Session 5: Instability Modeling, Observations and Cures

Slides:

Advertisements

Similar presentations

Summary of the two-stream instability session G. Rumolo, R. Cimino Based on input from the presentations of G. Iadarola, H. Bartosik, R. Nagaoka, N. Wang,

Advertisements

Electron-cloud instability in the CLIC damping ring for positrons H. Bartosik, G. Iadarola, Y. Papaphilippou, G. Rumolo TWIICE workshop, TWIICE.

CornellVideo Talk. Dec page 1 John Byrd Experimental studies of the fast- beam ion instability in the ALS- The Sequel John Byrd Lawrence Berkeley.

Helmholtz International Center for Oliver Boine-Frankenheim GSI mbH and TU Darmstadt/TEMF FAIR accelerator theory (FAIR-AT) division Helmholtz International.

SuperB and the ILC Damping Rings Andy Wolski University of Liverpool/Cockcroft Institute 27 April, 2006.

Longitudinal instabilities: Single bunch longitudinal instabilities Multi bunch longitudinal instabilities Different modes Bunch lengthening Rende Steerenberg.

--- Questions for collective effects session  What are the limits on stored current in ultra-low emittance lattice? - Low horizontal dispersion  low.

Impedance measurements at SLS E. Koukovini-Platia CERN, EPFL TIARA mid-term meeting, Madrid, 13 th June 2012 Many thanks to M. Dehler, N. Milas, A. Streun.

Particle Studio simulations of the resistive wall impedance of copper cylindrical and rectangular beam pipes C. Zannini E. Metral, G. Rumolo, B. Salvant.

Impedance and Collective Effects in BAPS Na Wang Institute of High Energy Physics USR workshop, Huairou, China, Oct. 30, 2012.

Theoretical studies of IBS in the SPS F. Antoniou, H. Bartosik, T. Bohl, Y.Papaphilippou MSWG – LIU meeting, 1/10/2013.

Fast Ion Instability Studies in ILC Damping Ring Guoxing Xia DESY ILCDR07 meeting, Frascati, Mar. 5~7, 2007.

Beam dynamics on damping rings and beam-beam interaction Dec 포항 가속기 연구소 김 은 산.

Beam observation and Introduction to Collective Beam Instabilities Observation of collective beam instability Collective modes Wake fields and coupling.

Oliver Boine-Frankenheim, High Current Beam Physics Group Simulation of space charge and impedance effects Funded through the EU-design study ‘DIRACsecondary.

November 14, 2004First ILC Workshop1 CESR-c Wiggler Dynamics D.Rubin -Objectives -Specifications -Modeling and simulation -Machine measurements/ analysis.

1 Simulations of fast-ion instability in ILC damping ring 12 April ECLOUD 07 workshop Eun-San Kim (KNU) Kazuhito Ohmi (KEK)

Preliminary results on simulation of fast-ion instability at 3 km LBNL damping ring 21 April 2005 Pohang Accelerator Laboratory Eun-San Kim.

High Bandwidth damper Input from W.Hölfe Acknowledgement to all collaborators at SLAC, INFN, LBNL and CERNL Presentation of recent MD results (J.Cesaratto):

BEPCII Transverse Feedback System Yue Junhui Beam Instrumentation Group IHEP ， Beijing.

1 H. Hayano ATF Status June/2004 H. Hayano ATF: emittance status beam study status plan nm-project collaboration & plan ATF review 6/17/2004.

Motivation and Overview David Rubin Cornell Laboratory for Accelerator-Based Sciences and Education.

THE DA  NE 3 RD HARMONIC CAVITY A. Gallo, with D. Alesini, R. Boni, S. Guiducci, F.Marcellini, M. Migliorati, L. Palumbo, M. Zobov.

Argonne National Laboratory is managed by The University of Chicago for the U.S. Department of Energy Effects of Impedance in Short Pulse Generation Using.

INTENSITY LIMITATIONS (Space Charge and Impedance) M. Zobov.

Example: Longitudinal single bunch effects Synchrotron tune spread Synchrotron phase shift Potential well distortion Energy spread widening (microwave.

