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Crisp, J. L.

Paper Title Page
MOPAS011 Uniform Longitudinal Beam Profiles in the Fermilab Recycler Using Adaptive RF Correction 458
 
  • M. Hu, D. R. Broemmelsiek, B. Chase, J. L. Crisp, N. E. Eddy, P. W. Joireman, K. Y. Ng
    Fermilab, Batavia, Illinois
  
  Non-uniformity in longitudinal beam profiles due to potential well distortion have been observed in the Fermilab Recycler Ring. The main source of distortion, the analysis, and the experimental verification of a solution are presented. An adaptive algorithm has been developed to remove the distortion. This algorithm has been implemented in a custom FPGA-based module, which has been integrated into the current Low Level RF system.  
TUPAS015 Operational Aspects of the Main Injector Large Aperture Quadrupole 1685
 
  • W. Chou, C. L. Bartelson, B. C. Brown, D. Capista, J. L. Crisp, J. DiMarco, J. Fitzgerald, H. D. Glass, D. J. Harding, B. Hendricks, D. E. Johnson, V. S. Kashikhin, I. Kourbanis, W. F. Robotham, T. Sager, M. Tartaglia, L. Valerio, R. C. Webber, M. Wendt, D. Wolff, M.-J. Yang
    Fermilab, Batavia, Illinois
  
  Funding: Work supported by Universities Research Association, Inc. under contract No. DE-AC02-76CH03000 with the U. S. Dept. of Energy.

A two-year Large Aperture Quadrupole (WQB) Project was completed in the summer of 2006 at Fermilab.* Nine WQBs were designed, fabricated and bench-tested by the Technical Division. Seven of them were installed in the Main Injector and the other two for spares. They perform well. The aperture increase meets the design goal and the perturbation to the lattice is minimal. The machine acceptance in the injection and extraction regions is increased from 40π to 60π mm-mrad. This paper gives a brief report of the operation and performance of these magnets. Details can be found in Ref**.

* D. Harding et al, "A Wide Aperture Quadrupole for the Fermilab Main Injector," this conference.
** W. Chou, Fermilab Beams-doc-#2479, http://beamdocs.fnal.gov/AD-public/DocDB/DocumentDatabase

 
FRPMS016 A BPM Calibration Procedure using TBT Data 3928
 
  • M.-J. Yang, J. L. Crisp, P. S. Prieto
    Fermilab, Batavia, Illinois
  
  Accurate BPM calibration is important in most lattice analysis. This paper describes a procedure developed as a logical extension of TBT data lattice analysis to extract relative calibration between BPMs in the machine. The method has been applied previously to the Recycler Ring and recently to Main Injector at Fermilab with amazing success. The results will be presented. The BPM position resolution is crucial to the procedure and will also be addressed.