With the increase in applications of heavy ions in various fields, the production of intense beams of highly charged heavy ions from ion sources become more and more important. For example, the ion sources are required to produce intense dc beams of highly charged heavy ions for accelerator facilities for radioisotope beam production, and intense short-pulsed beams for injection into synchrotro...

The electron beam induced current (EBIC) technique was used to characterize a 32 lm thick hydrogenated amorphous silicon n–i–p diode deposited on top of an ASIC, containing several channels of active feedback pre-amplifiers (AFP) with peaking time of 5 ns. The homogeneity of the sample together with the edge effects induced by the unevenness of the ASIC substrate were studied with low doses of ...

This paper reports on the development of a new experiment for the study of electron-impact induced dissociation and fragmentation of molecular clusters and biomolecules and other species solvated in water clusters. The purpose is to look at clusters that are of interest to biophysics, atmospheric physics, and other fields. The experiment consists of a differentially pumped vacuum system, with a...

A SPIRE-300 pulsed electron beam processor has been used t o recrystallize (100) and (111) 15 Si wafers implanted with As (140 keV 10 cm-2). The machine parameters have been selected t o obtain an electron energy deposition profik convenient for melting of the silicon surface 2 down t o 1 J/cm . The best regrawth layer quality and As incorporation wereobtained with electron energy densities in ...

The Magnetron is one of the efficiency high-power microwave source, although the energy conversion efficiency decreases with pulsed-power relativistic electron beam. We study the capability to increase energy conversion efficiency of Relativistic Magnetron by using Transparent Cathode. The Transparent-Cathode consists of independent cathode strips. Each cathode strip caused azimuthal magnetic f...

To investigate the space charge neutralization effects in the extraction gap of a laser ion source (LIS) [1] a high current density electron beam with low energy spread is needed. The transient hollow-cathode discharge (THCD) source [2] has the required characteristics. The THCD is a pulsed hollow-cathode glow discharge that operates at low gas pressure (101 mbar) and high applied voltage. Char...

For the generation of picosecond (< 100 ps) electron beam pulses, we studied the RF modulation of a conventional triode electron gun. The feasibility study for this scheme has been experimentally investigated by modulating a triode gun of the Y-824 cathode-grid (KG) structure provided by the CPI Eimac, with 2.856-GHz pulsed RF’s generated by a solid-state amplifier (SSA). In this paper, we pres...

A laser ion source (LIS) has been designed and successfully tested for loading the Heidelberg electron beam ion trap (H-EBIT) with ions of practically all solid-state elements. A pulsed YAG:Nd laser (30 mJ, 8 ns) is used to produce plasma from a solid target. Lowly charged ions are extracted from the plasma and accelerated by a short high-voltage pulse, generating a pulsed ion beam with energy ...

A Mourre-type estimate is derived for the pseudorelativistic Brown–Ravenhall operator describing an atomic electron in a specific magnetic field of constant direction. As a consequence it is shown that its point spectrum is finite in R\{m} if the Coulomb potential strength γ is below 2 . An extension of the Mourre-type estimate to the exact block-diagonalized Dirac operator is also discussed. P...