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ICFA mini Workshop on Impendances and Beam Instabilities in Particle Acceleratos
lunedì 18 settembre 2017 - venerdì, 22 settembre 2017
Complesso Universitario San Vittorino
Dipartimento di Ingegneria
Università del Sannio di Benevento
via Tenente Pellegrini
82100 Benevento
MONDAY 18 SEPTEMBER 2017

16:00 - 21:00 Transfer from Naples airport to Benevento (shuttles at 16:00 and 19:30)
Palazzo S. Domenica (piazza Guerrazzi)

18:00 - 22 Registration opens/ Welcome cocktail with visit of the Hortus Conclusus

TUESDAY 19 SEPTEMBER 2017

08:30 - 09:00 Registration

San Vittorino Hall

09:00 - 10:30 SESSION 1- Introductory talks
Chair 1: Giovanni RUMOLO

09:00 - 09:30 Stefania PETRACCA: Welcome and general introduction
09:30 - 10:00 Elias MÉTRAL: Impendance theory and modeling
10:00 - 10:30 Uwe NIEDERMAYER: Impendance measurement techniques

Coffee/Tea break

SESSION 1: Introductory talks
Chair: Giovanni RUMOLO

11:00 - 11:30 Giovanni IADAROLA: Electron cloud effects
11:30 - 12:00 Oliver BOINE-FRANKENHEIM: Instability theory and modeling
12:00 - 12:30 Elena SHAPOSHNIKOVA: Instability observations and cures

12:30 - 14:30 Lunch

14:30 - 16:00 San Vittorino Hall

SESSION 2: Impendance theory and modeling
Chair: Ursula VAN RIENEN

14:30 - 14:50 Karl BANE: Wakefields/impendances for a bunch moving between two corrugated plates
14:50 - 15:10 Gennady STUPAKOV: Calculation of wakefields for plasma-wakefield accelerators
15:10 - 15:30 Erion GJONAI: Advanced methods of wakefields calculations - numerical methods, parallel computing
15:30 - 15:50 Igor ZAGORODNOV: Analytical impedance models for very short bunches

Coffee/Tea break

SESSION 2: Impedance theory and modeling
Chair: Ursula Van Rienen

16:20 – 16:40 Multi-physics simulations of impedance effects in accelerators
16:40 – 17:00 Stefano De Santis: Impedance Issues in the Design, Measurements, and Beam Commissioning of a Narrow Gap Stripline Kicker For On-Axis Injection
17:00 – 17:20 Thomas FLISGEN: Eigenmode Computations for Chains of Cavities
17:20 – 17:40 Renato FEDELE: The concept of coupling impedance in the self-consistent plasma wake field excitation
17:40 – 18:10 Vittorio Giorgio VACCARO: Special seminar to celebrate the 50 years of the beam coupling impedance concept

20:00 – 22:00 Welcome dinner at Hotel Traiano

WEDNESDAY 20 SEPTEMBER 2017

San Vittorino Hall

09:00– 10:20SESSION 3: Impedance modeling, measurements and control
09:00– 09:20 Andrea MOSTACCI: Challenges and pitfalls for impedance measurement in the lab
09:20– 09:40 Nicolò BIANCACCI: 2D and 3D collimator impedance modelling and experimental measurements
09:40– 10:00 Hans-Walter Glock: Continuous-Wave HOM Load Power Computations Based on Single-Bunch Wake Simulations
10:00 – 10:20 Christine VOELLINGER: Needs and solutions for impedance reduction

10:20– 10:50Coffee/Tea break

10:50 – 11:10 Alexandre LASHEEN: Beam measurements of frequency characteristics of (longitudinal) impedance
11:10 – 11:30Beam-based impedance measuremen techniques in light sources
11:30– 11:50 Karl BANE: Comparison of machine impedance calculation with beam based measurements
11:50– 12:10 Boris Podobedov: Precise impedance determination from simultaneously measured tunes of unequal charge bunches
12:10– 12:30 An improved method to measure beam impedance with rotating wire. Theoretical and simulation results

12:30– 14:00 Finger-food lunch at San Vittorino complex

14:00– 22:30 Excursion and social dinner

THURSDAY 19 SEPTEMBER 2017

San Vittorino Hall

SESSION 4: Instability theory and modeling
Chair: Ingo HOFMANN

09:00– 09:20 Mike Blaskiewicz: Role of space charge in coherent instabilities
09:20– 09:40 Yong Ho Chin: Chromaticity effects on head-tail instabilities for broad-band impedance using two particle model, Vlasov analysis, and simulations09:40– 10:00 TMCI at strong space charge
10:00– 10:20 Microbunching instability

10:20– 10:50 Coffee/Tea break

10:50 – 11:10 Xavier Buffat: Circulant matrix formalism, benchmarks and beam-beam effect in coherent instabilities
11:10 – 11:30 Annalisa Romano: How e-cloud in dipoles and quadrupoles can be source of transverse instabilities
11:30– 11:50 Lotta METHER: Modeling of fast beam ion instabilities
11:50 – 12:10 Alexis GAMELIN: Longitudinal and transverse ions cloud dynamics in an electron ring in presence of electromagnetic fields and gaps

12:10 – 14:00 Lunch

San Vittorino Hall

SESSION 5: Instability modeling, observations and cures
Chair: Mikhail Zabov

Scientific secretary: Eleonora Belli

14:00 – 14:20 Mitigation of collective effects by optics optimization
14:20 – 14:40 Helga TIMKO: Simulation of longitudinal intensity effects with LLRF system (BLonD)
14:40 – 15:00 Heiko DAMERAU: Observation and active damping of longitudinal coupled bunch instabilities
15:00 – 15:20 Serena Persichelli: Challenges in impedance and instabilities computation for new generation light sources

15:20 - 15:50 Coffee/Tea break

San Vittorino Hall

SESSION 5: Instability modeling, observations and cures
Chair: Mikhail Zobov
Scientific secretary: Eleonora Belli

15:50 – 16:10 Nicolas MOUNET: Vlasov solvers and macroparticle simulations
16:10 – 16:30 Codes benchmarking for the single-bunch instabilities in electron storage rings
16:30 – 16:50 Alessandro Drago: Transverse feedback systems for multi-bunch beam diagnostics and instabilities suppression
16:50 – 17:10John D. FOX : Wide-band feedback systems to diagnose and suppress intrabunch motion in accelerators

18:00 - 19:30 Poster session at Chiostro di Santa Sofia (Museum of Sannio)

19:30 – 22:30 Concert and dinner

FRIDAY 20 SEPTEMBER 2017

San Vittorino Hall

SESSION 6: Instability modeling, observations and cures
Chair: Mikhail Zobov
Scientific secretary: Eleonora Belli

09:00 – 09:20 Vladimir KORNILOV: Damping of transverse instabilities
09:20 – 09:40 Concept and simulations of unconventional damping devices: wideband damper and RFQ
09:40 – 10:00 Ingo HOFMANN: A study of longitudinal effects on transverse Landau damping
10:00 – 10:20 Claudia TAMBASCO: Beam Transfer Function (BTF) measurements and transverse stability in presence of beam-beam

10:20 – 10:50 Coffee/Tea break

10:50 - 12:30 SPECIAL SESSION: Overview on different types of machines
Chair: Chris Prior

10:50 – 11:10 Mauro MIGLIORATI: Impedance and instabilities in lepton colliders
11:10 – 11:30 Benoit SALVANT: Impedance and instabilities in hadron machines
11:30 – 11:50 Alexei Blednykh: Impedance modeling in low emittance rings
11:50 – 12:10 Alexey BUROV: Instabilities in hadron colliders and role of the transverse damper

12:10 – 13:30 Farewell lunch at San Vittorino complex

SESSION 7: Conclusions

13:30 – 13:45 Ursula Van Rienen: Closing remarks of ‘Session 2: Impedance theory and modeling’
13:45 – 14:00 Maria Rosaria Masullo: Closing remarks of ‘Session 3: Impedance measurements and control
14:00 – 14:15 Ingo HOFMANN: Closing remarks of ‘Session 4: Instability theory and modeling’
14:15 – 14:30 Mikhail ZOBOV: Closing remarks of ‘Session 5: Instability modeling, observations and cures’
14:30 – 14:45 Giovanni RUMOLO: Closing remarks, acknowledgements and goodbye

15:45 – 16:45 Transfer to Naples airport (shuttles at 15:45 and Saturday morning at 7:00)