High-Acoustic Sensitivity Radiopure Piezoelectric Materials for Dark Matter Detection
High-Acoustic Sensitivity Radiopure Piezoelectric Materials for Dark Matter Detection
复制标题
用于暗物质探测的高声灵敏度放射性纯压电材料
DOI：
10.1021/acsaelm.3c01116
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发表时间：
2023
影响因子：
4.7
通讯作者：
Nanda, Aman
中科院分区：
文献类型：
--
作者：
Kang, Min Gyu;Yan, Yongke;Maurya, Deepam;Song, Hyun-Cheol;Yang, Lijuan;Levine, Ilan;Behnke, Edward;Borsodi, Haley;Fustin, Drew;Nanda, Aman
压电材料被用来制造气泡室的声学换能器，以寻找暗物质粒子。已经证明，由核反冲引发的气泡发出的声辐射与阿尔法衰变─引起的相变不同，α衰变是此类搜索中的主要背景噪声。然而，这些压电材料必须表现出超低的放射性，以最大限度地减少暗物质探测的中子本底，同时具有高的声学灵敏度。在这里，我们第一次展示了符合声传感标准的放射性纯高性能压电陶瓷。对放射性前驱体进行筛选，以确定238U、232Th和210Pb含量较低的前驱体。利用放射性前驱体合成了不同组成的压电陶瓷，并对其机电声传感性能进行了评价。采用掺杂、织构等多种合成方法对陶瓷的压电系数进行了调整，研究了压电系数与陶瓷声敏性能的关系。用织构的PbN-PbTiO_3(PMN-PT)陶瓷制作的声学换能器具有较高的压电系数(D33×G33)，具有较高的声学灵敏度。这项研究证明了一个有用的品质因数(FOM)用于气泡室中的声学传感。
Piezoelectric materials are used to fabricate acoustic transducers for bubble chambers in search for particles of dark matter. It has been shown that bubbles initiated by nuclear recoils emit acoustic radiation distinguishable from the phase transitions caused by alpha-decay─the main background noise in such searches. However, these piezoelectric materials must exhibit ultralow radioactivity to minimize the neutron background for dark matter detection while possessing high acoustic sensitivity. Here, for the first time, we demonstrate radiopure high-performance piezoelectric ceramics meeting the criteria for acoustic sensing. The screening of radiopure precursors is performed to identify those with low238U,232Th, and210Pb contents. Using the radiopure precursors, piezoelectric ceramics with varying compositions are synthesized, and their electromechanical acoustic sensing performance is evaluated. Multiple synthesis modifications such as doping and texturing are utilized to tailor the piezoelectric coefficients of the piezoelectric ceramics, and the relationship between the piezoelectric coefficients and acoustic sensing performance of the ceramics is investigated. Acoustic transducers fabricated using textured Pb(Mg1/3Nb2/3)O3–PbTiO3(PMN–PT) ceramics are found to exhibit superior acoustic sensitivity due to their high piezoelectric transduction coefficient (d33×g33). This study demonstrates a useful figure of merit (FOM) for acoustic sensing in bubble chambers.
浅谈气泡室的理论
影响因子：
4.6
作者：
F. Seitz
通讯作者：
F. Seitz
气泡室中自旋相关的 WIMP 限制
影响因子：
56.9
作者：
E. Behnke;J. Collar;P. Cooper;K. Crum;M. Crisler;M. Hu;I. Levine;D. Nakazawa;H. Nguyen;B. Odom;E. Ramberg;J. Rasmussen;N. Riley;A. Sonnenschein;M. Szydagis;R. Tschirhart
通讯作者：
R. Tschirhart