Changes between Version 95 and Version 96 of AstroTechTalk
- Timestamp:
- 27 Apr 2015, 12:55:14 (9 years ago)
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AstroTechTalk
v95 v96 40 40 || 10.04.2015 || -- || No talk (Easter break) || 41 41 || '''17.04.2015''' || '''Michael Lehmitz''' || '''PLC control for MATISSE'''[[BR]][[BR]]Before the use of PLCs ("Programmable Logic Controllers") control tasks for scientific instruments were usually implemented with the help of discrete contact switches, relays and other electro-mechanical components in conjunction with a complex wiring. With increasing complexity of the scientific instruments and their infratructure also the demands with respect to the required control systems and their flexibility have grown.[[BR]][[BR]]For MATISSE, the "Multi-!AperTure mid-Infrared !SpectroScopic Experiment" for the Very Large Telescope, MPIA applied for the first time PLCs for supervising the instrument's two cryogenic systems, for controlling its calibration light sources and for reading-out sensors on the optical bench. [[BR]][[BR]]In this talk Michael Lehmitz gives an introduction to PLC-based control technology and presents, via a live-demo, the performance of the MATISSE system.[[BR]][[BR]]Talk: German[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/WikiStart/2015-04-17_MATISSE-PLC.pdf Slides: English][[BR]]Questions: German, English || 42 || '''24.04.2015''' || '''Kai Weidlich (Airbus DS Optronics)''' || '''BELA - ESA's first Laser Altimeter for Planetary Research[[BR]][[BR]]'''[[BR]]The space-qualified design of a miniaturized laser for the !BepiColombo laser altimeter (BELA) will be presented. It will form an integral part of a larger geodesy and geophysics package on board the Mercury Planetary Orbiter (MPO) of the !BepiColombo mission.[[BR]][[BR]]The laser facilitates pulsed operation at 10 Hz repetition rate and at 1064 nm wavelength. The laser design consists of a pair of diode-laser pumped, actively q-switched !Nd:YAG rod oscillators encapsulated into dry synthetic air. The system delivers at least 300 million laser pulses with 50 mJ energy and 5 ns duration. It will be launched in 2016 and, after a six-years cruise, will start recording topographic data from orbital altitudes between 400 km and 1500 km above Mercury's surface. Critical qualification issues of the BELA Laser comprise reliable operation of laser diodes, accurate transmitter-to-receiver alignment, stable pulse energy and stable beam divergence over 300 million laser pulses.[[BR]][[BR]]Starting design work at Carl Zeiss Optronics Oberkochen in 2008 the BELA Laser project was completed at Airbus DS Optronics with flight spare delivery in 2014.[[BR]][[BR]]Talk: German[[BR]] Slides: English[[BR]]Questions: German, English ||42 || '''24.04.2015''' || '''Kai Weidlich (Airbus DS Optronics)''' || '''BELA - ESA's first Laser Altimeter for Planetary Research[[BR]][[BR]]'''[[BR]]The space-qualified design of a miniaturized laser for the !BepiColombo laser altimeter (BELA) will be presented. It will form an integral part of a larger geodesy and geophysics package on board the Mercury Planetary Orbiter (MPO) of the !BepiColombo mission.[[BR]][[BR]]The laser facilitates pulsed operation at 10 Hz repetition rate and at 1064 nm wavelength. The laser design consists of a pair of diode-laser pumped, actively q-switched !Nd:YAG rod oscillators encapsulated into dry synthetic air. The system delivers at least 300 million laser pulses with 50 mJ energy and 5 ns duration. It will be launched in 2016 and, after a six-years cruise, will start recording topographic data from orbital altitudes between 400 km and 1500 km above Mercury's surface. Critical qualification issues of the BELA Laser comprise reliable operation of laser diodes, accurate transmitter-to-receiver alignment, stable pulse energy and stable beam divergence over 300 million laser pulses.[[BR]][[BR]]Starting design work at Carl Zeiss Optronics Oberkochen in 2008 the BELA Laser project was completed at Airbus DS Optronics with flight spare delivery in 2014.[[BR]][[BR]]Talk: German[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/WikiStart/2015-04-24_BELA1.pdf Slides: English Part1] [https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/WikiStart/2015-04-24_BELA2.pdf Part2][[BR]]Questions: German, English || 43 43 || 01.05.2015 || -- || No talk (public holiday) || 44 44 || 08.05.2015[[BR]]'''[[span(style=color: #FF0000, Seminarraum!!)]]''' || Tom Herbst [[BR]]Patrick Fopp || LBT all-sky camera ||
