Go to  Advanced Search

An on-line computer assisted mass spectrometer

Show full item record

Files in this item

Files Size Format Description   View
UBC_1971_A6_7 M58.pdf 3.599Mb Adobe Portable Document Format   View/Open
Title: An on-line computer assisted mass spectrometer
Author: Mitchell, David Laurie
Degree Master of Science - MSc
Program Geophysics
Copyright Date: 1971
Subject Keywords Mass spectrometry; Online data processing
Abstract: An analog data acquisition system incorporating an Interdata Model 4 digital computer has been designed and built for a mass spectrometer. This system has been conceived with the primary objectives of improving analytical precision and production. Automated mass spectrometer operation allows for the collection of larger quantities of data while decreasing operator involvement and consequently diminishing operator bias and fatigue. The analog signal from the mass spectrometer measuring system is digitized using a digital voltmeter and transmitted, via an interface, to the processor where the digital information is manipulated in accordance with a computer program. An additional facility is provided whereby digital data from the processor can be displayed, if desired, on a 5 decade numerical readout situated at the mass spectrometer console. Hardware is also available in the interface to provide control of the magnetic field scan rate. A function control switch at the mass spectrometer console allows the operator to convey a variety of predetermined instructions to the computer at any time during the course of a run. Thus, the system provides for on-line (real time) data processing of mass spectra as well as limited computer control over the mass spectrometer. This thesis is primarily concerned with the design and construction of the logic hardware for this system together with a demonstration of its operating ability.
URI: http://hdl.handle.net/2429/34170
Series/Report no. UBC Retrospective Theses Digitization Project [http://www.library.ubc.ca/archives/retro_theses/]
Scholarly Level: Graduate

This item appears in the following Collection(s)

Show full item record

All items in cIRcle are protected by copyright, with all rights reserved.

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893