1st SPL Collaboration Meeting
→
Europe/Zurich
AT Auditorium (CERN)
AT Auditorium
CERN
Roland Garoby
(CERN)
Description
MEETING GOALS:
- to review specifications and technical choices + to set deadlines for decision on pending questions,
- to define the precise contribution of each partner (deliverables and planning) and the interactions between partners (names of persons in charge, exchange of information/hardware, planning of meetings, …),
- to propose how to demonstrate 25 MV/m (Beta=1) and 19 MV/m (Beta =0.65) before mid-2011
- to list untreated subjects and collect suggestions for addressing them,
- to organize the collaboration (Constitution?),
- to define the dates of the main meetings until end of 2009.
Support
Participants
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Coffee break AT Auditorium
AT Auditorium
CERN
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Plenary session 2: planned contributions to the SPL AT Auditorium
AT Auditorium
CERN
- 4
- 5
- 6
- 7
- 8
- 9
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Lunch -
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CERN
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4 rooms are available for the 4 workings groups:
- AT auditorium
- 30-2-005
- 112-R-028
- 112-R-034- 10
- 11
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12
Cockroft Instutute - HP RF Expertise and Areas of InterestSpeaker: Amos Dexter
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Working Group 2 - Session 1 (with WG 4) AT Auditorium
AT Auditorium
CERN
- 13
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14
Discussion on cavity beta and other design issuesOther design issues: Optimize cavity geometry w.r.t. peak fields, multipactor, robustness against Lorentz-force detuning, tunability, HOM spectra, cross-talk between cavities (from HOM or electron propagation, ...) Identify potential contributers and deadlines
- 15
- 16
- 17
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18
Discussion HOM couplerPossible issues: - Acquire results on HOM impedances, beam instability studies, and interaction between cavities via HOM propagation - Define strategy on HOM coupler design, prototyping and testing - Design HOM coupler (antenna vs. beam tube absorber), and cooling layout - Perform multipactor studies - Identify manufacture capacities - Identify required equipment for HOM coupler tests (do we need room temperature model cavity?) Identify potential contributers and deadlines
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19
Introduction to the meeting
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20
Contribution from CNRS (France)
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21
DiscussionItems for discussion: - Understand limits of scope of CEA and CNRS contributions; - Identification of integration needs: components type, interfaces, functional needs; - Identify uncovered items and possible distribution to institutes interested
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19
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Working Group 4 - Session 1 (together with WG2) AT Auditorium
AT Auditorium
CERN
Beam dynamics
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Coffee break AT Auditorium
AT Auditorium
CERN
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- 22
- 23
- 24
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Working Group 2 - Session 2 AT Auditorium
AT Auditorium
CERN
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25
Processing of cavity to obtain design performance- Define strategy to reach full performance (25 MV/m for beta = 1 cavities) for a fully equipped prototype cryomodule - Identify required equipment (e.g. electro-polishing, HPWR) and what is missingSpeaker: Sergio Calatroni (CERN)
- 26
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27
Discussion sessionPotential manufacturers and required equipment - Identify potential Labs with manufacturing competence (in house or with industry) - Identify potential commercial manufacturers - Agree on manufacturing and processing sequence - Identify required equipment (e.g. field flatness, frequency tuning) and what equipment is missing Diagnostic equipment - Define required equipment (on-line: Temperature mapping and other diagnostics methods in super-fluid helium) and what is missing - Define required equipment (off-line: Optical inspection system) and what is missing Identify potential contributers and deadlines
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25
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- 28
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29
Discussion- Type of coupler, integration needs, mechanical interface - Type of tuner, integration needs, interface to cavity helium vessel - Magnetic shielding design & integration (internal? external?) - Alignment requirements and assembly principles - cryogenics distribution architecture: general requirements and possible schemes, slope, H/W related issues (ex. Technical Service Modules) - Table of Work Packages -AOB
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30
Speaker: Mohammad Eshraqi
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31
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32
Speaker: Mats Lindroos
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33
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34
Discussion: impact of cavity performance on beam dynamics 112/R-034
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35
Discussion: H- stripping in transfer line via blackbody radiation 112/R-034
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30
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Collaboration dinner Restaurant 2 - DSR - Bldg 504
Restaurant 2 - DSR - Bldg 504
CERN
Restaurant 2 - DSR - Bldg 504
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Coffee Break AT Auditorium
AT Auditorium
CERN
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Interactions between Working Groups AT Auditorium
AT Auditorium
CERN
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- 38
- 39
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Working Group 2 - Session 3: (with WG 1 & 3) AT Auditorium
AT Auditorium
CERN
- 40
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41
High power RF coupler - CEA-Saclay experienceSpeaker: guillaume devanz
- 42
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43
On the choice of the frequency tunerSpeaker: guillaume devanz
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44
Discussion on addressed topics and on integration issues between WG1, 2 and 3Power coupler: - Define the conceptual design, the layout of cooling (including thermal loads) and diagnostical tools, choice of materials (waveguide, window) - Perform multipactor studies, assess methods of multipactor suppression and elaborate coating techniques - Acquire data on the secondary emission coefficient (SEC) of materials involved - Identify manufacture and conditioning facilities - Identify required equipment for coating and conditioning Frequency tuner - Perform by computer simulation Lorentz-force detuning studies of cavity design and confirm by measurement - Develop and test slow tuner; integrate the design into that of the cryomodule - Develop and test fast tuner; integrate the design into that of the cryomodule - Develop scenarios for failing cavities (detuning) Magnetic shielding - Design by computer simulation or analytically the magnetic shielding; manufacture it Identify potential contributers and deadlines
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Working Group 3 - Session 3: Common session with WG1 and WG2 112/R-034
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- 45
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46
Discussion on collimation for Linac4
- 47
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48
Discussion on collimation/radiation studies at the Soltan institute
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49
Discussion on task splitting between Cockroft and Soltan Institute
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50
Discussion: longitudinal momentum collimation
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Lunch - (-)
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Write-up of summary & recommendations of Working Group 2 AT Auditorium
AT Auditorium
CERN
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Write-up of summary & recommendations of Working Group 3 112/R-034
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Write-up of summary & recommendations of Working Group 4 112/2-023
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Coffee break AT Auditorium
AT Auditorium
CERN
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Plenary session 4: summaries and recommendations AT Auditorium
AT Auditorium
CERN
- 51
- 52
- 53
- 54
- 55
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WG 1: High power RF equipment (RF distribution, amplitude/phase modulators, circulators, loads…) AT Auditorium
AT Auditorium
CERN
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WG 2: Cavity design (geometric beta, high power coupler, HOM damper/coupler, tuner …) and construction (Manufacturers, processing facilities, low power RF tests …) AT Auditorium
AT Auditorium
CERN
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WG 3: Cryomodule and integration (Design, construction, assembly…) AT Auditorium
AT Auditorium
CERN
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WG 4: Beam dynamics and loss management (Collective effects, H- stripping, collimation …) AT Auditorium
AT Auditorium
CERN