• 日時：2023年7月20日（木）15：10～16：40
• 場所：吹田キャンパス　核物理研究センター本館6階　講義室１

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1.　 Photo-induced phase transition of samarium mono-sulfide revealed by time-resolved photoelectron Spectroscopy and time-resolved x-ray diffraction

Presenter: 陳 奕同（チン ヤクドウ　CHEN Yitong）

Abstract: Samarium mono-sulfide (SmS) shows a pressure-induced phase transition from a black-colored semiconductor to a golden-colored semimetal (black-to-golden phase transition: BGT), together with lattice shrinking and increasing mean valence of Sm ions. We are trying to realize the BGT from other possible approaches. In this seminar, we introduce the time development of photo-induced variation of electronic state and lattice constant of SmS using time-resolved spectroscopy/diffraction.

2. Conceptual Design of a High Temperature Superconducting Spectroscopy-Type Gantry System for Particle Therapy

Presenter: ZHAO Hang

Abstract: Radiation therapy is a kind of extremely efficient cancer treatment that uses high doses of radiation to kill cancer cells. In radiation therapy with high energy particles, the dose is usually applied to the tumor with irradiation from several directions, to limit the dose in healthy tissue in vicinity of the tumor. In order to realize a continuous angular range of irradiation, a spectroscopy-type beam delivery device (i.e. the gantry) is proposed. In this work, a conceptual design of a high temperature superconducting spectroscopy-type gantry system will be present.