CERN F. Ruggiero Univ. “La Sapienza”, Rome, 20–24 March 2006 Measurements, ideas, curiosities beam diagnostics and fundamental limitations to the performance.

Overview of Collective Effects in MEIC Rui Li MEIC Collaboration Meeting Oct. 6-8, 2015.

Ion effects in low emittance rings Giovanni Rumolo Thanks to R. Nagaoka, A. Oeftiger In CLIC Workshop 3-8 February, 2014, CERN.

End-of-year talk LIU-SPS BD WG meeting Our meetings in 2015 O During year - 9 meetings of LIU-SPS BD WG (as in 2013, but 10 in 2014 and 12 in.

INTENSITY LIMITATIONS IN THE LHC INJECTORS Discussion on Landau damping Ibon Santiago González Summer Student Session 2007.

Global Design Effort ILC Damping Rings: R&D Plan and Organisation in the Technical Design Phase Andy Wolski University of Liverpool and the Cockcroft Institute,

Three examples of application of Sussix 1)Data from simulations  sensitivity 2)Data from measurements  frequency resolution.

Pushing the space charge limit in the CERN LHC injectors H. Bartosik for the CERN space charge team with contributions from S. Gilardoni, A. Huschauer,

1 1 H. Hayano and ATF group ATF Status August/2004 H. Hayano and ATF group Multibunch emittance Instrumentation developments Plans for run Multibunch.

Characterization of the Fast Ion Instability at CesrTA David Rubin Cornell University.

LIU-SPS Beam Dynamics WG E. Shaposhnikova LIU-SPS coordination meeting

ISG – Damping Ring Physics and Design Group ATF – 2003// focus on the TRC challenge Marc Ross – 1.Instability about which little is known: Fast ion,

Two-Stream Phenomena in CLIC G. Rumolo and D. Schulte for the ACE, 3 September 2008 * thanks to W. Bruns, R. Tomás, SPSU Working Team General introduction.

Two-beam instabilities in low emittance rings Lotta Mether, G.Rumolo, G.Iadarola, H.Bartosik Low Emittance Rings Workshop INFN-LNF, Frascati September.

Two beam instabilities in low emittance rings Lotta Mether, G.Rumolo, G.Iadarola, H.Bartosik Low Emittance Rings Workshop INFN-LNF, Frascati September.

ESLS Workshop Nov 2015 MAX IV 3 GeV Ring Commissioning Pedro F. Tavares & Åke Andersson, on behalf of the whole MAX IV team.

Geometric Impedance of LHC Collimators O. Frasciello, S. Tomassini, M. Zobov LNF-INFN Frascati, Italy With contributions and help of N.Mounet (CERN), A.Grudiev.

Frank Stulle, ILC LET Beam Dynamics Meeting CLIC Main Beam RTML - Overview - Comparison to ILC RTML - Status / Outlook.

Beam Instability in High Energy Hadron Accelerators and its Challenge for SPPC Liu Yu Dong.

Loss of Landau damping for reactive impedance and a double RF system

Theory, observations and mitigation of dancing bunches in the Tevatron

The TWIICE workshop Benoit for the ABP participants (Andrea, Gianni, Giovanni, Hannes, Lotta, Stefania, Yannis) ABP information meeting March 31st 2016.

LEIR IMPEDANCE AND INSTABILITY MEASUREMENTS

DELPHI and Vlasov solvers used at CERN

The HEADTAIL Development Working Group (HDWG)

Follow up on SPS transverse impedance

Longitudinal beam parameters and stability

Proposals for 2015 impedance-related MD requests for PSB and SPS

A. Al-khateeb, O. Chorniy, R. Hasse, V. Kornilov, O. Boine-F

Cavity-beam interaction and Longitudinal beam dynamics for CEPC DR&APDR 宫殿君

FCC-ee: coupling impedances and collective effects

Closing remarks of “Session 3: Impedance measurements and control”

LHC at 7 TeV/c: comparison phase 1 / IR3MBC

Invited talk TOAC001 ( min, 21 slides)

The SPS 800 MHz RF system E. Shaposhnikova for BE/RF

All our thanks to Kevin Li and Michael Schenck BE/ABP-HSC CERN

E. Métral, G. Rumolo, R. Tomás (CERN Switzerland), B

Collective Effects and Beam Measurements in Particle Accelerators

Beam-Beam Interaction in Linac-Ring Colliders

Ions in ATF ISG-X June 20th, 2003.

