A click reaction (copper-catalyzed azide-alkyne cycloaddition) catalyzed by "naked" copper ions (without ligands) generated in situ from a copper substrate by laser ablation in a high-voltage assisted laser desorption/ionization (HALDI) ion source is demonstrated.

Calcium and lithium ion beams are required by NASA Space Radiation Laboratory at Brookhaven National Laboratory to simulate the effects of cosmic radiation. To identify the difficulties in providing such highly reactive materials as laser targets, both species were experimentally tested. Plate shaped lithium and calcium targets were fabricated to create ablation plasmas with a 6 ns 1064 nm neod...

Gas phase ion mobility measurements can resolve structural isomers for polyatomic ions and provide information about their geometries. A new experimental apparatus for performing high-resolution ion mobility measurements is described. The apparatus consists of a pulsed laser vaporization/desorption source coupled through an ion gate to a 63-cm-long drift tube. The ion gate is a critical compone...

The etching of silicon by a chlorine inductively coupled plasma ~ICP! was studied using laser desorption laser-induced fluorescence ~LD-LIF! analysis to determine the surface coverage of chlorine during steady-state etching. Laser interferometry was used to measure etch rates, and optical emission actinometry and Langmuir probe analysis were used to characterize the plasma. The ICP operated in ...

A frozen laser target that is in the gaseous phase at room temperature advantageous for a ion source because it can avoid accumulation of damage from irradiation by regeneration surface additional gas freezing. In this study, possibility forming xenon beam with current sufficient heavy-ion inertial fusion (HIF) was investigated. The relationship between growth and resulting analyzed to determin...

Cooling and acceleration of ions by lasers has gained increasing attention over the last years. The common interest is to further increase the luminosity of ion beams, either by shrinking the phase space occupied by the beam, or simply via increasing the number of particles. Recently, laser cooling has demonstrated ion beam crystallization as the ultimate reduction of the beam temperature. On t...