Title :
A Quadrupole Beam Transport Experiment for Heavy Ions under Extreme Space Charge Conditions
Author :
Chupp, W. ; Faltens, A. ; Hartwig, E.C. ; Keefe, D. ; Kim, C.H. ; Laslett, L.J. ; Nemetz, R. ; Pike, C. ; Rosenblum, S.S. ; Shiloh, J. ; Smith, L. ; Tiefenback, M. ; Vanecek, D.
Author_Institution :
Lawrence Berkeley Laboratory University of California Berkeley, California 94720
Abstract :
A Cs ion-beam transport experiment is in progress to study beam behavior under extreme space charge conditions. A five-lens section matches the beam into a periodic electrostatic quadrupole FODO channel and its behavior is found to agree with predictions. With the available parameters (¿200 keV, ¿20 mA, ¿¿n ¿ 10-7 ¿ rad-m, up to 41 periods) the transverse (betatron) oscillation frequency (¿) can be depressed down to one-tenth of its zero current value (¿o), where ¿2 = ¿2o - ¿2p/2, and ¿p is the beam plasma frequency. The current can be controlled by adjustment of the gun and the emittance can be controlled independently by means of a set of charged grids.
Keywords :
Costs; Current density; Electrostatics; Frequency; Laboratories; Optical beams; Particle beams; Physics; Plasma transport processes; Space charge;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1983.4332877
