Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

National Institutes for Quantum and Radiological Science and Technology

Takashi Yazawa

Takeshi Yoshiyuki

Yoshifumi Nagamoto

Shigeki Takayama

Tomofumi Orikasa

Yoshiharu Kanai

Ikuo Watanabe

Takuji Furukawa

Yutaka Yamada

Toru Kuriyama

Reiko Fujita

Koji Mizuguchi

Akiko Kakutani

Yumi Yaita

Kiyokazu Sato

Satoshi Yasuda

Shunji Nomura

Kei Koyanagi

Yuya Takahashi

Ikuo Tashiro

Shohei Kanamura

Hideaki Maeda

Takashi Omori

Tamaki Masegi

Tetsuo Osato

Yu Yamashita

Kosuke Sato

Kazutaka Yamamoto

According to one embodiment, a particle beam therapy system comprising: a circular accelerator configured to accelerate charged particles; a beam transportation line configured to lead the charged particles accelerated by the circular accelerator to an irradiation room; a shielding wall that is disposed around a radiation controlled area and shields radiation to be generated from the circular accelerator and the beam transportation line, the radiation controlled area being an area where the circular accelerator and the beam transportation line are disposed; a specific portion that is provided at a position that separates the radiation controlled area from outside of the shielding wall and can form an additional opening portion of the irradiation room; and a blocking portion configured to close the specific portion and shield radiation passing through the specific portion.

Particle beam therapy system, particle beam therapy system construction method, and particle beam therapy apparatus

Provide a particle beam transport system that contribute to reduction of construction period and cost for a particle beam treatment facility including plural treatment rooms accommodating a particle-beam irradiation equipment. A particle beam transport systemincludes: a main lineconfigured to transport a particle beam generated by an accelerator outward; a branch linebranching from the main line; irradiation equipments(-) provided at respective ends of the branch lineand configured to irradiate a patient with the particle beam, wherein at least a part of the main lineand the branch lineis configured as plural segments; and beam characteristics of the particle beam of each of the plural segmentsare substantially equal at both ends.

Particle beam transport system, and segment thereof

A particle-beam control electromagnet capable of shortening a transportation path of a particle beam and an irradiation treatment apparatus which contributes to miniaturization and weight reduction of the rotating gantry supporting this control electromagnet are provided. The electromagnet includes a first superconducting coil group, a second superconducting coil group, and a vacuum vessel. The first superconducting coil group forms at least one of a bending magnetic field and a focus/defocus magnetic field. The second superconducting coil group is placed around the trajectory of the particle beam at the end of the first superconducting coil group and forms correction magnetic fields for correcting the trajectory of the particle beam. The vacuum vessel hermetically houses the first superconducting coil group, the second superconducting coil group, and a cooling medium, and insulates from the outside air.

Particle-beam control electromagnet and irradiation treatment apparatus equipped therewith

A charged particle beam irradiation apparatus according to an embodiment includes: a first scanning electromagnet device configured to deflect a charged particle beam to a second direction that is substantially perpendicular to a first direction along which the charged particle beam enters, the first scanning electromagnet device having an aperture on an outlet side larger than that on an inlet side; and a second scanning electromagnet device configured to deflect the charged particle beam to a third direction that is substantially perpendicular to the first direction and the second direction, the second scanning electromagnet device having an aperture on an outlet side larger than that on an inlet side, the first scanning electromagnet device and the second scanning electromagnet device being disposed to be parallel with the first direction.

Charged particle beam irradiation apparatus

One embodiment of a particle accelerator includes: a particle source from which a particle beam is extracted with a beam pulse width of not greater than 2 &#x3bc;sec; a linear accelerator for accelerating the particle beam extracted from the particle source; a synchrotron for receiving the particle beam transported thereto from the linear accelerator and causing the particle beam to circulate in order to accelerate it until it gets to a predetermined energy level; a bump electromagnet for shifting the circulating path of the particle beam each time it makes a full turn; and a control unit for controlling the extent of magnetic excitation of the bump electromagnet and for controlling the timing of magnetic excitation of the bump electromagnet according to the pulse timing of the particle source.

Particle accelerator and medical equipment

According to one embodiment, a process for producing rare metals includes the steps of: recovering a first-residue solution through a primary target metal extracted by leaching a mineral resource; extracting a perrhenic acid ion contained in the first-residue solution with at least one of an anion exchange resin and a first-organic solvent; back extracting the perrhenic acid ion contained in the anion exchange resin or the first-organic solvent to a first-eluant; and electrolyzing the back extracted first-eluant to collect a rhenium at a cathode.

Process for producing rare metal

The superconducting magnet apparatus includes a cryostat, a superconducting coil provided in the cryostat, and a current lead having a portion made of an oxide superconductor, for supplying a current to the superconducting coil. The portion of the current lead which is made of the oxide superconductor has a high-temperature end and a low-temperature end, and the current lead is arranged such that the direction of a current flow in at least the high-temperature end and the direction of a leakage magnetic flux applied from the superconducting coil to the high-temperature end are made substantially in parallel to each other.

Superconducting magnet apparatus

A superconducting magnet is arranged in a helium tank, and the superconducting magnet cooled to a very low temperature by liquid helium in the helium tank is connected to a power source kept at room temperature by a current lead and a current lead. The current leads are constituted by conductors made of copper or a copper alloy having a residual resistivity of 5.times.10.sup.-8 .OMEGA..multidot.m or more. In a helium tank, a persistent current switch, cooled by liquid helium, for connecting the conductor to the conductor, is arranged. The persistent current switch magnetizes the superconducting magnet to a persistent current mode and demagnetizes it from the persistent current mode. The helium tank is arranged in a vacuum housing.

Current lead

A superconducting magnet apparatus such as a superconducting magnet for supplying a levitating force to a magnetically levitating train comprises a closed loop-shaped superconducting coil, a container for containing the superconducting coil, a coolant contained in the container, for keeping the superconduction state of the superconducting coil, a metallic member situated outside the container, and path apparatus situated outside the container, for suppressing heat which is generated in the container, the path apparatus having an electric conductivity higher than that of the container and being made of a superconducting wire for causing eddy current occurring outside the container to flow with a small quantity of heat generated.

Growing community of inventors

Ota, Japan

Takashi Yazawa