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Task description<o:p></o:p> |
Introduction by …<o:p></o:p> |
Treated in WG-Session #<o:p></o:p> |
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Cavity design<o:p></o:p> Introduction<o:p></o:p> |
Frank Gerigk<o:p></o:p> |
1<o:p></o:p> |
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Make recommendation on geometrical beta based on beam dynamics issues, in view of the impact on power dissipation, max. gradient, and required instrumentation<o:p></o:p> |
<o:p> </o:p> |
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Optimize cavity geometry w.r.t. peak fields, multipactor, robustness against Lorentz-force detuning, tunability, HOM spectra, cross-talk between cavities, …<o:p></o:p> |
<o:p> </o:p> |
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HOM coupler<o:p></o:p> Introduction<o:p></o:p> |
Joachim Tuckmantel/Hans-Walter Glock<o:p></o:p> |
1<o:p></o:p> |
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Acquire results on HOM impedances, beam instability studies, and interaction between cavities via HOM propagation<o:p></o:p> |
<o:p> </o:p> |
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Define strategy on HOM coupler design, prototyping and testing<o:p></o:p> |
<o:p> </o:p> |
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Design HOM coupler (antenna vs. beam tube absorber), and cooling layout<o:p></o:p> |
<o:p> </o:p> |
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Perform multipactor studies<o:p></o:p> |
<o:p> </o:p> |
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Identify manufacture and conditioning capacities<o:p></o:p> |
<o:p> </o:p> |
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Identify required equipment for HOM coupler tests (do we need room temperature model cavity?)<o:p></o:p> |
<o:p> </o:p> |
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Manufacturing of cavities<o:p></o:p> Introduction<o:p></o:p> |
NN<o:p></o:p> |
2<o:p></o:p> |
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Identify potential Labs with manufacturing competence (in house or with industry)<o:p></o:p> |
<o:p> </o:p> |
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Identify potential commercial manufacturers<o:p></o:p> |
<o:p> </o:p> |
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Agree on manufacturing and processing sequence<o:p></o:p> |
<o:p> </o:p> |
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Identify required equipment (e.g. field flatness, frequency tuning) and what equipment is missing<o:p></o:p> |
<o:p> </o:p> |
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Processing of cavity to obtain design performance<o:p></o:p> Introduction<o:p></o:p> |
Sergio Calatroni<o:p></o:p> |
2<o:p></o:p> |
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Define strategy to reach full performance (25 MV/m for b = 1 cavities) for a fully equipped prototype cryomodule<o:p></o:p> |
<o:p> </o:p> |
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Identify required equipment (e.g. electro-polishing, HPWR) and what is missing<o:p></o:p> |
<o:p> </o:p> |
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RF tests of individual cavities<o:p></o:p> Introduction<o:p></o:p> |
Pierre Maesen<o:p></o:p> |
2<o:p></o:p> |
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Identify need of re-processing and re-testing, the equipment required and what is missing<o:p></o:p> |
<o:p> </o:p> |
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Diagnosis<o:p></o:p> Introduction<o:p></o:p> |
NN<o:p></o:p> |
2<o:p></o:p> |
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Define required equipment (on-line: Temperature mapping and other diagnostics methods in super-fluid helium) and what is missing<o:p></o:p> |
<o:p> </o:p> |
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Define required equipment (off-line: Optical inspection system) and what is missing<o:p></o:p> |
<o:p> </o:p> |
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Assembly of and test of fully equipped cryomodule<o:p></o:p> Introduction<o:p></o:p> |
Pierre Maesen<o:p></o:p> |
3<o:p></o:p> |
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Identify required equipment, monitoring devices and what is missing<o:p></o:p> |
<o:p> </o:p> |
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Do we need to simulate the slope?<o:p></o:p> |
<o:p> </o:p> |
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High power RF coupler<o:p></o:p> Introduction<o:p></o:p> |
Guillaume Devanz/ Eric Montesinos<o:p></o:p> |
3<o:p></o:p> |
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Define the conceptual design, the layout of cooling (including thermal loads) and diagnostical tools, choice of materials (waveguide, window)<o:p></o:p> |
<o:p> </o:p> |
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Perform multipactor studies, assess methods of multipactor suppression and elaborate coating techniques<o:p></o:p> |
<o:p> </o:p> |
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Measure secondary emission coefficient (SEC) of materials involved<o:p></o:p> |
<o:p> </o:p> |
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Identify manufacture and conditioning facilities<o:p></o:p> |
<o:p> </o:p> |
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Identify required equipment for coating and conditioning<o:p></o:p> |
<o:p> </o:p> |
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Frequency tuner<o:p></o:p> Introduction<o:p></o:p> |
Guillaume Devanz<o:p></o:p> |
3<o:p></o:p> |
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Perform by computer simulation Lorentz-force detuning studies of cavity design and confirm by measurement<o:p></o:p> |
<o:p> </o:p> |
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Develop and test slow tuner; integrate the design into that of the cryomodule<o:p></o:p> |
<o:p> </o:p> |
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Develop and test fast tuner; integrate the design into that of the cryomodule<o:p></o:p> |
<o:p> </o:p> |
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Develop scenarios for failing cavities (detuning)<o:p></o:p> |
<o:p> </o:p> |
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Magnetic shielding<o:p></o:p> Introduction<o:p></o:p> |
NN<o:p></o:p> |
3<o:p></o:p> |
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Design by computer simulation or analytically the magnetic shielding; manufacture it<o:p></o:p> |
<o:p> </o:p> |
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