Prof. Tadayuki Takahashi Profile

Prof. Tadayuki Takahashi

Professor at Institute of Space and Astronautical Science

SPIE Involvement:

Conference Program Committee | Conference Chair | Author | Editor

Publications (89)

PROCEEDINGS ARTICLE | August 29, 2017

Calibration of the hard x-ray detectors for the FOXSI solar sounding rocket

Proc. SPIE. 10397, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX

KEYWORDS: Sensors, Calibration, X-ray optics, Hard x-rays, X-rays, Rockets, Sun, Imaging systems, Silicon

Read Abstract

PROCEEDINGS ARTICLE | September 30, 2016

Effects on hard x-ray response of a double-sided Si strip detector caused by interstrip surface charge

Proc. SPIE. 9968, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVIII

KEYWORDS: X-rays, Silicon, Hard x-rays, Sensors, X-ray imaging, X-ray detectors, Silica, Electrons, Photons, Signal detection

Read Abstract

SPIE Conference Volume | September 23, 2016

Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray

PROCEEDINGS ARTICLE | August 1, 2016

A broadband x-ray imaging spectroscopy with high-angular resolution: the FORCE mission

Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray

KEYWORDS: X-rays, Hard x-rays, Sensors, Mirrors, X-ray imaging, Spatial resolution, Imaging spectroscopy, Galactic astronomy, Silicon, Bohrium

Read Abstract

We are proposing FORCE (Focusing On Relativistic universe and Cosmic Evolution) as a future Japan-lead Xray observatory to be launched in the mid 2020s. Hitomi (ASTRO-H) possesses a suite of sensitive instruments enabling the highest energy-resolution spectroscopy in soft X-ray band, a broadband X-ray imaging spectroscopy in soft and hard X-ray bands, and further high energy coverage up to soft gamma-ray band. FORCE is the direct successor to the broadband X-ray imaging spectroscopy aspect of Hitomi (ASTRO-H) with significantly higher angular resolution. The current design of FORCE defines energy band pass of 1-80 keV with angular resolution of < 15 in half-power diameter, achieving a 10 times higher sensitivity above 10 keV compared to any previous missions with simultaneous soft X-ray coverage. Our primary scientific objective is to trace the cosmic formation history by searching for "missing black holes" in various mass-scales: "buried supermassive black holes (SMBHs)" (> 10⁴ M_☉) residing in the center of galaxies in a cosmological distance, "intermediate-mass black holes" (10²–10⁴ M_☉) acting as the possible seeds from which SMBHs grow, and "orphan stellar-mass black holes" (< 10² M_☉) without companion in our Galaxy. In addition to these missing BHs, hunting for the nature of relativistic particles at various astrophysical shocks is also in our scope, utilizing the broadband X-ray coverage with high angular-resolution. FORCE are going to open a new era in these fields. The satellite is proposed to be launched with the Epsilon vehicle that is a Japanese current solid-fuel rocket. FORCE carries three identical pairs of Super-mirror and wide-band X-ray detector. The focal length is currently planned to be 10 m. The silicon mirror with multi-layer coating is our primary choice to achieve lightweight, good angular optics. The detector is a descendant of hard X-ray imager onboard Hitomi (ASTRO-H) replacing its silicon strip detector with SOI-CMOS silicon pixel detector, allowing an extension of the low energy threshold down to 1 keV or even less.

PROCEEDINGS ARTICLE | July 27, 2016

Compact hard x-ray imaging system with a large FOV

Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray

KEYWORDS: Hard x-rays, Imaging systems, Sensors, X-rays, Spatial resolution, Prototyping, X-ray imaging, Monte Carlo methods, Aluminum, Image resolution

Read Abstract

PROCEEDINGS ARTICLE | July 25, 2016

The hard x-ray imager (HXI) onboard ASTRO-H

Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray

KEYWORDS: Imaging systems, X-rays, Sensors, Hard x-rays, Satellites, X-ray telescopes, Avalanche photodetectors, Cameras, Calibration, Lead

Read Abstract

PROCEEDINGS ARTICLE | July 20, 2016

The soft gamma-ray detector (SGD) onboard ASTRO-H

Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray

KEYWORDS: Sensors, Gamma radiation, Cameras, Silicon, Satellites, Avalanche photodetectors, Collimators, Monte Carlo methods, Physics, Aluminum

Read Abstract

PROCEEDINGS ARTICLE | July 20, 2016

The ASTRO-H (Hitomi) x-ray astronomy satellite

Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray

KEYWORDS: X-rays, X-ray astronomy, Sensors, Satellites, X-ray telescopes, Space operations, Physics, Space telescopes, Aerospace engineering, Calibration

Read Abstract

PROCEEDINGS ARTICLE | July 18, 2016

The FOXSI solar sounding rocket campaigns

Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray

KEYWORDS: Rockets, X-ray optics, Sun, Sensors, Solar energy, Silicon, X-ray optics, Electrons, Mirrors, Solar processes, Target detection

Read Abstract

PROCEEDINGS ARTICLE | July 11, 2016

Vibration isolation system for cryocoolers of Soft X-ray Spectrometer (SXS) onboard ASTRO-H (Hitomi)

Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray

KEYWORDS: Vibration isolation, Sensors, Cryocoolers, X-rays, Spectroscopy, X-rays, Space operations, Temperature metrology, Fermium, Frequency modulation, Head

Read Abstract

SPIE Conference Volume | August 28, 2014

Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray

PROCEEDINGS ARTICLE | July 31, 2014

The Large Observatory for x-ray timing