0000000000718010

AUTHOR

Xinwen Ma

showing 2 related works from this author

Optical measurement of the longitudinal ion distribution of bunched ion beams in the ESR

2013

Abstract An optical technique to study the longitudinal distribution of ions in a bunched ion beam circulating in a storage ring is presented. It is based on the arrival-time analysis of photons emitted after collisional excitation of residual gas molecules. The beam-induced fluorescence was investigated in the ultraviolet regime with a channeltron and in the visible region using a photomultiplier tube. Both were applied to investigate the longitudinal shape of bunched and electron-cooled 209Bi80+ ion beams at about 400 MeV/u in the experimental storage ring (ESR) at GSI Helmholtzzentrum fur Schwerionenforschung in Darmstadt, Germany. Bunch lengths were determined with an uncertainty of abo…

PhysicsNuclear and High Energy PhysicsPhotomultiplierPhotonIon beamIonizationPhysics::Accelerator PhysicsAtomic physicsInstrumentationCollisional excitationBeam (structure)Storage ringIonNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
researchProduct

Laser cooling of stored relativistic ion beams with large momentum spreads using a laser system with a wide scanning range

2014

New results on laser cooling of stored, bunched, relativistic ion beams are presented. For the first time it has been possible to cool an ion beam with large momentum spread without initial electron cooling or scanning of the bunching frequency by using a single cw laser system.

PhysicsHistoryRange (particle radiation)Ion beamResolved sideband coolingbusiness.industryLaserComputer Science ApplicationsEducationIonlaw.inventionMomentumOpticslawLaser coolingPhysics::Accelerator PhysicsPhysics::Atomic PhysicsAtomic physicsbusinessElectron coolingJournal of Physics: Conference Series
researchProduct