Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 63: Posters: Scanning Probe Methods
O 63.29: Poster
Mittwoch, 2. April 2014, 17:30–21:00, P2
A quantum yield measurement setup for the charge compensation for the LISA Pathfinder space mission — •Indro Biswas1, Mathias Schulze1, Gerald Hechenblaikner2, Tobias Ziegler2, Nico Brandt2, Patrick Bergner2, Felix Erfurth3, and Markus Pfeil3 — 1Deutsches Luft- und Raumfahrtzentrum e.V., Pfaffenwaldring 38-40, 70569 Stuttgart — 2Astrium Satellites GmbH, 88039 Friedrichshafen — 3TWT GmbH Science & Innovation, Ernsthaldenstraße 17, 70569 Stuttgart
The evolved Laser Interferometry Space Antenna (eLISA) is an international fundamental research project with the aim of the detection of gravitational waves by monitoring the distance between two test bodies in space. The LISA pathfinder mission will perform experiments in a small scale with lower precision and identify upcoming challenges for the future mission. A contactless minimally invasive discharge system based on the photoemission process is necessary in order to avoid electrostatic forces on the test bodies. For the development the photoemission quantum yields of possible coatings were determined and uprising methodical issues were evaluated. An experimental setup was designed in a high vacuum chamber for the recording of the energy distribution of electrons emitted by UV radiation. The differences between the ideal spherical and a cylindrical setup with a possibility for quick sample exchange are explained.