Publikationsserver der RWTH Aachen University
Neue unilaterale NMR-Sensoren und ihre Anwendung
Abstract
dc:descriptionThis dissertation presents a new type of NMR-Sensor called the Bar Magnet-MOUSE. It consists of a simple bar magnet producing the static B0-field of the sensor and an oscillating circuit including a rf-coil to produce the orthogonal B1-field components. The complete history of the development of the new type of sensor is described, starting with the layout of the magnet system and a suitable pole piece, followed by the design of three different rf-coils, the prequalification of the prototype and ending with the optimized production model. Three different sensors for three different applications are shown: a) a sensor, which is insensitive to external noise, for relaxation time measurements in an industrial environment, b) a sensor to measure diffusion, c) a sensor to investigate thin samples. The specific applications for the sensors b) and c) are shown: In the case of the diffusion sensor the constant relaxation-time method was adapted to and used in the highly inhomogeneous B0- and B1-field for the first time. The method was used to investigate diffusion in complex solvent polymer systems and the anisotropie of diffusion in tendom. Sensor c) was used to investigate aging processes of the surface of elastomer samples to build a chemical sensor by fixing a latex membrane to the surface of the rf-coil. The sensor was used to detect swelling and drying processes of the membrane. Additionally drying processes of adhesives where measured. The last chapter describes the first application of the NMR-MOUSE® in granular media. It is shown, that the NMR-MOUSE® can be used to detect the phase transitions of a fluidized bed reactor.
Degree
thesis:*- Grantor dc:publisher
- Publikationsserver der RWTH Aachen University
- Year dc:date
- 2003
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Klein, Martin
- Contributors dc:contributor
-
- Blümich, Bernhard
Subjects
dc:subject × 8Rights
dc:rights- Statement dc:rights
-
- info:eu-repo/semantics/openAccess
- Language dc:language
- ger
Identifiers
dc:identifier.*- OAI identifier oai:identifier
- oai:publications.rwth-aachen.de:61975