A5077160349- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Physics of Superconductivity and Magnetism
- Polymer crystallization and properties
- Particle Accelerators and Free-Electron Lasers
- Synthesis and properties of polymers
- Radiation Therapy and Dosimetry
- Polymer Nanocomposites and Properties
- Atomic and Subatomic Physics Research
- Spacecraft and Cryogenic Technologies
- biodegradable polymer synthesis and properties
- Advanced Polymer Synthesis and Characterization
- Advanced DC-DC Converters
- HVDC Systems and Fault Protection
- Polymer composites and self-healing
- Force Microscopy Techniques and Applications
- Magnetic and transport properties of perovskites and related materials
- Polymer Foaming and Composites
- Catalysis and Hydrodesulfurization Studies
- Polymer Science and Applications
- Material Properties and Applications
- Epoxy Resin Curing Processes
- Electrophoretic Deposition in Materials Science
- Photopolymerization techniques and applications
- Radiation Effects in Electronics
Kansai Photon Science Institute
2023
National Institutes for Quantum Science and Technology
2020-2023
Toshiba (Japan)
2012-2023
Kyoto University
2020
Kyoto Katsura Hospital
2020
High Energy Accelerator Research Organization
2020
Asahi Kasei (Japan)
2009-2011
Kyushu Institute of Technology
2006-2009
FIZ Karlsruhe – Leibniz Institute for Information Infrastructure
2008
Gifu Prefectural Research Institute for Fisheries and Aquatic Environments
2001
A superconducting rotating gantry for heavy-ion therapy is being designed. This isocentric can transport heavy ions with the maximum energy of $430\text{ }\text{ }\mathrm{MeV}/u$ to an isocenter irradiation angles over 0--360 degrees, and further capable performing three-dimensional raster-scanning irradiation. The combined-function magnets will be employed gantry. optimized beam optics allow a compact design large scan size at isocenter; length radius approximately 13 5.5 m, respectively,...
This paper describes the design and reports test results of world's most compact rotating gantry for a heavy-ion therapy system mounted with superconducting bending focusing magnets. A is cylindrical irradiation equipment magnets beam transport scanning that delivers energetic carbon ions at up to 430 MeV/u precisely tumor from any direction without changing posture patient. However, because high magnetic rigidity therapeutic ions, was too big be installed general hospitals. Therefore, had...
A compact synchrotron is now under development at the National Institutes for Quantum Science and Technology (QST), with goal of downsizing heavy-ion therapy system superconducting magnets conduction-cooled by GM cryocoolers. The required to accelerate several kinds beams from 4 MeV/u 430 MeV/u. magnet both dipole quadrupole coils adopted generate a field 0.3 3.5 T 0.1 1.5 T/m ramp rate 0.6 T/s. coil winding pattern iron yoke are optimized achieve homogeneity in area. For small-scale...
Combined-function superconducting magnets are designed for a heavy-ion rotating gantry. The coils of these have surface winding coil structure. To minimize sagitta, the as well their curved shape. Ten installed on With magnets, gantry can transport carbon ions having 430 MeV/u to patient with irradiation angles over ±180 degrees, and is further capable performing three-dimensional raster-scanning irradiation. Since would be rotated by compact cryocoolers employed cooling coil. Because has...
A project to develop a next-generation small facility for heavy-ion radiotherapy called Quantum Scalpel is underway at the National Institutes Science and Technology (QST), having started in 2016. One of aims this downsize synchrotron by applying superconducting technology. With view accomplishing this, we have been developing magnet compact collaboration with QST. This can generate dipole field 3.5 T an operating current 265 A. It adopts conduction cooling GM cryocoolers designed be able...
With the advances made in accelerator technologies, particle accelerators are being employed a wide range of fields such as physics, biology, and medical treatment. However, diameters main rings most large; for example, even smallest carbon cancer therapy has ring diameter approximately 20 m. Since rotating gantry carbon-ion beam is also very large compared with proton beam, widespread adoption this system been restricted. In order to promote accelerators, it necessary reduce bending radius...
The flame retardancy and the rearrangement reaction of polyphenylene-ether [poly-(oxy-2,6-dimethyl-1,4-phenylene), PPE] polyphenylene-ether/polystyrene (PS) alloys have been studied. PPE blended with phosphates was proportional to content as well phosphates. surface temperatures during a combustion higher than that PS, whereas is more flammable PS. element analysis polymer showed carbon richer compared newly synthesized PPE. Four monomeric eight dimeric scission products were recovered by...
