EP1220289A3 - Plasma mass selector - Google Patents

Plasma mass selector Download PDF

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Publication number
EP1220289A3
EP1220289A3 EP01202936A EP01202936A EP1220289A3 EP 1220289 A3 EP1220289 A3 EP 1220289A3 EP 01202936 A EP01202936 A EP 01202936A EP 01202936 A EP01202936 A EP 01202936A EP 1220289 A3 EP1220289 A3 EP 1220289A3
Authority
EP
European Patent Office
Prior art keywords
chamber
cyclotron
electric field
uniform
plasma
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP01202936A
Other languages
German (de)
French (fr)
Other versions
EP1220289A2 (en
Inventor
Tihiro Ohkawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Archimedes Technology Group Inc
Original Assignee
Archimedes Technology Group Inc
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 Archimedes Technology Group Inc filed Critical Archimedes Technology Group Inc
Publication of EP1220289A2 publication Critical patent/EP1220289A2/en
Publication of EP1220289A3 publication Critical patent/EP1220289A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J49/00—Particle spectrometers or separator tubes
    • H01J49/26—Mass spectrometers or separator tubes
    • H01J49/28—Static spectrometers
    • H01J49/284—Static spectrometers using electrostatic and magnetic sectors with simple focusing, e.g. with parallel fields such as Aston spectrometer
    • H01J49/286—Static spectrometers using electrostatic and magnetic sectors with simple focusing, e.g. with parallel fields such as Aston spectrometer with energy analysis, e.g. Castaing filter
    • H01J49/288—Static spectrometers using electrostatic and magnetic sectors with simple focusing, e.g. with parallel fields such as Aston spectrometer with energy analysis, e.g. Castaing filter using crossed electric and magnetic fields perpendicular to the beam, e.g. Wien filter

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

A plasma mass selector for processing a partially ionized multi-species plasma includes magnetic coils that are mounted on a cylindrical chamber to establish an axially oriented uniform magnetic field in the chamber. A segmented quadrupole electrode creates a non-uniform cyclotron electric field in the chamber that is oriented perpendicular to the chamber axis to cross with the magnetic field. With the plasma in the chamber, a controller is activated to operate the non-uniform cyclotron electric field at a predetermined cyclotron frequency (ω). The electric field thus resonates with selected charged particles having the predetermined cyclotron frequency (ω) to restrain the selected particles in orbits around the central axis during their transit through the chamber. On the other hand, non-selected particles are allowed to drift radially outward from the central axis for collision with the wall and subsequent removal therefrom.
EP01202936A 2000-08-08 2001-08-02 Plasma mass selector Withdrawn EP1220289A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63466500A 2000-08-08 2000-08-08
US634665 2000-08-08

Publications (2)

Publication Number Publication Date
EP1220289A2 EP1220289A2 (en) 2002-07-03
EP1220289A3 true EP1220289A3 (en) 2003-05-14

Family

ID=24544729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01202936A Withdrawn EP1220289A3 (en) 2000-08-08 2001-08-02 Plasma mass selector

Country Status (2)

Country Link
EP (1) EP1220289A3 (en)
JP (1) JP2002150994A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114501768B (en) * 2022-01-30 2023-04-18 清华大学 Accelerator charged particle beam current compression device and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093856A (en) * 1976-06-09 1978-06-06 Trw Inc. Method of and apparatus for the electrostatic excitation of ions
EP1001450A2 (en) * 1998-11-16 2000-05-17 Archimedes Technology Group, Inc. Plasma mass filter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093856A (en) * 1976-06-09 1978-06-06 Trw Inc. Method of and apparatus for the electrostatic excitation of ions
EP1001450A2 (en) * 1998-11-16 2000-05-17 Archimedes Technology Group, Inc. Plasma mass filter

Also Published As

Publication number Publication date
EP1220289A2 (en) 2002-07-03
JP2002150994A (en) 2002-05-24

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