1st SPL Collaboration Meeting

11 Dec 2008, 09:00 → 12 Dec 2008, 22:05 Europe/Zurich

AT Auditorium (CERN)

Roland Garoby (CERN)

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.

Minutes Minutes_SPL_Collaboration_200209.doc Minutes_SPL_Collaboration_200209.pdf

Thursday 11 December

09:00 → 10:00 Plenary session 1: introduction

09:00 Welcome

Speaker: Lyn Evans

09:10 SPL study and meeting goals

Speaker: Roland garoby

Slides SPL_study_and_meeting_goals_Garoby.pdf SPL_study_and_meeting_goals_Garoby.ppt

09:30 SPL specifications and design choices

Speaker: Frank Gerigk

Slides FGerigk-SPLparameters.pdf.pdf

10:00 → 10:20 Coffee break

10:20 → 12:30 Plenary session 2: planned contributions to the SPL

10:20 CEA (Saclay) plans

Speaker: Stephane Chel (Centre d'Etudes de Saclay (CEA-Saclay))

Slides CEA_Chel.pdf CEA_Chel.ppt

10:40 IN2P3 (Orsay) plans

Speaker: Patxi Duthil (IPNO - IN2P3 - CNRS)

Slides IN2P3_Duthill.pdf IN2P3_Duthill.ppt

11:00 TRIUMF plans

Speakers: Rick Baartman, Robert Laxdal

Slides TRIUMF-SPL.pdf TRIUMF-SPL.ppt

11:20 Cockcroft Institute plans

Speaker: Amos Dexter

Slides Cockcroft_Dec_2008_Dexter.pdf Cockcroft_Dec_2008_Dexter.ppt

11:40 Stony Brook / BNL plans

Speakers: Ilan Ben-Zvi, Rama Buchi Rao Calaga

Slides BNL_SPL_Workshop.pdf

12:00 Explanation/Discussion on the mandates of the working groups

Speaker: Roland garoby

Slides Expectations_Garoby.pdf Expectations_Garoby.ppt

12:30 → 14:00 Lunch

14:00 → 15:45 Working Group 1 - Session 1

4 rooms are available for the 4 workings groups:
- AT auditorium
- 30-2-005
- 112-R-028
- 112-R-034

14:00 RF Power Distribution for SPL - Introduction

Speaker: Edmond Ciapala (CERN)

Slides Introduction.pdf Introduction.pptx

14:15 RF Power Distribution = System Layout and Components

Speaker: DANIEL VALUCH (CERN)

Slides SPL_waveguide_distribution_systems.pdf SPL_waveguide_distribution_systems.pptx

14:45 Cockroft Instutute - HP RF Expertise and Areas of Interest

Speaker: Amos Dexter

14:00 → 15:45 Working Group 2 - Session 1 (with WG 4)

14:00 On the optimum choice of the geometric beta of the sc cavities

Make recommendation on geometrical beta based on beam dynamics issues, in view of the impact on power dissipation, max. gradient, and required equipment (high pressure water rinsing, electropolishing, ...)

Speaker: Frank Gerigk

Slides FGerigk-SPL-cavity-beta.pdf

14:15 Discussion on cavity beta and other design issues

Other 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

14:30 Do we need HOM dampers on SC cavities in p linacs?

Speaker: Joachim Tuckmantel (CERN)

Slides WhyHOMDamp.pdf WhyHOMDamp.ppt

14:50 HOM studies for TESLA

Speaker: Hans-Walter Glock

Slides HOM_TESLA_Glock.pdf HOM_TESLA_Glock.ppt

15:10 HOM damping on sc cavities

Speaker: Joachim Tuckmantel

Slides HOMDamp.pdf HOMDamp.ppt

15:30 Discussion HOM coupler

Possible 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

14:00 → 15:45 Working Group 3 - Session 1

agenda SPL_collab_meeting_cryomodules_Dec_2008.doc SPL_collab_meeting_cryomodules_Dec_2008.pdf

14:00 Introduction to the meeting

Slides

• SPL_cryomodule.pdf
• SPL_cryomodule.ppt
• Table_of_cryomodule_work_packages.doc
• Table_of_cryomodule_work_packages.pdf

14:15 Contribution from CNRS (France)

14:35 Discussion

Items 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

14:00 → 15:45 Working Group 4 - Session 1 (together with WG2)

Beam dynamics

15:45 → 16:00 Coffee break

16:00 → 18:10 Working Group 1 - Session 2

16:00 Klystron Modulators for the LP-SPL and for the HP-SPL

Speaker: Carlos De Almeida Martins (CERN)

Slides SolidStateKlystronModulators_1SPLColMet.pdf SolidStateKlystronModulators_1SPLColMet.ppt

16:40 Review of Specifications and Technical Choices - Part 1

Speaker: Edmond Ciapala (CERN)

Slides Specifications.pdf Specifications.pptx

17:20 Review of System Specifications and tecnical choices Pt 2

Slides Specifications.pdf Specifications.pptx

16:00 → 17:30 Working Group 2 - Session 2

16:00 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 missing

Speaker: Sergio Calatroni (CERN)

Slides

• slides
• SPL_Collaboration_Meeting_-_WG2_Task_3_cavity_processing.pdf
• SPL_Collaboration_Meeting_-_WG2_Task_3_cavity_processing.pptx

16:20 RF test of individual cavities

Identify need of re-processing and re-testing, the equipment required and what is missing

Speaker: Pierre Maesen (CERN)

Slides SPLCollaboration_meeting_PM1_revWW.pdf SPLCollaboration_meeting_PM1_revWW.pptx

16:40 Discussion session

Potential 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

16:00 → 17:30 Working Group 3 - Session 2

16:00 Possible quadrupole solutions (D.Tommasini, CERN)

