Presentation is loading. Please wait.

Presentation is loading. Please wait.

Agenda – Basics of cavity integration into CAST Introduction (M Davenport) Information exchange 2016 – Vacuum in cold bore – 2 cavities Cooling RF Cavities.

Similar presentations


Presentation on theme: "Agenda – Basics of cavity integration into CAST Introduction (M Davenport) Information exchange 2016 – Vacuum in cold bore – 2 cavities Cooling RF Cavities."— Presentation transcript:

1 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

2 New vacuum tight flange with electrical feedthroughs to replace the gate valve AMP + circulator @ 1.8K Cavities at 1.8K New vacuum tight flange with electrical feedthroughs This pipework would be removed First Concept – means feedthrough between antenna and amplifier

3 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 Present concept : direct line between antenna and amplifier

4 Cryostat intervention MRB - old system helium-4 Flange welded Cold window clamps He line Vacuum line

5 Cryostat intervention MRB - new system helium-3 cryovalve 70K shield 2K return pipe 70K clamp

6 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

7

8 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 pumps 2015 system

9 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 pumps 2016 system ?

10 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 pumps 2017 system ? ? blank flange


Download ppt "Agenda – Basics of cavity integration into CAST Introduction (M Davenport) Information exchange 2016 – Vacuum in cold bore – 2 cavities Cooling RF Cavities."

Similar presentations


Ads by Google