Tests of Newtonian Gravitation and the Equivalence Principle and Cryogenic Torsion Pendulum Development

牛顿万有引力和等效原理的试验及低温扭摆的研制

• 批准号: 0108937
• 负责人: Riley Newman
• 金额: $ 74.23万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0108937&HistoricalAwards=false
• 关键词: Tests; Newtonian; Gravitation; Equivalence; Principle

A program of laboratory experiments in gravitation is to be continued and expanded, in parallel with continued development of the cryogenic torsion pendulum as a general tool for research in gravitational physics. Much of this work will be done in collaboration with the gravitational physics group of Professor Paul Boynton at the University of Washington. Research to be conducted includes:Completion in the first year of a precision measurement of the gravitational constant G, withtarget accuracy of 15 ppm.Jointly with Professor Boynton's group, a test of the inverse square distance dependence of the gravitational force for mass separation on the order of 15 centimeters.Jointly with Boynton's group, tests of the equivalence principle over various distance ranges,for gravitational field sources which include laboratory masses, a nearby mountain, and thesun.These projects will be conducted in an underground laboratory that has been prepared with support from the Pacific Northwest National Laboratory in a former Nike missile bunker on an isolated environmental preserve nearRichland, Washington. In conjunction with these projects, the performance of the cryogenic torsionpendulum will be progressively improved through development and refinement of seismic isolation, tilt control, temperature control, and fiber choice and preparation techniques. The cryogenic torsion pendulum being developed is of potential value to any research in gravitation or other fields which requires the measurement of extremely small slowly varying forces.This project provides research experience and training in a variety of widely applicable technologies, to undergraduate and graduate students as well as to a postdoctoral researcher.

将继续进行和扩展实验室实验的实验计划，并与持续发展的低温扭转摆ul依，作为重力物理学研究的一般工具。 这项工作的大部分将与华盛顿大学的Paul Boynton教授的重力物理小组合作完成。 要进行的研究包括：在精确测量重力常数g的第一年完成，与博因顿教授组的准确性为15 ppm。群众，附近的山和thesun。这些项目将在一个地下实验室中进行，该项目已在太平洋西北国家实验室的支持下，在一家前耐克导弹掩体的支持下，在华盛顿州里奇兰附近的一个孤立的环境保护区上进行。 结合这些项目，通过开发和完善地震隔离，倾斜控制，温度控制以及纤维选择和制备技术，将逐渐改善低温扭转的性能。 开发的低温扭转摆构对任何重力或其他领域的研究都具有潜在的价值，该研究需要测量极小的缓慢变化的力量。该项目提供了各种广泛适用技术的研究经验和培训，以使本科和研究生以及博士后研究员提供。