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京都大学0048新制・課程博士博士(理学)甲第12647号理博第3089号新制||理||1461(附属図書館)UT51-2006-U352京都大学大学院理学研究科物理学・宇宙物理学専攻(主査)教授 今井 憲一, 教授 笹尾 登, 教授 植松 恒夫学位規則第4条第1項該当Doctor of ScienceKyoto UniversityDA

Test experiment for the 3-D spiral beam injection into a solenoidal magnet

研究成果の概要（和文）：ミューオンの異常磁気双極子(g-2)と電気双極子(EDM)の精密測定により新物理の存否をさぐる。過去30年近く踏襲された実験の系統誤差要因を根本から解決すべく、我々は新しい実験を推進している。新実験の要はサブppmで調整された磁場強度3Tの蓄積リングに運動量300MeV/cのビームを入射し、半径33㎝の蓄積リング内にビームを制御する手法の確立である。本申請研究では、新規考案したソレノイド型蓄積磁石への3次元的なビーム入射手法を実証するテストビームラインの建設および検証実験を行った。ビームの水平・垂直方向の運動の制御するX-Y結合の調整により、小型蓄積リング内でのビーム制御技術を実証できた。 研究成果の概要（英文）：The precise measurements of muon　anomalous magnetic moment (g-2) and electric dipole moment(EDM) investigate the existence of new physics. In order to fundamentally solve the systematic error factors of experiments that have been followed for nearly the past 30 years, we are promoting new experiment. One of major essences of the new experiment is the establishment of a method to control the beam into the compact storage ring with a radius of 33 cm. We inject a beam of momentum of 300 MeV / c into the storage ring of magnetic field strength 3 T adjusted by sub ppm. In this research project, we conducted a test beam line construction and a verification experiment demonstrating a three dimensional beam injection method to a newly invented solenoid type accumulating magnet. By adjusting the X - Y coupling that controls the horizontal and vertical motion of the beam, we can demonstrate the beam control technique in the small storage ring

Study on Field Measurement and Ground Vibration for Superconducting Solenoid of New g-2 Experiment at J-PARC

Basic R&Ds of a superconducting solenoid for a new g-2 experiment at J-PARC are on going. High uniformity of magnetic field below 0.1 ppm is required for the g-2 experiment within a storage region of 33.3±5 cm in radius and ±10 cm in height. Two R&Ds have been started to develop the magnet with such high uniformity; a development of a precise field monitoring system and a study of seismic ground vibration. The prototype monitoring system using continuous wave type NMR probe for horizontal MRI solenoid has been built and tested. Cross-check between NMR and Hall probe has been also carried out. The seismic ground vibration has been measured at Materials and Life science Facility, MLF, in J-PARC. Based on the measured results, the spectrum analysis of the iron yoke has been performed using ANSYS

Necrotizing Fasciitis Caused by Haemophilus influenzae Type b in an Elderly Patient▿

Necrotizing fasciitis caused by Haemophilus influenzae type b is a rare infection of the skin and soft tissues. The only previously reported case involved a healthy infant. We report herein the case of an 81-year-old Japanese woman with diabetes mellitus who developed necrotizing fasciitis caused by H. influenzae type b

Superconducting detector magnets for high energy physics

Various superconducting detector solenoids for particle physics have been developed in the world. The key technology is the aluminum-stabilized superconducting conductor for almost all the detector magnets in particle physics experiments. With the progress of the conductor, the coil fabrication technology has progressed as well, such as the inner coil winding technique, indirect cooling, transparent vacuum vessel, quench protection scheme using pure aluminum strips and so on. The detector solenoids design study is in progress for future big projects in Japan and Europe, that is, ILC, FCC and CLIC, based on the technologies established over many years. The combination of good mechanical properties and keeping a high RRR is a key point for the development of Al-stabilized conductor. The present concern for the detector solenoid development is to have been gradually losing the key technologies and experiences, because large-scale detector magnets with Al-stabilized conductor has not been fabricated after the success of CMS and ATLAS-CS in LHC. Complementary efforts are needed to resume an equivalent level of expertise, to extend the effort on research and to develop these technologies and apply them to future detector magnet projects. Especially, further effort is necessary for the industrial technology of Al-stabilized superconductor production. The worldwide collaboration with relevant institutes and industries will be critically important to re-realize and validate the required performances. Some detector solenoids for mid-scale experiment wound with conventional copper-stabilized Nb-Ti conductor require precise control of magnetic field distribution. The development efforts are on-going in terms of the magnetic field design technology with high precision simulation, coil fabrication technology and control method of magnetic field distribution.Comment: 35 pages, 35 figures, 8 tables, contribution to Snowmass 202