Current and future Subaru instruments

Iye, Masanori

doi:10.1117/12.672806

Cited by 2 publications

(1 citation statement)

References 26 publications

(8 reference statements)

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“…IRHS (mid-InfRared High dispersion Spectrograph, tentative name), candidate of second generations instrument of the 8.2 m Subaru Telescope (National Astronomical Observatory of Japan: NAOJ) [4,5], is aiming R ~ 200,000 at 10µm in order to observe vibrational transitions of molecule in circum-stellar and dark clouds for instance. IRHS requires a disperser with minimum 2 m in an optical path difference.…”

Section: Novel Immersion Gratingmentioning

confidence: 99%

Novel immersion grating, VPH grating and quasi-Bragg grating

et al. 2006

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We have successfully fabricated germanium immersion gratings with resolving power of 45,000 at 10 µm by using a nano precision 3D grinding machine and ELID (ELectrolytic In-process Dressing) method. However the method spends large amount of machine times. We propose grooves shape with a new principle for a solid grating, which achieves high performance and lower cost.We have developed volume phase holographic (VPH) grisms with zinc selenide (ZnSe) prisms for spectrograph of the Subaru Telescope and the other telescopes. While a VPH grism with high index prisms achieves higher dispersion, diffraction efficiency of VPH grating decreases toward higher orders. A "quasi-Bragg grating" which inherits advantage of a VPH grating achieves high diffraction efficiency toward higher orders.Wavelength tuners with a pair of counter-rotation prisms for a VPH and quasi-Bragg grating obtain high diffraction efficiency over wide wavelength range. The novel immersion grating, VPH grism with high index prisms, quasi-Bragg grating and wavelength tuners dramatically reduce volumes of astronomical spectrographs.

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Section: Novel Immersion Gratingmentioning

confidence: 99%

Novel immersion grating, VPH grating and quasi-Bragg grating

et al. 2006

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Direct Dark Matter search using CCDs

Estrada

2010

J. Phys.: Conf. Ser.

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There is currently vast evidence for Dark Matter (DM) from astronomical observations. However, in spite of tremendous efforts by large experimental groups, there is no confirmed direct detection of the dark matter in our galaxy. Recent experimental results and theoretical developments suggest the possibility of a DM particle with mass below 10 GeV, such a particle would escape most of the direct searches due to the large thresholds for the detection of nuclear recoils typically used. In this work we study the possibility of a new Dark Matter search with an unprecedented low threshold for the detection of nuclear recoils using high-resistivity CCD detectors (hr-CCD). Due to their extremely low readout noise and the relatively large active mass, these detectors present a unique opportunity in this field.

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Current and future Subaru instruments

Abstract: The status and performance of the first-generation instruments of the Subaru Telescope are reviewed together with their open use statistics and some of the science outcomes. Four second-generation instruments under fabrication are also introduced.

Cited by 2 publications

References 26 publications

Novel immersion grating, VPH grating and quasi-Bragg grating

Novel immersion grating, VPH grating and quasi-Bragg grating

Direct Dark Matter search using CCDs

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