Apparatus for measuring electron-impact excitation cross sections using fast metastable atoms

Boffard, John B.; Lagus, Mark E.; Anderson, L.W.; Lin, Chun C.
August 1996
Review of Scientific Instruments;Aug1996, Vol. 67 Issue 8, p2738
Academic Journal
Describes an apparatus for measuring absolute cross sections due to electron-impact excitation out of the metastable levels of rare-gas atoms via the optical method focused specifically on excitation out of the 23S metastable helium level. Preparation of metastable helium target by charge exchange between 1.6 keV Helium ions and cesium vapor.


Related Articles

  • Acumar� Technology Launches Innovative Digital Inclinometer.  // American Chiropractor;2003, Vol. 25 Issue 1, p11 

    Reports on the launch of the Digital Inclinometer product line by the U.S.-based company, Acumar Technology Co. which provides accuracy, repeatability and objective documentation of a range of motion measurements. Features; Specifications; Price.

  • Laboratory Fluorinated By-products Analyser.  // Petro Industry News;2011, Vol. 12 Issue 1, p25 

    A preview of FBA 5320, a laboratory fluorinated by-products analyser for detecting and measuring total fluorinated contaminants from the hydrofluoric alkylation is presented.

  • A system for measurement of sub-parts-per-trillion helium in solids. Takao, Y.; Kanda, Y. // Review of Scientific Instruments;Jan1996, Vol. 67 Issue 1, p198 

    Describes an apparatus for measuring neutron-induced helium production cross sections. Measurement of less than 1 parts per trillion of helium contained within the range of mass between 100 milligram and 1 gram; Estimation of suitable parameters for the given experimental conditions; Use of a...

  • Space and time resolved temperature measurements in laser pulse-produced metal melts. Otte, D.; Kleinschmidt, H.; Bostanjoglo, O. // Review of Scientific Instruments;Jun97, Vol. 68 Issue 6, p2534 

    Describes a fast broadband pyrometer in temperature, and a calibration method suitable for liquid metals. Time resolution of temperature measurements; Application of the pyrometer to determine the temperature of melts produced by focused nanosecond laser pulses in gold and iron films.

  • Micronic-size cryogenic thermometer for turbulence measurements. Chanal, O.; Baguenard, B.; Bethoux, O.; Chabaud, B. // Review of Scientific Instruments;Jun97, Vol. 68 Issue 6, p2442 

    Describes the development and testing of micronic-size thermometers designed for local measurements in turbulent gaseous helium. Thermometer fabrication; Au-Ge thin films behavior; Static and dynamic characterizations.

  • Improved apparatus and procedures for isopiestic studies at elevated temperatures. Hefter, Glenn; May, Peter M.; Marshall, Simon L.; Cornish, John; Kron, Ivan // Review of Scientific Instruments;Jun97, Vol. 68 Issue 6, p2558 

    Describes a significantly improved apparatus for the isopiestic measurement of thermodynamic activities at elevated temperatures. Details of the design; Analysis of the propagation of the experimental errors; Testing of the apparatus by measurements of calcium chloride against sodium chloride.

  • Stepped piston modification in the piston manometer of mixed operational principle (simple-piston and re-entrant cylinder system). Urban´ski, Michał K.; Wis´niewski, Roland // Review of Scientific Instruments;Apr2002, Vol. 73 Issue 4, p1924 

    The optimization of mixed-principle operation pressure balance consisting of two parts: simple-piston and re-entrant cylinder units is reported. The maximum high pressure corrections for low pressure effective area of the system can be reduced by 50%. The solution was obtained by application of...

  • Note: A versatile, stable, high-resolution readout system for RTD and thermistor sensors. Ambrosetti, R.; Matteoli, E.; Ricci, D. // Review of Scientific Instruments;Sep2012, Vol. 83 Issue 9, p096101 

    A readout system for resistance temperature detectors and thermistors is described featuring temperature resolution better than 1 mK and capability to fit sensors having different resistance or requiring different excitation current. For instance, with a sensor equivalent to an ideal 100 Ω...

  • Calibrating temperature instruments.  // Process & Control Engineering (PACE);Dec2011, Vol. 64 Issue 11, p18 

    The article offers tips on how to calibrate temperature instruments. It states that temperature sensor must be inserted into a known temperature and must be calibrated using temperature dry blocks for industrial field or liquid baths. It notes that the accuracy of the sensors at the same...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics