Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 29: Precision Measurements and Metrology III

Q 29.3: Talk

Wednesday, March 10, 2010, 14:30–14:45, A 310

Digital control and data system for the AEI 10m prototype interferometer — •Michael Born for the 10m Prototype team — Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Institut für Gravitationsphysik, Leibniz Universität Hannover, Callinstr. 38, D-30167 Hannover

A 10m prototype interferometer is currently under construction in Hannover, Germany. One primary goal is to reach and surpass the standard quantum limit of interferometry for 100g test masses [1]. The control and data taking for this complex experimental facility will be carried out with a dedicated digital system. All relevant servo loops will be implemented digitally using a realtime control and data system (CDS) that will also be used for next generation gravitational wave detectors. Control algorithms can be implemented via Matlab/Simulink models or C-code from which a realtime capable module is subsequently generated. In the initial configuration about 500 EPICS channels will be recorded or controlled. Among these are channels for the control of the frequency reference cavity, the main interferometer, and the isolated optical tables inside the UHV envelope. Control signals for these tables will be derived from a supension platform interferometer which adapts LISA Pathfinder phasemeter technology. The data from the phasemeter are read from an enhanced parallel port (EPP) via a newly designed microcontroller-based ethernet interface. The digital control and data system as well as the novel interface to the phasemeter will be introduced in detail.

[1] http://10m-prototype.aei.uni-hannover.de