GB843956A - Improvements in or relating to voltage peak value comparison circuits - Google Patents

Improvements in or relating to voltage peak value comparison circuits

Info

Publication number
GB843956A
GB843956A GB584757A GB584757A GB843956A GB 843956 A GB843956 A GB 843956A GB 584757 A GB584757 A GB 584757A GB 584757 A GB584757 A GB 584757A GB 843956 A GB843956 A GB 843956A
Authority
GB
United Kingdom
Prior art keywords
amplifier
isotope
capacitance
potentiometer
output
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.)
Expired
Application number
GB584757A
Inventor
Daniel Fraser Davidson
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB584757A priority Critical patent/GB843956A/en
Publication of GB843956A publication Critical patent/GB843956A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J49/00—Particle spectrometers or separator tubes
    • H01J49/02—Details
    • H01J49/022—Circuit arrangements, e.g. for generating deviation currents or voltages ; Components associated with high voltage supply

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

843,956. Mass spectrographs. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Feb. 11, 1958 [Feb. 21, 1957], No. 5847/57. Class 40(3). [Also in Group XXXVI] A mass spectrometer (not shown) has a collector plate 1 receiving an ionized beam which is scanned by a magnet winding 2 excited through current stabilizer 3 from a scanning voltage generator 4; the plate 1 being connected to an amplifier 5 having feedback through resistor 7 switchable at 9 to a tap on output potentiometer 8 or to the entire output, which is fed through D.C. amplifier 6, series diode 10, and changeover switch 11 to charge either of capacitances 12, 13; which are differentially connected across valve voltmeter 14. An amplifier 18 excited from amplifier 5 operates relay contacts 16 just before peak output to charge capacitance 15 from either capacitance 12 or 13 and then to discharge into resistor 17. Switches 9, 11 are operated by synchronizer 19 responsive to flux variation of magnet 2. In measurement of isotope abundance ratio two isotope beams of different mass number are scanned over plate 1 and generate corresponding pulses representing respective isotope abundances. Immediately before arrival of the larger pulse, switches 9, 11 operate in synchronism with the scan to connect the amplifier feedback path direct to its output to reduce gain to a fixed level, and to connect capacitance 12 to be charged from diode 10. On arrival of the smaller pulse, switches 9, 11 change over to reduce the amplifier feedback to that from potentiometer 8 and to connect capacitance 13 to be charged; the difference voltage indicated by valve voltmeter 14 being zeroized by adjustment of potentiometer 8 of the amplifier feedback during the smaller pulse derived from the scan of the less abundant isotope beam; the amplifier gain ratio during scans of the isotope beams and thus the isotope abundance ratio being indicated by the potentiometer setting. To remove errors due to correlated variations in magnitude of the isotope beam pulses, relay contacts 16 discharge each capacitance 12, 13 into capacitance 15 by a small fraction of the total charge just before the peak voltage of each scan and discharge capacitor 15 into resistance 17 as the peak output of amplifier 5 falls to zero.
GB584757A 1957-02-21 1957-02-21 Improvements in or relating to voltage peak value comparison circuits Expired GB843956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB584757A GB843956A (en) 1957-02-21 1957-02-21 Improvements in or relating to voltage peak value comparison circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB584757A GB843956A (en) 1957-02-21 1957-02-21 Improvements in or relating to voltage peak value comparison circuits

Publications (1)

Publication Number Publication Date
GB843956A true GB843956A (en) 1960-08-10

Family

ID=9803745

Family Applications (1)

Application Number Title Priority Date Filing Date
GB584757A Expired GB843956A (en) 1957-02-21 1957-02-21 Improvements in or relating to voltage peak value comparison circuits

Country Status (1)

Country Link
GB (1) GB843956A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824390A (en) * 1971-10-18 1974-07-16 Perkin Elmer Corp Multichannel mass spectrometer
EP1170779A1 (en) * 1999-02-18 2002-01-09 Japan Science and Technology Corporation Isotopomer mass spectrometer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824390A (en) * 1971-10-18 1974-07-16 Perkin Elmer Corp Multichannel mass spectrometer
EP1170779A1 (en) * 1999-02-18 2002-01-09 Japan Science and Technology Corporation Isotopomer mass spectrometer
EP1170779A4 (en) * 1999-02-18 2006-07-12 Japan Science & Tech Agency Isotopomer mass spectrometer

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