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Sound speeds of pure fluid water are reported between 0.1 and 700 MPa, from 353 K down to the melting curves of the ice phases. The 2 sigma precision and accuracy of the new sound speed measurements are close to 0.02%, with an estimated…

Chemical Physics · Physics 2019-03-29 Olivier Bollengier , J. Michael Brown , George H. Shaw

The AMADEUS system is integrated in the ANTARES neutrino telescope in the Mediterranean Sea and aims for the investigation of acoustic particle detection techniques in the deep sea. Installed at a depth of more than 2000m, the acoustic…

Instrumentation and Methods for Astrophysics · Physics 2019-08-13 Robert Lahmann

Snow poles are inexpensive systems composed of a wooden mast with temperature sensors affixed at varying heights with the purpose of estimating the snow depth. They are frequently utilised in cold, remote regions where the maintenance of…

Atmospheric and Oceanic Physics · Physics 2024-04-03 Diego García-Maroto , Luis Durán , Miguel Ángel de Pablo Hernández

We analyze observations of the microwave sky made with the Python experiment in its fifth year of operation at the Amundsen-Scott South Pole Station in Antarctica. After modeling the noise and constructing a map, we extract the cosmic…

Astrophysics · Physics 2009-11-07 K. Coble , S. Dodelson , M. Dragovan , K. Ganga , L. Knox , J. Kovac , B. Ratra , T. Souradeep

Observations of the microwave sky using the Python telescope in its fifth season of operation at the Amundsen-Scott South Pole Station in Antarctica are presented. The system consists of a 0.75 m off-axis telescope instrumented with a HEMT…

Astrophysics · Physics 2007-05-23 Kimberly Ann Coble

During the past decade, a year-round observatory has been established at the geographic South Pole by the Center for Astrophysical Research in Antarctica (CARA). CARA has fielded several millimeter- and submillimeter-wave instruments:…

Astrophysics · Physics 2010-12-13 Antony A. Stark

Observations of the microwave sky using the Python telescope in its fifth season of operation at the Amundsen-Scott South Pole Station in Antarctica are presented. The system consists of a 0.75 m off-axis telescope instrumented with a HEMT…

The surface acoustic wave (SAWs) attenuation coefficient $\Gamma$ and the velocity change $\Delta V /V$ were measured for $p$-type Si/SiGe heterostructures in the temperature range 0.7 - 1.6 K as a function of external magnetic field $H$ up…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 G. O. Andrianov , I. L. Drichko , A. M. Diakonov , I. Yu. Smirnov , O. A. Mironov , M. Myronov , T. E. Whall , D. R. Leadley

A drastic variation (~47%) in thermal conductivity (\k{appa}) for synthesized samples (TiCoSb1+x, x=0.0, 0.01, 0.02, 0.03, 0.04, and 0.06) is observed. The lowest \k{appa} is reported for the TiCoSb1.02 sample. Thermal variation of \k{appa}…

Wave attenuation by ice floes is an important parameter for modelling the Arctic Oceans. At present, attenuation coefficients are extracted from linear models as a function of the incident wave period and floe thickness. Recent explorations…

The absorption of surface acoustic waves (SAW's) by an array of quantum dots in which the mean level spacing Delta is larger than the sound frequency omega, the temperature T, and the phase breaking rate tau^{-1}_phi is considered. The…

Mesoscale and Nanoscale Physics · Physics 2009-10-30 Andreas Knaebchen , Ora Entin-Wohlman , Yuri Galperin , Yehoshua Levinson

We present an internal consistency test of South Pole Telescope (SPT) measurements of the cosmic microwave background (CMB) temperature anisotropy using three-band data from the SPT-SZ survey. These measurements are made from observations…

Results of the measurements of sound speed and attenuation in a bubbly medium are reported. Monodisperse bubble solutions are sonicated with broadband ultrasound pulses with pressure amplitudes ranging between 12.5-100 kPa. Fundamental…

Fluid Dynamics · Physics 2018-11-20 A. J. Sojahrood , Q. Li , H. Haghi , R. Karshafian , T. M. Porter , M. C. Kolios

We compute the thermal conductivity and sound attenuation length of a dilute atomic Fermi gas in the framework of kinetic theory. Above the critical temperature for superfluidity, T_c, the quasi-particles are fermions, whereas below T_c,…

Quantum Gases · Physics 2015-03-13 Matt Braby , Jingyi Chao , Thomas Schaefer

IceCube is currently not only the largest neutrino telescope but also one of the world's most competitive instruments for studying cosmic rays in the PeV to EeV regime where the transition from galactic to extra-galactic sources should…

Instrumentation and Methods for Astrophysics · Physics 2019-08-21 Sebastian Böser

At the AMANDA South Pole site, four new holes were drilled to depths 2050 m to 2180 m and instrumented with 86 photomultipliers (PMTs) at depths 1520-2000 m. Of these PMTs 79 are working, with 4-ns timing resolution and noise rates 300 to…

Astrophysics · Physics 2007-05-23 L. Bergstrom

During the On-Station Thermal Test campaign of the LISA Pathfinder the data and diagnostics subsystem was tested in nearly space conditions for the first time after integration in the satellite. The results showed the compliance of the…

The temperature dependence of the thermal conductivity of amorphous solids is markedly different from that of their crystalline counterparts, but exhibits universal behaviour. Sound attenuation is believed to be related to this universal…

Soft Condensed Matter · Physics 2020-04-03 Lijin Wang , Elijah Flenner , Grzegorz Szamel

The coherent acoustic waves can be created by InGaN double quantum wells. We measured the signals information of the coherent acoustic waves at the interface of GaN/glycerol to obtain the attenuations of glycerol at 295 K and 120 K by the…

Applied Physics · Physics 2021-02-18 Fan Jun Wei , Kung-Hsuan Lin