Japan Atomic Energy Agency

Ikegami Tsushinki Co., Ltd.

Brookman Technology, Inc.

Sukegawa Electric Co., Ltd.

Tomoaki Takeuchi

Kunihiko Tsuchiya

Takashi Watanabe

Akira Shibata

Osamu Ozawa

Kuniaki Miura

Atsushi Kikuchi

Hiroshi Yamamoto

Noriaki Ohtsuka

Noriaki Hirota

Hiroko Nakano

Tomohiro Kamiyanagi

Hiroshi Nagata

A process of producing a fine-grained austenitic stainless steel, the process comprising a step of subjecting a fine-grained austenitic stainless steel comprising: C: 0.15 wt % or less, Si: 1.00 wt % or less, Mn: 2.0 wt % or less, Ni: 6.0 to 14.0 wt %, Cr: 16.0 to 22.0 wt %, and Mo: 3.0 wt % or less, with the balance being Fe and inevitable impurities, and having an average grain size of 10 &#x3bc;m or lower, to an annealing treatment at a temperature from 600&#xb0; C. to 700&#xb0; C. for 48 hours or longer.

Production process of fine-grained austenitic stainless steel

An optical-detection element includes a p-type supporting-layer, an n-type buried charge-generation region to implement a photodiode with the supporting-layer, a p-type shield region buried in the buried charge-generation region, a gate insulating-film contacted with the shield region, a transparent electrode on the gate insulating-film, a p-type well region buried in the supporting-layer, and an n-type charge-readout region buried in the supporting-layer at an edge of the well region toward the buried charge-generation region.

Optical-detection element, solid-state imaging device, and method for driving solid-state imaging device

A radiation tolerant optical detection element includes: a p-type base-body region; a gate insulating film provided on an upper surface of the base-body region; an n-type buried charge-generation region buried in an upper portion of the base-body region; an n-type charge-readout region buried in an upper portion of the base-body region on the inner-contour side of the buried charge-generation region; an n-type reset-drain region buried on the inner-contour side of the charge-readout region; a transparent electrode provided on the gate insulating film above the buried charge-generation region; and a reset-gate electrode provided on a portion of the gate insulating film between the charge-readout region and the reset-drain region.

Optical detection element and solid-state image pickup device

A self-powered gamma detector which can hold the influence of neutron rays to the minimum, and can measure the dose of gamma rays accurately under a high neutron environment in the reactor is disclosed. The self-powered gamma detector has a columnar emitter member; a collector member arranged in surroundings of the emitter member through an insulating member, and the strength of gamma rays is measured by detecting the value of a current which flows between the emitter member and an MI cable connected with the emitter member, and the collector member. Especially, the emitter member consists of pure tungsten (W), whose inevitable impurities is in 0.03 percent by weight or less.

Self-powered gamma detector

Growing community of inventors

Ibaraki, Japan

Tomoaki Takeuchi