Long-range beam-beam interactions in the Tevatron: Comparing simulation to tune shift data
Fermilab upgrade plans for the collider operation include a separation scheme in the Tevatron, in which protons and antiprotons are placed on separate helical orbits. The average separation distance between the closed orbits will be 5{sigma} ({sigma} of the proton bunch) except at the interaction regions, B0 and D0, where they collide head-on. The maximum beam-beam total tune shift in the Tevatron is approximately 0.024 (the workable tune space between 5th and 7th order resonances), which was reached in the 1988--1989 collider tun. Helical separation scheme allows us to increase the luminosity by reducing the total beam-beam tune shift. The number of bunches per beam will be 6 in the 1991 collider tun, to be increased to 36 in the following collider runs. To test the viability of this scenario, helical orbit studies are being conducted. The most recent studies concentrated on the injection of 36 proton bunches, procedures related to opening and closing of the helix, the feed-down circuits and the beam-beam interaction. In this paper, we present the results of the beam-beam interaction studies only. Our emphasis is on the tune shift measurements and the comparison to simulation. 4 refs., 9 figs., 2 tabs.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 6714267
- Report Number(s):
- FNAL/C-90/134; CONF-900603-27; ON: DE90014984; TRN: 90-028696
- Resource Relation:
- Conference: 2. European particle accelerator conference, Nice (France), 11-16 Jun 1990
- Country of Publication:
- United States
- Language:
- English
Similar Records
Exploratory orbit analysis of Tevatron helical upgrade: One: A first look
New aspects of beam-beam interactions in hadron colliders