200 research outputs found
Concept for controlled transverse emittance transfer within a linac ion beam
For injection of beams into circular machines with different horizontal and
vertical emittance acceptance, the injection efficiency can be increased if
these beams are flat, i.e. if they feature unequal transverse emittances.
Generation of flat electron beams is well known and has been demonstrated
already in beam experiments. It was proposed also for ion beams that were
generated in an Electron Cyclotron-Resonance (ECR) source. We introduce an
extension of the method to beams that underwent charge state stripping without
requiring their generation inside an ECR source. Results from multi-particle
simulations are presented to demonstrate the validity of the method.Comment: 23 pages (preprint style), 14 Figures, submitted to PRST-A
Rotating system for four-dimensional transverse rms-emittance measurements
Knowledge of the transverse four-dimensional beam rms-parameters is essential
for applications that involve lattice elements that couple the two transverse
degrees of freedom (planes). Of special interest is the removal of inter-plane
correlations to reduce the projected emittances. A dedicated ROtating System
for Emittance measurements (ROSE) has been proposed, developed, and
successfully commissioned to fully determine the four-dimensional beam matrix.
This device has been used at the High Charge injector (HLI) at GSI using a beam
line which is composed of a skew quadrupole triplet, a normal quadrupole
doublet, and ROSE. Mathematical algorithms, measurements, and results for ion
beams of 83Kr13+ at 1.4 MeV/u are reported in this paper.Comment: 11 pages, 10 figure
Optimization of an ih-cavity based high energy heavy-ion LINAC at GSI
A new high energy heavy-ion injector (HE-Linac) for the FAIR project was proposedas replacement for the existing post-stripper linac at the GSI UNILAC. Six 108 MHz IH-type drift-tube linac cavities within a total length of about 24m accelerate the ions (up to U28+) from1.4 MeV/u up to 11.4 MeV/u. Fast pulsed quadrupole triplet lenses are used for transverse focusing in between the IH cavities. The optimization of the HE linac with respect to the emittance growth reductionis investigated
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