Diagnostic of the ion beam profile is a very important part of the any heavy ion beam experiment. Usually, scintillators are used for these purposes. In the HHT-experimental area of GSI, uranium beams of up to 4,5·10 particle per bunch focused in the spot side of 0,8mm x 1,6mm are used [1]. The ion beam of such intensity is capable to destroy any usual scintillator by one shot. In this case, a ...

The energetics of ions trapped in an Electron Beam Ion Trap is reviewed, with particular reference to axial escape of the ions. Measurement of temperature as a machine diagnostic is illustrated. Control of the escape rate is shown to be an effective way to produce ultra-cold highly charged ions and to drive the ions through a phase transition. The nature of this phase transition, particular to ...

A new luminescence beam profile monitor is realized in the polarized hydrogen gas jet target at the Relativistic Heavy Ion Collider (RHIC) facility. In addition to the spin polarization of the proton beam being routinely measured by the hydrogen gas jet, the luminescence produced by beam-hydrogen excitation leads to a strong Balmer series lines emission. A selected hydrogen Balmer line is spect...

This paper studies the influence of various parameters and conditions on the performance of an ion-beam extraction system, the trajectories of the particles in the beam being simulated by a commercial software (SIMION 3D). Space-charge effects are accounted for and criteria allowing optimization of the system are proposed. Ion beam trajectories with and without space charge have been determined...

The Heavy Ion Fusion Group at Lawrence Livermore National Laboratory has for several years been developing the world’s first circular ion induction accelerator designed to transport space charge dominated beams. Currently, the machine extends to 90 degrees, or 10 half-lattice periods(HLP) with induction cores for acceleration placed on every other HLP. Full current transport with acceptable emi...

We describe a technique for studying scattering from subwavelength features. A simple scatterometer was developed to measure the scattering from the single-submicrometer, subwavelength features generated with a focused ion beam system. A model that can describe diffraction from subwavelength features with arbitrary profiles is also presented and shown to agree quite well with the experimental m...

Background: The compositions of Ferrous sulphate, Agarose and Xylenol orange dye (FAX) and Ferrous sulphate, Gelatin and Xylenol orange dye (FGX) in solution of distilled water and sulphuric acid are two tissue-equivalent gel dosimeters. Ionizing radiation causes oxidation of Fe2+ ion to Fe3+ ions which diffuse through the gel matrix and blur the image of absorbed dose over a period of hours af...

Recent years have seen a great potential of the focused ion beam (FIB) technology for the nanometer-scale patterning of a freestanding two-dimensional (2D) layer. Experimentally determined sputtering yields of the perforation process can be quantitatively explained using the binary collision theory. The main peculiarity of the interaction between the ion beams and the suspended 2D material lies...