Changes between Version 239 and Version 240 of AstroTechTalk

Timestamp:

14 Nov 2016, 13:11:49 (8 years ago)

Author:

Ralph Hofferbert

Comment:

--

AstroTechTalk

@@ -35 +35 @@
 || '''11.11.2016 ''' || '''Vianak Naranjo''' || '''Characterization of Infrared Detectors - What is that?''' [[BR]][[BR]]Infrared instrumentation at MPIA is one of the major technical activities in house. It brings together the work of very different engineering areas, but for this talk the focus will be on the infrared detector and its characterization. What is this all about and why is it so important? An infrared detector cannot operate alone: as a complex unit of an infrared system the detector serves as a connection between the readout electronics and the software. The characterization process is the way of understanding how the detector works and how it behaves, and it is the key to guarantee the best performance of an instrument during operation. [[BR]][[BR]]If you have ever wondered what do the people working with infrared detectors do, please join us and find out! Everybody is welcome! [[BR]][[BR]]Presentation: German [[BR]]Slides: English [[BR]] Questions: German, English ||
 || '''18.11.2016''' || '''Sascha Douffet''' || '''Safety officers - Main actors and their tasks'''[[BR]][[BR]]The last  talk about occupational safety gave an overview, covering history,  structure, regulatory framework and tasks. Since the topic is very  complex, important questions are still to be answered about the main  actors and their tasks. [[BR]][[BR]]The following topics will be discussed  in the second part: Who are the main actors? What means "responsibility"  with respect to occupational safety? What are the main tasks? What may  happen, if responsibilities are not assumed and tasks are not fulfilled? [[BR]][[BR]]Every  employee should know, which functions and activities are implemented at  MPIA. Not only every colleague should know who is responsible for  occupational safety, also the responsible persons should know about  their tasks, such that those become a practical reality in the  day-to-day work. And hence, the risk for accidents is automatically  reduced. [[BR]][[BR]]Presentation: German                  [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2016S2/2016-11-18_Safety2.pdf Slides: German][[BR]]Questions: German, English ||
-|| 25.11.2016 || Michael Boehm (ISYS, Stuttgart) || OVMS+ for the Large Binocular Telescope ||
+|| '''25.11.2016''' || '''Michael Boehm (ISYS, Stuttgart)''' || '''OVMS-plus: Disturbance compensation at the LBT'''[[BR]][[BR]]Interferometry at modern large ground-based telescopes often utilizes an array of telescopes. However, this is only possible if the length of the light path is equal for all telescopes, i.e. the optical pathway difference (OPD) has to be zero. Because the optical elements of the telescopes tend to vibrate due to wind excitation, for example, the OPD is usually oscillating with peak-to-peak amplitudes of several µm and frequencies up to 60Hz. Without proper active compensation, this would render most measurement attempts in the near-infrared (NIR), rather useless, since . Thus, large telescopes such as the Large Binocular Telescope (LBT) are equipped with a dedicated optical vibration measurement system (OVMS) to be able to measure these disturbances and compensate for them in a fast feed-forward manner.[[BR]][[BR]]At the beginning of the talk Michael Boehm will briefly revisit the OVMS at the LBT and describe how the accelerometer readings can be used for disturbance compensation. The second part of the talk will present the new enhanced and centralized software architecture, called OVMS-plus, and illustrate several challenges faced during the implementation phase. [[BR]][[BR]]Finally, measurement results from LBTI proving the effectiveness of the approach and the ability to compensate for a large fraction of the telescope induced vibrations will be presented.[[BR]][[BR]]Presentation: German[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2016S2/2016-11-25_OVMSplus.pdf Slides: English][[BR]]Questions: German, English ||
 || 02.12.2016 || Thomas Bertram || Integration, installation and alignment of LINC-NIRVANA at the LBT ||
 || 09.12.2016 || Thomas Henning || Astronomy in Heidelberg - From the Koenigstuhl into the world ||