6533b7d2fe1ef96bd125ebe3

RESEARCH PRODUCT

Bunching and cooling of radioactive ions with REXTRAP

Friedhelm AmesP. SchmidtK. ReisingerGeorg BollenDietrich BeckG. HuberO. ForstnerDietrich Habs

subject

PhysicsNuclear and High Energy PhysicsRange (particle radiation)Large Hadron ColliderIon beamChemistryParticle acceleratorIon gunPenning trapAccelerators and Storage RingsLinear particle acceleratorIon sourcePulse (physics)law.inventionIonNuclear physicsIon beam depositionPhysics::Plasma PhysicslawPhysics::Accelerator PhysicsPhysics::Atomic PhysicsIon trapAtomic physicsNuclear ExperimentBeam (structure)

description

The properties of radioactive ion beams produced by the present on-line target ion source technology are often not suitable for direct post acceleration. For that purpose pulsed and cooled beams of higher charged ions are required. In the case of REX-ISOLDE, the post accelerator at the CERN-ISOLDE radioactive beam facility, a unique system for beam preparation is used. It consists of a gas-filled cylindrical Penning trap (REXTRAP) for bunching and cooling followed by an electron beam ion source for charge state breeding. The Penning trap has been successfully operated with an efficiency of up to 40% and a total number of up to 107 ions stored. Buffer-gas sideband cooling at the ions’ cyclotron frequency is employed for centering of the ions in the trap. Space charge effects have been observed if more than 105 ions are stored. The main effects are frequency shifts for the centering frequency. They can not be explained by simple single ion trap theory, but can be reproduced in simulations.

yearjournalcountryeditionlanguage
2002-04-01
10.1063/1.1454338http://cds.cern.ch/record/516177