6163银河线路检测中心学术论坛（第五十六讲）

Bulk-acoustic-wave resonators for sensing high-frequency gravitational waves

通过体声波谐振器探寻高频引力波

The direct observation of gravitational waves by the LIGO and Virgo experiments marked the beginning of a new era of astrophysical investigation. Current and future interferometers, on the ground or in space, will mark a significant step forward, consolidating the knowledge of massive and supermassive GW sources emitting at low frequencies (<10 kHz). The high-frequency region is an uncertain but potentially fertile ground for searching gravitational waves from non-conventional sources, which is motivating the development of new experimental approaches (N. Aggarwal et al, 2025). In their simplest form, bulk acoustic wave (BAW) devices consist of a piezoelectric crystal between two electrodes that transduce the material's vibrations into electrical signals. They are adopted in frequency control and metrology, with well-established standards at frequencies of 5 MHz and above. The use of bulk acoustic wave (BAW) devices as a resonant-mass strain antenna for high-frequency gravitational waves has been recently proposed (Goryachev and Tobar, 2014) and explored with a pioneering experiment at the University of Western Australia. In this seminar, we describe the work to set up a second antenna at the University of Milano Bicocca and the optimization towards an array of custom devices to improve sensitivity in an unexplored region, probe multiple frequencies, and target specific sources, including emission for various dark matter candidates or post-merger emission from neutron stars.

报告人简介：

Tommaso Tabarelli de Fatis是意大利米兰比可卡大学实验物理学教授，并担任意大利国家核物理研究所（INFN）米兰比可卡分部主任。他的科研领域涵盖对撞机上的粒子物理研究、laboratory-scale实验以及物理基本相互作用探测器的研发。他深度参与了欧洲核子研究中心（CERN）大型正负电子对撞机（LEP）和大型强子对撞机（LHC）相关实验装置的设计、运行和数据分析工作，并致力于中微子质量与电荷共轭特性的实验研究。在LHC的 Phase-I运行阶段，他负责CMS实验电磁量能器项目，最终成功观测希格斯玻色子；近期牵头主导新型时间探测器的设计与建造，为CMS实验升级以应对LHC高亮度运行阶段提供关键技术支撑。

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6163银河线路检测中心学术论坛创办于2020年9月，邀请国内外高校和研究机构高层次科技创新领军学者就物理学及相关领域的基础前沿探索、关键技术突破和热点问题等做学术演讲，旨在推进高质量学术交流，促进学科交叉融合和开拓新兴特色方向研究，培养具有科学精神、全球视野、创新能力、批判性思维的优秀青年人才。

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