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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
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
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
Cryostat intervention MRB - old system helium-4
Flange welded
Cold window clamps
He line
Vacuum line
Cryostat intervention MRB - new system helium-3
cryovalve
70K shield
2K return pipe
70K clamp
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
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
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
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 ?
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