Emittance measurement and modeling for the Fermilab Booster

Details Emittance measurement and modeling for the Fermilab Booster Emittance measurement and modeling for the Fermilab Booster

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006phrvs...9a4202h&link_type=abstract

Physical Review Special Topics - Accelerators and Beams, vol. 9, Issue 1, id. 014202

Physics

2

Space-Charge-Dominated Beams, Beams In Particle Accelerators, Observation And Data Reduction Techniques, Computer Modeling And Simulation

Scientific paper

Turn-by-turn beam profile data measured at the Fermilab Booster are studied. Lattice models with experimental accelerator ramping parameters are used to obtain the lattice functions for data analysis. We studied the horizontal and vertical emittance growth behavior in different stages of a booster ramping cycle and its relation to the beam intensity. The transverse and longitudinal components in the horizontal beam width are separated by a fitting model which makes use of the different scaling rules of the beam momentum. We analyze the post-transition horizontal beam size oscillation based on a model where the longitudinal phase-space mismatch has resulted from rf voltage mismatch during the transition-energy crossing. We carried out systematic multiparticle simulation to show that the source of the vertical emittance growth is a combination of the random errors in skew-quadrupole and dipole fields, and the systematic Montague resonance. The effect of random quadrupole field is small for the Fermilab Booster because the betatron envelope tunes are reasonably far away from the half-integer stop band.

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