| Автор | A L Vitouchkine |
| Автор | J E Faller |
| Дата выпуска | 2002-10-01 |
| dc.description | We describe the design of and first results from a cam-driven portable absolute gravimeter. The cambased design of a dropper allows us to build a compact system that uses 20 mm of free fall for the measurement. The instrument drops a test mass 200 times a minute (a measurement rate of more than 3 times per second). The centre of mass of the apparatus is kept fixed during the entire measurement cycle, thus avoiding ``recoil'' effects that could systematically bias the measurement. Seismic isolation is provided by a passive eddy-current-damped simple spring. Measurement results taken at Table Mountain Gravity Observatory (TMGO, Boulder, Colorado), though reproducible at a level of several microgals (1 µGal = 10<sup>-8</sup> m/s<sup>2</sup>), show a sensitivity to the measurement start and stop points at the 20 µGal level. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Measurement results with a small cam-driven absolute gravimeter |
| Тип | paper |
| DOI | 10.1088/0026-1394/39/5/6 |
| Electronic ISSN | 1681-7575 |
| Print ISSN | 0026-1394 |
| Журнал | Metrologia |
| Том | 39 |
| Первая страница | 465 |
| Последняя страница | 469 |
| Аффилиация | A L Vitouchkine; Joint Institute for Laboratory Astrophysics (JILA), National Institute of Standards and Technology and University of Colorado, Boulder, CO 80309-0440, USA |
| Аффилиация | J E Faller; Joint Institute for Laboratory Astrophysics (JILA), National Institute of Standards and Technology and University of Colorado, Boulder, CO 80309-0440, USA |
| Выпуск | 5 |
