Choose timezone
Your profile timezone:
LIU Beam Studies Review
→
Europe/Zurich
6/2-024 - BE Auditorium Meyrin (CERN)
Giovanni Rumolo
(CERN)
Description
The main goal is to review the status of beam studies in the injectors and to define work priorities before LS1 in view of being able to:
- specify the equipment to be built for LIU,
- estimate achievable beam characteristics in the successive accelerators.
Chairman
Giovanni Rumolo
Scientific secretaries:
PSB: Vivien Raginel
PS: Alexander Huschauer and Sandra Aumon
SPS: Wolfgang Bartmann and Helga Timko
External reviewers: Giuliano Franchetti (GSI), Dobrin Kaltchev (TRIUMF) and Alexey Burov (FNAL, currently at CERN)
Instructions for the speakers: The 20' talks are meant to be 15' (talk) + 5' (questions + discussion) and the 30' talks are meant to be 20' (talk) + 10' (questions + discussion).
Outcome: a summary report with a list of key items for study will be prepared by Giovanni Rumolo with the input of the scientific secretaries and the report from the external referees.
The organizers are pleased to invite you to the workshop lunch in Restaurant no.1 from 12.30 to 14.00. Please fill in the registration form to confirm your participation.
Participants
-
-
1
Welcome and introduction 6/2-024 - BE Auditorium MeyrinGoals of mid-run reviewSpeaker: Roland Garoby (CERN)
-
2
Setting the scene 6/2-024 - BE Auditorium Meyrin• LHC expectations and injectors’ potential performance after LIU • LIU MD activities: initial goals, where we are standing, which additional MDs do we need? Which additional hardware would help (instrumentation, RF, damper…)?Speaker: Giovanni Rumolo (CERN)
-
Convener: Vivien Raginel (CERN)
- 3
-
4
Space charge studies at 160 MeV in the PSB• Which brightness can we expect? • Impact of painting scheme? • Spotted resonances that need compensating? Which tools do we need to optimize the compensation (instrumentation, multipoles)?Speakers: Alexander Molodozhentsev (High Energy Accelerator Research Organization (JP)), Christian Carli (CERN), Elena Benedetto (CERN), Frank Schmidt (CERN), Michel Martini (CERN), Vincenzo Forte
-
5
RF & transverse feedback aspects• What else do we need to know to definitively adopt Finemet cavities? When the decision can be made? • What is left to demonstrate with the digital LLRF (e.g. synchronization before transfer, different intensity ranges, test more than one ring)? • Are RF by-passes an issue? • Can some of the new hardware for the transverse damper tested this year?Speakers: Alan James Findlay (CERN), Alfred Blas (CERN), Maria Elena Angoletta (CERN), Mauro Paoluzzi (CERN)
-
10:10
Coffee break 6/2-024 - BE Auditorium Meyrin
-
Conveners: Alexander Huschauer (CERN), Sandra Aumon (Ecole Polytechnique Federale de Lausanne (CH))
-
6
Space charge studies and impact on performance• Is a higher brightness/Q achievable at 1.4 GeV? Perspective at 2 GeV? • Are the tunes enough optimized? Potential of further progress? Need for resonances compensation? • Importance of transverse damper?Speakers: Alexander Huschauer (Vienna University of Technology (AT)), Frank Schmidt (CERN), Giuliano Franchetti (Gesellschaft fuer Schwerionenforschung mbH (GSI)), Raymond Wasef (Institut National Polytechnique de Grenoble (FR))
-
7
Longitudinal plane• Stability & feedback: what else do we need to know to specify hardware (damper, cavities feedbacks…)? • Impedance measurements: Impact of future additional devices (kickers, cavities, damper…)? Are RF by-passes an issue? • Alternative production schemes • Can we set scenarios to reasonably estimate performance after LS1?Speakers: Heiko Damerau (CERN), Mauro Migliorati (Universita e INFN, Roma I (IT)), Steven Hancock (CERN)
-
8
Transverse plane• Stability & feedback: what else do we need to know to specify hardware (damper, kickers, correctors, e-cloud mitigation…)? • Sources of losses, emittance growth and instability • Impedance measurements (global and local)Speakers: Alfred Blas (CERN), Giovanni Iadarola (Universita e INFN (IT)), Giovanni Rumolo (CERN), Guido Sterbini (CERN), Dr Mauro Pivi (SLAC), Nicolo Biancacci (Universita e INFN, Roma I (IT)), Sandra Aumon (Ecole Polytechnique Federale de Lausanne (CH)), Serena Persichelli (Universita e INFN, Roma I (IT)), Dr Simone Gilardoni (CERN), Vladimir Kornilov (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
-
6
-
Conveners: Alexander Huschauer (Vienna University of Technology (AT)), Wolfgang Bartmann (CERN)
- 9
-
12:20
Lunch @Restaurant 1 Glassbox
Glassbox
-
Conveners: Helga Timko (CERN), Wolfgang Bartmann (CERN)
-
10
Performance and reach of Q20 optics (wrt Q26)• Single bunch (space charge and TMCI) & Multi-bunch operation: are the tunes enough optimized? Potential of further progress? Do we understand the present limits? Would it help to test with a better LLRF at 800 MHz? • Deployment of extraction to LHC: what is left to understand?Speakers: Eliana Gianfelice (Fermi National Accelerator Lab. (US)), Glenn Vanbavinckhove (NIKHEF (NL)), Hannes Bartosik (Physics Division), RF team, Yannis Papaphilippou (CERN)
-
11
Electron cloud status @ SPS in 2012• Observations (beam, pressure) • ECM studies for scrubbing and modeling: what is left to understand? • Progress on a-C coating: what is left to demonstrate? What are the questions?Speakers: Fritz Caspers (CERN), Giovanni Iadarola (Universita e INFN (IT)), Giovanni Rumolo (CERN), Hannes Bartosik (Physics Division), Holger Neupert (CERN), Mauro Taborelli (CERN), Michael Rolf Holz (Hochschule Karlsruhe, Technik und Wirtschaft), Silke Federmann (University of Vienna (AT))
-
12
Longitudinal stability in the SPS: RF studies• Requirements for the 800 MHz system • Known instabilities and thresholds • What else do we need to know to estimate performance after LIU?Speakers: Elena Chapochnikova (CERN), Juan Federico Esteban Muller, Theodoros Argyropoulos (National Technical Univ. of Athens (GR)), Thomas Bohl (CERN)
-
10
-
15:30
Coffee break 6/2-024 - BE Auditorium Meyrin
-
Conveners: Helga Timko (CERN), Wolfgang Bartmann (CERN)
-
13
High Bandwidth Feedback system• Which tests can be done before LS1? On which hardware does this depend? • Can we envisage extending it to PS/LHC?Speakers: John D Fox (SLAC National Accelerator Laboratory (US)), John Michael Cesaratto (SLAC National Accelerator Laboratory (US)), Kevin Shing Bruce Li (Eidgenoessische Tech. Hochschule Zuerich (CH)), Wolfgang Hofle (CERN)
-
13
-
14
Summary (collective) 6/2-024 - BE Auditorium Meyrin• Key pending questions • Which ones can be addressed before the end of the run? • What is required (MD time, machine conditions, equipment…)?
-
1
