Dai Nippon Printing Co., Ltd.

Japan Science and Technology Corporation

Kyoto University

Toru Tanimori

Atsushi Takada

Tomohisa Motomura

Osamu Shimada

Atsuhiko Ochi

Kohei Ota

Hiroki Maeda

Ryoichi Ohigashi

Kazuyoshi Togashi

Tetsuya Mizumoto

Dai Tomono

Taito Takemura

A detection device for detecting radiation includes a container including a first portion, a second portion facing the first portion in a first direction, and a side portion extending from the first portion toward the second portion, where a gas is contained in the container, an electron detector located inside the container, where the electron detector detects an electron generated by Compton scattering, a drift electrode located inside the container closer to the second portion than the electron detector and facing the electron detector, and a radiation detector located closer to the second portion than the drift electrode, where the radiation detector detects scattered radiation.

Detection device

A radiation detection element includes a base material, a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, a first external terminal, a second external terminal, a third external terminal, and a fourth external terminal. Each of the first external terminal, the second external terminal, the third external terminal, and the fourth external terminal is a solder ball, and the first external terminal, the second external terminal, the third external terminal, and the fourth external terminal are insulated from each other. A region provided on the first electrode, the second electrode, the third electrode, the fourth electrode, and the fifth electrode overlaps at least one of the first external terminal, the second external terminal, the third external terminal, and the fourth external terminal in a view vertical to the first surface side of the base material.

Radiation detection element

A radiation detection device includes a detection element including a substrate having a first surface and a second surface, a first electrode on the first surface, a second electrode adjacent to the first electrode in a first direction, a third electrode adjacent to the first electrode in a second direction; a fourth electrode adjacent to the third electrode in the first direction and adjacent to the second electrode in the second direction and a fifth electrode on the first surface and between the first and second electrode, between the first and third electrode, between the second and fourth electrode, and between the third and fourth electrode; a wiring layer on the second surface and including a first wiring, a second wiring, a third wiring, and a fourth wiring; and a circuit element opposite to the wiring layer and connected to the first to fourth wiring.

Radiation detection device

A detection element includes an exposed electrode on the first surface of an insulating substrate, the exposed electrode including first exposed electrode, second exposed electrode, third exposed electrode, and fourth exposed electrode provided; a first electrode pattern provided on a side opposite to the first surface, the first electrode pattern including a pattern connected to the first exposed electrode and the second exposed electrode, a pattern connected to the third exposed electrode and the fourth exposed electrode, a second electrode pattern having a first exposed portion and a pattern provided along the second direction, and a third electrode pattern having a second exposed portion and a pattern provided along the third direction, provided so as to sandwich the third electrode pattern between the first electrode pattern and the second electrode pattern.

Detection element, radiation detection device, and compton camera

A gamma-ray image acquisition device () acquires the direction and energy of a target scattered gamma-ray generated by Compton scattering of an incident gamma-ray and acquires the direction and energy of a recoil electron. These pieces of information are used to acquire the incident direction and energy of the incident gamma-ray. The gamma-ray image acquisition device () acquires a two-dimensional image by imaging spectroscopy based on the incident directions and energies of a plurality of incident gamma-rays, the two-dimensional image being an image in which each pixel corresponding to each incident direction includes energy distribution information. In the two-dimensional image, the area and the solid angle of an imaging range are proportional to each other. This enables acquiring the distribution of gamma-ray intensities without depending on distance and thereby acquiring an image that indicates more useful information than conventional images.

Gamma-ray image acquisition device and gamma-ray image acquisition method

A radiation detection element includes a plurality of pixel electrodes, each pixel electrodes including a first electrode placed on the first surface of an insulating member and having an opening portion and a second electrode placed at the opening portion of the first electrode. The plurality of pixel electrodes is arrayed in the row direction and the column direction. The pitch of the pixel electrodes in the row direction and the column direction is 380 &#x3bc;m or less. An area ratio between the first electrode and the second electrode falls within the range of 14.5:1 to 154.6:1.

Radiation detection element and radiation detection device

A particle beam image detector employing gas amplification attained by pixel-type electrodes has high sensitivity and improved reliability of electrodes. Electrons e produced through ionization of the gas move under the force of a drift field toward a pixel in the form of a columnar anode electrode. Avalanche amplification occurs in the vicinity of the columnar anode electrode due to a strong electric field between anode and cathode and the pointed shape of the electrode. The positive ions quickly drift toward strip-shaped cathode electrodes. Electric charges are generated on the columnar anode electrodes and also on the strip-shaped cathodes and these electric charges are observable to determine the anode or cathode strip at which this amplification phenomenon occurs and thus to obtain information as to position of the incident particle beam.

Corpuscular beam image detector using gas amplification by pixel type electrodes

An imaging microstrip gas chamber (MSGC) high-speed data acquisition system capable of processing at high speed a large number of output signals of an imaging microstrip gas chamber. The system includes discrimination circuits for binary conversion of signals from anode strips and back strips of a two-dimensional microstrip gas chamber; signal synchronizing circuits for converting binary asynchronous signals output from the discrimination circuits into clock-synchronized signals; data encoder circuits connected to the signal synchronizing circuits; an incident-particle hit judgment circuit connected to the data encoder circuits and operating such that when a plurality of adjacent signal lines receive signals at the same timing, a value corresponding to a signal line at the center of the adjacent signal lines is output, and when separated signal lines receive signals at the same timing, the signals are ignored; a storage device connected to the incident-particle hit judgment circuit and adapted to store, for each event, the vertical and horizontal coordinates of an incident particle, the timing of incidence of the particle, the degree of spreading of output signals, and the energy of the incident particle obtained from an overall pulse height; and a computer connected to the storage device.

Growing community of inventors

Kyoto, Japan

Toru Tanimori