Dr. Thomas Klein Profile

Dr. Thomas Klein

Head of Projects at European Southern Observatory

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 10 July 2018 Presentation + Paper

APEX beyond 2016: the evolution of an experiment into an efficient and productive Submillimeter Wavelength Observatory

Thomas Klein, Francisco Montenegro-Montes, Miroslaw Ciechanowicz, Claudio Agurto, Juan-Pablo Araneda, Oriel Arriagada, Francisco Azagra, Michael Cantzler, Mauricio Cárdenas, Patricio Caro, Michael Dumke, Edouard González, Christian Herrera, Felipe Mac-Auliffe, Rodrigo Parra, Juan Pablo Pérez-Beaupuits, Jorge Ramírez, Jorge Santana, Karl Torstensson, Paulina Venegas

Proceedings Volume 10704, 107041V (2018) https://doi.org/10.1117/12.2312687

KEYWORDS: Telescopes, Antennas, Control systems, Observatories, Sun, Failure analysis, Photonic integrated circuits, Receivers, Holography, Space telescopes

Read Abstract +

The Atacama Pathfinder EXperiment (APEX) operates a 12m submillimeter wavelength telescope in the high Andes in Chile at 5107 m above sea level since 2006¹. Several steps have been taken to improve the operation efficiency of the facility in the given harsh environmental conditions². The developments in remote control and -sensing allowed in 2017 for the transition to a remote science operations scheme, observing 24/7 from the basecamp control center in San Pedro de Atacama. Also engineering and maintenance is in the transition phase to a similar scheme to minimize presence and activities at the very high site. Instrument control servers allowing remote operation even of heterodyne THz instrumentation, with no compromise on instrument performance, had been developed and proven to reliably work³. The transition to full remote science operations required major hardware upgrades on the antenna drive system and a failsafe remote-control system to ensure the safety of the antenna, the Sun Avoidance System (SAS). We report on the layout, the implementation and on the experience of the first year of this new operations model started in April 2017.

The engineering tasks also are in a transition phase to a scheme that minimizes the presence at the antenna. Daily engineering work at the high site for preventive and corrective maintenance can be reduced when all critical hardware systems are integrated in a remote monitoring and control system. We have started with this in 2015 and have stepwise introduced this new scheme. This required the introduction of redundancies of systems as well as the extension of sensing points and remote-control interfaces, throughout all levels in the project breakdown structure of the telescope and its auxiliary systems. We present examples of theses implemented systems and discuss the concept of redundancies.

The APEX observatory is the smallest ESO site in Chile, incorporated as a department of LPO, the ESO La Silla – Paranal Observatory, within the directorate of Operations (DoO). The work presented will attempt an outline of approaches that can be applied to telescopes exposed to similar environmental conditions as well as to larger and distributed operations such as envisaged for the Paranal Observatory extended by the ELT on Cerro Armazones.

Proceedings Article | 19 July 2008 Paper

Submillimeter heterodyne arrays for APEX

R. Güsten, A. Baryshev, A. Bell, A. Belloche, U. Graf, H. Hafok, S. Heyminck, S. Hochgürtel, C. Honingh, K. Jacobs, C. Kasemann, B. Klein, T. Klein, A. Korn, I. Krämer, C. Leinz, A. Lundgren, K. Menten, K. Meyer, D. Muders, F. Pacek, D. Rabanus, F. Schäfer, P. Schilke, G. Schneider, J. Stutzki, G. Wieching, A. Wunsch, F. Wyrowski

Proceedings Volume 7020, 702010 (2008) https://doi.org/10.1117/12.788271

KEYWORDS: Telescopes, Receivers, Heterodyning, Spectrometers, Raster graphics, Calibration, Sensors, Field programmable gate arrays, Atmospheric optics, Optical filters

Read Abstract +

Proceedings Article | 12 July 2008 Paper

The Herschel-Heterodyne Instrument for the Far-Infrared (HIFI): instrument and pre-launch testing

