Experimental study of passive compensation of space charge at the Los Alamos National Laboratory Proton Storage Ring

• Main Authors: M. A. Plum, D. H. Fitzgerald, J. Langenbrunner, R. J. Macek, F. E. Merrill, F. Neri, H. A. Thiessen, P. L. Walstrom, J. E. Griffin, K. Y. Ng, Z. B. Qian, D. Wildman, B. A. Prichard, Jr.
• Format: Article
• Language: English
• Published: American Physical Society 1999-06-01
• Series: Physical Review Special Topics. Accelerators and Beams
• Online Access: http://doi.org/10.1103/PhysRevSTAB.2.064201
• ISSN: 1098-4402

The inductance of the vacuum chamber of the Proton Storage Ring at Los Alamos National Laboratory was intentionally increased by the introduction of ferrite rings to counteract the longitudinal space-charge effect of the intense beam. The magnetic permeability of the ferrite could be adjusted by introducing current into solenoids wound around the ferrite. Results show that the minimum rf voltage necessary to stabilize the beam against e-p instability may be reduced over that previously measured. The injected bunch length was observed to be longer when the ferrite was heavily biased so that its effect was reduced.