Arc Discharge Source Research Articles

Simplified cascaded arc discharge source for production of a processing plasma

A simplified cascaded arc discharge source is proposed as one possibility for plasma processing. While decreasing the number of floating electrodes which constrict the arc channel, the plasma parameters remain almost unchanged. The device was found to produce very low electron temperature (∼0.5 eV) plasma, preventing damage on a substrate by high energy ions which might be accelerated in an ion sheath, with high density (∼1012 cm−3). This device is expected to be applied to new fields of plasma processing requiring low electron temperature.

High growth ratein situ preparation of Y1Ba2Cu3O7?x films by a new co-evaporation method using an arc-discharge plasma source

The objective of this study was to apply this highly dense plasma evaporation (HDPE) process to prepare high quality YBa 2 Cu 3 O 7-δ films at high growth rate

Design and operation of a stable intense high-temperature arc-discharge source of hydrogen atoms and metastable trihydrogen molecules

We report a design for a stable intense beam source of hyperthermal hydrogen atoms. The basis for the design is an arc heater used first by Knuth for the generation of high-translational energy He–Ar beams. In the case of hydrogen atom generation this source is very unstable due to the corresponding higher temperatures which are generated by the plasma discharge. We have substantially eliminated these difficulties by the insertion of discharge-localizing insulators and the use of a tungsten nozzle mounted in the center of a 1-kG electromagnet. This source generates exceptionally high hydrogen atom beam intensities of ∼1022 atoms s−1 sr−1 with translational energy distribution functions which extend to 18 eV and whose peak occurs at energies as high as 13 eV. In addition metastable H3 molecules having an intensity between 1020 and 1021 molecules s−1 sr−1 are formed.

A preparation method of long-lived carbon stripper foils for heavy ions

We have found a preparation method of long-lived carbon foils 10 μ g/cm 2 thick for heavy ion strippers of tandem electrostatic accelerators. The lifetimes were 5–10 h under bombardment by 3.5 MeV Ar + beams with an intensity of 1 μ A/13 mm 2 . The carbon foils were made by using an arc-discharge evaporation source and a nickel chloride releasing agent which was evaporated on to a specially prepared glass slide at 300 °C. These foils showed a slow shrinkage in the irradiated area and a gradual elongation in the peripheral area.

Light Sources in the 015–20-μ Spectral Range

The different kinds of light sources available for the 0.15-20-micro spectral range are surveyed. Information was obtained from the published literature, unpublished reports, light source manufacturers, and also from individual persons. The aim has been to present sufficient information, where available, to show the relative advantages of different sources-intensity, stability, and output uniformity were of prime interest. Continuum and line sources are included but lasers and pulsed sources are omitted. The sources are described under the main headings: Arc Discharge Sources, Glow Discharge Sources, and Incandescent Sources, with another section, Miscellaneous Sources, to cover some which could not be included under the first three headings.