http://scitation.aip.org/ RSI: Gravity; Geophysics; Astronomy and Astrophysics http://link.aip.org/link/?RSI/83/024501/1&agg=rss Jennifer C. Driggers, Matthew Evans, Keenan Pepper, and Rana Adhikari<br/> We demonstrate feed-forward vibration isolation on a suspended Fabry-Perot interferometer using Wiener filtering and a variant of the common least mean square adaptive filter algorithm. We compare the experimental results with theoretical estimates of the cancellation efficiency. Using data from the ... [Rev. Sci. Instrum. 83, 024501 (2012)] published Thu Feb 2, 2012. http://link.aip.org/link/?RSI/83/014501/1&agg=rss P. C. Burnley and I. C. Getting<br/> An internal heater capable of 1400 K has been developed for use with a gas piston cylinder apparatus capable of achieving in excess of 3 GPa with an argon pressure medium. The heated gas piston cylinder produces a truly hydrostatic environment for samples up to 3 mm in diameter and 8 mm in length. T ... [Rev. Sci. Instrum. 83, 014501 (2012)] published Tue Jan 31, 2012. http://link.aip.org/link/?RSI/82/124501/1&agg=rss J. Sanjuan, A. Preston, D. Korytov, A. Spector, A. Freise et al.<br/> The laser interferometer space antenna (LISA) is a mission designed to detect low frequency gravitational waves. In order for LISA to succeed in its goal of direct measurement of gravitational waves, many subsystems must work together to measure the distance between proof masses on adjacent spacecra ... [Rev. Sci. Instrum. 82, 124501 (2011)] published Fri Dec 9, 2011. http://link.aip.org/link/?RSI/82/094502/1&agg=rss T. Accadia, F. Acernese, P. Astone, G. Ballardin, F. Barone et al.<br/> We report an application of Kalman filtering to the inverted pendulum (IP) of the Virgo gravitational wave interferometer. Using subspace method system identification techniques, we calculated a linear mechanical model of Virgo IP from experimental transfer functions. We then developed a Kalman filt ... [Rev. Sci. Instrum. 82, 094502 (2011)] published Mon Sep 26, 2011. http://link.aip.org/link/?RSI/82/094501/1&agg=rss M. V. Moody<br/> A gravity gradiometer designed for operation on an aircraft or ship has been tested in the laboratory. A noise level of 0.53 E (E [equivalent] 10 s) rms over a 0.001 to 1 Hz bandwidth has been measured, and the primary error mechanisms have been analyzed and quantified. The design is a continuation ... [Rev. Sci. Instrum. 82, 094501 (2011)] published Fri Sep 9, 2011. http://link.aip.org/link/?RSI/82/074503/1&agg=rss Ove Havnes, Thomas W. Hartquist, Meseret Kassa, and Gregor E. Morfill<br/> Many effects and factors can influence the efficiency of a rocket plasma probe. These include payload charging, solar illumination, rocket payload orientation and rotation, and dust impact induced secondary charge production. As a consequence, considerable uncertainties can arise in the determinatio ... [Rev. Sci. Instrum. 82, 074503 (2011)] published Wed Jul 27, 2011. http://link.aip.org/link/?RSI/82/074502/1&agg=rss S. Buchman and J. P. Turneaure<br/> Gravity probe B (GP-B) was designed to measure the geodetic and frame dragging precessions of gyroscopes in the near field of the Earth using a drag-free satellite in a 642 km polar orbit. Four electrostatically suspended cryogenic gyroscopes were designed to measure the precession of the local iner ... [Rev. Sci. Instrum. 82, 074502 (2011)] published Thu Jul 21, 2011. http://link.aip.org/link/?RSI/82/074501/1&agg=rss M. Shimoyama, K.-I. Oyama, T. Abe, and A. W. Yau<br/> It is commonly believed that an energy transfer from thermal to suprathermal electrons (<several eV) greatly affects the energy budget of the ionosphere. However, observation of electron energy spectrum in this energy range is quite limited because of technical difficulties of measurement. We have d ... [Rev. Sci. Instrum. 82, 074501 (2011)] published Mon Jul 11, 2011. http://link.aip.org/link/?RSI/82/064502/1&agg=rss William F. Grainger, Chris E. North, and Peter. A. R. Ade<br/> We investigate the possibility of using a flat-fold beam steering mirror for a cosmic microwave background B-mode experiment. An aluminium flat-fold mirror is found to add ~0.075% polarization, which varies in a scan synchronous way. Time-domain simulations of a realistic scanning pattern are perfor ... [Rev. Sci. Instrum. 82, 064502 (2011)] published Wed Jun 29, 2011. http://link.aip.org/link/?RSI/82/064501/1&agg=rss Ian Jackson, Heather Schijns, Douglas R. Schmitt, Junjie Mu, and Alison Delmenico<br/> Novel laboratory equipment has been modified to allow both torsional and flexural oscillation measurements at sub-microstrain amplitudes, thereby providing seismic-frequency constraints on both the shear and compressional wave properties of cylindrical rock specimens within the linear regime. The ne ... [Rev. Sci. Instrum. 82, 064501 (2011)] published Mon Jun 6, 2011. http://link.aip.org/link/?RSI/82/054501/1&agg=rss M. Hasegawa, O. Tajima, Y. Chinone, M. Hazumi, K. Ishidoshiro et al.<br/> We present a novel system to calibrate millimeter-wave polarimeters for cosmic microwave background (CMB) polarization measurements. This technique is an extension of the conventional metal mirror rotation approach, however, it employs cryogenically-cooled blackbody absorbers. The primary advantage ... [Rev. Sci. Instrum. 82, 054501 (2011)] published Fri May 20, 2011. http://link.aip.org/link/?RSI/82/044502/1&agg=rss A. Cumming, R. Jones, M. Barton, G. Cagnoli, C. A. Cantley et al.<br/> Detection of gravitational waves from astrophysical sources remains one of the most challenging problems faced by experimental physicists. A significant limit to the sensitivity of future long-baseline interferometric gravitational wave detectors is thermal displacement noise of the test mass mirror ... [Rev. Sci. Instrum. 82, 044502 (2011)] published Thu Apr 21, 2011. http://link.aip.org/link/?RSI/82/024501/1&agg=rss C. J. Rawn, J. R. Leeman, S. M. Ulrich, J. E. Alford, T. J. Phelps et al.<br/> A fiber optic-based distributed sensing system (DSS) has been integrated with a large volume (72 l) pressure vessel providing high spatial resolution, time-resolved, 3D measurement of hybrid temperaturestrain (TS) values within experimental sedimentgas hydrate systems. Areas of gas hydrate formation ... [Rev. Sci. Instrum. 82, 024501 (2011)] published Tue Feb 8, 2011. http://link.aip.org/link/?RSI/82/014501/1&agg=rss Zhigang Wang, Yonggang Liu, Wei Song, Yan Bi, and Hongsen Xie<br/> A broadband spectroscopy method is proposed to measure the ultrasonic wave phase velocity of Z-cut quartz under high pressure up to 4.7 GPa. The sample is in a hydrostatic circumstance under high pressure, and we can get longitudinal wave and shear wave signals simultaneously in our work. By fast Fo ... [Rev. Sci. Instrum. 82, 014501 (2011)] published Thu Jan 20, 2011. http://link.aip.org/link/?RSI/81/124501/1&agg=rss K. L. Aplin and R. G. Harrison<br/> Two vertical cosmic ray telescopes for atmospheric cosmic ray ionization event detection are compared. Counter A, designed for low power remote use, was deployed in the Welsh mountains; its event rate increased with altitude as expected from atmospheric cosmic ray absorption. Independently, Counter ... [Rev. Sci. Instrum. 81, 124501 (2010)] published Mon Dec 20, 2010. http://link.aip.org/link/?RSI/81/114501/1&agg=rss B. M. Randol, R. W. Ebert, F. Allegrini, D. J. McComas, and N. A. Schwadron<br/> Electrostatic analyzers (ESAs), in various forms, are used to measure plasma in a range of applications. In this article, we describe how ions reflect from the interior surfaces of an ESA, the detection of which constitutes a fundamentally nonideal response of ESAs. We demonstrate this effect by com ... [Rev. Sci. Instrum. 81, 114501 (2010)] published Fri Nov 12, 2010. http://link.aip.org/link/?RSI/81/084501/1&agg=rss Johana Brokesova and Jiri Malek<br/> A new mechanical sensor system for recording the rotation of ground velocity has been constructed. It is based on measurements of differential motions between paired sensors mounted along the perimeter of a rigid (undeformable) disk. The elementary sensors creating the pairs are sensitive low-freque ... [Rev. Sci. Instrum. 81, 084501 (2010)] published Thu Aug 19, 2010. http://link.aip.org/link/?RSI/81/034501/1&agg=rss D. James, V. Hoxie, and M. Horanyi<br/> Polyvinylidene fluoride (PVDF) dust detectors have flown on many space missions since their first use on the Vega 1 and 2 spacecraft. The fundamental operating principle of these detectors is the production of a charge upon impact by a hypervelocity dust particle. This measured signal, N, depends on ... [Rev. Sci. Instrum. 81, 034501 (2010)] published Mon Mar 29, 2010. http://link.aip.org/link/?RSI/80/124501/1&agg=rss S. B. Mende, W. Rachelson, R. Sterling, H. U. Frey, S. E. Harris et al.<br/> Coupling of the solar wind to the Earth magnetosphere/ionosphere is primarily through the high latitude regions, and there are distinct advantages in making remote sensing observations of these regions with a network of ground-based observatories over other techniques. The Antarctic continent is ide ... [Rev. Sci. Instrum. 80, 124501 (2009)] published Thu Dec 17, 2009. http://link.aip.org/link/?RSI/80/114502/1&agg=rss Jean-Charles Dumas, Pablo Barriga, Chunnong Zhao, Li Ju, and David G. Blair<br/> High performance vibration isolators are required for ground based gravitational wave detectors. To attain very high performance at low frequencies we have developed multistage isolators for the proposed Australian International Gravitational Observatory detector in Australia. New concepts in vibrat ... [Rev. Sci. Instrum. 80, 114502 (2009)] published Wed Nov 11, 2009. http://link.aip.org/link/?RSI/80/114501/1&agg=rss P. Barriga, J. C. Dumas, A. A. Woolley, C. Zhao, and D. G. Blair<br/> This paper describes the first demonstration of vibration isolation and suspension systems, which have been developed with view to application in the proposed Australian International Gravitational Observatory. In order to achieve optimal performance at low frequencies new components and techniques ... [Rev. Sci. Instrum. 80, 114501 (2009)] published Wed Nov 11, 2009.