Repository of useful documents and information on the SPS impedance
 

• Theory of beam impedance

• Calculating, simulating and measuring the impedance of SPS elements

• Localization of impedance sources in the SPS

• Model of the SPS Impedance

• Measurements with beam

• Instabilities

• Simulation and calculation codes
   

    Theory of beam impedance

• USPAS Course on Collective Effects in Beam Dynamics for Particle Accelerators, E. Métral, G. Rumolo, June 2009, Albuquerque, New Mexico, USA:
  
                          Program (pdf, class picture)
  
                          - Introduction (pdf)
                          - General introduction to multi-particle effects (slides, pdf)
                          - Space Charge (pdf)
                          - Envelope Equations (pdf)
                          - Wake fields and impedances (pdf)
                          - Collective effects in the longitudinal plane (slides, pdf)
                          - Collective effects in the transverse plane (coasting beam: pdf, bunched beam: pdf)
                          - Two-stream effects: electron clouds and ion instabilities (slides, pdf)
                          - Numerical modeling and measurement techniques (slides, pdf)
                         
                          - Movies:
                              - Movie_PhaseSpaceEllipseNearPSTransition_UnderWindowsOnly
                              - Movie_WakeFieldSimulationOfaCollimatorByCST
                              - Movie_HTPhaseShiftInTheSPS_UnderWindowsOnly
                              - Movie_SPSFastSBInstability_UnderWindowsOnly
                              - Movie_CBInstabilityInTheSPS_UnderWindowsOnly
                          - Tutorials 1
                          - Tutorials 2
                          - Exam
   

• "Longitudinal Coupling Impedance and Transmission Coefficient from Uniform and Hollow Ring Sources", A. Al Khateeb et al (2008)
   

• "Review of recent LHC impedance activities", E. Metral AB/ABP/LCU meeting, June 17 2008 (slides)
   

• "Resistive-Wall Impedance of an Infinitely long Multi-Layer Cylindrical Beam Pipe" E. Métral, B. Salvant, B. Zotter proc. PAC 2007 (article).
   

• "New Results on the Impedance of Resistive Metal Walls of Finite Thickness", B. Zotter, CERN note 2005 (article)
   

• "Driving and detuning wakes : comparison with Burov Danilov"  Elias Métral - RLC meeting - 02/12/2005 (slides)
   

• "Longitudinal and Transverse Impedances and Shielding Effectiveness of a Resistive Beam Pipe for Arbitrary Energy and Frequency", Ahmed M. Al-Khateeb, O. Boine-Frankenheim, R.W. Hasse and I. Hofmann, HB'04, Benzheim - 2004 (paper).
   

• "Transverse Coupling Impedances From Field Matching in a Smooth Resistive Cylindrical Pipe For Arbitrary Beam Energies", Ahmed M. Al-Khateeb, O. Boine-Frankenheim, R. W. Hasse, Wafa M. Daqa and I. Hofmann  Proc. EPAC 2006 (paper).
   

• "Resistive-wall wake and impedance for nonultrarelativistic beams" F. Zimmerman and K. Oide - PRST/AB - Vol. 7, 044201 (2004), article
   

• "Wake fields and impedance" Palumbo, Vaccaro, Zobov, CAS course 1994 lecture notes.
   

• "Resistive wall impedance of beam pipes of general cross section", Part. Acc., 41 (1993) and KEK preprint 1992 (pdf).
   

• "Resistive wall wake function for arbitrary pipe cross section", K. Yokoya, proc. PAC 1993.(pdf)
   

• Link to Elias Métral webpage (Summer, OP Shutdown, PBL and USPAS courses)

 

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    Calculating, simulating and measuring the impedance of SPS elements (and related)

• Kickers

  • "Follow-up of the last APC on the SPS kickers", E. Métral - Accelerator Performance Committee - 11/05/2007 (pdf)
     
  • "Update on the SPS kickers", E. Métral - Accelerator Performance Committee - 27/04/2007 (pdf)
     
  • "Longitudinal and Transverse Wire Measurements for the Evaluation of Impedance Reduction Measures on the MKE Extraction Kickers" T. Kroyer; F. Caspers, E. Gaxiola, CERN-AB-Note-2007-028 (pdf)
     

  • "Real Part of Impedance for MKE, MKP and MKD Kickers", Jan Uythoven, May 2006 (minutes by F. Zimmermann and links)
     

  • "Kicker Positions, Lengths, Full Apertures, Betas, Dx" G. Arduini, 13.04.2006 (data file)
     

  • "Impedance Inventory SPS Kicker List 2006" E. Gaxiola, 19.04.2006 (MS Excel file)
     

  • Amplitude and Power Spectra Comparison between Different Types of Longitudinal Bunch Profiles for MKE Kicker Heating (E. Métral, slides)
     

  • "Beam Induced Heating of the SPS Fast Pulsed Magnets" J. Uythoven et al, EPAC'04 (pdf)
     

  • "A Retrofit Technique for Kicker Beam-coupling Impedance Reduction", F. Caspers et al, EPAC'04 (pdf) [NDLR: simulations and measurements for impedance reduction of MKQH kickers]
     

  • "Transverse Impedance of Ferrite Elements", A. Burov, LHC Project Note 353, 2004 (pdf)
     

  • "Multilayer Transverse Impedances" A. Burov, RLC meeting 04.06.2004 (pdf)
     

  • "Transverse Coupling Impedance of a Simplified Ferrite Kicker Magnet Model", H. Tsutsui, L. Vos, LHC-PROJECT-NOTE-234 (pdf)
     

  • "Longitudinal impedance from ferrite", L. Vos, CERN-SL-2000-010-AP (pdf)
     

  • "Some Simplified Models of Ferrite Kicker Magnet for Calculation of Longitudinal Coupling Impedance", H. Tsutsui, CERN-SL-2000-004-AP, 2000 (pdf)
     

  • "A laminated-iron Fast Pulsed Magnet", F.E Faugeras et al., CERN-SPS/ABT/77-16 (1977) (pdf). [NDLR: design of the MKDH kicker magnets in laminated steel. Beware:pages scanned in wrong order!]
     

