<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-09-19T08:16:16Z</responseDate><request verb="GetRecord" identifier="oai:dspace.mit.edu:1721.1/44827" metadataPrefix="dim">https://dspace.mit.edu/server/oai/request</request><GetRecord><record><header><identifier>oai:dspace.mit.edu:1721.1/44827</identifier><datestamp>2022-01-13T07:54:41Z</datestamp><setSpec>com_1721.1_7582</setSpec><setSpec>com_1721.1_7581</setSpec><setSpec>col_1721.1_131024</setSpec></header><metadata><dim:dim xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.dspace.org/xmlns/dspace/dim http://www.dspace.org/schema/dim.xsd">
   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Joseph Formaggio.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">Trowbridge, Sarah Nicole</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="other" lang="en_US">Massachusetts Institute of Technology. Dept. of Physics.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="department">Massachusetts Institute of Technology. Department of Physics</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="accessioned">2009-03-16T19:48:16Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="available">2009-03-16T19:48:16Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">2008</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="issued" lang="en_US">2008</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="uri">http://hdl.handle.net/1721.1/44827</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="oclc" lang="en_US">301562101</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2008.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (p. 61-62).</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="abstract" lang="en_US">The KArlsruhe TRitium Neutrino experiment (KATRIN) is currently in under construction, with plans to be activated in 2010. The experiment will measure the energy of electrons recoiling from the three body beta decay of Tritium (Hydrogen with two neutrons) in order to obtain the mass of the neutrino. The experiment will be sensitive down to 0.2ev/c2. My thesis focuses on the one of the calibration sources for this experiment: the Penning trap electron gun. This calibration source will use ion storage techniques usually used in high resolution mass spectroscopy to store and excite electrons to a known energy and then release them with a user-controlled angular distribution. These electrons will then travel through the experimental apparatus and be detected as if they were electrons from events in the experiment, thus providing valuable information on the response of the detector. In this thesis, I performed simulations in a windows-based ion flight package to measure the characteristic frequencies of an ion caught in the trap as well as to study the response of the system to driving by microwaves. I also worked on testing of the first two prototypes of the electron gun itself, concentrating on transitioning from a thermionic electron source to a photoelectric electron source.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="statementofresponsibility" lang="en_US">by Sarah Nicole Trowbridge.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="degree" lang="en_US">S.B.</dim:field>
   <dim:field mdschema="dc" element="format" qualifier="extent" lang="en_US">62 p.</dim:field>
   <dim:field mdschema="dc" element="language" qualifier="iso" lang="en_US">eng</dim:field>
   <dim:field mdschema="dc" element="publisher" lang="en_US">Massachusetts Institute of Technology</dim:field>
   <dim:field mdschema="dc" element="rights" lang="en_US">M.I.T. theses are protected by 
copyright. They may be viewed from this source for any purpose, but 
reproduction or distribution in any format is prohibited without written 
permission. See provided URL for inquiries about permission.</dim:field>
   <dim:field mdschema="dc" element="rights" qualifier="uri" lang="en_US">http://dspace.mit.edu/handle/1721.1/7582</dim:field>
   <dim:field mdschema="dc" element="subject" lang="en_US">Physics.</dim:field>
   <dim:field mdschema="dc" element="title" lang="en_US">The penning trap electron gun for the KATRIN experiment</dim:field>
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   	&lt;Title>The penning trap electron gun for the KATRIN experiment&lt;/Title>
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   	&lt;PublicationDate>2008&lt;/PublicationDate>
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        	&lt;DisplayName&gt;Trowbridge, Sarah Nicole&lt;/DisplayName>
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    &lt;Keyword>Physics.&lt;/Keyword>
   	&lt;Abstract>The KArlsruhe TRitium Neutrino experiment (KATRIN) is currently in under construction, with plans to be activated in 2010. The experiment will measure the energy of electrons recoiling from the three body beta decay of Tritium (Hydrogen with two neutrons) in order to obtain the mass of the neutrino. The experiment will be sensitive down to 0.2ev/c2. My thesis focuses on the one of the calibration sources for this experiment: the Penning trap electron gun. This calibration source will use ion storage techniques usually used in high resolution mass spectroscopy to store and excite electrons to a known energy and then release them with a user-controlled angular distribution. These electrons will then travel through the experimental apparatus and be detected as if they were electrons from events in the experiment, thus providing valuable information on the response of the detector. In this thesis, I performed simulations in a windows-based ion flight package to measure the characteristic frequencies of an ion caught in the trap as well as to study the response of the system to driving by microwaves. I also worked on testing of the first two prototypes of the electron gun itself, concentrating on transitioning from a thermionic electron source to a photoelectric electron source.&lt;/Abstract>
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