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Agenda – Basics of cavity integration into CAST
• Introduction (M Davenport)
• Information exchange• 2016 – Vacuum in cold bore – 2 cavities• Cooling
• RF Cavities in cold bore• Vacuum, need good thermal contact (pressure or indium/copper braid …….)• Is 1.8K essential for 2016 run?
• Amplifier/circulator vessel• What is maxm temperature allowed?
• Size of cavities wrt cold bore• Be conservative in dimensions for 2016• Exact values can be used for 2017
• ‘Fixing’ cavities in cold bores• Thompson’s gun –effect at a quench?• Good thermal contact needs pressure contact?
• Instrumentation• Temperature probes etc
• Metrology• Precise internal diameter of cold bore
• Design study for integration
• 2017 – Helium possible in cold bores – up to 14 cavities ?• Cooling
• RF Cavities in cold bore – via helium• Amplifier/circulator
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New vacuum tight flange with electrical feedthroughs to replace the gate valve
AMP + circulator
@ 1.8KCavities at 1.8K
New vacuum tight flange with electrical feedthroughs
This pipework would be removed
First Concept – means feedthrough between antenna and amplifier
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New vacuum tight flange with electrical feedthroughs to replace the gate valve
Cavities at 1.8K
New Vessel at 2K with flange with electrical feedthroughs
amp
amp
Present concept : direct line between antenna and amplifier
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Cryostat intervention MRB - old system helium-4
Flange welded
Cold window clamps
He line
Vacuum line
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Cryostat intervention MRB - new system helium-3
cryovalve
70K shield
2K return pipe
70K clamp
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New vacuum vessels for preamps and circulators off-centre to avoid obstacles
2016 run – be conservative in size of vessels. Take measurements in situ for 2017 versions
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MM2
HV201HV204
MFB SIDESunrise
MM3
MM
CCD
Expansion Volume [450 l]
Storage Volume [1000 l]
3He T
ran
sfer syste
m
LN2RT
Trap Purge System
Vstore
PI101
PT203
PT202PI201 PV208 PV207
PV211
HV103
PV101
HV301
PV305
HV311
HV312
PV306
HV307
PV308
HV209PI206
PT102
PV102
PV106 PV105
PT104
HV104
PI103
V#10
HV210
HV302
CV111
HV309
HV303HV304
P313
P111
PV108
CV107PV112
PV109
PI105
PT106V-215
V#2
PV310
HV313 HV110
LN2
RT
Not on magnet
P212
Pu
mp
Oil p
urg
e
system
PV212
PT208
PT308
P
P
P P
P
PPT306
PPT307
PV314HV315
V-205
Telesc.
3He /4He calib. gas
Vac 1Admit air
MRB SIDESunset
V-209B
PNUNOP
BB
Drytel 2Primary
P1BA
P2BA
P3BAP3
P4BA
P4PCCD
PMM
VT1
VT2
P10
PP P
PP
P
P
P
(Gas 11)
(Gas 12)
(Gas 13)
V Slow
V Fast
Not
on
mag
net
LD
(Gas 1)
(Gas ?)
PT212 PT207
P VACL0-1000 lin
P7 (ion)P
P
P P7BA
Drytel 1
Vdt 1
P V12
P
SIP
Vac 5
Vac 7
Pir 2
Vac 3
Vac 2
Vac 4
LEP MFB
Not o
n mag
net
Residual Gas
Vac 6
Ion_P
Pir 1
P6BA R
P6BAP
PP
P
filter
turbo
turbo
P
Jaime pump
PPTPC
Leak detection /gas
analyser
VLD
Vac 13
P
P9
Vac 11Vac 12
Vac 14P8BA
Vac 15
turbo
PrimaryP7 pump
P
Vssmm
PV107
P-57
PPT
204
NV
202
CV
203
PT
205
PV
205
PCV
206
1.8 K
~293 K
~70 K (thermal shieldi ng)
VT3
VT4
Oil return
Thin x-ray cold windows
Thin x-ray cold windows
2bar
LEP MFB
P
P PT304
P PT302
PI301
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2K
Old Helium-3 gas /vacuum system
Connected thermally but no gas /vacuum connection
70K thermal shield 70K thermal clamp
2K
~40K
70K
300K
Vac pumpsVac pumps2015 system
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2K
Old Helium-3 gas /vacuum system
Connected thermally but no gas /vacuum connection blank flange
70K thermal shield 70K thermal clamp
2K
2K ??
70K
300K
Vac pumpsVac pumps2016 system ?
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2K
Old Helium-3 gas /vacuum system
Connected thermally but no gas /vacuum connection blank flange
70K thermal shield 70K thermal clamp
2K
2K ??
70K
300K
Vac pumpsVac pumps2017 system ?
?
blank flange