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This paper discusses spacecraft control using variable-speed CMGs. A new operational concept for VSCMGs is proposed. This new concept makes it possible to approximate the complex nonlinear system by a linear time-varying system (LTV). As a…

Optimization and Control · Mathematics 2018-09-19 Yaguang Yang

I review the present status of liquid mirror telescopes. In a nutshell: LMTs do work and several have been built and used. Extensive interferometric tests of liquid mirrors (the largest one having a diameter of 2.5 meters) show diffraction…

Astrophysics · Physics 2007-05-23 E. F. Borra

Mini-EUSO is a space experiment selected to be installed inside the International Space Station. It has a compact telescope with a large field of view ($44 $\times$ 44$ sq. deg.) focusing light on an array of photo-multipliers tubes in…

Instrumentation and Methods for Astrophysics · Physics 2019-07-02 Sara Turriziani , Jonah Ekelund , Katsuhiko Tsuno , Marco Casolino , Toshikazu Ebisuzaki

GREGOR is a new open solar telescope with an aperture of 1.5m. It replaces the former 45-cm Gregory Coude telescope on the Canary island Tenerife. The optical concept is that of a double Gregory system. The main and the elliptical mirrors…

The HEGRA--collaboration is operating a system of imaging atmospheric Cherenkov telescopes to search for sources of TeV-gamma-rays. Air showers are observed in stereoscopic mode with several telescopes simultaneously. To trigger the…

The AdvCam is a next-generation camera for the Large-Sized Telescopes of the Cherenkov Telescope Array Observatory, based on silicon photomultipliers. Its fully digital readout system enables the design of new, sophisticated trigger logic.…

Instrumentation and Methods for Astrophysics · Physics 2025-10-02 Leonid Burmistrov

We discuss work by the eSTAR project which demonstrates a fully closed loop autonomous system for the follow up of possible micro-lensing anomalies. Not only are the initial micro-lensing detections followed up in real time, but ongoing…

Astrophysics · Physics 2009-06-25 Alasdair Allan , Tim Naylor , Eric S. Saunders

The historical development of ground based astronomical telescopes leads us to expect that space-based astronomical telescopes will need to be operational for many decades. The exchange of scientific instruments in space will be a…

Instrumentation and Methods for Astrophysics · Physics 2015-06-04 N. Schartel

The next major advancement in astronomy and cosmology will be driven by deep observations using very sensitive telescopes with high spatial and spectral resolution capabilities. An international consortium of astronomers, including Indian…

Instrumentation and Methods for Astrophysics · Physics 2018-06-08 Warren Skidmore , G. C. Anupama , Raghunathan Srianand

Current large-aperture cosmic microwave background (CMB) telescopes have nearly maximized the number of detectors that can be illuminated while maintaining diffraction-limited image quality. The polarization-sensitive detector arrays being…

Instrumentation and Methods for Astrophysics · Physics 2016-04-20 Michael D. Niemack

Radio astronomy is vulnerable to interference from a variety of anthropogenic sources. Among the many strategies for mitigation of this interference is coherent time-domain canceling (CTC), which ideally allows one to "look through"…

Instrumentation and Methods for Astrophysics · Physics 2022-11-30 S. W. Ellingson , R. M. Buehrer

The KM3NeT neutrino telescope will be composed of many optical modules, each of them containing 31 (3") photomultipliers, connected to a Central Logic Board. The Central Logic Board integrates Time to Digital Converters that measure Time…

Instrumentation and Methods for Astrophysics · Physics 2015-06-23 S. Biagi , A. Orzelli

The open-source console MaRCoS, which stands for "Magnetic Resonance Control System", combines hardware, firmware and software elements for integral control of Magnetic Resonance Imaging (MRI) scanners. Previous developments have focused on…

Medical Physics · Physics 2025-07-29 J. M. Algarín , T. Guallart-Naval , J. Borreguero , F. Galve , J. Alonso

Cavity magnomechanics using mechanical degrees of freedom in ferromagnetic crystals provides a powerful platform for observing many interesting classical and quantum nonlinear phenomena in the emerging field of magnon spintronics. However,…

Chaotic Dynamics · Physics 2024-07-19 Jiao Peng , Zeng-Xing Liu , Ya-Fei Yu , Hao Xiong

The design and implementation of astronomical cameras based on the large-format CCD and CMOS detectors is described in this paper. The Dinacon-5 controller is used for work with the CCDs and to achieve high performance and low noise. A new…

Instrumentation and Methods for Astrophysics · Physics 2021-01-21 V. I. Ardilanov , V. A. Murzin , I. V. Afanasieva , N. G. Ivaschenko , M. A. Pritychenko

New challenges in submillimeter wave astronomy require instruments with a combination of high sensitivity and angular resolution, wide field of view and multiwave (multicolor) spectral range. New large single mm/submm telescopes are in high…

Instrumentation and Methods for Astrophysics · Physics 2020-08-28 R. Duan , V. Khaikin , M. Lebedev , V. Shmagin , G. Yakopov , V. Vdovin , G. Bubnov , X. Zhang , C. Niu , Di Li , I. Zinchenko

The Gemini Observatory is planning to implement a Multi Conjugate Adaptive Optics (MCAO) System as a facility instrument for the Gemini-South telescope. The system will include 5 Laser Guide Stars, 3 Natural Guide Stars, and 3 Deformable…

Other Computer Science · Computer Science 2015-06-25 C. Boyer , J. Sebag , B. Ellerbroek

This paper proposes a new robust control method for quantum systems with uncertainties involving sliding mode control (SMC). Sliding mode control is a widely used approach in classical control theory and industrial applications. We show…

Quantum Physics · Physics 2009-11-03 Daoyi Dong , Ian R. Petersen

Coherent control is extended to macroscopic processes under continuous pulsed laser irradiation. Here, this approach is used to analyze the experimentally measured two-photon phase control of currents emanating from a living brain cells…

Chemical Physics · Physics 2019-07-25 Cyrille Lavigne , Paul Brumer
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