Collective effects in the SPS and LHC (longitudinal plane)

CERN-SPS horizontal instability

R&D GOALS AND MILESTONES TOWARDS A TECHNICAL DESIGN REPORT TDR (2008)

ESRF Experimental Contribution Towards Working Group Introduction

Presentation transcript:

Session 5: Instability Modeling, Observations and Cures Chairman: Mikhail Zobov, Scientific Secretary: Eleonora Belli Session 5.1 Mitigation of collective effects by optics optimization (H. Bartosik, CERN) Simulation of longitudinal intensity effects with control loops (BLonD) (H.Timko, CERN) Observation and active damping of longitudinal coupled bunch instabilities (H.Damerau, CERN) Challenges in impedance and instabilities computation for new generation light sources (S.Persichelli, LBNL) Session 5.2 Vlasov solvers and macroparticle simulations (N.Mounet, EPFL) Codes benchmarking for single-bunch instabilities in electron storage rings (H.Xu, IHEP) Transverse feedback systems for multibunch beam diagnostics and instabilities supression (A.Drago, LNF INFN) Wide-band feedback systems to diagnose and suppress intra-bunch motion in accelerators (J.Fox, SLAC) Session 5.3 Damping of transverse instabilities (V.Kornilov, GSI) Concept and simulations of unconventional damping devices: wideband damper and RFQ (K.Li, CERN) A study of longitudinal effects on transverse Landau damping (I.Hofmann, GSI) Beam Transfer Function (BTF) measurements and transvrse stability in presence of beam-beam (C.Tambasco, EPHL)

H.Bartosik – Mitigation of Collective Effects by Optics Optimization

LHC Operational Experience BLonD Code Benchmarking Accurate calculations require modelling intensity effects with beam- and cavity-based feedbacks The BLonD code has precise models of the CERN machines Benchmarks and optimizations are required to obtain reliable and fast simulations H.Timko – Simulation of Longitudinal Intensity Effects with Control Loops

H.Damerau – Observation and (active) damping of longitudinal coupled bunch instabilities

H.Damerau – Observation and (active) damping of longitudinal coupled bunch instabilities

Ultra-low tramsverse emittance (50 pm) High multibunch current (500 mA) Short bunch length Very narrow vacuum chambers High Coupling Impedance IBS requires harmonic cavity Fast ions? Quadrupolar tune shifts? RW+NEG Longitudinal RW+NEG Transverse S.Persichelli – Challenges in impedance and instabilities computations ..(ALS-U example)

N.Mounet – Vlasov Solvers and Particle Simulations

N.Mounet – Vlasov Solvers and Particle Simulations

H.Xu – Code benchmarking and simulation studies of single-bunch instabilities in electron storage rings

Instability growth rate Real time tune measurements Synchronous phase along train Transverse tunes bunch-by-bunch A.Drago – Transverse feedbacks for multibunch beam diagnostics and instabilities suppression

J.D.Fox – Wide-band Feedback Systems to Diagnose and Suppress Intra-bunch Motion in Accelerators

J.D.Fox – Wide-band Feedback Systems to Diagnose and Suppress Intra-bunch Motion in Accelerators

K.Li – Concept and Simulations of Unconventional Damping Devices: Wideband damper and RFQ

K.Li – Concept and Simulations of Unconventional Damping Devices: Wideband damper and RFQ

I.Hofmann – Longitudinal effects in Landau damping due to space charge nonlinearity

I.Hofmann – Longitudinal effects in Landau damping due to space charge nonlinearity

C.Tambasco – Beam transfer function measurements and transverse stability in presence of beam-beam

C.Tambasco – Beam transfer function measurements and transverse stability in presence of beam-beam