WO2006028406A1 - Procede pour produire des ions negatifs - Google Patents

Procede pour produire des ions negatifs Download PDF

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Publication number
WO2006028406A1
WO2006028406A1 PCT/RU2005/000433 RU2005000433W WO2006028406A1 WO 2006028406 A1 WO2006028406 A1 WO 2006028406A1 RU 2005000433 W RU2005000433 W RU 2005000433W WO 2006028406 A1 WO2006028406 A1 WO 2006028406A1
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WO
WIPO (PCT)
Prior art keywords
negative ions
electromagnetic
electrons
electromagnetic radiation
producing negative
Prior art date
Application number
PCT/RU2005/000433
Other languages
English (en)
Russian (ru)
Inventor
Boris Abramovich Zon
Original Assignee
Boris Abramovich Zon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boris Abramovich Zon filed Critical Boris Abramovich Zon
Publication of WO2006028406A1 publication Critical patent/WO2006028406A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/32—Gas-filled discharge tubes
    • H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
    • H01J37/32082—Radio frequency generated discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T23/00—Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere

Definitions

  • the invention relates to atomic and molecular physics and may be useful for detecting molecules of explosive or toxic substances in air, as well as for scientific research with negative ions.
  • Atomic and molecular negative ions are formed as a result of various elementary processes in a low-temperature plasma, such as: inelastic scattering of an electron by a molecule, accompanied by its dissociation, inelastic scattering of an electron by an atom, accompanied by the excitation of self-detached states, collision of three particles, photo-adhesion, etc. [B. M. Smirnov. Atomic collisions and elementary processes in plasma. M. Atomizdat, 1968; G. Messi. Negative ions. M. Mir, 1979].
  • the disadvantage of these methods is the lack of selectivity, namely, the inability to obtain negative ions of certain atoms or molecules that are in a gas in low concentration.
  • the circuit diagram of the installation for producing negative ions is as follows.
  • a gas medium containing the atoms or molecules under study is simultaneously irradiated with a pulsed beam of quasimonokinetic electrons having an average kinetic energy E and an electromagnetic pulse of approximately the same duration.
  • the carrier frequency of the electromagnetic pulse v and energy E are related by the relation: hv + ⁇ «E.
  • negative ions are formed due to stimulated photo-adhesion.
  • the directions of propagation of electromagnetic radiation and its polarization relative to the direction of propagation of electrons can be arbitrary. The latter circumstance is significant, since during the propagation of electrons in a gaseous medium, their velocities can change their direction due to scattering processes.
  • the optimal duration of the electronic and electromagnetic pulses T is determined by the condition: ⁇ "1 " / ⁇ v, where n is the electron density in the beam, ⁇ is the cross section for the destruction of a negative ion in a collision with an electron, and v is the average electron velocity.
  • SUBSTITUTE SHEET (RULE 26) radiation "0.25 cm ⁇ ] . If in this case the non-monokineticity of electrons is determined by thermal effects (at room temperature “0.025 eV), then at ⁇ “ 0.1 eV one negative ion of about 10 7 neutral atoms or molecules is formed in one cubic centimeter of the gas medium per pulse.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention appartient au domaine de la physique atomique et moléculaire et peut s'utiliser pour détecter dans l'air des molécules de substances toxiques ou explosives ainsi que pour produire des faisceaux d'ions négatifs destinés à la recherche scientifique. L'invention concerne un procédé pour produire des ions négatifs, qui consiste à irradier par une impulsion de rayonnement électromagnétique quasimonochrome un faisceau d'impulsions d'électrons quasimonocinétiques se propageant dans un milieu gazeux. Les durées de l'impulsion électromagnétique et de l'impulsion d'électrons doivent se rapprocher l'une de l'autre. La fréquence requise du rayonnement électromagnétique dépend de l'énergie cinétique des électrons dans le faisceau et de l'énergie de liaison de l'ion négatif. Cela permet d'assurer la sélectivité du procédé et la possibilité d'obtenir des ions négatifs bien définis d'atomes ou de molécules dont la concentration dans le milieu gazeux peut être faible.
PCT/RU2005/000433 2004-09-03 2005-08-25 Procede pour produire des ions negatifs WO2006028406A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2004126495 2004-09-03
RU2004126495 2004-09-03

Publications (1)

Publication Number Publication Date
WO2006028406A1 true WO2006028406A1 (fr) 2006-03-16

Family

ID=36036627

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2005/000433 WO2006028406A1 (fr) 2004-09-03 2005-08-25 Procede pour produire des ions negatifs

Country Status (1)

Country Link
WO (1) WO2006028406A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709229A (en) * 1950-06-01 1955-05-24 Rca Corp Radioactive monokinetic charged particle generators
SU1124208A1 (ru) * 1983-01-10 1984-11-15 Предприятие П/Я А-7629 Способ измерени времен релаксации парамагнитных центров вещества
SU1067972A1 (ru) * 1981-06-18 1992-05-07 Предприятие П/Я А-7797 Способ получени отрицательных ионов
RU2066094C1 (ru) * 1990-10-29 1996-08-27 Научно-исследовательский институт тепловых процессов Способ нейтрализации положительных ионов
RU2089884C1 (ru) * 1995-01-31 1997-09-10 Институт химии высокочистых веществ РАН Способ определения газообразующих примесей в твердых высокочистых веществах
JP2004139946A (ja) * 2002-10-18 2004-05-13 Mikio Okamoto マイナスイオンの発生方法及び発生装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709229A (en) * 1950-06-01 1955-05-24 Rca Corp Radioactive monokinetic charged particle generators
SU1067972A1 (ru) * 1981-06-18 1992-05-07 Предприятие П/Я А-7797 Способ получени отрицательных ионов
SU1124208A1 (ru) * 1983-01-10 1984-11-15 Предприятие П/Я А-7629 Способ измерени времен релаксации парамагнитных центров вещества
RU2066094C1 (ru) * 1990-10-29 1996-08-27 Научно-исследовательский институт тепловых процессов Способ нейтрализации положительных ионов
RU2089884C1 (ru) * 1995-01-31 1997-09-10 Институт химии высокочистых веществ РАН Способ определения газообразующих примесей в твердых высокочистых веществах
JP2004139946A (ja) * 2002-10-18 2004-05-13 Mikio Okamoto マイナスイオンの発生方法及び発生装置

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