Slides SPL.pdf SPL.pptx

16:20 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

16:00 → 17:30 Working group 4 - Session 2

16:00 Beam dynamics in the SPL

Speaker: Mohammad Eshraqi

Slides Beam_Dynamics_in_the_SPL_--_M._Eshraqi_--_Thursday_11_Dec_--_SPL_collaboration_meeting.pdf Beam_Dynamics_in_the_SPL_--_M._Eshraqi_--_Thursday_11_Dec_--_SPL_collaboration_meeting.ppt

16:15 Discussion on beam dynamics in the SPL

16:30 H- beam splitting for EURISOL targets

Speaker: Mats Lindroos

Slides Beam_splitting_for_SPL.pdf

16:45 Discussion on H- beam splitting for EURISOL

17:00 Discussion: impact of cavity performance on beam dynamics

17:15 Discussion: H- stripping in transfer line via blackbody radiation

19:00 → 21:30 Collaboration dinner

Friday 12 December

08:30 → 09:30 Plenary session 3: discussion

08:30 Organisation of the collaboration (with discussion)

Speaker: Roland garoby

Slides Organization_Garoby.pdf Organization_Garoby.ppt

09:00 Preliminary feedback from the Working Groups

09:30 → 09:50 Coffee Break

09:50 → 11:00 Interactions between Working Groups

11:00 → 12:30 Working Group 1 - Session 3

11:00 Definition of Future Work and Workpackages

Speaker: Edmond Ciapala (CERN)

Slides Workpackages.pdf Workpackages.pptx

11:20 PreliminaryWG1

Speaker: Edmond Ciapala (CERN)

Slides WG1_Preliminary.pdf WG1_Preliminary.ppt

11:00 → 12:30 Working Group 2 - Session 3: (with WG 1 & 3)

11:00 Assembly and test of fully equipped cryomodule

- Identify required equipment, monitoring devices and what is missing - Address issue whether we need to simulate the slope of the tunnel

Speaker: Pierre Maesen (CERN)

Slides SPLCollaboration_meeting_PM2_revWW.pdf SPLCollaboration_meeting_PM2_revWW.pptx

11:15 High power RF coupler - CEA-Saclay experience

Speaker: guillaume devanz

Slides

• coupler-rev.pdf
• coupler-rev.ppt
• SPL_meeting02_coupler.pdf
• SPL_meeting02_coupler.ppt

11:30 High power RF coupler - CERN experience

Speaker: Eric Montesinos (CERN)

Slides SPL_coupler_design_v06.pdf SPL_coupler_design_v06.pptx

11:45 On the choice of the frequency tuner

Speaker: guillaume devanz

Slides

• 1.3GHz_tuners.pdf
• 1.3GHz_tuners.ppt
• tuner-parameters.pdf
• tuner-parameters.ppt

12:00 Discussion on addressed topics and on integration issues between WG1, 2 and 3

Power 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

11:00 → 12:30 Working Group 3 - Session 3: Common session with WG1 and WG2

11:00 → 12:30 Working Group 4 - Session 3

11:00 Collimation for Linac4

Speaker: Juan FERNANDEZ-HERNANDO (STFC)

Slides FernandezSPLcollaborationmeeting.pdf FernandezSPLcollaborationmeeting.ppt

11:15 Discussion on collimation for Linac4

11:30 Collimation and radiation protection, experience at the Soltan Institute

Speaker: Slawomir Wronka (Soltan Institute)

Slides IPJ_SPL.pdf IPJ_SPL.pptx

11:45 Discussion on collimation/radiation studies at the Soltan institute

12:00 Discussion on task splitting between Cockroft and Soltan Institute

12:15 Discussion: longitudinal momentum collimation

12:30 → 14:00 Lunch

14:00 → 15:45 Write-up of summary & recommendations of Working Group 1

14:00 → 15:45 Write-up of summary & recommendations of Working Group 2

14:00 → 15:45 Write-up of summary & recommendations of Working Group 3

14:00 → 15:45 Write-up of summary & recommendations of Working Group 4

15:45 → 16:00 Coffee break

16:00 → 18:00 Plenary session 4: summaries and recommendations

16:00 Summary & recommendations - Working Group 1

Speakers: Amos Dexter, Edmond Ciapala (CERN)

Slides WG1_Summary.pdf WG1_Summary.ppt

16:20 Summary & recommendations - Working Group 2

Speakers: Stephane Chel (Centre d'Etudes de Saclay (CEA-Saclay)), Wolfgang Weingarten (CERN)

Slides WG2_Summary.docx WG2_Summary.pdf

16:40 Summary & recommendations - Working Group 3

Speakers: Patxi DUTHIL (IPNO - IN2P3 - CNRS), Vittorio Parma (CERN)

Slides Conclusions_WP3.pdf Conclusions_WP3.ppt

17:00 Summary & recommendations - Working Group 4

Speakers: Frank Gerigk, Rick Baartman

Slides SummaryWG4.pdf

17:20 Summary on organisation and planning of the collaboration

Speaker: Roland garoby

Slides Summary_Organization_and_Meeting.pdf Summary_Organization_and_Meeting.ppt

21:30 → 21:45 WG 1: High power RF equipment (RF distribution, amplitude/phase modulators, circulators, loads…)

21:30 → 21:45 WG 2: Cavity design (geometric beta, high power coupler, HOM damper/coupler, tuner …) and construction (Manufacturers, processing facilities, low power RF tests …)

21:30 → 21:45 WG 3: Cryomodule and integration (Design, construction, assembly…)

21:30 → 21:45 WG 4: Beam dynamics and loss management (Collective effects, H- stripping, collimation …)