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Faus-Golfe, A.

Paper Title Page
WE6PFP075 Effect of the Non-Linear Magnetic Fields on the Emittance Growth in the ATF Extraction Line 2670
 
  • M. Alabau, P. Bambade, G. Le Meur, F. Touze
    LAL, Orsay
  • A. Faus-Golfe
    IFIC, Valencia
  • S. Kuroda
    KEK, Ibaraki
  • M. Woodley
    SLAC, Menlo Park, California
  
 

Since several years, the vertical beam emittance measured in the Extraction Line (EXT) of the Accelerator Test Facility (ATF) at KEK, has been significantly larger than that measured in the damping ring (DR) itself. The EXT line that transports the beam to the ATF2 Final Focus beam line has been rebuilt, but the extraction itself remains in most part unchanged, with the extracted beam transported off-axis horizontally in two of the quadrupoles, beyond the linear region for one of them. A few other nearby magnets have also modelled or measured non-linearity. In case of a residual vertical beam displacement, this can result in increased vertical emittance through coupling between the two transverse planes. Tracking studies as well as measurements have been carried out to study this effect and the induced sensitivity of beam optical parameters to the trajectory at injection, in view of deriving tolerances for reproducible and stable operation.

  
TH5RFP054 Construction and Characterization of the Inductive Pick-Up Series for Beam Position Monitoring in the TBL Line of the CTF3 at CERN 3576
 
  • A. Faus-Golfe, C. Blanch Gutierrez, J.V. Civera-Navarrete, J.J. García-Garrigós
    IFIC, Valencia
  
 

Funding: FPA 2007-31124-E (MICINN)


A set of two Inductive Pick-Up (IPU) prototypes with its associated electronics for Beam Position Monitoring in Test Beam Line (TBL) in the 3rd CLIC Test Facility (CTF3) at CERN were designed, constructed, characterized and tested by the IFIC. One of these two prototypes is already mounted in the first module of the TBL line for testing with beam. In the first part of this paper we described the first tests performed with beam in the prototype. The second part of this paper is dedicated to the description of the construction, performance characterization and installation of a series of 15 units, including its respective mechanical supports in the complete TBL line in spring 2009.