ICFA mini-WORKSHOP ON IMPEDANCES AND BEAM INSTABILITIES IN PARTICLE ACCELERATORS

from Monday, 18 September 2017 (18:00) to Friday, 22 September 2017 (20:40)
Benevento (San Vittorino Hall)

        : Sessions
    /     : Talks
        : Breaks
18 Sep 2017
19 Sep 2017
20 Sep 2017
21 Sep 2017
22 Sep 2017
AM
09:00
Session 1- Introductory talks (Chair: Giovanni Rumolo) -Dr Giovanni Rumolo (CERN) (until 12:30) (San Vittorino Hall)
09:00 Welcome and general introduction - Stefania Petracca (SA)   (San Vittorino Hall)
Slides
09:30 Impedance theory and modeling - Dr Elias Metral (CERN)   (San Vittorino Hall)
Slides
10:00 Impedance measurement techniques - Dr Uwe Niedermayer (TU-Darmstadt)   (San Vittorino Hall)
Slides
10:30 --- Coffee break ---
11:00 Electron cloud effects - Mr Giovanni Iadarola (CERN - Università di Napoli Federico II)   (San Vittorino Hall)
Slides
11:30 Instability theory and modeling - Prof. Oliver Boine-Frankenheim (Technische Universität Darmstadt)   (San Vittorino Hall)
Slides
12:00 Instability observations and cures - Dr Elena Shaposhnikova (CERN)   (San Vittorino Hall)
Slides
09:00
Session 3: Impedance modeling, measurements and control (Chair: Maria Rosaria Masullo. Scientific secretary: Andrea Passarelli) - Maria Rosaria Masullo (NA) (until 12:30) (San Vittorino Hall)
09:00 Challenges and pitfalls for impedance measurements in the lab - Andrea Mostacci (ROMA1)   (San Vittorino Hall)
Slides
09:20 2D and 3D collimator impedance modelling and experimental measurements - Dr Nicolo Biancacci (CERN)   (San Vittorino Hall)
Slides
09:40 Continuous-Wave HOM Load Power Computations Based on Single-Bunch Wake Simulations - Hans-Walter Glock (FG-ISRF)   (San Vittorino Hall)
Slides
10:00 Needs and solutions for machine impedance reduction - Dr Christine Vollinger (CERN)   (San Vittorino Hall)
Slides
10:20 --- Coffee break ---
10:50 Beam measurements of frequency characteristics of (longitudinal) impedance - Dr Alexandre Lasheen (CERN)   (San Vittorino Hall)
Slides
11:10 Beam-based impedance measurement techniques in light sources - Dr Ryutaro Nagaoka (Soleil)   (San Vittorino Hall)
Slides
11:30 Comparison of machine impedance calculation with beam based measurements - Karl Bane (SLAC)   (San Vittorino Hall)
Slides
11:50 Precise impedance determination from simultaneously measured tunes of unequal charge bunches - Dr Boris Podobedov (Brookhaven National Laboratory)   (San Vittorino Hall)
Slides
12:10 An improved method to measure beam impedance with rotating wire. Theoretical and simulation results - Mr Olav Berrig (CERN)   (San Vittorino Hall)
Slides
09:00
Session: 4: Instability theory and modeling (Chair: Ingo Hofmann. Scientific secretary: Adrian Oeftiger) -Prof. Ingo Hofmann (GSI Darmstadt) (until 12:10) (San Vittorino Hall)
09:00 Role of space charge in coherent instabilities - Dr Mike Blaskiewicz (BNL)   (San Vittorino Hall)
Slides
09:20 Chromaticity effects on head-tail instabilities for broad-band impedance using two particle model, Vlasov analysis, and simulations - Dr Yong Ho Chin (KEK)   (San Vittorino Hall)
Slides
09:40 TMCI at strong space charge - Dr Timofey Zolkin (Fermi National Accelerator Laboratory)   (San Vittorino Hall)
Slides
10:00 Microbunching instability - Dr Daniel Ratner (SLAC)   (San Vittorino Hall)
Slides
10:20 --- Coffee break ---
10:50 Circulant matrix formalism, benchmarks and beam-beam effect in coherent instabilities - Dr Xavier Buffat (CERN)   (San Vittorino Hall)
Slides
11:10 How e-cloud in dipoles and quadrupoles can be source of transverse instabilities - Ms Annalisa Romano (CERN)   (San Vittorino Hall)
Slides
11:30 Modeling of fast beam ion instabilities - Lotta Mether (EPFL)   (San Vittorino Hall)
Slides
11:50 Longitudinal and transverse ions cloud dynamics in an electron ring in presence of electromagnetic fields and gaps - Mr Alexis Gamelin (Laboratoire de l’Accélérateur Linéaire (LAL))   (San Vittorino Hall)
Slides
09:00
Session 6 -Instability modeling, observations and cures (Chair: Mikhail Zobov, Scientific secretary: Andrea Passarelli) - Mikhail Zobov (LNF) (until 10:20) (San Vittorino Hall)
09:00 Damping of transverse instabilities - Dr Vladimir Kornilov (GSI Helmholtzzentrum)   (San Vittorino Hall)
Slides
09:20 Concept and simulations of unconventional damping devices: wideband damper and RFQ - Dr Kevin Li (CERN)   (San Vittorino Hall)
Slides
09:40 A study of longitudinal effects on transverse Landau damping - Prof. Ingo Hofmann (GSI Darmstadt)   (San Vittorino Hall)
Slides
10:00 Beam Transfer Function (BTF) measurements and transverse stability in presence of beam-beam - Ms Claudia Tambasco (EPFL, Lausanne, Switzerland)   (San Vittorino Hall)
Slides
10:20 --- Coffee break ---
10:50
SPECIAL SESSION: Overview on different types of machines (Chair: Chris Prior, Scientific Secretary: Adrian Oeftiger) -Dr Christopher Prior (STFC/RAL/ISIS) (until 12:10) (San Vittorino Hall)
10:50 Impedance and instabilities in lepton colliders - Mauro Migliorati (ROMA1)   (San Vittorino Hall)
Slides
11:10 Impedance and instabilities in hadron machines - Benoit Salvant (CERN)   (San Vittorino Hall)
Slides
11:30 Impedance modeling in low emittance rings - Dr Alexei Blednykh (BNL)   (San Vittorino Hall)
Slides
11:50 Instabilities in hadron colliders and role of the transverse damper - Dr Alexey Burov (Fermilab)   (San Vittorino Hall)
Slides
PM
18:00 --- Registration and Welcome Cocktail ---
18:00 --- Visit of the Hortus Conclusus ---
12:30 --- LUNCH Break ---
14:30
Session 2 - Impedance theory and modeling (Chair: Ursula Van Rienen. Scientific secretary: Mario Beck) (until 18:10) (San Vittorino Hall)
14:30 Wakefields/impedances for a bunch moving between two corrugated plates - Karl Bane (SLAC)   (San Vittorino Hall)
Slides
14:50 Calculation of wakefields for plasma-wakefield accelerators - Dr Gennady Stupakov (SLAC)   (San Vittorino Hall)
Slides
15:10 Advanced method of wakefield calculations (numerical methods, parallel computing) - Dr Erion Gjonaj (TU-Darmstadt)   (San Vittorino Hall)
Slides
15:30 Analytical impedance models for very short bunches - Igor Zagorodnov (DESY)   (San Vittorino Hall)
Slides
15:50 --- Coffee break ---
16:20 Multi-physics simulations of impedance effects in accelerators - Dr Carlo Zannini (ADAM)   (San Vittorino Hall)
Slides
16:40 Impedance Issues in the Design, Measurements, and Beam Commissioning of a Narrow Gap Stripline Kicker For On-Axis Injection - Dr Stefano De Santis (LBNL)   (San Vittorino Hall)
Slides
17:00 Eigenmode Computations for Chains of Cavities - Thomas Flisgen (Helmholtz Zentrum Berlin)   (San Vittorino Hall)
Slides
