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    <title>Methods for the design and analysis of higher-order mode couplers applied to superconducting accelerating structures</title>
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    <namePart>Gerigk, Frank</namePart>
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    <namePart>Rienen, Ursula van</namePart>
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  <abstract type="Summary">Higher-order modes (HOMs) may affect beam stability and refrigeration requirements of superconducting proton linacs such as the SPL which is being studied at CERN. One option being considered to limit these effects is the use of coaxial HOM couplers. In this work, potentially dangerous modes are analyzed and corresponding damping requirements derived. The design process of coaxial HOM couplers is examined under new aspects. Several prototypes are elaborated and compared in terms of mode damping, thermal loads, structural deformations, mechanical tolerances, and multipacting.&lt;eng&gt;</abstract>
  <abstract type="Summary">Moden höherer Ordnung (HOMs) können beträchtlich die Strahldynamik und Kühlanforderungen supraleitender Linearbeschleuniger, wie dem am CERN untersuchten SPL, beeinflussen. Koaxiale HOM Koppler sind eine Möglichkeit, um Auswirkungen entsprechender Moden zu begrenzen. Im Rahmen dieser Arbeit wurden potentiell gefährliche Moden analysiert und Dämpfungsanforderungen abgeleitet. Der Kopplerentwurf wurde unter neuen Gesichtspunkten aufgegriffen. Verschiedene Prototypen wurden bezüglich Modendämpfung, thermisches Verhaltens, strukturmechanischer Verformungen, Toleranzen und Multipactings verglichen.&lt;ger&gt;</abstract>
  <note type="statement of responsibility">vorgelegt von Kai Papke</note>
  <note>GutachterInnen: Frank Gerigk (European Organization for Nuclear Research (CERN)) ; Ursula van Rienen (University of Rostock) ; Thomas Eibert (Technical University of Munich)</note>
  <note type="thesis">Dissertation Universität Rostock 2020</note>
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      <title>Methods for the design and analysis of higher-order mode couplers applied to superconducting accelerating structures</title>
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