LIU Beam Studies Review

Contribution List

0. Welcome and introduction

Roland Garoby (CERN)

28/08/2012, 08:30

Goals of mid-run review

1. Setting the scene

Giovanni Rumolo (CERN)

28/08/2012, 08:40

• 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…)?

2. Performance reach of LHC beams

Ana Guerrero Ollacarizqueta (CERN), Dr Bettina Mikulec (CERN)

28/08/2012, 09:00

PSB

• From the PSB with different PS schemes • Preservation of emittances along the chain: importance of transverse damper? • PSB with Linac4 in case of Linac2 failure: do we need PSB MDs?

3. Space charge studies at 160 MeV in the PSB

Alexander Molodozhentsev (High Energy Accelerator Research Organization (JP)), Christian Carli (CERN), Elena Benedetto (CERN), Frank Schmidt (CERN), Michel Martini (CERN), Vincenzo Forte

28/08/2012, 09:30

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)?

4. RF & transverse feedback aspects

Alan James Findlay (CERN), Alfred Blas (CERN), Maria Elena Angoletta (CERN), Mauro Paoluzzi (CERN)

28/08/2012, 09:50

PSB

• 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?

5. Space charge studies and impact on performance

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))

28/08/2012, 10:40

PS

• 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?

6. Longitudinal plane

Heiko Damerau (CERN), Mauro Migliorati (Universita e INFN, Roma I (IT)), Steven Hancock (CERN)

28/08/2012, 11:00

PS

• 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?

7. Transverse plane

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))

28/08/2012, 11:30

PS

• 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)

8. PS-SPS transfer studies

Heiko Damerau (CERN), Helga Timko (CERN), Steven Hancock (CERN)

28/08/2012, 12:00

PS-SPS

• How much can we gain? • With Q20? • What else do we need to know to decide upon additional RF hardware?

9. Performance and reach of Q20 optics (wrt Q26)

Eliana Gianfelice (Fermi National Accelerator Lab. (US)), Glenn Vanbavinckhove (NIKHEF (NL)), Hannes Bartosik (Physics Division), RF team, Yannis Papaphilippou (CERN)

28/08/2012, 14:00

SPS

• 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?

10. Electron cloud status @ SPS in 2012

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))

28/08/2012, 14:30

SPS

• 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?

11. Longitudinal stability in the SPS: RF studies

Elena Chapochnikova (CERN), Juan Federico Esteban Muller, Theodoros Argyropoulos (National Technical Univ. of Athens (GR)), Thomas Bohl (CERN)

28/08/2012, 15:00

SPS

• Requirements for the 800 MHz system • Known instabilities and thresholds • What else do we need to know to estimate performance after LIU?

13. High Bandwidth Feedback system

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)

28/08/2012, 16:00

SPS

• Which tests can be done before LS1? On which hardware does this depend? • Can we envisage extending it to PS/LHC?

14. Summary (collective)

28/08/2012, 16:30

• Key pending questions • Which ones can be addressed before the end of the run? • What is required (MD time, machine conditions, equipment…)?

12. Longitudinal stability in the SPS: beam quality

Elena Chapochnikova (CERN), Juan Federico Esteban Muller, Thomas Bohl (CERN)

• Known instabilities and thresholds • What else do we need to know to estimate performance after LIU?