Transverse Laser Cooling of Fast Ion Beams at the Storage Ring Tsr
نویسنده
چکیده
We review recent progress in laser cooling of fast stored ion beams at the Heidelberg Test Storage Ring, particularly concerning the development of methods to extend longitudinal laser cooling to the transverse degrees of freedom. EEcient three-dimensional cooling has been obtained on the basis of two diierent mechanisms leading to a transverse-longitudinal coupling: Storage-ring dispersion in combination with a transverse gradient of the cooling force leads to a single-particle motional coupling, whereas intrabeam Coulomb collisions result in a thermal relaxation between the diierent degrees of freedom. We discuss the importance of both transverse cooling mechanisms for attaining a crystalline ion beam.
منابع مشابه
Transverse Laser Cooling of a Radio-frequency Bunched Ion Beam in the Storage Ring Tsr
We report on the observation of the indirect transverse laser cooling eeect in a radio-frequency bunched beam of 7.3 MeV 9 Be + ions, stored in the Heidelberg Test Storage Ring and subject to direct longitudinal laser cooling. This bunched scheme ooers particular advantages for producing ultracold beams with unprecedented phase-space densities. The development of beam cooling techniques has eve...
متن کاملLongitudinal Dynamics of Laser-cooled Fast Ion Beams: Square-well Buckets, Space-charge Eeects, and Anomalous Beam Behaviour I Introduction Ii Laser Cooling at the Tsr a Longitudinal Laser Cooling
We present recent results of our experiments on laser cooling of fast stored ion beams at the Heidelberg Test Storage Ring. The longitudinal motion of the ions is directly cooled by the light pressure force, whereas eecient transverse cooling is obtained indirectly by longitudinal-transverse coupling mechanisms. Laser cooling in novel bunch forms consisting of square-well buckets leads to longi...
متن کاملGenerating ultralow-emittance ion beams in a storage ring.
Laser cooling of heavy-ion beams in a storage ring is systematically studied with a multiparticle simulation code where not only exact lattice characteristics and space-charge forces but also realistic laser-ion interactions can be incorporated. The resonant coupling method is applied in order to extend the powerful longitudinal photon pressure to the transverse degrees of freedom. It is shown ...
متن کاملCooling and heating of crystalline ion beams
The crystallization of ion beams has recently been established in the rf quadrupole storage ring PALLAS (PAul Laser CooLing Acceleration System) for laser-cooled 24Mg+ ion beams at an energy of about 1 eV. Yet, unexpectedly sharp constraints had to be met concerning the confinement strength and the longitudinal laser cooling rate. In this paper, related and up to now unseen heating mechanisms a...
متن کاملFrom laser cooling of non-relativistic to relativistic ion beams
Laser cooling of stored 24Mg ion beams recently led to the long anticipated experimental realization of Coulombordered ‘crystalline’ ion beams in the low-energy RF-quadrupole storage ring PAul Laser CooLing Acceleration System (Munich). Moreover, systematic studies revealed severe constraints on the cooling scheme and the storage ring lattice for the attainment and maintenance of the crystallin...
متن کامل