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Workshop on Dust Charging and Beam-Dust Interaction in Particle Accelerators
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Europe/Zurich
30/6-019 (CERN)
Christoph Wiesner
(CERN),
Daniel Wollmann
(CERN)
Description
Workshop Objectives
- Improve understanding of beam-dust interactions in particle accelerators, in particular, of dust-charging and release mechanisms.
- Improve understanding of evolution of beam-dust interaction rate as a function of beam and other parameters.
- Present modelling work on beam-dust interactions and their consequences.
- Present research on dust issues in space applications.
- Improve understanding of the behaviour of dust particles in accelerator hardware systems (Vacuum, RF, treated surfacesโฆ) and their consequences.
- Improve understanding of mechanisms of dust migration into sensitive devices, such as high field gradient superconducting cavities, and ways to prevent this migration.
- Identify synergies between particle-accelerator and space-research communities.
- Define next research steps and possible collaborations.
Participation is by invitation only.
Support
Participants
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09:00
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12:15
Convener: J. Uythoven
Sc. secretary: M. BlaszkiewiczConvener: Jan Uythoven (CERN)-
09:00
Welcome message 20mSpeaker: Jose Miguel Jimenez (CERN)
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09:20
Introduction to Workshop 15mSpeaker: Daniel Wollmann (CERN)
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09:35
Overview of beam-dust issues in accelerators: from AdA to LHC 30mSpeaker: Rudiger Schmidt (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
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10:05
Overview of dust issues in space research 30mSpeaker: Mihaly Horanyi
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10:35
Coffee break 20m 30/7-012 (CERN)
30/7-012
CERN
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10:55
Dust-charging environment in accelerators: synchrotron radiation 30mSpeaker: Vincent Baglin (CERN)
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11:25
Dust-charging environment in accelerators: electron clouds 30mSpeaker: Konstantinos Paraschou (CERN)
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11:55
Discussion Session 1 20m
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09:00
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12:15
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13:45
Lunch break 1h 30m
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13:45
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15:45
Session 2a: Dust in particle accelerators I (Beam-dust interactions) 30/6-019
Convener: P. Belanger
Sc. secretary: C. HernalsteensConvener: Philippe Belanger (TRIUMF (CA))-
13:45
Observation of sudden beam loss at SuperKEKb, and possible reasons 30mSpeaker: HITOMI IKEDA (High Energy Accelerator Research Organization (KEK)-Unknown-Unkn)
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14:15
"Fireball" measured inside the RF cavity at SuperKEKb 30mSpeaker: Dr Tetsuo Abe (High Energy Accelerator Research Organization (KEK))
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14:45
Dust and beam instabilities: The "16L2" events at LHC - what we know, what we do not know 30m 30/6-019Speaker: Lotta Mether (CERN)
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15:15
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15:25
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13:45
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15:45
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17:35
Convener: X. Wang
Sc. secretary: L. FelsbergerConvener: Xu Wang-
15:45
Dust charging and dust-surface interaction in the laboratory 30mSpeaker: Cecile Arnas
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16:15
Dust issues in nuclear fusion reactors 30mSpeaker: Svetlana Ratynskaia (Royal Institute of Technology (KTH), Stockholm)
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16:45
Theoretical and numerical characterisation of the adhesion and electrostatic charge of dust 30mSpeaker: Jan Deca
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17:15
Discussion Session 3 20m
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15:45
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09:00
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12:15
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09:00
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10:40
Session 2b: Dust in particle accelerators I (Beam-dust interactions) 30/6-019
Convener: P. Belanger
Sc. secretary: C. HernalsteensConvener: Philippe Belanger (TRIUMF (CA))-
09:00
Overview of UFOs during LHC operation - what we know, what we do not know 30mSpeaker: Anton Lechner (CERN)
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09:30
UFO dynamics and pre-charged dust: Simulations and experimental observations at LHC 30mSpeaker: Bjorn Hans Filip Lindstrom (CERN)
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10:00
Discussion Session 2 20m
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10:20
Coffee break 20m 30/7-012
30/7-012
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09:00
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10:40
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12:00
Session 4: Dust in particle accelerators II (Vacuum, surfaces and RF) 30/6-019
Convener: G. Rosaz
Sc. secretary: J. HeronConvener: Guillaume Jonathan Rosaz (CERN)-
10:40
Issues with beam-dust interaction inside the vacuum chamber at SuperKEKb 30mSpeaker: Yusuke Suetsugu (KEK)
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11:10
Dust in accelerator vacuum systems: Vacuum manipulations and beam-screen treatment at LHC 25m 30/6-019Speaker: Cedric Garion (CERN)
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11:35
Surface laser treatment of vacuum systems and potential dust issues 25mSpeaker: Marcel Himmerlich (CERN)
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10:40
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12:00
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13:30
Lunch break 1h 30m
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13:30
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16:10
Session 4: Dust in particle accelerators II (Vacuum, surfaces and RF) 30/6-019
Convener: G. Rosaz
Sc. secretary: J. HeronConvener: Guillaume Jonathan Rosaz (CERN)-
13:30
Analysis and possible sources of dust grains extracted from the LHC 30mSpeaker: Ana Teresa Perez Fontenla (CERN)
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14:00
Dust issues and beam losses in LHC injection kickers: What can we learn from it? 30mSpeaker: Mike Barnes (CERN)
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14:30
Dust issues at DESY (HERA, DORIS, PETRA) and how to avoid them at XFEL and FLASH 30mSpeaker: Lutz Lilje
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15:00
Dust migration into RF cavities 30mSpeaker: Aveen Mahon (McGill University, (CA))
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15:30
Discussion Session 4 20m
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15:50
Coffee break 20m 30/7-012
30/7-012
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13:30
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16:10
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17:30
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16:10
Visits 1h 20m
Visit to CERN's Large Magnet Facility
Visit to the CERN Control Centre (CCC)
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16:10
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09:00
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10:40
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09:00
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10:30
Session 5: Dust charging and dust release in particle accelerators 30/6-019
Convener: M. Horanyi
Sc. secretary: C. ObermairConvener: Mihaly Horanyi-
09:00
Dust charging mechanisms in accelerators 30mSpeaker: Philippe Belanger (TRIUMF (CA))
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09:30
Dust charging lofting experiments at LASP, University of Colorado 30mSpeaker: Xu Wang
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10:00
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10:10
Coffee break 20m 30/7-012
30/7-012
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09:00
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10:30
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12:30
Convener: D. Wollmann
Sc. secretary: C. ObermairConvener: Daniel Wollmann (CERN)-
10:30
Wrap-up and questions for the discussion 30mSpeaker: Christoph Wiesner (CERN)
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11:00
Discussion: Most relevant aspects to be understood and studied? Next steps? 1h 30m
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10:30
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12:30
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14:00
Lunch break 1h 30m
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14:00
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17:00
Collaboration Meetings
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09:00
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10:30
