US2215787A - Apparatus for the production of rapidly moving ions - Google Patents

Apparatus for the production of rapidly moving ions Download PDF

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Publication number
US2215787A
US2215787A US222607A US22260738A US2215787A US 2215787 A US2215787 A US 2215787A US 222607 A US222607 A US 222607A US 22260738 A US22260738 A US 22260738A US 2215787 A US2215787 A US 2215787A
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United States
Prior art keywords
cathode
ions
diaphragm
anode
aperture
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Expired - Lifetime
Application number
US222607A
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English (en)
Inventor
Hailer Curt
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Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
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Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J27/00—Ion beam tubes
    • H01J27/02—Ion sources; Ion guns

Definitions

  • This invention relates to apparatus for the production of rapidly moving ions.
  • the gas-filled ionisation space generally constitutes a more or less pot-shaped anode and is separated from the highly evacuated space by a substantially discshaped cathode provided with an aperture for the passage ofthe ions.
  • the vacuum in the evacuated space must be constantly maintained by a pump. However, a good vacuum can only be produced when the gas in the ionisation space is prevented, as far as possible, from entering the evacuated space. There must, therefore, be a high resistance to gas flow during the passage of the ions through the cathode aperture. If it is desired to produce useful results in such known apparatus, the aperture in the cathode must not be made too small and accordingly a relatively long channel aperture must be used although this has been found to reduce the economy of the arrangement.
  • the main object of the present invention is to provide improved apparatus in which this disadvantage is avoided.
  • the anode enclosing the ionisation space has the side facing towards the cathode so shaped or so provided with additional diaphragm-like surfaces that the stream of ions is concentrated in the form of a beam before passing through the aperture or channel of a cold-type cathode diaphragm. It has been found that the yield of rapidly moving ions can in this way be considerably increased. However, the most important advantage of the focussing of the stream of ions is that the diameter of the cathode channel can be relatively small, so that sufiicient resistance to gas flow can be obtained with short channels.
  • the diameter of the channel is made equal to or greater than its axial length. This results in a considerable improvement in the economy of the arrangement, whilst the disadvantages of the known apparatus are overcome.
  • the arrangement shown in Fig. 1 has an anode l enclosed in an envelope l2 of insulating material, and a cathode 2 closing the envelope and provided with a cathode orifice 3 for connecting the gas chamber t within the anode with an evacuated chamber 5, the. evacuation of which. can be maintained by the exhaust pipe l5.
  • the 5 side of the anode i adjacent to the cathode constitutes a diaphragm 6 and is provided with an aperture l for the passage of the ions.
  • the stream of ions is concentrated into the form of a beam by the diaphragm-like part 6, so that it has 10 only a small cross-section and can without difficulty also pass through the narrow aperture 3 of the cathode.
  • the anode forming the diaphragm may have any other suitable shape, for example an anode 15 having a curved surface 8 as shown in Fig. 2 may be employed. It is also possible to separate the part which acts as a diaphragm from the actual anode and to impress thereon a'potential differing from the anode potential. Such an arrange ment is shown in Fig. 3 in which there is disposed between an anode .i and a cathode H] an insulated diaphragm ii, the potential of which may be higher or lower than the anode potential.
  • an envelope enclosing a highly evacuated space, an anode enclosing a gas-filled ionisation chamber, a cold-type cathode having a cathode diaphragm arranged so as to separate said ionisa- 30 tion chamber from said evacuated space, said cathode diaphragm having an aperture forming a passage for the ions, and at least one apertured diaphragm disposed between said ionisation chamber and said cathode diaphragm for con- 35 centrating the ion stream into a beam directed towards said aperture of said cathode diaphragm.
  • an envelope enclosing a highly evacuated space, an anode enclosing a gas-filled ionisation chamber and having an outlet opening for the emission of ions, a cold-type cathode consisting of a diaphragm separating said ionisation chamber from said evacuated space and having an aperture for the passage of the ions, an inter- 45 mediate diaphragm disposed between and insulated from said anode and said cathode, said intermediate diaphragm having an aperture arranged opposite said aperture of said cathode diaphragm for concentrating the stream of ions 5 emitted from said anode into a beam directed through said aperture of said cathode diaphragm,
  • a cold-type cathode forming a diaphragm separating said ionisation chamber from said evacuated space and having an aperture forming a passage for the ions, said aperture

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Particle Accelerators (AREA)
US222607A 1937-08-20 1938-08-02 Apparatus for the production of rapidly moving ions Expired - Lifetime US2215787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE516446X 1937-08-20

Publications (1)

Publication Number Publication Date
US2215787A true US2215787A (en) 1940-09-24

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ID=6549258

Family Applications (1)

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US222607A Expired - Lifetime US2215787A (en) 1937-08-20 1938-08-02 Apparatus for the production of rapidly moving ions

Country Status (5)

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US (1) US2215787A (en(2012))
BE (1) BE428578A (en(2012))
DK (1) DK56540C (en(2012))
FR (1) FR839213A (en(2012))
GB (1) GB516446A (en(2012))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934665A (en) * 1956-09-12 1960-04-26 Siemens Ag Ion source
US3157784A (en) * 1961-12-07 1964-11-17 Crosby Teletronics Corp Ion source for a mass spectrometer
US3263415A (en) * 1961-03-06 1966-08-02 Aerojet General Co Ion propulsion device
US3980044A (en) * 1972-03-06 1976-09-14 Balzers Patent Und Beteiligungs Ag Apparatus for depositing thin coats by vaporization under the simultaneous action of an ionized gas

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934665A (en) * 1956-09-12 1960-04-26 Siemens Ag Ion source
US3263415A (en) * 1961-03-06 1966-08-02 Aerojet General Co Ion propulsion device
US3157784A (en) * 1961-12-07 1964-11-17 Crosby Teletronics Corp Ion source for a mass spectrometer
US3980044A (en) * 1972-03-06 1976-09-14 Balzers Patent Und Beteiligungs Ag Apparatus for depositing thin coats by vaporization under the simultaneous action of an ionized gas

Also Published As

Publication number Publication date
FR839213A (fr) 1939-03-29
DK56540C (da) 1939-08-14
GB516446A (en) 1940-01-02
BE428578A (en(2012))

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