BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Europe/Rome BEGIN:DAYLIGHT DTSTART:20260329T030000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 TZNAME:CEST END:DAYLIGHT BEGIN:STANDARD DTSTART:20261025T020000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 TZNAME:CET END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260522T133741Z UID:F96B3995-2FCE-41F7-9AAB-8F0E79A562A7 DTSTART;TZID=Europe/Rome:20260615T103000 DTEND;TZID=Europe/Rome:20260615T123000 DESCRIPTION:The universe cannot yet be fully explained by the theories deve loped so far. In particular\, galaxies move faster than expected and behav e as if they contained far more mass than what is actually visible. Physic ists therefore estimate that ordinary matter — the matter we can directl y observe and interact with — accounts for only about 5% of the universe \, while the remaining 95% consists of dark energy (68%) and dark matter ( 27%).\n\nAmong the strongest candidates for dark matter is the axion\, a h ypothetical particle expected to interact with the electromagnetic field i n the presence of a static magnetic field through the so-called inverse Pr imakoff effect. The observable signal frequency depends linearly on the ax ion mass\; however\, since the axion mass cannot currently be predicted th eoretically\, experiments must search across a broad frequency spectrum\, including the microwave range [1\,2].\n\nWithin this framework\, the MADMA X collaboration [3] is developing a dielectric haloscope\, a detection ins trument designed to achieve improved sensitivity compared with conventiona l cavity-based experiments [1]. The MAgnetized Disc and Mirror Axion eXper iment (MADMAX) employs a wide range of advanced microwave technologies\, p artly inherited from radio astronomy\, partly shared with quantum computin g applications\, and partly developed specifically for axion detection.\n\ nA non-exhaustive list of these technologies includes: cryogenic low-noise amplifiers\, parametric amplifiers\, cryogenic calibration techniques\, f ilters\, waveguide components such as orthomode transducers and overmoded tapers\, feed horns\, ellipsoidal rather than parabolic reflectors\, and r esonators based on large dielectric discs (diameter of at least 20 cm).\n\ nThe seminar focuses on these technologies\, illustrating how they are int egrated to achieve the extremely high sensitivity required for axion dark matter searches\, while also highlighting the multidisciplinary nature of the effort and the different fields contributing toward this common goal.\ n\n[1] J. R. Navarro-Madrid\, J. M. García-Barceló\, and A. Díaz-Morcil lo\, “Microwave technologies in experiments for detection of dark matter axions\,” IEEE Microw Mag\, vol. 26\, no. 3\, pp. 78–87\, 2025\, doi: 10.1109/MMM.2024.3514013.\n\n[2] P. Brun et al.\, “A new experimental a pproach to probe QCD axion dark matter in the mass range above 40 μeV\, ” The European Physical Journal C\, vol. 79\, no. 3\, p. 186\, 2019\, do i: 10.1140/epjc/s10052-019-6683-x.\n\n[3] MADMAX Collaboration et al.\, “First search for axion dark matter with a MADMAX prototype\,” Phys Re v Lett\, vol. 135\, no. 4\, p. 41001\, Jul. 2025\, doi: 10.1103/c749-419q. \n\nSpeaker(s): Giacomo Giannetti\n\nBldg: Aula Caminetto\, Via di Santa M arta 3\, Firenze\, Toscana\, Italy\, 50139\, Virtual: https://events.vtool s.ieee.org/m/560766 LOCATION:Bldg: Aula Caminetto\, Via di Santa Marta 3\, Firenze\, Toscana\, Italy\, 50139\, Virtual: https://events.vtools.ieee.org/m/560766 ORGANIZER:matteo.passeri@unifi.it SEQUENCE:25 SUMMARY:Microwave technologies in axion dark matter search URL;VALUE=URI:https://events.vtools.ieee.org/m/560766 X-ALT-DESC:Description: <br /><p class="cvGsUA direction-ltr align-justify para-style-body"><span class="a_GcMg font-feature-liga-off font-feature-cl ig-off font-feature-calt-off text-decoration-none text-strikethrough-none" >The universe cannot yet be fully explained by the theories developed so f ar. In particular\, galaxies move faster than expected and behave as if th ey contained far more mass than what is actually visible. Physicists there fore estimate that ordinary matter &mdash\; the matter we can directly obs erve and interact with &mdash\; accounts for only about 5% of the universe \, while the remaining 95% consists of dark energy (68%) and dark matter ( 27%).