3 research outputs found
A storage ring for crystalline beam studies
The possibility of generating crystallized ion beams, i.e. beams whose particles are located at fixed positions, has always excited the interest of most people working on particle accelerators. The reason of this interest has many aspects: knowledge either of a completely new research field or of some of the applicative potentialities, connected with crystalline beams, would justify a careful investigation of this subject.
After the successful exploitation of electron cooling in several heavy ion storage rings the possibility of generating crystalline ion beams became more realistic. New cooling methods, like laser cooling, give a further opportunity to reach an ultracold system of particles necessary for the state transition to the crystalline configuration.
The conceptual design of a low-energy heavy-ion storage ring, called CRYSTAL, proposed for the experimental demonstration of crystalline beams at Legnaro Laboratories is presented. The physics of crystalline beams as well as the main criteria to design a storage ring suitable to crystallize ion beams are discussed. The effects of instabilities for space charge dominated beams, shear forces in dipole magnets and lattice periodicity breaking are also discussed in detail
The Legnaro CRYSTAL proposal
The conceptual design of a low-energy heavy-ion storage ring, called CRYSTAL, proposed for the experimental demonstration of Crystalline Beams is presented. The design of the project has been optimized for the study of crystalline beams; bru provisions have also been made for carrying out experiments for different nature in nuclear, atomic and molecular physics. The tandel-ALPI heavy-ion facilities of the Laboratori Nazionali di Legnaro is assumed as the injector for the storage ring. For the Crystalline mode the possibility to inject particles from an indipendent low energy source is also considered. The storage ring has a circumference of 70 m, large enough to allow a maximum magnetic rigidity of 3.8 Tm. It has a periodicity of eight, made of eight dipole magnets surrounded by doublet quadrupoles, sextupoles and a drift space free of magnets 3.4 m long.
The demonstration of Crystalline beams is feasible with very effective electron and laser cooling and requires dedicated diagnostics.
The existence of stable ground state for Crystalline Beams has been demonstrated by computer simulations. The basixc structures are the helices and twisted multiplets. The ground state configurations depend on the focusing parameters of the storage ring. The transition thresholds from one ground state to another depends on the focusing parameters and particles density
The crystal storage ring project at Legnaro
We present a study on a storage ring dedicated to ion beam
crystallization. Lattice has been designed in order to reduce
the phenomena acting against the cooling such as intra-beam
scattering and envelope instabilies. Computer simulatious
show different kinds of crystaline structures and some new
features related to shear effect