Title :
Longitudinal instability in the Fermilab accumulator during slow transition crossing
Author :
Wang, X.Q. ; Jackson, G.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
Abstract :
Recently the Fermilab Accumulator was modified for use in a medium energy experiment studying charmonium states. The experiment required a circulating antiproton beam with momenta between 6.7GeV/c and 3.7 GeV/c. During accumulator transition crossing with this coasting beam, longitudinal instability was observed with a resistive wall current monitor and a dedicated longitudinal Schottky detector. Results are presented of measurements in which longitudinal coherent signals and emittance growth were observed. The data are compared to the predictions of a multiparticle computer simulation.<>
Keywords :
particle beam diagnostics; proton accelerators; storage rings; synchrotrons; Fermilab Accumulator; accumulator transition crossing; charmonium states; circulating antiproton beam; coasting beam; emittance growth; longitudinal Schottky detector; longitudinal coherent signals; longitudinal instability; multiparticle computer simulation; resistive wall current monitor; Computer simulation; Current measurement; Energy loss; Extraterrestrial measurements; Frequency measurement; Kinetic energy; Laboratories; Particle beams; Protons; Storage rings;
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.1991.164764
