High Current Heavy Ion Beam Transport in Magnetic Quadrupoles
Abstract
The High Current Experiment (HCX) is exploring heavy-ion beam transport in an alternating gradient quadrupole focusing channel at a scale representative of the low-energy end of an induction linac driver for fusion energy production. A primary mission of this experiment is to investigate aperture fill factors (F = diameter of maximum beam excursion / aperture diameter) acceptable for the transport of space-charge dominated heavy-ion beams at high space-charge intensity (line-charge density ∼ 0.2 microC/m) over long pulse durations (> 4 microsec). We present the phase space evolution of a K+ ion beam transported (F>0.5) through 4 magnetic quadrupoles. Transverse phase space is measured including particle loss from beam halo. Upstream phase space measurements constrain beam parameters and are used to initialize simulations. The consequences for beam control and fill-factors in longer lattice experiments will be discussed.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- November 2004
- Bibcode:
- 2004APS..DPPCP1115S