Electron Beam Suitable for Medium Energy Electron Cooling

Electron cooling of charged particle beams is a
well-established technique at electron energies of up
to 300 keV. However, until recently the advance of
electron cooling to the MeV-range energies remained a
purely theoretical possibility. In 2005 the electron
cooling project at Fermilab demonstrated the first
cooling of 8.9 GeV/c antiprotons in the Recycler
ring, and therefore, has proved the validity of the
idea of relativistic electron cooling. The
performance of the Recycler Electron Cooler (REC)
depends critically on the quality of electron beam. A
stable electron beam of 4.3 MeV carrying 0.5 A of DC
current is required. The beam suitable for the REC
must have an angular spread not exceeding 200 urad.
The full-scale prototype of the REC was designed,
built and tested at Fermilab to study the feasibility
of attaining the high-quality electron beam. In this
work we describe various aspects of development of
the Fermilab electron cooling system, and the
techniques used to obtain the electron beam suitable
for the cooling process.

Autorentext
Dr. Seletskiy received his PhD from the University of Rochesterin 2005. He pursued his graduate research in accelerator physicsat the Fermi National Accelerator Laboratory. After graduation hewas a postdoc at Stanford Linear Accelerator Center. He iscurrently a research scientist with the Brookhaven NationalLaboratory.

Klappentext
Electron cooling of charged particle beams is awell-established technique at electron energies of upto 300 keV. However, until recently the advance ofelectron cooling to the MeV-range energies remained apurely theoretical possibility. In 2005 the electroncooling project at Fermilab demonstrated the firstcooling of 8.9 GeV/c antiprotons in the Recyclerring, and therefore, has proved the validity of theidea of relativistic electron cooling. Theperformance of the Recycler Electron Cooler (REC) depends critically on the quality of electron beam. Astable electron beam of 4.3 MeV carrying 0.5 A of DCcurrent is required. The beam suitable for the RECmust have an angular spread not exceeding 200 urad.The full-scale prototype of the REC was designed,built and tested at Fermilab to study the feasibilityof attaining the high-quality electron beam. In thiswork we describe various aspects of development ofthe Fermilab electron cooling system, and thetechniques used to obtain the electron beam suitablefor the cooling process.