A comparison fluorimeter of high sensitivity

dc.contributor.author Larsen, Finn
dc.contributor.department Physics and Astronomy
dc.date 2018-08-23T18:52:13.000
dc.date.accessioned 2020-06-30T07:25:00Z
dc.date.available 2020-06-30T07:25:00Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 1948
dc.date.issued 1948
dc.description.abstract <p>A comparison fluorimeter, utilizing a secondary emission multiplier as the sensitive element, has been built. It consists of an optical system, an electronic switching system and power supply, and a housing for the entire assembly;A single secondary emission multiplier was used to alternately determine the intensity of the samples to be compared;A simple dual cathode follower system was designed to switch the multiplier tube, and to simultaneously provide impedance matching between the multiplier tube and the meter being used in the circuit;Tests on the cathode follower circuit show that it is a highly stable, comparatively linear system for detecting potential differences up to thirty volts;The entire unit was housed in an aluminum box designed to have all necessary controls readily accessible;The fluorimeter was found to be considerably more sensitive than existing devices using older types of phototubes;The fluorimeter has considerable range, and when used as recommended, was found to be nearly linear in its response to variations in concentration;Many of the design features are readily adaptable to similar devices, such as turbidity meters.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/12948/
dc.identifier.articleid 13947
dc.identifier.contextkey 6866590
dc.identifier.doi https://doi.org/10.31274/rtd-180813-14212
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/12948
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/66372
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/12948/r_DP12010.pdf|||Fri Jan 14 19:33:54 UTC 2022
dc.subject.disciplines Physics
dc.subject.keywords Fluorescence
dc.subject.keywords Physics
dc.title A comparison fluorimeter of high sensitivity
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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