Magnetic field measurement and compensation in the Recycler Electron Cooler

Conference · Thu Sep 01 04:00:00 EDT 2005 · AIP Conf.Proc.821:375-379,2006

OSTI ID:875515

Tupikov, V; Kazakevich, Grigory M; Kroc, T K; Nagaitsev, S; Prost, L; Shemyakin, A; Schmidt, C W; Sutherland, M; Warner, A

Cooling of 8.9-GeV/c antiprotons in the Recycler Electron Cooler requires a round 4.34-MeV electron beam with a small angular spread propagating through a 20-m long cooling section. To confine the electron beam tightly and to keep its total transverse angles below 0.2 mrad the cooling section is immersed in a solenoidal field of 50-200 G. The field was measured with a compass-based sensor (transversal) and a hall-probe (longitudinal) after installation of the solenoids into the Recycler tunnel. For the field strength of 105 G, the transverse field components were compensated to the level that provided corresponding dipole beam oscillations below 0.1 mrad, which in turn allowed the first cooling of antiprotons in the GeV energy range. This paper discusses the field measurements and compensation scheme including the results of dipole oscillation measurements.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 875515
• Report Number(s): FERMILAB-CONF-05-397-AD
• Conference Information: Journal Name: AIP Conf.Proc.821:375-379,2006
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ANTIPROTONS
Accelerators
BEAM COOLING
DIPOLES
ELECTRON BEAMS
ELECTRONS
ENERGY RANGE
HEAT EXCHANGERS
MAGNETIC FIELDS
OSCILLATIONS
SOLENOIDS