  • Link to Jan van Uythoven's webpage on MKE kickers
    
     

• BPMs

  • "Vertical Impedance (Trapped Modes) of the SPS BPH - Part 1" - G. Arduini, E. Metral, RLC meeting 10.02.2006 (pdf)
     

  • "Vertical Impedance (Trapped Modes) of the SPS BPH - Part 2" - G. Arduini, E. Metral, B. Spataro, RLC meeting 17.02.2006 (pdf)
    
     

• RF cavities

  • "The SPS acceleration system: Travelling Wave Drift tube structure of the CERN SPS"  Georges Dôme CERN - PLAC conf. 1976 (pdf)
     

  • "RF Installations in the SPS, updated 2006-01-25",T. Bohl, U. Wehrle, (pdf)
     

  • "Resonant Impedances in the SPS" , T.P.R. Linnecar, E.N. Shaposhnikova, SL-Note 96-49 RF (pdf)
     

• IPMs

  • "LHC Ionization Profile Monitor impedance measurement" Federico Roncarolo - AB/ABP/RLC meeting -15/07/2005 (pdf, minutes)
     

• Wire scanners

 

 

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    Beam-based localization of impedance sources in the SPS

• Plot of Phase advance as a function of longitudinal position  (Rama Calaga -  status 14/12/2007- pdf)
   
• Plot of the result of localization of sources of impedance (Rama Calaga  - status 20/12/2007- pdf and emails)
   
• "Localization of SPS transverse impedance" Rama Calaga (pdf)
   
• "Localizing impedance sources from betatron-phase beating in the CERN SPS", G. Arduini, C. Carli , F. Zimmermann EPAC'04 (pdf)

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     Model of the SPS Impedance

• "SPS and LHC impedance model"  E Métral - LTC meeting 08/12/2004 (pdf)
   

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     Instabilities

• General
   
  • "Physics of Collective Beam Instabilities in High Energy Accelerators", A. Chao, Wiley (book in pdf).
     
  • "Physics of intensity dependent beam instabilities", K.Y. Ng, (book in pdf).
     
  • "The Headtail Effect: an instability mechanism in storage rings", M. Sands,  SLAC-TN-969-8 (pdf)
     
  • "Headtail Effect 2: from resistive wall wake", M. Sands, SLAC-TN-969-10 (pdf)

• TMCI    (Transverse Mode Coupling Instability)
   
  • "Transverse Mode Coupling Instability in the SPS", Y.H. Chin -  CERN/SPS/85-2 (pdf)
     
  • "Transverse Mode Coupling Instability due to localized structures", F. Ruggiero CERN-LEP-TH/84-21 (pdf)
     
  • "The transverse mode coupling instability in large storage rings", G. Besnier, D. Brandt,B. Zotter, CERN-LEP-TH-84-11 (pdf)

 

• Electron Cloud instability
  
   
• Coupled-bunch instabilities
   
  • "Simulation of Transverse Multi-Bunch Instabilities of Proton Beams in LHC" - PhD thesis Alex Koschik (pdf)
     
  • "Transverse coupled-bunch instabilities for non-symmetric bunch fillings" O. Meincke - CERN-SL-98-018 (AP) (pdf)
     

  • "Fast calculation of the resistive wall wake sum for multi bunch beams" E. Vogel - CERN-AB-2005-017 (pdf)

• Transverse Feedback
   
  • "Simulation of Transient Effects of Beam-Transverse Feedback Interaction with Application to the Extraction of the CNGS Beam
    from the SPS" W. Hofle, E. Vogel - CERN-AB-2005-010 (pdf)
     
  • "Damping of betatron oscillations in the SPS appearing at the two step extraction of CNGS beam" E. Gaxiola,W. Hofle, E. Vogel - CERN-AB-2005-016-ABP (pdf)

     

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     Simulation and calculation codes

• General papers  

      -  "Indirect methods for wake potential integration", I. Zagorodnov, PRST-AB 2006 (paper)
  
      - 

  
   

• HeadTail   (user guide  -  code repository  -  related papers)
   
  • "Note on the longitudinal decoherence of a proton/ion bunch"  Giovanni Rumolo - unpublished  -  2003  (pdf)
     
• ABCI          (user guide  -  code repository  -  related papers)
   
• HFSS
   
• CST Particle Studio/Microwave Studio
  • 
     
• ZBASE      (user guide  -  code repository  -  related papers)
   
  • "ZBASE3 : la nouvelle base de données de l’impédance des accélérateurs du CERN"  Hubert medina -  2007  (rapport doc, rapport pdf, talk ppt).
     
• ANSOFT Maxwell/HFSS
   
• ECHO (I. Zagorodnov and T. Weiland)
        
  • Wakefield calculations for 3D collimators, I. Zagorodnov and K. Bane (PAC'06), (paper)

 

 

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