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DTSTART;TZID=Europe/Paris:20260428T140000
DTEND;TZID=Europe/Paris:20260428T150000
DTSTAMP:20260406T125400
CREATED:20260326T140308Z
LAST-MODIFIED:20260326T140314Z
UID:10000110-1777384800-1777388400@sfp-alpes.fr
SUMMARY:Elizabeth TILLY (University of New Mexico)
DESCRIPTION:Directional Detection as a Tool for Rare-Event Searches\nRésumé : \nMeasuring the initial scattering angle of a particle track provides powerful discrimination in rare-event searches and can enhance detector characterization. The Migdal effect–characterized by a nuclear recoil and an electron recoil originating from the same vertex–is an inherently directional signal. In this talk\, I will present my work with the Migdal In Galactic Dark mAtter expLoration (MIGDAL) experiment which uses a GEM-based TPC. I will discuss the development of our 3D track reconstruction algorithms and studies exploiting its angular resolution to characterize detector response. I will also discuss measurements of drift properties in negative ion drift gas mixtures\, maximizing noble gas components with the aim of improving spatial resolution for MIGDAL Phase II. Together these demonstrate the power and versatility of precise directional track reconstruction for next-generation rare-event searches. \n— \nHanno Filter (College 3 Secretary) \nExternal visitors may ask for a site access to tellier@ill.fr
URL:https://sfp-alpes.fr/event/elizabeth-tilly-university-of-new-mexico/
LOCATION:ILL – Salle de Séminaire (110-111)\, ILL 50 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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DTSTART;TZID=Europe/Paris:20260430T080000
DTEND;TZID=Europe/Paris:20260430T090000
DTSTAMP:20260406T125400
CREATED:20260213T095231Z
LAST-MODIFIED:20260213T095238Z
UID:10000069-1777536000-1777539600@sfp-alpes.fr
SUMMARY:Emilie GAGNEPAIN & Vincent DATRY (Service : Clinique de Chirurgie Thoracique et Endocrinienne)
DESCRIPTION:Découverte fortuite\, décision réfléchie : l’incidentalome surrénalien en pratique\nContact : sante-communication@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/emilie-gagnepain-vincent-datry-service-clinique-de-chirurgie-thoracique-et-endocrinienne/
LOCATION:CHU – Salle Gilbert Faure\, CHU Grenoble Alpes Pavillon Vercors (côté Belledonne)\, La Tronche\, 38043\, France
CATEGORIES:Séminaire
ORGANIZER;CN="CHU Grenoble":MAILTO:sante-communication@univ-grenoble-alpes.fr
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DTSTART;TZID=Europe/Paris:20260505T090000
DTEND;TZID=Europe/Paris:20260505T100000
DTSTAMP:20260406T125400
CREATED:20260402T153041Z
LAST-MODIFIED:20260402T153041Z
UID:10000117-1777971600-1777975200@sfp-alpes.fr
SUMMARY:Yukiko TAKAHASHI (NIMS\, Japan)
DESCRIPTION:Material development for HAMR and its prospects\nRésumé : \n\n\nWith the rapid expansion of IoT and digital transformation\, data centers demand ever-higher storage densities. Heat-assisted magnetic recording (HAMR) employs L1₀-FePt\, whose magnetic anisotropy is an order of magnitude larger than that of conventional CoCrPt\, enabling ultrahigh-density recording. Achieving areal densities beyond 4 Tbit/in² requires granular films with grain sizes ~4.3 nm and narrow inter-grain pitch with ~1 nm [1]. However\, conventional segregant systems such as FePt-C and FePt-BN have not yet simultaneously satisfied the required microstructural and magnetic criteria.\n​​ To overcome this limitation\, we introduced a data- driven materials design framework using the NIMS Research Data Express (RDE) platform. By collecting experimental datasets and applying machine learning to FePt-C and FePt-BN systems\, we predicted sputtering conditions that led to FePt-BN-C granular films with sub-6 nm grain sizes and coercivities up to 3.7 T. Although iterative prediction cycles improved the microstructure to 4.9 nm grains\, the results also clarified the intrinsic difficulty of meeting all 4 Tbit/in² requirements within this materials system alone.\n​​Beyond materials optimization\, three-dimensional magnetic recording offers an additional pathway toward higher areal density. As a proof of concept\, FePt-C/Ru-C/FePt-C trilayers were fabricated\, demonstrating epitaxial stacking and distinct magnetic switching behaviors arising from different ordering states in the upper and lower FePt layers [2]. Strategies to improve the structural and magnetic quality of the upper layer will be discussed.\n​​\n​​ [1] D. Weller et al.\, IEEE Trans. Magn. 50\, 3100108 (2014).\n​​ [2] P. Tozman et al.\,Acta Mater. 271\, 119869 (2024).\n​​\nMore information : https://www.spintec.fr/seminar-material-development-for-hamr-and-its-prospects/​​\n​\nVisioconference : https://univ-grenoble-alpes-fr.zoom.us/j/98769867024?pwd=dXNnT3RMeThjYStybGVQSUN0TVdJdz09​​\n​​\n​– \n\n\n\n​ Accès : access to CEA require​s an entry au​thorization. Request it : admin.spintec@cea.fr​
URL:https://sfp-alpes.fr/event/yukiko-takahashi-nims-japan/
LOCATION:CEA – Salle de Séminaire IRIG (1005 – 445)\, Laboratoire Irig/Spintec\, salle de séminaire 445\, bâtiment 1005\, CEA-Grenoble\, Grenoble
CATEGORIES:Séminaire
ORGANIZER;CN="IRIG - CEA":MAILTO:odile.rossignol@cea.fr
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