</span></p>\n<p class="cvGsUA direction-ltr align-justify para-style- body"><span class="a_GcMg font-feature-liga-off font-feature-clig-off font -feature-calt-off text-decoration-none text-strikethrough-none">Among the strongest candidates for dark matter is the axion\, a hypothetical particl e expected to interact with the electromagnetic field in the presence of a static magnetic field through the so-called inverse Primakoff effect. The observable signal frequency depends linearly on the axion mass\; however\ , since the axion mass cannot currently be predicted theoretically\, exper iments must search across a broad frequency spectrum\, including the micro wave range [1\,2].</span></p>\n<p class="cvGsUA direction-ltr align-justif y para-style-body"><span class="a_GcMg font-feature-liga-off font-feature- clig-off font-feature-calt-off text-decoration-none text-strikethrough-non e">Within this framework\, the MADMAX collaboration [3] is developing a di electric haloscope\, a detection instrument designed to achieve improved s ensitivity compared with conventional cavity-based experiments [1]. The MA gnetized Disc and Mirror Axion eXperiment (MADMAX) employs a wide range of advanced microwave technologies\, partly inherited from radio astronomy\, partly shared with quantum computing applications\, and partly developed specifically for axion detection.</span></p>\n<p class="cvGsUA direction-l tr align-justify para-style-body"><span class="a_GcMg font-feature-liga-of f font-feature-clig-off font-feature-calt-off text-decoration-none text-st rikethrough-none">A non-exhaustive list of these technologies includes: cr yogenic low-noise amplifiers\, parametric amplifiers\, cryogenic calibrati on techniques\, filters\, waveguide components such as orthomode transduce rs and overmoded tapers\, feed horns\, ellipsoidal rather than parabolic r eflectors\, and resonators based on large dielectric discs (diameter of at least 20 cm).</span></p>\n<p class="cvGsUA direction-ltr align-justify pa ra-style-body"><span class="a_GcMg font-feature-liga-off font-feature-clig -off font-feature-calt-off text-decoration-none text-strikethrough-none">T he seminar focuses on these technologies\, illustrating how they are integ rated to achieve the extremely high sensitivity required for axion dark ma tter searches\, while also highlighting the multidisciplinary nature of th e effort and the different fields contributing toward this common goal.</s pan></p>\n<p class="cvGsUA direction-ltr align-justify para-style-body">&n bsp\;</p>\n<p class="cvGsUA direction-ltr align-justify para-style-body">< span class="a_GcMg font-feature-liga-off font-feature-clig-off font-featur e-calt-off text-decoration-none text-strikethrough-none">[1] J. R. Navarro -Madrid\, J. M. Garc&iacute\;a-Barcel&oacute\;\, and A. D&iacute\;az-Morci llo\, &ldquo\;Microwave technologies in experiments for detection of dark matter axions\,&rdquo\; IEEE Microw Mag\, vol. 26\, no. 3\, pp. 78&ndash\; 87\, 2025\, doi: 10.1109/MMM.2024.3514013.</span></p>\n<p class="cvGsUA di rection-ltr align-justify para-style-body"><span class="a_GcMg font-featur e-liga-off font-feature-clig-off font-feature-calt-off text-decoration-non e text-strikethrough-none">[2] P. Brun et al.\, &ldquo\;A new experimental approach to probe QCD axion dark matter in the mass range above 40 &mu\;e V\,&rdquo\; The European Physical Journal C\, vol. 79\, no. 3\, p. 186\, 2 019\, doi: 10.1140/epjc/s10052-019-6683-x.</span></p>\n<p class="cvGsUA di rection-ltr align-justify para-style-body"><span class="a_GcMg font-featur e-liga-off font-feature-clig-off font-feature-calt-off text-decoration-non e text-strikethrough-none">[3] MADMAX Collaboration et al.\, &ldquo\;First search for axion dark matter with a MADMAX prototype\,&rdquo\; Phys Rev L ett\, vol. 135\, no. 4\, p. 41001\, Jul. 2025\, doi: 10.1103/c749-419q.</s pan></p> END:VEVENT END:VCALENDAR