7010-5Thijs de Graauw, Nick Whyborn, Frank Helmich, Pieter Dieleman, Peter Roelfsema, Emmanuel Caux, Tom Phillips, Jürgen Stutzki, Douwe Beintema, Arnold Benz, Nicolas Biver, Adwin Boogert, Francois Boulanger, Sergey Cherednichenko, Odile Coeur-Joly, Claudia Comito, Emmanuel Dartois, Albrecht de Jonge, Gert de Lange, Ian Delorme, Anna DiGiorgio, Luc Dubbeldam, Kevin Edwards, Michael Fich, Rolf Güsten, Fabrice Herpin, Netty Honingh, Robert Huisman, Herman Jacobs, Willem Jellema, Jon Kawamura, Do Kester, Teun Klapwijk, Thomas Klein, Jacob Kooi, Jean-Michel Krieg, Carsten Kramer, Bob Kruizenga, Wouter Laauwen, Bengt Larsson, Christian Leinz, Rene Liseau, Steve Lord, Willem Luinge, Anthony Marston, Harald Merkel, Rafael Moreno, Patrick Morris, Anthony Murphy, Albert Naber, Pere Planesas, Jesus Martin-Pintado, Micheal Olberg, Piotr Orleanski, Volker Ossenkopf, John Pearson, Michel Perault, Sabine Phillip, Mirek Rataj, Laurent Ravera, Paolo Saraceno, Rudolf Schieder, Frank Schmuelling, Ryszard Szczerba, Russell Shipman, David Teyssier, Charlotte Vastel, Huib Visser, Klaas Wildeman, Kees Wafelbakker, John Ward, Roonan Higgins, Henri Aarts, Xander Tielens, Peer Zaal

Proceedings Volume 7010, 701004 (2008) https://doi.org/10.1117/12.788659

KEYWORDS: Spectrometers, Astronomy, Acousto-optics, Switches, Stars, Oscillators, Calibration, Heterodyning, Spectral resolution, Signal processing

Read Abstract +

Proceedings Article | 27 June 2006 Paper

CHAMP⁺: a powerful array receiver for APEX

C. Kasemann, R. Güsten, S. Heyminck, B. Klein, T. Klein, S. Philipp, A. Korn, G. Schneider, A. Henseler, A. Baryshev, T. M. Klapwijk

Proceedings Volume 6275, 62750N (2006) https://doi.org/10.1117/12.670810

KEYWORDS: Mirrors, Optical correlators, Telescopes, Oscillators, Receivers, Heterodyning, Astronomy, Connectors, Temperature metrology, Amplifiers

Read Abstract +

Proceedings Article | 28 July 2000 Paper

Local oscillator system for the heterodyne instrument for FIRST (HIFI)

John Pearson, Rolf Guesten, Thomas Klein, Nick Whyborn

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.393982

KEYWORDS: Oscillators, Receivers, Amplifiers, Optical amplifiers, Control systems, Space operations, Waveguides, Polarization, Interfaces, Heterodyning

Read Abstract +

Proceedings Article | 31 July 1998 Paper

CHAMP: the Carbon Heterodyne Array of the MPIfR

Rolf Guesten, Geoffrey Ediss, Frederic Gueth, K. Gundlach, H. Hauschildt, Christoph Kasemann, Thomas Klein, Jacob Kooi, A. Korn, I. Kramer, Henry LeDuc, H. Mattes, K. Meyer, E. Perchtold, M. Pilz, R. Sachert, M. Scherschel, P. Schilke, G. Schneider, J. Schraml, Detlef Skaley, Ronald Stark, W. Wetzker, H. Wiedenhover, W. Wiedenhover, S. Wongsowijoto, F. Wyrowski

Proceedings Volume 3357, (1998) https://doi.org/10.1117/12.317349

KEYWORDS: Optical correlators, Carbon, Heterodyning, Spectral resolution, Telescopes, Single sideband modulation, Receivers, Image processing, Signal processing, Astronomy

Read Abstract +

Showing 5 of 6 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years