Abstract

As a mass spectrum is scanned, the maximum value of each peak is stored in a capacitor. Then the difference between the stored voltage and the lesser voltage seen after the scan has proceeded down the side of the peak operates a peak detector, which in turn initiates measurement of the stored peak height by a digital voltmeter. At the same time the mass is determined by measuring the ion accelerating voltage with a modified self balancing potentiometer equipped with a shaft position digitizer.

Apparatus for Measurement of Luminescence Spectra with a Digital Recording System

F. R. Lipsett, G. Bechthold, F. D. Blair, F. V. Cairns, and D. H. O’Hara
Appl. Opt. 9(6) 1312-1318 (1970)

An Interval Recorder for Analysis of Spectra

George R. Harrison
J. Opt. Soc. Am. 28(8) 290-292 (1938)

Digital Recording for Spectrum Analysis

Frederick S. Brackett
J. Opt. Soc. Am. 50(12) 1193-1200 (1960)

An Apparatus for Automatic Recording of Reflection Spectra

James H. Schulman and Clifford C. Klick
J. Opt. Soc. Am. 43(6) 516-519 (1953)

Versatile Apparatus for Automatic Recording of Absolute Fluorescent Spectra*

F. R. Lipsett
J. Opt. Soc. Am. 49(7) 673-679 (1959)