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

Sep 18 – 22, 2017
Benevento
Europe/Rome timezone

Contribution List

57 / 57
0. Welcome and general introduction
Stefania Petracca (SA)
9/19/17, 9:00 AM
1. Impedance theory and modeling
Dr Elias Metral (CERN)
9/19/17, 9:30 AM
2. Impedance measurement techniques
Dr Uwe Niedermayer (TU-Darmstadt)
9/19/17, 10:00 AM
4. Electron cloud effects
Mr Giovanni Iadarola (CERN - Università di Napoli Federico II)
9/19/17, 11:00 AM
5. Instability theory and modeling
Prof. Oliver Boine-Frankenheim (Technische Universität Darmstadt)
9/19/17, 11:30 AM
6. Instability observations and cures
Dr Elena Shaposhnikova (CERN)
9/19/17, 12:00 PM
7. Wakefields/impedances for a bunch moving between two corrugated plates
Karl Bane (SLAC)
9/19/17, 2:30 PM
8. Calculation of wakefields for plasma-wakefield accelerators
Dr Gennady Stupakov (SLAC)
9/19/17, 2:50 PM
10. Advanced method of wakefield calculations (numerical methods, parallel computing)
Dr Erion Gjonaj (TU-Darmstadt)
9/19/17, 3:10 PM
11. Analytical impedance models for very short bunches
Igor Zagorodnov (DESY)
9/19/17, 3:30 PM
9. Multi-physics simulations of impedance effects in accelerators
Dr Carlo Zannini (ADAM)
9/19/17, 4:20 PM
13. Impedance Issues in the Design, Measurements, and Beam Commissioning of a Narrow Gap Stripline Kicker For On-Axis Injection
Dr Stefano De Santis (LBNL)
9/19/17, 4:40 PM
30. Eigenmode Computations for Chains of Cavities
Thomas Flisgen (Helmholtz Zentrum Berlin)
9/19/17, 5:00 PM
12. 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)
9/19/17, 5:20 PM
14. "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)
9/19/17, 5:40 PM
23. Challenges and pitfalls for impedance measurements in the lab
Andrea Mostacci (ROMA1)
9/20/17, 9:00 AM
22. 2D and 3D collimator impedance modelling and experimental measurements
Dr Nicolo Biancacci (CERN)
9/20/17, 9:20 AM
93. Continuous-Wave HOM Load Power Computations Based on Single-Bunch Wake Simulations
Hans-Walter Glock (FG-ISRF)
9/20/17, 9:40 AM
21. Needs and solutions for machine impedance reduction
Dr Christine Vollinger (CERN)
9/20/17, 10:00 AM
24. Beam measurements of frequency characteristics of (longitudinal) impedance
Dr Alexandre Lasheen (CERN)
9/20/17, 10:50 AM
27. Beam-based impedance measurement techniques in light sources
Dr Ryutaro Nagaoka (Soleil)
9/20/17, 11:10 AM
110. Comparison of machine impedance calculation with beam based measurements
Karl Bane (SLAC)
9/20/17, 11:30 AM
29. Precise impedance determination from simultaneously measured tunes of unequal charge bunches
Dr Boris Podobedov (Brookhaven National Laboratory)
9/20/17, 11:50 AM
28. An improved method to measure beam impedance with rotating wire. Theoretical and simulation results
Mr Olav Berrig (CERN)
9/20/17, 12:10 PM
32. Role of space charge in coherent instabilities
Dr Mike Blaskiewicz (BNL)
9/21/17, 9:00 AM
34. Chromaticity effects on head-tail instabilities for broad-band impedance using two particle model, Vlasov analysis, and simulations
Dr Yong Ho Chin (KEK)
9/21/17, 9:20 AM
85. TMCI at strong space charge
Dr Timofey Zolkin (Fermi National Accelerator Laboratory)
9/21/17, 9:40 AM
33. Microbunching instability
Dr Daniel Ratner (SLAC)
9/21/17, 10:00 AM
37. Circulant matrix formalism, benchmarks and beam-beam effect in coherent instabilities
Dr Xavier Buffat (CERN)
9/21/17, 10:50 AM
111. How e-cloud in dipoles and quadrupoles can be source of transverse instabilities
Ms Annalisa Romano (CERN)
9/21/17, 11:10 AM
35. Modeling of fast beam ion instabilities
Lotta Mether (EPFL)
9/21/17, 11:30 AM
39. 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))
9/21/17, 11:50 AM
40. Mitigation of collective effects by optics optimization and the SPS experience
Mr Hannes Bartosik (CERN)
9/21/17, 2:00 PM
94. Simulation of longitudinal intensity effects with LLRF system (BLonD)
Dr Helga Timko (CERN)
9/21/17, 2:20 PM
86. Observation and active damping of longitudinal coupled bunch instabilities
Heiko Damerau (CERN)
9/21/17, 2:40 PM
95. Challenges in impedance and instabilities computation for new generation light sources
Serena Persichelli
9/21/17, 3:00 PM
45. Vlasov solvers and macroparticle simulations
Dr Nicolas Mounet (EPFL)
9/21/17, 3:50 PM
44. Codes benchmarking for the single-bunch instabilities in electron storage rings
Dr Haisheng Xu (Institute of High Energy Physics of Chinese Academy of Scineces)
9/21/17, 4:10 PM
43. Transverse feedback systems for multi-bunch beam diagnostics and instabilities suppression
Alessandro Drago (LNF)
9/21/17, 4:30 PM
84. Wide-band feedback systems to diagnose and suppress intra-bunch motion in accelerators
John Fox
9/21/17, 4:50 PM
113. Preliminary results from validation measurements of the longitudinal power deposition model for the LHC injection kicker magnet
Mr Vasileios Vlachodimitropoulos (CERN)
9/21/17, 6:00 PM
The MKIs are fast pulsed transmission line injection kicker magnets of the LHC injection system. To shield the ferrite yoke from the beam, by providing a path for the beam image current, a set of 24 conductive wires is placed in the inner part of a ceramic tube along the length of the magnet aperture. Stringent rise-time specifications require that the wires are capacitively coupled to a...
96. Damping of transverse instabilities
Dr Vladimir Kornilov (GSI Helmholtzzentrum)
9/22/17, 9:00 AM
97. Concept and simulations of unconventional damping devices: wideband damper and RFQ
Dr Kevin Li (CERN)
9/22/17, 9:20 AM
98. A study of longitudinal effects on transverse Landau damping
Prof. Ingo Hofmann (GSI Darmstadt)
9/22/17, 9:40 AM
99. Beam Transfer Function (BTF) measurements and transverse stability in presence of beam-beam
Ms Claudia Tambasco (EPFL, Lausanne, Switzerland)
9/22/17, 10:00 AM
101. Impedance and instabilities in lepton colliders
Mauro Migliorati (ROMA1)
9/22/17, 10:50 AM
102. Impedance and instabilities in hadron machines
Benoit Salvant (CERN)
9/22/17, 11:10 AM
103. Impedance modeling in low emittance rings
Dr Alexei Blednykh (BNL)
9/22/17, 11:30 AM
104. Instabilities in hadron colliders and role of the transverse damper
Dr Alexey Burov (Fermilab)
9/22/17, 11:50 AM
52. Closing remarks of Session 2: Impedance theory and modeling
Ursula Van Rienen (uni Rostock)
9/22/17, 1:30 PM
53. Closing remarks of Session 3: Impedance measurements and control
Maria Rosaria Masullo (NA)
9/22/17, 1:45 PM
54. Closing remarks of Session 4: Instability theory and modeling
Prof. Ingo Hofmann (GSI Darmstadt)
9/22/17, 2:00 PM
55. Closing remarks of Session 5: Instability modeling, observations and cures
Mikhail Zobov (LNF)
9/22/17, 2:15 PM
56. Closing remarks, acknowledgements and goodbye
Dr Giovanni Rumolo (CERN)
9/22/17, 2:30 PM
38. Coherent head-tail instability in collision with a large crossing angle
Dr Kazuhito Ohmi ohmi (KEK)
70. Conclusions
oral
This contribution will be the workshop closure with general conclusions from the experience, acknowledgement of participants and farewell
3. Impedance Effects on Beam Dynamics in the 50 MeV ThomX Storage Ring
Mr Alexis Gamelin (Laboratoire de l’Accélérateur Linéaire (LAL))
poster
ThomX is a low energy Compton Backscattering Source (CBS) demonstrator which is being built at LAL, Orsay, France. As the 18 m storage ring has a design energy of 50 MeV, the electron beam is very sensible to collective effects. Furthermore the beam is extracted while a new one is injected every 20 ms, and the damping time is about 2 seconds. So the electron dynamics is not damped and the beam...
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