Title:
RADIO-FREQUENCY (RF) VOLTAGE SUPPLY SYSTEM AND METHOD FOR SUPPLYING A MULTIPOLE MASS SPECTROMETER WITH THE ALTERNATING RF VOLTAGE USED TO GENERATE A MULTIPOLE FIELD
Document Type and Number:
WIPO Patent Application WO/2011/086108
Kind Code:
A4
Abstract:
The invention relates to a radio-frequency (RF) voltage supply system (1) for supplying a multipole mass spectrometer, in particular a quadrupole mass spectrometer, with the alternating RF voltage (142) used to generate a multipole field, in particular a quadrupole field (6), in a secondary circuit (22) excited by means of a primary circuit (18). The RF voltage supply system (1) comprises an RF voltage measuring device (10), by means of which the alternating RF voltage (142) in the secondary circuit (22) is sampled and a digital measurement value that is dependent on said alternating RF voltage (142) is determined. The RF voltage supply system (1) further comprises a computing device (12), by means of which a digital alternating voltage amplitude setting value (154) is determined, taking said measurement value into account. Finally, the RF voltage supply system (1) comprises an RF voltage generator (8), by means of which the alternating RF voltage (142) can be made available with an alternating RF voltage amplitude that is set depending on the alternating voltage amplitude setting value (154). The RF voltage generator (8) comprises automatic frequency control means, by means of which the frequency in the secondary circuit (22) can automatically be maintained at resonance with the frequency in the primary circuit (18) by controlling the frequency in the primary circuit. The RF voltage generator (8) adjusts a frequency of the alternating voltage (138) in the primary circuit (18) in accordance with the respective frequency value (152) and maintains said frequency with quartz precision.
Inventors:
THOMSEN KLAUS (DE)
KAPPELT RAINER (DE)
REINERMANN ROLF (DE)
KAPPELT RAINER (DE)
REINERMANN ROLF (DE)
Application Number:
PCT/EP2011/050362
Publication Date:
September 09, 2011
Filing Date:
January 12, 2011
Export Citation:
Assignee:
INPROCESS INSTR GMBH (DE)
THOMSEN KLAUS (DE)
KAPPELT RAINER (DE)
REINERMANN ROLF (DE)
THOMSEN KLAUS (DE)
KAPPELT RAINER (DE)
REINERMANN ROLF (DE)
International Classes:
H02M5/10; H01J49/02
Attorney, Agent or Firm:
WASILJEFF, Johannes (Otto-Lilienthal-Straße 25, Bremen, DE)
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