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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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Convener: J. Uythoven
Sc. secretary: M. BlaszkiewiczConvener: Jan Uythoven (CERN)-
1
Welcome messageSpeaker: Jose Miguel Jimenez (CERN)
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2
Introduction to WorkshopSpeaker: Daniel Wollmann (CERN)
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3
Overview of beam-dust issues in accelerators: from AdA to LHCSpeaker: Rudiger Schmidt (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
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4
Overview of dust issues in space researchSpeaker: Mihaly Horanyi
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10:35
Coffee break 30/7-012 (CERN)
30/7-012
CERN
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5
Dust-charging environment in accelerators: synchrotron radiationSpeaker: Vincent Baglin (CERN)
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6
Dust-charging environment in accelerators: electron cloudsSpeaker: Konstantinos Paraschou (CERN)
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7
Discussion Session 1
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1
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12:15
Lunch break
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Session 2a: Dust in particle accelerators I (Beam-dust interactions) 30/6-019
Convener: P. Belanger
Sc. secretary: C. HernalsteensConvener: Philippe Belanger (TRIUMF (CA))-
8
Observation of sudden beam loss at SuperKEKb, and possible reasonsSpeaker: HITOMI IKEDA (High Energy Accelerator Research Organization (KEK)-Unknown-Unkn)
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9
"Fireball" measured inside the RF cavity at SuperKEKbSpeaker: Dr Tetsuo Abe (High Energy Accelerator Research Organization (KEK))
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10
Dust and beam instabilities: The "16L2" events at LHC - what we know, what we do not know 30/6-019Speaker: Lotta Mether (CERN)
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11
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15:25
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8
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Convener: X. Wang
Sc. secretary: L. FelsbergerConvener: Xu Wang-
12
Dust charging and dust-surface interaction in the laboratorySpeaker: Cecile Arnas
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13
Dust issues in nuclear fusion reactorsSpeaker: Svetlana Ratynskaia (Royal Institute of Technology (KTH), Stockholm)
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14
Theoretical and numerical characterisation of the adhesion and electrostatic charge of dustSpeaker: Jan Deca
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15
Discussion Session 3
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12
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Session 2b: Dust in particle accelerators I (Beam-dust interactions) 30/6-019
Convener: P. Belanger
Sc. secretary: C. HernalsteensConvener: Philippe Belanger (TRIUMF (CA))-
16
Overview of UFOs during LHC operation - what we know, what we do not knowSpeaker: Anton Lechner (CERN)
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17
UFO dynamics and pre-charged dust: Simulations and experimental observations at LHCSpeaker: Bjorn Hans Filip Lindstrom (CERN)
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18
Discussion Session 2
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10:20
Coffee break 30/7-012
30/7-012
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16
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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)-
19
Issues with beam-dust interaction inside the vacuum chamber at SuperKEKbSpeaker: Yusuke Suetsugu (KEK)
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20
Dust in accelerator vacuum systems: Vacuum manipulations and beam-screen treatment at LHC 30/6-019Speaker: Cedric Garion (CERN)
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21
Surface laser treatment of vacuum systems and potential dust issuesSpeaker: Marcel Himmerlich (CERN)
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19
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12:00
Lunch break
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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)-
22
Analysis and possible sources of dust grains extracted from the LHCSpeaker: Ana Teresa Perez Fontenla (CERN)
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23
Dust issues and beam losses in LHC injection kickers: What can we learn from it?Speaker: Mike Barnes (CERN)
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24
Dust issues at DESY (HERA, DORIS, PETRA) and how to avoid them at XFEL and FLASHSpeaker: Lutz Lilje
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25
Dust migration into RF cavitiesSpeaker: Aveen Mahon (McGill University, (CA))
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26
Discussion Session 4
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15:50
Coffee break 30/7-012
30/7-012
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22
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27
Visits
Visit to CERN's Large Magnet Facility
Visit to the CERN Control Centre (CCC)
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27
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Session 5: Dust charging and dust release in particle accelerators 30/6-019
Convener: M. Horanyi
Sc. secretary: C. ObermairConvener: Mihaly Horanyi-
28
Dust charging mechanisms in acceleratorsSpeaker: Philippe Belanger (TRIUMF (CA))
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29
Dust charging lofting experiments at LASP, University of ColoradoSpeaker: Xu Wang
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30
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10:10
Coffee break 30/7-012
30/7-012
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28
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Convener: D. Wollmann
Sc. secretary: C. ObermairConvener: Daniel Wollmann (CERN)-
31
Wrap-up and questions for the discussionSpeaker: Christoph Wiesner (CERN)
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32
Discussion: Most relevant aspects to be understood and studied? Next steps?
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31
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12:30
Lunch break
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Collaboration Meetings
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