Tjp. Ellison, ELECTRON COOLING OF HIGH-ENERGY ION-BEAMS IN RHIC AND OTHER FACILITIES, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 364(1), 1995, pp. 27-32
A two-stage Pelletron intermediate energy electron cooling system coul
d cool the 100 GeV/nucleon Au-197(79+) beams to be stored in RHIC, the
Relativistic Heavy Ion Collider under construction at the Brookhaven
National Laboratory, in less than 300 s - 100 times faster than the st
ate of the art stochastic cooling systems that are being proposed. Aft
er the beam transverse emittance and longitudinal momentum spread are
reduced by initial cooling, the electron cooling time would be further
reduced by up to a factor of 3, whereas the stochastic cooling time w
ould increase. The electron cooling time varies in proportion to gamma
(2) whereas the stochastic cooling time is approximately independent o
f the beam energy; thus the electron cooling system performance is eve
n more impressive at lower energies. The parameters for such a system
are presented along with the status of the technology necessary to bui
ld such a system. The application of this technology to other existing
or proposed lower-energy machines is also briefly reviewed.