Instrumentation for the Continuous Measurement of Certain Ionospheric Echo Characteristics
A method is described for continuously measuring the polarization and other parameters of radio pulse echoes reflected from the ionosphere in very compact form. Time-varied intensity modulation is emp...
A method is described for continuously measuring the polarization and other parameters of radio pulse echoes reflected from the ionosphere in very compact form. Time-varied intensity modulation is emp...
Automatic Isodose Recorder
An apparatus is described which compares the signals developed by two detectors. An application is the measurement and plotting of the distribution of radiation energy produced by x-ray generators. Me...
An apparatus is described which compares the signals developed by two detectors. An application is the measurement and plotting of the distribution of radiation energy produced by x-ray generators. Me...
New Time-of-Flight Mass Spectrometer
Rev. Sci. Instrum. 26, 324 (1955); doi:10.1063/1.1771290
Issue Date: April 1955
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A time-of-flight mass spectrometer based on principles previously described has been constructed with two major modifications to facilitate appearance potential measurements. These modifications are (1) an axial electron beam is pulsed through an ionization chamber utilizing techniques of Fox, et al., and (2) a gated ion detector is employed to allow for integration of the resolved ion current from successive cycles. The instrument has been constructed of stainless steel to allow for measurements on chemically active gases. Theoretical resolution, limited by thermal energies of the ions, appears to be well over mass 200. Preliminary experimental work has verified this up to the region of mass 100. Ionization potentials, using the difference method, have been obtained from various gases that are in agreement with the spectroscopic data to within 0.05 volts.
Review of Scientific Instruments is copyrighted by The American Institute of Physics.
| History: | Received May 18, 1954; revised September 13, 1954 |
| Permalink: |
http://link.aip.org/link/?RSINAK/26/324/1 |
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REFERENCES (5)
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- Fox, Hickam, Kjeldaas, and Grove,
Phys. Rev. 84, 859 (1951) . - A. E. Cameron and D. F. Eggers, Jr., Rev. Sci. Instr. 19, 605 (1948).
- M. M. Wolff and W. E. Stephens, Rev. Sci. Instr. 24, 616 (1953).
- H. D. Hagstrum,
Revs. Modern Phys. 23, 185 (1951) . - W. H. Bennett, J. Appl. Phys. 21, 143 (1950).
