Measurements of Stability Limits for a Space-Charge-Dominated Ion Beam in a Long a. G. Transport Channel

Transport of a space-charge dominated electron beam in a short-quadrupole channel

“…1). (2) and (3). In the present case, a 0.74 cm (for s 0 85 ± ) and a max 1.13 cm, roughly equal to the radius of the fluorescent screen used for diagnostics in the matching experiments.…”

“…The present work reports on the first experiments related to the matching section; they provide the first benchtest results of the short printed-circuit (PC) quadrupole and the ring lattice designs. Experiments with spacecharge dominated beams elsewhere have used electrostatic quadrupoles to focus single or multiple beams [3]. To our knowledge, however, no beam transport experiments to date have employed quadrupoles as short as the ones intended for the Maryland ring.…”

Space-charge dominated beam transport in magnetic quadrupoles with large aperture ratios

“…6 in particular). From an experimental viewpoint, Tiefenback's [7][8] work with SBTE showed unstable beam envelope growth for u 0 ? : 88° at low values of u.…”

Induction Linacs for Heavy-Ion Fusion

“…Since the IEEE Particle Accelerator Conference in Vancouver in May 1985, the results on high-current beam transport limits [Tiefenback and Keefe (1985) • Earlier theoretical work on beam current limits in AG focussing systems utilizing an idealized distribution (the Kapchinskij-Vladimirskij or K-V) indicated that it could be dangerous to use a greater than 60°, o and that a could probably be depressed from that value down to 24°, but not below [Hofmann et al (1983)]. The experimental limits from SBTE shown in Table 1 can be seen to be much more encouraging.…”