Changes between Version 402 and Version 403 of AstroTechTalk
- Timestamp:
- 5 Apr 2019, 08:52:54 (5 years ago)
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AstroTechTalk
v402 v403 38 38 || '''22.03.2019[[BR]](10hrs, HdA Auditorium)''' || '''Noah Schwartz (ATC Edinburgh)''' || '''Adaptive Optics for HARMONI: a diffraction-limited ELT[[BR]]'''[[BR]]HARMONI is a visible and near-infrared integral field spectrograph, providing the ELT’s core spectroscopic capability, starting at First Light. To get the full sensitivity and spatial resolution gain, HARMONI will work at diffraction limited scales. This will be possible due to two adaptive optics (AO) systems, complementary to each other. The first one is a simple but efficient Single Conjugate AO system (good performance, low sky coverage), fully integrated in HARMONI itself. The second one is a Laser Tomographic AO system, providing a very high sky-coverage to the instrument. Both AO modes for HARMONI have gone through the Preliminary Design Review at the end of 2017, and will enter in Final Design phase from early 2018 to early 2020.[[BR]][[BR]] In this talk, Noah Schwartz will provide an overview of HARMONI and on the on-going developments in the AO systems. He will focus on the single conjugate mode (SCAO) and in particular the SCAO wavefront sensing using a Pyramid. He will also detail a set of key items that have been addressed during the PDR, especially the “Island Effect” produced by the ELT's segmented pupil, and how the instrument team plans to tackle it.[[BR]][[BR]]Presentation: English[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2019S1/2019-03-22_HARMONI_AO.pdf Slides: English][[BR]]Questions: German, English || 39 39 || 29.03.2019 || || || 40 || '''05.04.2019[[BR]](11Uhr, MPIA Hoersaal)''' || '''Robert Harris [[BR]](ZAH, LSW)''' || '''A multi-core integral field unit (MCIFU) instrument: Spectroscopy of disks and planets using single mode fibres[[BR]]'''[[BR]]They say the best things in life are free and whilst that is not technically true, it’s amazing what you can do with a shoestring budget and enough favours (including a mystery contribution from the MPIA). Today, Robert Harris will present LSW's multi-core integral field unit (IFU) instrument, a single mode IFU, designed to filter starlight and characterise directly imaged exoplanets with a R ~ 5000. It is based upon the SCAR concept, using the spatial filtering properties of single mode fibres to increase the star-planet contrast.[[BR]][[BR]]Once built, the full instrument will be fed by an AO corrected beam, with the light being captured by a custom array of 3D printed microlenses sitting on a 73 core multi-core fibre, which will feed a reformatter. This in turn will form the pseudo-slit of a diffraction limited spectrograph, with a footprint of around ~ 30cm x 50cm, not bad for an instrument that is designed to sit behind an 8 m class telescope. It will have its preliminary integration and testing in July 2019 at the 4.2 m William Herschel ltelescope in La Palma. Here we hope to fully characterise the instrument and hopefully get some nice scientific results before taking the instrument onto bigger and better things! [[BR]][[BR]]Presentation: English[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2019S1/2019-04-05_MCIFU.pdf Slides: English][[BR]]Questions: German, English ||40 || '''05.04.2019[[BR]](11Uhr, MPIA Hoersaal)''' || '''Robert Harris [[BR]](ZAH, LSW)''' || '''A multi-core integral field unit (MCIFU) instrument: Spectroscopy of disks and planets using single mode fibres[[BR]]'''[[BR]]They say the best things in life are free and whilst that is not technically true, it’s amazing what you can do with a shoestring budget and enough favours (including a mystery contribution from the MPIA). Today, Robert Harris will present LSW's multi-core integral field unit (IFU) instrument, a single mode IFU, designed to filter starlight and characterise directly imaged exoplanets with a R ~ 5000. It is based upon the SCAR concept, using the spatial filtering properties of single mode fibres to increase the star-planet contrast.[[BR]][[BR]]Once built, the full instrument will be fed by an AO corrected beam, with the light being captured by a custom array of 3D printed microlenses sitting on a 73 core multi-core fibre, which will feed a reformatter. This in turn will form the pseudo-slit of a diffraction limited spectrograph, with a footprint of around ~ 30cm x 50cm, not bad for an instrument that is designed to sit behind an 8 m class telescope. It will have its preliminary integration and testing in July 2019 at the 4.2 m William Herschel telescope in La Palma. Here we hope to fully characterise the instrument and hopefully get some nice scientific results before taking the instrument onto bigger and better things! [[BR]][[BR]]Presentation: English[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2019S1/2019-04-05_MCIFU.pdf Slides: English][[BR]]Questions: German, English || 41 41 || 12.04.2019 || || || 42 42 || 19.04.2019 || -- || Good Friday ||
