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

fYear

1991

fDate

6-9 May 1991

Firstpage

1746

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/PAC.1991.164764

Filename

164764