17:20 The concept of coupling impedance in the self-consistent plasma wake field excitation - Prof. Renato Fedele (Scuola Politecnica e delle Scienze di Base, Dipartimento di Fisica, Università di Napoli Federico II and INFN Sezione di Napoli, Napoli, Italy)   (San Vittorino Hall)
Slides
17:40 "The Birth and the Childhood of the Coupling Impedance and the Stability Maps" Special seminar to celebrate the 50 years of the beam coupling impedance concept - Vittorio Giorgio Vaccaro (NA)   (San Vittorino Hall)
Slides
20:00 --- Welcome Dinner ---
12:30 --- Finger-food lunch at San Vittorino Hall ---
14:00
Transport to Pompei by bus and visit of Pompei archaeological site (until 19:30) ()
20:00 --- Social Dinner ---
22:30 --- Return to Benevento ---
12:10 --- Lunch Break ---
14:00
Session 5: Instability modeling, observations and cures (Chair: Mikhail Zobov. Scientific secretary: Eleonora Belli - Mikhail Zobov (LNF) (until 17:10) (San Vittorino Hall)
14:00 Mitigation of collective effects by optics optimization and the SPS experience - Mr Hannes Bartosik (CERN)   (San Vittorino Hall)
Slides
14:20 Simulation of longitudinal intensity effects with LLRF system (BLonD) - Dr Helga Timko (CERN)   (San Vittorino Hall)
Slides
14:40 Observation and active damping of longitudinal coupled bunch instabilities - Heiko Damerau (CERN)   (San Vittorino Hall)
Slides
15:00 Challenges in impedance and instabilities computation for new generation light sources - Serena Persichelli   (San Vittorino Hall)
Slides
15:20 --- Coffee Break ---
15:50 Vlasov solvers and macroparticle simulations - Dr Nicolas Mounet (EPFL)   (San Vittorino Hall)
Slides
16:10 Codes benchmarking for the single-bunch instabilities in electron storage rings - Dr Haisheng Xu (Institute of High Energy Physics of Chinese Academy of Scineces)   (San Vittorino Hall)
Slides
16:30 Transverse feedback systems for multi-bunch beam diagnostics and instabilities suppression - Alessandro Drago (LNF)   (San Vittorino Hall)
Slides
16:50 Wide-band feedback systems to diagnose and suppress intra-bunch motion in accelerators - John Fox   (San Vittorino Hall)
Slides
18:00
POSTER session (until 19:30) (Santa Sofia Cloister)
18:00 Preliminary results from validation measurements of the longitudinal power deposition model for the LHC injection kicker magnet - Mr Vasileios Vlachodimitropoulos (CERN)   (Santa Sofia Cloister)
19:30 --- Piano Concert ---
21:00 --- Dinner ---
12:10
Farewell lunch at San Vittorino complex (until 13:30) (San Vittorino Hall)
13:30
Session 7: Conclusions (Chair: Stefania Petracca) - Stefania Petracca (SA) (until 15:00) (San Vittorino Hall)
13:30 Closing remarks of Session 2: Impedance theory and modeling - Ursula Van Rienen (uni Rostock)   (San Vittorino Hall)
Slides
13:45 Closing remarks of Session 3: Impedance measurements and control - Maria Rosaria Masullo (NA)   (San Vittorino Hall)
Slides
14:00 Closing remarks of Session 4: Instability theory and modeling - Prof. Ingo Hofmann (GSI Darmstadt)   (San Vittorino Hall)
Slides
14:15 Closing remarks of Session 5: Instability modeling, observations and cures - Mikhail Zobov (LNF)   (San Vittorino Hall)
Slides
14:30 Closing remarks, acknowledgements and goodbye - Dr Giovanni Rumolo (CERN)   (San Vittorino Hall)
Slides
15:30 --- Transfer to Naples airport (15:30) ---
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