An electrostatic electron energy analyser for 3-20 keV electrons

Hale, D.; Allen, Wesley D.

doi:10.1088/0022-3735/4/4/015

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…The presence of the magnetic field automatically excludes the use of electrostatic deflection spectrometers (see, e.g. Schmitz and Mehlhorn 1972, Risley 1972, Hale and Allen 1971 as the successful operation of these devices demands that the deflection system be completely screened from any ambient magnetic field. A magnetic field is, however, necessary for the operation of a trochoidal monochromator which makes this type of spectrometer ideal for the situation described here in which the instrument is totally immersed in an extension of the plasma machine's axial magnetic field.…”

Section: Introductionmentioning

confidence: 99%

A two-dimensional velocity analyser for electrons produced in laboratory plasma experiments

Bond

Gough

1981

J. Phys. D: Appl. Phys.

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A two-dimensional velocity analyser is described, for use in laboratory plasmas with an axial magnetic field. An applied electric field, perpendicular to the magnetic field, preferentially selects electrons depending on their initial parallel (axial) velocity component. Subsequent sampling of the selected electrons with a retarding potential analyser, in a region of reduced magnetic field, enables the authors to determine both perpendicular and parallel velocity components of the electrons. The characteristics of the instrument are discussed and measurements made with the prototype instrument are compared with the results from a computer simulation. Some applications of this instrument as a diagnostic tool for use with laboratory plasmas are given.

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Section: Introductionmentioning

confidence: 99%

A two-dimensional velocity analyser for electrons produced in laboratory plasma experiments

Bond

Gough

1981

J. Phys. D: Appl. Phys.

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“…The EIA consists of two curved parallel plates held at different potentials and a radial cylindrical design with a deflection angle that varies depending on the application. A total deflection angle of 127 o is often used in energy analysis because this angle allows an ion beam focused onto the entrance slit to be also focused onto the exit slit, improving ion transmission through the EIA [41]. The EIA operated with TOF detection of MCIs allows E/z ratio and z to be identified independently.…”

Section: 4electrostatic Ion Analyzermentioning

confidence: 99%

Transport line for laser multicharged ion source

Shaim

Rahman

Balki

et al. 2017

Vacuum

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The components of a transport line for a laser multicharged ion source are described. Aluminum and carbon multicharged ions are generated by a Q-switched, nanosecond Nd:YAG laser (wavelength λ = 1064 nm, pulse width τ = 7.4 ns, and pulse energy up to 82 mJ) ablation of a target in a vacuum chamber. Time-of-flight and a three-grid retarding ion energy analyzers are used to determine the velocity and the charge state of the ions. A three-electrode cylindrical einzel lens is used to focus the ions. At a distance of 30 cm from the center of the focusing electrode of the einzel lens, Al 1+ and Al 2+ have a minimum beam diameter of ~1.5 mm, while for Al 3+ and Al 4+ the minimum beam diameter is ~2.5 mm. The Simulation of the ion trajectories is done using SIMION 8.1. A high voltage pulse applied to a set of two parallel deflecting plates is used for the pickup of ions with different charge states according to their time-of-flight. An electrostatic cylindrical ion deflector is used for analysis and selection of charges with specific 1

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