A cryogenic torsion pendulum: progress report

被引：8

作者：

Bantel, MK ^{[1
]}

Newman, RD ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

CLASSICAL AND QUANTUM GRAVITY | 2000年 / 17卷 / 12期

关键词：

D O I：

10.1088/0264-9381/17/12/302

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A cryogenic torsion pendulum for gravitational experiments is being refined at its remote operation site near Richland, Washington. Features of the apparatus include: four stages of temperature control, an angular readout of the pendulum about three orthogonal axes and a remote operation capability. Currently, we are testing the apparatus with a nominally symmetric pendulum suspended from a 25 mu m diameter Al5056 fibre. Since installing the apparatus in June 1999, we have been tearing and fine tuning the instruments and software. Most recently (December 1999) magnetic shielding was added, reducing the eddy current damping of the pendulum by similar to 10(3). Magnetic contamination of the rest pendulum, with a net magnetic dipole moment of similar to 6 x 10(-9) N m T-1, served in measuring the effectiveness of the shielding.

引用

页码：2313 / 2318

页数：6