U.S.-China Cooperative Research (Physics): Search for Gravitational Radiation

这是斯坦福大学的Peter F. Michelson和何恩合作项目的延续。中国广州中山大学引力物理研究所的张晓东说。该项目始于1985年，由美国国家科学基金会和中国国家教委共同资助。直接探测重力辐射仍然是重力物理研究的重要目标，也是实验物理中最具挑战性的问题之一。探测重力波不仅对物理学具有根本性的重要性，而且将为研究宇宙打开一扇重要的天文学新窗口。共振。包括斯坦福大学和中山大学在内的一些机构正在开发质量探测器。斯坦福探测器已被用于巧合实验，这些实验设定了迄今为止引力辐射通量的最低上限。在斯坦福大学和中山大学的合作计划下，在过去的五年里进行了一次巧合实验，技术信息很大。尺度低温探测器已经交换，最近，先进的天线材料和低温隔振技术的研究已经进行。在拟议的研究中，研究人员将继续开发改进的探测器技术，主要是在隔振和材料研究领域，进行合作努力，修复和升级斯坦福大学的4k探测器，交换有关其他共同感兴趣的引力物理实验的信息。并尽早进行另一次对引力辐射的巧合搜索。

This is a continuation of a collaborative project between Peter F. Michelson of Stanford University and He En.ke of the Institute of Gravitational Physics of Zhongshan University in Guangzhou, China. This project, which began in 1985, is sponsored by NSF and the Chinese State Education Commission. The direct detection of gravitational radiation is still the most important goal of research in gravitational physics and one of the most challenging problems in experimental physics. The detection of gravity waves would not only be of fundamental importance to physics, but would open up an important new astronomical window on the universe. Resonant.mass detectors have been under development at several institutions including Stanford and Zhongshan universities. The Stanford detector has been utilized in coincidence experiments that have set the lowest upper limits to date on the flux of gravitational radiation. Under the cooperative program between the Stanford and Zhongshan groups during the past five years, a coincidence experiment has been conducted, technical information about large.scale cryogenic detectors has been exchanged, and most recently, investigations of advanced antenna materials and vibration isolation techniques at low temperatures have been conducted. In the proposed study, the investigators will continue to develop improved detector technology, principally in the areas of vibration isolation and materials studies, undertake a collaborative effort to repair and upgrade the 4 K detector at Stanford, exchange information about other gravitational physics experiments in which there is mutual interest, and at the earliest opportunity, carry out another coincidence search for gravitational radiation.