Title :
Head-tail stability and linear coupling in the Tevatron
Author :
Goderre, G.P. ; Peggs, S. ; Annala, G. ; Bogacz, S.A. ; Herrup, D. ; Saritepe, S. ; Sullivan, T. ; Williams, T.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
Abstract :
During collider studies it was observed that with bunch intensities of >60*10/sup 9/ particles per bunch in the Tevatron, the beam would go unstable if the machine ran close to the coupling resonance. Simple head-tail stability only requires the horizontal and vertical chromaticities to be positive. Since the beam went unstable even when this condition was met, a set of experiments were performed which showed that if there is significant linear coupling the head-tail stability criterion is modified. A formalism for calculating head-tail stability is presented. The predictions of the formalism are compared to data taken with the Tevatron.<>
Keywords :
particle beam diagnostics; proton accelerators; synchrotrons; Tevatron; chromaticities; coupling resonance; head-tail stability; linear coupling; particle beam diagnostics; Colliding beam accelerators; Colliding beam devices; Differential equations; Laboratories; Optical coupling; Particle accelerators; Particle beams; Radio access networks; Resonance; Stability criteria;
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.1991.164798
