Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Absolute gravimeter helium immersion experiment
Abstract. Operating an FG-5 absolute gravimeter in a helium atmosphere should reduce the noise that is caused by vibrations of the air–vacuum interface where the interferometer laser beam enters and leaves the vacuum dropping chamber. The helium atmosphere will decrease the change in refractivity across the interface by up to 88% over the value in air, depending on the purity of the helium. A marked reduction in the post-fit residuals is observed at frequencies of about 50 Hz and little or no effect at higher frequencies. A qualitative explanation of the frequency cutoff in terms of motion of air under compression is developed. Further experiments to measure and characterize the effects of the vibrations are planned.
Absolute gravimeter helium immersion experiment
Abstract. Operating an FG-5 absolute gravimeter in a helium atmosphere should reduce the noise that is caused by vibrations of the air–vacuum interface where the interferometer laser beam enters and leaves the vacuum dropping chamber. The helium atmosphere will decrease the change in refractivity across the interface by up to 88% over the value in air, depending on the purity of the helium. A marked reduction in the post-fit residuals is observed at frequencies of about 50 Hz and little or no effect at higher frequencies. A qualitative explanation of the frequency cutoff in terms of motion of air under compression is developed. Further experiments to measure and characterize the effects of the vibrations are planned.
Absolute gravimeter helium immersion experiment
Robertson, D. S. (Autor:in) / Courtier, N. (Autor:in) / Winester, D. (Autor:in)
Journal of Geodesy ; 76
2003
Aufsatz (Zeitschrift)
Englisch
BKL:
38.73
Geodäsie
Calibration of a superconducting gravimeter with an absolute atom gravimeter
| Online Contents | 2021
Uncertainty Analysis of the Digital Fringe Signal Processing in an Absolute Gravimeter
| British Library Conference Proceedings | 1998
Gravimeter : Messprinzipien, Aufbau, Messtechnik
| UB Braunschweig | 1957
Gravimeter : Messprinzipien, Aufbau, Messtechnik
| TIBKAT | 1957