GB1150207A - Improvements relating to Mass Spectrometry. - Google Patents

Improvements relating to Mass Spectrometry.

Info

Publication number
GB1150207A
GB1150207A GB39818/66A GB3981866A GB1150207A GB 1150207 A GB1150207 A GB 1150207A GB 39818/66 A GB39818/66 A GB 39818/66A GB 3981866 A GB3981866 A GB 3981866A GB 1150207 A GB1150207 A GB 1150207A
Authority
GB
United Kingdom
Prior art keywords
voltage
electron multiplier
logarithmic
sept
resistors
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
GB39818/66A
Inventor
Leslie Wood
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB39818/66A priority Critical patent/GB1150207A/en
Priority to FR120025A priority patent/FR1547553A/en
Priority to DE19671648805 priority patent/DE1648805A1/en
Priority to US665403A priority patent/US3510647A/en
Publication of GB1150207A publication Critical patent/GB1150207A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J49/00—Particle spectrometers or separator tubes
    • H01J49/02—Details
    • H01J49/025—Detectors specially adapted to particle spectrometers

Landscapes

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

Abstract

1,150,207. Logarithmic circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 5 Sept., 1967 [6 Sept., 1966], No. 39818/66. Heading G4G. [Also in Division H1] A logarithmic function generator, used in combination with a mass spectrometer-electron multiplier arrangement wherein the product of the monitor collector current of the mass spectrometer (at MC, Fig. 1, not shown) and the electron multiplier gain is required to be constant, comprises semi-conductor diode D1 having a logarithmic voltage/current characteristic, the voltage drop across same being backed off by adjusting the potentiometer R4 when the input is below a required minimum value but otherwise amplified by transistors Q 1 , Q 2 , Q 3 and resistors R 7 to R 12 (Q 4 , R 13 and R 14 providing the correct D.C. level of the emitter of Q 3 ). The output voltage is developed across resistors R 12 , R 13 and R 14 , while R 16 and R 17 together form the third adding resistor RA 3 (Fig. 1, not shown) by means of which the output of the function generator is made to control the effective reference voltage for the stabilizer (VS) supplying the electron multiplier supply voltage.
GB39818/66A 1966-09-06 1966-09-06 Improvements relating to Mass Spectrometry. Expired GB1150207A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB39818/66A GB1150207A (en) 1966-09-06 1966-09-06 Improvements relating to Mass Spectrometry.
FR120025A FR1547553A (en) 1966-09-06 1967-09-05 Improvements to mass spectrometers to reduce spectra deformation
DE19671648805 DE1648805A1 (en) 1966-09-06 1967-09-05 mass spectrometry
US665403A US3510647A (en) 1966-09-06 1967-09-05 Automatic sensitivity control for a mass spectrometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39818/66A GB1150207A (en) 1966-09-06 1966-09-06 Improvements relating to Mass Spectrometry.

Publications (1)

Publication Number Publication Date
GB1150207A true GB1150207A (en) 1969-04-30

Family

ID=10411673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39818/66A Expired GB1150207A (en) 1966-09-06 1966-09-06 Improvements relating to Mass Spectrometry.

Country Status (3)

Country Link
US (1) US3510647A (en)
DE (1) DE1648805A1 (en)
GB (1) GB1150207A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742228A (en) * 1971-03-04 1973-06-26 Varian Associates Magnet control circuit utilizing square root circuit and additional compensation circuit
US3946229A (en) * 1974-03-29 1976-03-23 The Bendix Corporation Gain control for a quadrupole mass spectrometer
US3898456A (en) * 1974-07-25 1975-08-05 Us Energy Electron multiplier-ion detector system
US4024399A (en) * 1975-01-06 1977-05-17 Jersey Nuclear-Avco Isotopes, Inc. Method and apparatus for measuring vapor flow in isotope separation
US4084090A (en) * 1975-06-16 1978-04-11 California Institute Of Technology Automated mass spectrometer analysis system
US4507555A (en) * 1983-03-04 1985-03-26 Cherng Chang Parallel mass spectrometer
US7238936B2 (en) * 2004-07-02 2007-07-03 Thermo Finnigan Llc Detector with increased dynamic range
GB0620963D0 (en) * 2006-10-20 2006-11-29 Thermo Finnigan Llc Multi-channel detection
US7622713B2 (en) * 2008-02-05 2009-11-24 Thermo Finnigan Llc Method and apparatus for normalizing performance of an electron source
US8426805B2 (en) * 2008-02-05 2013-04-23 Thermo Finnigan Llc Method and apparatus for response and tune locking of a mass spectrometer
US11469088B2 (en) 2020-10-19 2022-10-11 Thermo Finnigan Llc Methods and apparatus of adaptive and automatic adjusting and controlling for optimized electrometer analog signal linearity, sensitivity, and range

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565265A (en) * 1949-06-30 1951-08-21 Dow Chemical Co Stabilized electrooptical system
US2659821A (en) * 1952-01-25 1953-11-17 Jr John A Hipple Spectrometric analysis of solids
US2854583A (en) * 1956-08-27 1958-09-30 Cons Electrodynamics Corp Gain stabilizer for an electron multiplier tube

Also Published As

Publication number Publication date
DE1648805A1 (en) 1971-08-12
US3510647A (en) 1970-05-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees