Changes between Version 21 and Version 22 of AstroTechTalk

Timestamp:

22 Sep 2014, 12:21:48 (10 years ago)

Author:

gaessler

Comment:

link zu vortrag

AstroTechTalk

@@ -26 +26 @@
 ||'''Date''' ||'''Speaker''' ||'''Topic''' ||
 || '''12.09.2014''' || '''Martin Kürster''' || '''The project landscape of the technical departments'''[[BR]][[BR]]Here's another one of those funny names for a new instrument. But actually, what is it about?  Do you also sometimes feel like this? Martin Kürster will give us an overview of the instruments we are building at MPIA.  From this, we should be able to get the connection between those acronyms and the instruments.  But not only that, after several years of heavy overbooking of the technical departments the mid-term future of the project landscape has recently become a bit unclear due to repeated delays of the European Extremely Large Telescope (E-ELT). Martin Kürster will also tell us about possible future initiatives, project acquisitions still under discussion, that will pose new challenges for the technical departments.[[BR]][[BR]]Talk: German                                          [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/WikiStart/2014-09-12_instrumentation_projects.pdf Slides: English][[BR]]Questions: German, English ||
-|| '''19.09.2014''' || '''Ralf-Rainer Rohloff''' || '''Precision metal optics over a large temperature range '''[[BR]] [[BR]]Since long, metal optics are an important part of astronomical instruments. Often diamond turned mirrors of aluminum (Al6061) are used. But it is difficult to polish aluminum. Therefore, the mirror is coated with Nickle Phosphor layer, which can be  polished  more  easily. This is very important  at shorter  wavelength. But  the mirrors  deform  with temperature changes  because of  the different coeffient of thermal expansion between aluminum and NiP. [[BR]][[BR]]Ralf-Rainer will tell us about a  collaboration between MPIA Heidelberg and IOF Jean, which  developed and  tested a new material to minimize the temperature related   deformation   of  such   mirrors. The  material   consists   of  an  aluminum silicate,  which  has  a coefficient of  thermal  expansion   close to  NiP. Thus,  the deformation could  be  reduced   drastically. But  now   the  work  just   started. Is it possible to built a mirror of this material? Does the material change with time? The best   answer  would  be  the  study  could  show  that such mirror  can be built and are stable over time! [[BR]][[BR]]Talk: German                                          [[BR]]Slides: English                              [[BR]]Questions: German, English ||
+|| '''19.09.2014''' || '''Ralf-Rainer Rohloff''' || '''Precision metal optics over a large temperature range '''[[BR]] [[BR]]Since long, metal optics are an important part of astronomical instruments. Often diamond turned mirrors of aluminum (Al6061) are used. But it is difficult to polish aluminum. Therefore, the mirror is coated with Nickle Phosphor layer, which can be  polished  more  easily. This is very important  at shorter  wavelength. But  the mirrors  deform  with temperature changes  because of  the different coeffient of thermal expansion between aluminum and NiP. [[BR]][[BR]]Ralf-Rainer will tell us about a  collaboration between MPIA Heidelberg and IOF Jean, which  developed and  tested a new material to minimize the temperature related   deformation   of  such   mirrors. The  material   consists   of  an  aluminum silicate,  which  has  a coefficient of  thermal  expansion   close to  NiP. Thus,  the deformation could  be  reduced   drastically. But  now   the  work  just   started. Is it possible to built a mirror of this material? Does the material change with time? The best   answer  would  be  the  study  could  show  that such mirror  can be built and are stable over time! [[BR]][[BR]]Talk: German                                          [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/WikiStart/2014-09-19_metal_optics.pdf Slides: English ]                            [[BR]]Questions: German, English ||
 || 26.09.2014 || '''Tom Herbst''' || '''LINC-NIRVANA - the path to the telescope[[BR]][[BR]]'''[[BR]]LINC-NIRVANA is an ambitious high resolution imager for the LBT, and it is  currently the largest single instrument contribution at the MPIA. We  are also the Principal Investigator institute, and hence are  responsible for the complex integration and testing phase now underway.[[BR]][[BR]]LN uses Multi-Conjugate Adaptive Optics (MCAO) for high-sky-coverage diffraction-limited imagery and (eventually) interferometric beam combination. The last two years have seen both successes and challenges. On the one hand, final integration is proceeding well in the lab. We also achieved First Light at the LBT with the Pathfinder experiment. On the other hand, funding constraints have forced a significant re-planning of the overall instrument implementation. Tom Herbst presents the  progress and plans for bringing the remainder of the instrument online  at the telescope in the next year.'''[[BR]][[BR]]'''Talk: Englisch                  [[BR]]Slides: German??[[BR]]Questions: German, Englisch ||
 || 03.10.2014 ||-- ||Tag der deutschen Einheit ||