SPICA: a joint infrared space observatory (Conference Presentation)

Roelfsema, Peter; Shibai, Hiroshi; Wafelbakker, Kees; Lange, Gert de; Giard, M.; Najarro, F.; Audard, M.; Armus, L.; Bradford, Charles M.; Doi, Yasuo; Griffin, Matt; Helmich, Frank; Kamp, I.; Kaneda, Hidehiro; Kemper, Ciska; Kerschbaum, F.; Kohno, Kotaro; Krause, O.; Larsson, Bengt; Madden, Sue; Matsuhara, Hideo; Naylor, David; Ogawa, H.; Onaka, Takashi; Spinoglio, L.; Tak, F. F. S. van der; Vandenbussche, B.; Yamada, Tōru

doi:10.1117/12.2313124

Cited by 2 publications

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“…The echelle spectrograph in which spectrum is folded on to a photographic plate or a 2-dimensional imaging detector, combines a high-order diffraction grating with a prism or a diffraction grating with low angular dispersion as a cross disperser. In the reasons, a transmission grating of echelle type with large angular dispersion and with high diffraction efficiency is required for an astronomical spectrograph of a large telescope such as the TMT (Thirty Meter telescope), the 8.2m Subaru Telescope [1][2][3][4][5][6][7]. Propagation of incident beam in SR transmission grating with sawtooth shape ridges (left), diffraction efficiency versus lattice period normalized by peek wavelength (middle) [2,7,8] and grisms (direct vision grating) for FOCAS (right).…”

Section: Introductionmentioning

confidence: 99%

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Novel gratings for astronomical observations

Ebizuka

Okamoto

Takeda

et al. 2019

International Conference on Space Optics — ICSO 2018

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We introduce novel gratings for next generation instruments of the TMT (Thirty Meter Telescope), the 8.2 m Subaru telescope, other ground-based and space-borne telescopes. The reflector facet transmission (RFT) grating which is a surface relief grating with sawtooth shaped grating lattice of an acute vertex angle, is developed for the WFOS of the TMT. The hybrid grism (direct vision grating) for the MOIRCSof the 8.2m Subaru Telescope is developed as a prototype of the RFT grating. The volume binary grating is developed for a high-dispersion echelle grism of the nuMOIRCS as the first light instrument of the ULTIMATE Subaru. We also developing a silicon grism for the MIMIZUKU of the 6.5m telescope of the University of Tokyo Atacama Observatory in Chile and a quasi-Bragg (QB) immersion grating.

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Section: Introductionmentioning

confidence: 99%

“…Fabrication process of SR transmission grating (left)[7], fabrication by shaper cutting (middle) and SEM photograph of grating lattice (right) of RFT grating.…”

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confidence: 99%

Novel gratings for astronomical observations

Ebizuka

Okamoto

Takeda

et al. 2019

International Conference on Space Optics — ICSO 2018

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A six-degree-of-freedom micro-vibration acoustic isolator for low-temperature radiation detectors based on superconducting transition-edge sensors

Gottardi

Weers

Dercksen

et al. 2019

Review of Scientific Instruments

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Dilution and adiabatic demagnetization refrigerators based on pulse tube cryocoolers are nowadays used in many low temperature physics experiments, such as atomic force and scanning tunneling microscopy, quantum computing, radiation detectors, and many others. A pulse tube refrigerator greatly simplifies the laboratory activities being a cryogen-free system. The major disadvantage of a pulse tube cooler is the high level of mechanical vibrations at the warm and cold interfaces that could substantially affect the performance of very sensitive cryogenic instruments. In this paper, we describe the performance of a very simple mechanical attenuation system used to eliminate the pulse-tube-induced low frequency noise of the superconducting transition-edge sensors under development for the instruments of the next generation of infra-red and X-ray space observatories.

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SPICA: a joint infrared space observatory (Conference Presentation)

Cited by 2 publications

References 0 publications

Novel gratings for astronomical observations

Novel gratings for astronomical observations

A six-degree-of-freedom micro-vibration acoustic isolator for low-temperature radiation detectors based on superconducting transition-edge sensors

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