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Axial alignment in a ring-collection beta-ray spectrometer

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Title: Axial alignment in a ring-collection beta-ray spectrometer
Author: Earle, Eric Davis
Degree: Master of Science - MSc
Program: Physics
Copyright Date: 1960
Subject Keywords Spectrometer.;Mass Spectrometry.
Issue Date: 2012-01-17
Publisher University of British Columbia
Series/Report no. UBC Retrospective Theses Digitization Project [http://www.library.ubc.ca/archives/retro_theses/]
Abstract: A thin-lens beta-ray spectrometer using ring-focus collection was modified. These modifications consisted of; 1) a centering mechanism enabling the source-detector axis to be aligned with the magnetic axis; 2) an extension of the vacuum chamber placing the detector further from the magnet coils. The latter considerably decreased the magnetic shielding requirements for the detector. A misalignment of 0.25 mm. for parallel axes and of 0°09' for intersecting axes produced noticeably poorer performance. Using a gathering power of .70%, a resolving power of .94% was obtained for the 661.6 Kev. K-conversion peak of Cs ¹³⁷.
Affiliation: Science, Faculty of
URI: http://hdl.handle.net/2429/40123
Scholarly Level: Graduate

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