An energetic charged particle beam introduced to an rf cavity excites a wakefield therein. This wakefield can be decomposed into a series of higher order modes and multipoles, which for sufficiently small beam offsets are dominated by the dipole component. This work focuses on using these dipole modes to detect the beam position in third harmonic superconducting S-band cavities for light source applications. A rigorous examination of several means of analysing the beam position based on signals radiated to higher order modes ports is presented. Experimental results indicate a position resolution, based on this technique, of 20 microns over a complete module of 4 cavities. Methods are also indicated for improving the resolution and for applying this method to other cavity configurations. This work is distinguished by its clarity and potential for application to several other international facilities. The material is presented in a didactic style and is recommended both for students new to the field, and for scientists well-versed in the field of rf diagnostics.

An energetic charged particle beam introduced to an rf cavity excites a wakefield therein. This wakefield can be decomposed into a series of higher order modes and multipoles, which for sufficiently small beam offsets are dominated by the dipole component. This work focuses on using these dipole modes to detect the beam position in third harmonic superconducting S-band cavities for light source applications. A rigorous examination of several means of analysing the beam position based on signals radiated to higher order modes ports is presented. Experimental results indicate a position resolution, based on this technique, of 20 microns over a complete module of 4 cavities. Methods are also indicated for improving the resolution and for applying this method to other cavity configurations. This work is distinguished by its clarity and potential for application to several other international facilities. The material is presented in a didactic style and is recommended both for students new to the field, and for scientists well-versed in the field of rf diagnostics.

An der andauernden Konstruierung von Familienformen und der Modellierung von Geschlechterrollen und familiaren Beziehungsmustern sowie der Wechselbeziehung von Ehe, Sexualitat und Familie ist die deutsche Literatur nach 1945 in erheblichem Masse beteiligt. Diese Arbeit zielt auf den Wandel des Familienbildes in der deutschen Literatur nach 1945 und greift verschiedene literarische Werke auf. Die wichtigen Ansatze der Familiensoziologie, Gender Studies, Sexualwissenschaft und Erziehungswissenschaft stellen nach ihrer jeweils eigenen Definition von Familie und der jeweils eigenen Perspektive auf Familiengeschichte unterschiedliche Fragen an die Familie und deren Wandel. Von diesen Standpunkten ausgehend stellt die Untersuchung die These auf, dass das patriarchalische Familienbild in der deutschen Literatur nach 1945 ins Wanken gerat und sich ein offeneres Familienbild auspragt. Trotz der Wandlung des Familienbildes kann von funktionaler Ausdifferenzierung und Deinstitutionalisierung der Familie keine Rede sein. Stattdessen sind ein Funktionswandel von Familien und eine Gestaltung neuer Familienformen zu beobachten.