A project to develop fundamental technologies for accelerator magnets using high-T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> superconductors is currently underway. The primary applications in this are fixed field alternating gradient (FFAG) accelerators carbon cancer therapy systems and accelerator-driven subcritical reactors. One of the challenging issues study accomplish complicated coil shape required YBa...
Carbon ion cancer therapy is becoming more widespread due to its high curative effects and low burden on patients. ions are delivered patients through electromagnets a rotating gantry.A gantry attractive because it allows carbon irradiate tumor from any direction without changing the posture of patient. On other hand, magnetic rigidity ions, weight for about three times higher than one proton therapy, according our estimation. The use high-temperature superconducting (HTS) magnets has been...
An R&D project funded by the Japan Science and Technology Agency under its S-Innovation Program is currently in progress. The purpose of this to develop fundamental technologies for accelerator magnets with REBCO coils. In first step project, winding technology fabricating coils required HTS was developed. At last stage there are plans fabricate cryocooler-cooled evaluate beam guiding characteristics stability against injection at line Heavy Ion Medical Accelerator Chiba (HIMAC). This paper...
Heavy-ion radiotherapy has a high curative effect in cancer treatment and also can reduce the burden on patients. These advantages have been generally recognized. Furthermore, rotating gantry irradiate tumor with ions from any direction without changing position of patient. This physical dose normal cells, is thus commonly used proton radiotherapy. However, because magnetic rigidity carbon ions, weight for heavy-ion therapy about three-times heavier than those therapy, according to our...
A project to develop a compact heavy-ion radiotherapy system is underway at the National Institutes for Quantum Science and Technology (QST). One of aims this downsize synchrotron by applying superconducting technology, we have been developing magnet in collaboration with QST. This was designed generate dipole field 3.5 T rapid cycle more than 0.64 T/s conduction cooling method using 4 K Gifford-McMahon (GM) cryocoolers. Such high-speed excitation generates large AC loss, heat generation one...
We report a measurement of the field quality dipole magnet whose coils were wound by YBCO coated conductor. The was made to study feasibility application high T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> superconducting rotating-gantry system for heavy-ion therapy. cooled down 3.4 K, and maximum 1.2 achieved at operating current 153 A. evaluated using harmonic coil system. As result, we observed larger contribution especially from...
A project to develop fundamental technologies for accelerator magnets using high-T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> superconductors is currently underway. In this project, conceptual design studies of fixed-field alternating gradient (FFAG) accelerators carbon cancer therapy and accelerator-driven subcritical reactors have been carried out. To establish cryocooler-cooled superconducting (HTS) wound with coated conductors,...
Carbon ion cancer therapy is becoming more widespread due to its high curative effects and low burden on patients. In particle therapy, it desirable that the treatment beam irradiates tumor from different directions in order reduce dose normal cells. A rotating gantry a suitable apparatus for meeting this requirement. Since irradiation device orbits patient inside gantry, can irradiate any direction without changing posture of patient. Rotating gantries are already commonly used proton...
A synchrotron using superconducting magnets has been designed for a next-generation heavy-ion therapy system at National Institutes Quantum Science and Technology. The maximum central field ramp rate of their are 3.5 T 0.7 T/s, respectively, homogeneity 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">–4</sup> unit is required. To verify generation thermal characteristics, prototype magnet was fabricated. This first as short-straight model...
Physical and dynamic viscoelastic properties of the blends polyphenylene-ether (PPE) aromatic low molecular weight compounds with specific chemical structure were studied. As a result, flexural modulus increase was observed by blending phosphates, phthalic esters, or amine, which had similar to phosphates. The maximum 2.94 MPa, whereas PPE alone showed 2.45 MPa. There trend that increased according phosphate, though dependence very small for esters. By calculating interaction between chains...
This paper describes a bipolar outputs DC-DC converter that uses single inductor for size and cost reduction. We propose timing diagram charge pump circuit in the negative voltage generation part, present its configuration, operation principle simulation results. also show employing pseudo-continuous conduction mode improves cross-regulation between two outputs.