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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