This is a description of the overall structure of an absolute ballistic gravimeter in which a test object moves freely in a vacuum in the gravitational field. This system is intended for determining the acceleration of gravity using measurements of length and time intervals in the equation of motion of the test object. These intervals are measured by a laser displacement interferometer and a system for precise measurement of time intervals, which are incorporated in the gravimeter. Uncertainties in the measured acceleration of gravity and metrological support of absolute ballistic gravimeters for length and time measurements are discussed.
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References
G. Boedecker, “World gravity standards – present status and future challenges,” Metrologia, 39, No. 5, 429–433 (2002).
W. Torge, “The changing role of gravity reference networks,” IAG Symposia, 119, 1–10 (1998).
S. Merlet et al., “Microgravity investigations for the LNE watt balance project,” Metrologia, 45, No. 3, 265–274 (2008).
M. J. T. Mills and T. J. Quinn, “Primary methods for the measurement of amount of substance,” Metrologia, 38, No. 4, 288–296 (2001).
International Vocabulary of Metrology – Basic and General Concepts and Associated Terms (VIM), JCGM (2008).
L. Vitushkin, “Measurement standards in gravimetry,” in: Terrestrial Gravimetry. Static and Mobile Measurements TGSMM-2007: Proc. Int. Symp., Russian State Research Center Elektropribor, St. Petersburg, Russia (2008), pp. 98–105.
T. M. Niebauer et al., “A new generation of absolute gravimeters,” Metrologia, 32, No. 3, 159–180 (1995).
R. G. Hipkin, “Absolute determination of the vertical gradient of gravity,” Metrologia, 36, No. 1, 47–52 (1999).
A. Germak, S. Desogus, and C. Origlia, “Interferometer for the IMGC rise-and-fall absolute gravimeter,” Metrologia, 39, No. 5, 471–475 (2002).
P. G. Nelson, “An active vibroisolation system for inertial reference and precision measurement,” Rev. Sci. Instrum., 45, No. 5, 2069–2075.
E. L. Canuteson and M. A. Zumberge, “Fiber-optic extrinsic Fabry–Perot vibration isolated interferometer for use in absolute gravity meters,” Appl. Opt., 35, No. 19, 3500–3505 (1996).
Yu. F. Stus, E. N. Kalish, and M. G. Smirnov, “The new measuring-computing system for a laser ballistic gravimeter,” in: Terrestrial Gravimetry. Static and Mobile Measurements, TGSMM-2007: Proc. Int Symp., Russian State Research Center Elektropribor, St. Petersburg, Russia (2008), pp. 106–111.
L. Vitushkin, O. Orlov, and V. Nalivaev, “Test measurements of free-fall acceleration using the FG5-108 gravimeter with a compact diode-pumped solid-state Nd:YVO4/KTP/I2 laser at a wavelength of 532 nm,” ibid., pp. 143–146.
A. L. Vitouchkine and J. E. Faller, “Measurement results with a small cam-driven absolute gravimeter,” Metrologia, 39, No. 5, 465–469 (2002).
L. Vitushkin et al., The 7th Int. Comparison of Absolute Gravimeters ICAG-2005 at the BIPM. Organization and Preliminary Results: Proc. 1st Int. Symp., Int. Gravity Field Service “Gravity Field of the Earth,” Istanbul, Turkey, General Command of Mapping Special Issue 18 (2007), pp. 382–387.
Ch. Rothleitner et al., “Development of new free-fall absolute gravimeter,” Metrologia, 46, No. 3, 283–297 (2009).
S. Merlet et al., “Operating an atom interferometer beyond its linear range,” Metrologia, 46, No. 1, 87–94 (2009).
L. Vitushkin et al., “Investigation of the influence of the short-time interval frequency instability on the measurement of free-fall acceleration using an absolute gravimeter,” Director’s Report on the Activity and Management BIPM, July 1, 2004 – June 30, 2005 (2005), Vol. 6, pp. 196–197.
N. Bobroff, “Recent advances in displacement measuring interferometry,” Measur. Sci. Technol., 4, No. 9, 907–926 (1993).
Mutual Recognition of National Measurement Standards and of Calibration and Measurement Certificates Issued by National Metrology Institutes, Int. Comm. on Weights and Measures, BIPM, France (1999).
I. Murata, “A transportable apparatus for absolute measurement of gravity,” Bull. Earthquake Res. Inst., 53, 49–130 (1978).
H. Hu et al., “Improvements of the MPG-2 transportable absolute ballistic gravimeter,” Metrologia, 47, No. 5, 575–582 (2010).
C. Rothleitner et al., “A method for adjusting the centre of mass of a freely falling body in absolute gravimetry,” Metrologia, 44, No. 3, 234–241 (2007).
V. V. Lyubimov, V. L. Shur, and I. Sh. Etsin, “Diffraction phenomena in a two-beam laser interferometer,” Opt. Spektrosk., 45, No. 2, 204–207 (1978).
G. Mana, “Diffraction effects in optical interferometers illuminated by laser sources,” Metrologia, 26, No. 2, 87–93 (1989).
V. P. Koronkevich, V. S. Sobolev, and Yu. N. Dubnishchev, Laser Interferometry [in Russian], Nauka, Moscow (1983), Ch. 2.
D. van Westrum and T. M. Niebauer, “The diffraction correction for absolute gravimeters,” Metrologia, 40, No. 5, 258–263 (2003).
L. Robertsson, “On the diffraction correction in absolute gravimetry,” Metrologia, 44, No. 1, 35–39 (2007).
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Translated from Izmeritel’naya Tekhnika, No. 3, pp. 3–8, March, 2012.
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Vitushkin, L.F., Orlov, O.A., Germak, A. et al. Laser displacement interferometers with subnanometer resolution in absolute ballistic gravimeters. Meas Tech 55, 221–228 (2012). https://doi.org/10.1007/s11018-012-9944-8
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DOI: https://doi.org/10.1007/s11018-012-9944-8