Chronology of Milestone Events in Particle Physics - BUDKER 1976
Chronology of Milestone Events in Particle Physics

BUDKER 1976

Budker, G.I.; Dikansky, N.S.; Kudelainen, V.I.; Meshkov, I.N.; Parchomchuk, V.V.; Pestrikov, D.V.; Skrinsky, A.N.; Sukhina, B.N.;
Experimental Studies of Electron Cooling
PAAC 7, 197 (1976);

Abstracts
Input of a beam of "cool'' electrons into a straight-section orbit of a heavy charged-particle beam circulating in a storage ring introduces an effective friction when the velocities of heavy particles and electrons coincidence magnitude and direction. This friction causes the phase-space volume of the heavy-particle beam to decrease -"electron cooling''.
In the work presented here, an experimental study was made of electron cooling of a beam of 35-80 MeV protons. A study was made of the electron-cooling effect on the proton lifetime in the storage ring. At a proton energy of 65 MeV and electron current of 100 mA, the betatron-oscillation damping time was obtained and the equilibrium proton-beam dimensions were measured to be: diameter < 0.8 mm, angular spread < 4 x 10-5. Damping-time dependence on the parameters was also studied. The problem of the equilibrium value of the proton momentum spread is considered, and its experimental value is measured to be: (p)/p < 1 x 10-5.
A detailed description is given of methods for measurement of the proton-beam apertures. Some possible applications of the electron-cooling methods are described.

Related references
More (earlier) information appears in
G. I. Budker et al., Atomic Energy. USSR. 40 (1976) 1;
G. I. Budker et al., IEEE Transactions on Nucl. Sci. NS-20 (1975) 2093;
G. I. Budker et al., Atomic Energy. USSR. 40 (1976) 49;
See also
P. Bramhan et al., Nucl. Instr. and Meth. 125 (1975) 201;
B. Vosicki and K. Zankel, IEEE Transactions on Nucl. Sci. NS-22 (1975) 1475;
A. A. Kolomensky and A. N. Lebedev, Cyclic Accelerator Theory, Fizmatgiz (1962);
C. van der Meer, preprint CERN-ISR-72-31 (1975);
B. A. Trubnikov, Problems of Plasma Theory, Ed. I.M. (1963);
G. I. Budker, Proc. Intern. Symp. on Electron and Positron Storage Rings, Saclay (1966) 11-1-1;
C. van der Meer, preprint CERN-ISR-70-5 (1970);

Record comments
Evidence for electron cooling.
    
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