Title :
An investigation of the source of a low-Q, low-frequency impedance disrupting bunch coalescing in the Fermilab Main Ring
Author :
Colestock, P.L. ; Griffin, J. ; Lu, X. ; Jackson, G. ; Jensen, C. ; Lackey, J.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
Abstract :
Recent studies of bunch coalescing in the Fermilab Main Ring have indicated the likelihood of a low-frequency, low-Q resonator being responsible for the distortion of the coalesced bunch at high beam intensities. Numerical simulations have shown that a high longitudinal impedance is sufficient to account for the observed bunch break-up. A survey of possible offending beam components has been made, and measurements of the longitudinal impedance of these components, including a variety of kicker magnets and coalescing cavities in the main ring, have been carried out.<>
Keywords :
particle beam diagnostics; proton accelerators; synchrotrons; Fermilab Main Ring; bunch break-up; coalescing cavities; impedance disrupting bunch coalescing; kicker magnets; longitudinal impedance; low-Q resonator; Degradation; Distortion measurement; Impedance measurement; Laboratories; Magnetic analysis; Magnets; Numerical simulation; Protons; Time series analysis; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.165263
