Optics of electron beam in the Recycler

Conference · Tue Nov 01 04:00:00 EST 2005 · AIP Conf.Proc.821:139-143,2006

OSTI ID:878989

Burov, Alexey V; Kazakevich, G; Kroc, T; Lebedev, V; Nagaitsev, S; Prost, L; Pruss, S; Shemyakin, A; Sutherland, M; Tiunov, M; Warner, A

Electron cooling of 8.9 GeV/c antiprotons in the Recycler ring (Fermilab) requires high current and good quality of the DC electron beam. Electron trajectories of {approx}0.2 A or higher DC electron beam have to be parallel in the cooling section, within {approx}0.2 mrad, making the beam envelope cylindrical. These requirements yielded a specific scheme of the electron transport from a gun to the cooling section, with electrostatic acceleration and deceleration in the Pelletron. Recuperation of the DC beam limits beam losses at as tiny level as {approx}0.001%, setting strict requirements on the return electron line to the Pelletron and a collector. To smooth the beam envelope in the cooling section, it has to be linear and known at the transport start. Also, strength of the relevant optic elements has to be measured with good accuracy. Beam-based optic measurements are being carried out and analyzed to get this information. They include beam simulations in the Pelletron, differential optic (beam response) measurements and simulation, beam profile measurements with optical transition radiation, envelope measurements and analysis with orifice scrapers. Current results for the first half-year of commissioning are presented. Although electron cooling is already routinely used for pbar stacking, its efficiency is expected to be improved.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 878989
• Report Number(s): FERMILAB-CONF-05-463-AD
• Conference Information: Journal Name: AIP Conf.Proc.821:139-143,2006
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATION
ACCURACY
ANTIPROTONS
Accelerators
BEAM COOLING
BEAM PROFILES
COMMISSIONING
EFFICIENCY
ELECTRON BEAMS
ELECTRON COOLING
ELECTRONS
ELECTROSTATICS
OPTICS
PELLETRON ACCELERATORS
TRAJECTORIES
TRANSITION RADIATION