Title :
Electron beam collector with a low back flow
Author_Institution :
Fermi Nat. Accelerator Lab., Batavia, IL, USA
Abstract :
Generation of a DC electron beam in the future Fermilab electron cooler employs an electrostatic acceleration and a beam energy recovery, so that electrons are decelerated from the nominal energy of 4.3 MeV they have in the cooling section to few keV in the collector. Stable performance of this scheme requires a current loss δI below 10 μA at the beam current up to the nominal value of I=0.5 A. One of sources of the loss is a back flow of secondary electrons from the beam collector. The paper discusses principles and performance of a collector with the low current loss.
Keywords :
accelerator magnets; electron accelerators; electrostatic accelerators; 3.5 MeV; DC electron beam; Fermilab electron cooler; MAG3D code; beam energy recovery; beam transport scheme; electron beam collector; electron trajectories; electrostatic acceleration; equipotential space; low back flow; low current loss; secondary electrons; stable performance; weak transverse magnetic field; Electron accelerators; Electron beams; Electronic mail; Laboratories; Magnetic fields; Narrowband; Performance loss; Permanent magnets; Solenoids; System testing;
Conference_Titel :
Vacuum Electronics Conference, 2002. IVEC 2002. Third IEEE International
Print_ISBN :
0-7803-7256-5
DOI :
10.1109/IVELEC.2002.999335
