Welcome to the LHC impedance webpage !
 

This webpage is designed to gather information related to the bench measurements, simulations and theory related to the impedance of LHC elements at CERN, Geneva.

This webpage is still a work in progress.

 

• Next coffee meeting:

Date :          Gaussian distribution centered on Fridays
Location:    PS cafeteria
 

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• Minutes of previous coffee meetings

• January 12^th, 2010    (minutes)
   

• November 13^th, 2009    (minutes)

• March 10^th, 2009    (minutes)
   

• November 10^th, 2008   (minutes)
   

• November 7^th, 2008   (minutes)
   
• June 9^th, 2008    (minutes)
   
• April 9^th, 2008    (minutes)
   
• March 7^th, 2008    (minutes)
   
• February 19^th, 2008 (minutes)
   
• February 14^th, 2008 (minutes, PIM measurements)
   
• February 2^nd, 2008 (minutes)
   
• January 18^th, 2008 (minutes)
   
• January 11^th, 2008 (minutes)
   
• December 17^th, 2007 (minutes)

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• Presentations

• May 19-20^th, 2009: Prof. V. Vaccaro invited seminar at CERN (slides, minutes)
   
• April 2^nd, 2009 at the Conceptual Design Review LHC Phase II Collimation (LHC Collimation Working Group):

  -   Collimation-Driven Impedance (E. Métral et al - pdf)

   

• Feb. 18^th, 2009 at CERN/GSI beam dynamics and collective effects collaboration meeting (collaboration meeting website):

  -  News on the transverse wall impedance at low frequencies (E. Métral et al - pdf)

   
• Feb. 4^th, 2008 at the LHC Collimation Working Group:

-   Status of Collimator Transverse Impedance Measurements (B. Salvant et al - pdf)
 

• Dec. 3^rd, 2007 at the CERN AB/ABP-LCU section meeting:

-   Update on resistive wall transverse impedance measurements at low frequency (graphite samples  and PIMs) (F. Roncarolo et al - pdf)

-   Low Frequency Transverse Impedance Simulations of Collimators - Preliminary Results (T. Kroyer - pdf)
 

• Nov. 14^th, 2007 at the occasion of the visit of Yong-Ho Chin and Yoshihiro Shobuda

   -   Low Frequency Collimator Measurements - Preliminary Results (F. Roncarolo et al - pdf)
  
   

• Dec. 6^th, 2006 at the LHC Technical Committee (LTC)

   -   LHC Collimator Impedance (E. Métral - ppt)

   

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• LHC Equipments

• TDI
   
• TCDD
   
• TCLIA - TCTV
   
• PIMs
   
• TOTEM Roman Pots
   
• Collimators
   

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• Other Reference Material

• Theory of beam impedance
   
• Electron cloud mitigation carbon coating impedance
   
• RF Measurement using the two wires method
   
• Measurement of the DC conductivity of graphite plates
   
• Simulation and calculation codes
   
• Pictures

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• Related Links
   
  • MSWG (Machine Studies Working Group) (former APC - Accelerator Performance Committee)
     
  • LCU section (LHC Commissioning and Upgrade)
     
  • LHC Collimation Working Group
     
  • SPS Impedance webpage
     
  • PS Impedance webpage

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• For inquiries or comments, please contact: