JPS5546421A - Mass spectrometer - Google Patents

Mass spectrometer

Info

Publication number
JPS5546421A
JPS5546421A JP11935178A JP11935178A JPS5546421A JP S5546421 A JPS5546421 A JP S5546421A JP 11935178 A JP11935178 A JP 11935178A JP 11935178 A JP11935178 A JP 11935178A JP S5546421 A JPS5546421 A JP S5546421A
Authority
JP
Japan
Prior art keywords
voltage
sensitivity
electric field
comparator
signal generator
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.)
Pending
Application number
JP11935178A
Other languages
Japanese (ja)
Inventor
Yoshiaki Kato
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11935178A priority Critical patent/JPS5546421A/en
Publication of JPS5546421A publication Critical patent/JPS5546421A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make the spectrum correctly obtainable automatically in a required sensitivity, by means of changing a sensitivity of ion detection system to a preset value in the method of comparison between electric field intensity and preset value.
CONSTITUTION: In the mass spectrometer, which is made so as to sweep the electric field with an ion source 1, electric field 2, magnetic field 4, secondary electron multiplier 6, recorder 8, magnetic field current controller 9, magnetic field detector 10, electric field voltage generator 11 and gain converter 12 comprised, are provided a comparator 13, sensitivity selecting signal generator 14 and programmer 15. With a work of link sweeping started, an output voltage of the field detector 10 is also fed to the comparator 13, and compared witha voltage set for sensitivity changing, with a signal fed to the sensitivity selecting signal generator 14 at the time of the voltage coinciding, and the signal generator 14 changes a gain by switching a supply voltage to the secondary electron multiplier 6 or input resistance of DC amlifier 7. The programmer 15 makes a setting of the voltage at the next switching point to the comparator 13.
COPYRIGHT: (C)1980,JPO&Japio
JP11935178A 1978-09-29 1978-09-29 Mass spectrometer Pending JPS5546421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11935178A JPS5546421A (en) 1978-09-29 1978-09-29 Mass spectrometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11935178A JPS5546421A (en) 1978-09-29 1978-09-29 Mass spectrometer

Publications (1)

Publication Number Publication Date
JPS5546421A true JPS5546421A (en) 1980-04-01

Family

ID=14759330

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11935178A Pending JPS5546421A (en) 1978-09-29 1978-09-29 Mass spectrometer

Country Status (1)

Country Link
JP (1) JPS5546421A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6193546A (en) * 1984-10-13 1986-05-12 Jeol Ltd Energy analyzer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6193546A (en) * 1984-10-13 1986-05-12 Jeol Ltd Energy analyzer
JPH0358143B2 (en) * 1984-10-13 1991-09-04 Nippon Electron Optics Lab

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