Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Gary G. Ihas"'
Publikováno v:
Journal of Low Temperature Physics. 171:497-503
Metastable helium molecules have been shown to be ideal tracers for the study of normal-fluid flow in superfluid 4He above 1 K. These molecules can be visualized using a laser-induced-fluorescence technique. In order to extract quantitative informati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0fbc3625c598dc47b5aa0da87cf62f39
https://doi.org/10.1007/s10909-012-0708-2
https://doi.org/10.1007/s10909-012-0708-2
Publikováno v:
Journal of Low Temperature Physics. 150:384-393
A grid has been pulled through a column of liquid helium at speeds as high as 1 m/s and at temperatures as low as 90 mK. A 300 micrometer Ge thermometer with response time of less than 1 ms measured the temperature rise resulting from the decay of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9a177686effe9a57ef10ed41ebaf1c4
https://doi.org/10.1007/s10909-007-9566-8
https://doi.org/10.1007/s10909-007-9566-8
Publikováno v:
Journal of Low Temperature Physics. 148:281-285
To produce turbulence in a pure quantum liquid, a superconducting linear motor has been built to tow a grid through a channel of superfluid helium at 20 mK. The design was developed using a computer simulation which considered the critical aspects of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72bab677e2b59ec6ce81717243b7902f
https://doi.org/10.1007/s10909-007-9381-2
https://doi.org/10.1007/s10909-007-9381-2
Autor:
Joseph Niemela, Gary G. Ihas
Publikováno v:
Journal of Low Temperature Physics. 146:499-510
The development of a small-gap capacitor, especially utilizable for studying finite-size effects near the 4He superfluid phase transition, is discussed. This device is designed to provide a range of known sample heights of small measure, commensurate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::442167f61b5c901f32cc7f10db3f8cd2
https://doi.org/10.1007/s10909-006-9280-y
https://doi.org/10.1007/s10909-006-9280-y
Publikováno v:
Journal of Low Temperature Physics. 145:165-185
The purpose of ongoing low-temperature quantum turbulence research is to produce turbulence similar to that studied in classical fluids to compare the experimental data and theories. Specifically, in the absence of viscosity, through what path does t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cea0c865a2cdc8592999bc174b346a0d
https://doi.org/10.1007/s10909-006-9243-3
https://doi.org/10.1007/s10909-006-9243-3
Autor:
Matthew Holmes, Gary G. Ihas, P. C. Hendry, Peter V. E. McClintock, Ladislav Skrbek, D. Charalambous
Publikováno v:
Journal of Low Temperature Physics. 145:107-124
Experimental approaches to the study of quantum turbulence (QT) in superfluid 4He in the low temperature limit, where the normal fluid density is effectively zero, are considered. A succinct general introduction covers liquid 4He, superfluidity, crit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a4a5b13b5c99cb278a3188499392d58
https://doi.org/10.1007/s10909-006-9231-7
https://doi.org/10.1007/s10909-006-9231-7
Autor:
John T. Graham, Gary G. Ihas
Publikováno v:
Journal of Low Temperature Physics. 138:923-928
Matrix isolation of atoms and molecules for energy studies is very popular. In such work, an atom, molecule, adduct, or cluster is isolated in a solid “gas” matrix, which tends to act as a rigid vacuum. For example, a single atom may be frozen in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29ba4fcdf1f32d6f36a9644dea71b8e6
https://doi.org/10.1007/s10909-005-2326-8
https://doi.org/10.1007/s10909-005-2326-8
Publikováno v:
Journal of Low Temperature Physics. 134:401-406
With the large volume uses of liquid hydrogen expected in the near future, specifically for the propulsion of space vehicles and other energy requirements, there is a need to monitor and accurately control the ortho/para ratio in gaseous samples of h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f7b2374a01ffb29f330fcfb5f1ab530
https://doi.org/10.1023/b:jolt.0000012586.44305.a7
https://doi.org/10.1023/b:jolt.0000012586.44305.a7
Publikováno v:
Journal of Low Temperature Physics. 134:437-442
The most efficient shuttle would be an all-cryogenic propellant vehicle. One problem with on-board cryogenic storage is mass gauging. Even though, in principle, one can determine the amount of cryogen in a tank by its history of use, this is not prac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69db9288726d5221b189b8180ed2a4da
https://doi.org/10.1023/b:jolt.0000012592.73769.ba
https://doi.org/10.1023/b:jolt.0000012592.73769.ba
Publikováno v:
Journal of Low Temperature Physics. 134:775-780
Measurements of the nuclear spin-lattice relaxation times (T 1 ) and the nuclear spin-spin relaxation times (T 2 ) are reported for suspensions of small grains of solid hydrogen in liquid helium. The measurements have been carried out for temperature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10bf2f603fa44d2e172e4019aa6f6120
https://doi.org/10.1023/b:jolt.0000012643.89673.a7
https://doi.org/10.1023/b:jolt.0000012643.89673.a7