 W

What is the maximum required cryogenic power @ 2 K for a module of 8 cavities: 208 W or 75W?

SPL cavity and SPL module cannot be tested simultaneously.

12

Some questions1)Cryo module interface to be defined (welded sleeve, 4 x flexibles), as well as allocated volume in the bunker for Cryo equipment.2)Required cryogenic power @ 2 K to be clarified.3)Is there any limit of dT during cool down/warm up?4)Required speed of warm up; procedure?5) What is a heat inleak to the thermal shield.6) Point A in the table ??7) Point B: Safety valve adjustment?8) Point C: Available temperature of GHe is 5 K.9) Point D: Available pressure is 0.13 MPa.

19.10.2010 SPL cryomodule CRG/VB

A B

CD

SM 18 infrastructure focused on SPL cavity tests

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