Zobrazeno 1 - 10
of 416
pro vyhledávání: '"Godfrin, H"'
Publikováno v:
Phys. Rev. B 103, 104516 (2021)
The dispersion relation $\epsilon(k)$ of the elementary excitations of superfluid $^4$He has been measured at very low temperatures, from saturated vapor pressure up to solidification, using a high flux time-of-flight neutron scattering spectrometer
Externí odkaz:
http://arxiv.org/abs/2012.09067
The dynamic structure function $S(k,\omega)$ informs about the dispersion and damping of excitations. We have recently (Phys. Rev. B {\bf 97}, 184520 (2018)) compared experimental results for $S(k,\omega)$ from high-precision neutron scattering exper
Externí odkaz:
http://arxiv.org/abs/1905.04759
Publikováno v:
Phys. Rev. B 97, 184520 (2018)
The dynamic structure factor of superfluid $^4$He has been investigated at very low temperatures by inelastic neutron scattering. The measurements combine different incoming energies resulting in an unprecedentedly large dynamic range with excellent
Externí odkaz:
http://arxiv.org/abs/1802.08120
Autor:
Beauvois, K., Campbell, C. E., Dawidowski, J., Fåk, B., Godfrin, H., Krotscheck, E., Lauter, H. -J., Lichtenegger, T., Ollivier, J., Sultan, A.
Publikováno v:
Phys. Rev. B 94, 024504 Published 11 July 2016
The dynamics of superfluid 4He at and above the Landau quasiparticle regime is investigated by high precision inelastic neutron scattering measurements of the dynamic structure factor. A highly structured response is observed above the familiar phono
Externí odkaz:
http://arxiv.org/abs/1605.02638
Autor:
Defoort, M., Dufresnes, S., Ahlstrom, S. L., Bradley, D. I., Haley, R. P., Guénault, A. M., Guise, E. A., Pickett, G. R., Poole, M., Woods, A. J., Tsepelin, V., Fisher, S. N., Godfrin, H., Collin, E.
Publikováno v:
Online first J. of Low Temp. Phys. (2015)
We have measured the interaction between superfluid $^3$He-B and a micro-machined goalpost-shaped device at temperatures below $0.2\,T_c$. The measured damping follows well the theory developed for vibrating wires, in which the Andreev reflection of
Externí odkaz:
http://arxiv.org/abs/1512.01033
Autor:
Collin, E., Defoort, M., Lulla, K., Moutonet, T., Heron, J. -S., Bourgeois, O., Bunkov, Yu. M., Godfrin, H.
Publikováno v:
Rev. Sci. Instrum. Vol. 83, 045005 (2012)
We report on experiments performed in vacuum and at cryogenic temperatures on a tri-port nano-electro-mechanical (NEMS) device. One port is a very non-linear capacitive actuation, while the two others implement the magnetomotive scheme with a linear
Externí odkaz:
http://arxiv.org/abs/1511.07288
Publikováno v:
Phys. Rev. B 84, 054108 (2011)
We report on measurements performed at low temperatures on a nanoelectromechanical system (NEMS) under (capacitive) parametric pumping. The excitations and detection schemes are purely electrical, and enable in the present experiment the straightforw
Externí odkaz:
http://arxiv.org/abs/1511.07280
Autor:
Armengau, E., Bauer, M., Bavykina, I., Benoit, A., Bento, A., Blumer, J., Bornschein, L., Broniatowski, A., Burghart, G., Camus, P., Chantelauze, A., Chapellier, M., Chardin, G., Ciemniak, C., Coppi, C., Coron, N., Crauste, O., Danevich, F. A., Daw, E., Defay, X., De Jesus, M., de Marcillac, P., Deuter, G., Domange, J., Di Stefano, P., Drexlin, G., Dubovik, A. M., Dumoulin, L., Eitel, K., von Feilitzsch, F., Filosofov, D., Gandit, P., Garcia, E., Gascon, J., Gerbier, G., Gironnet, J., Glebovsky, V. G., Godfrin, H., Grigoriev, D., Grinyov, B. V., Grohmann, S., Gros, M., Hannewald, M., Hauff, D., Haug, F., Henry, S., Huff, P., Imber, J., Ingleby, S., Isaila, C., Jochum, J., Juillard, A., Kiefer, M., Kimmerle, M., Kluck, H., Kobychev, V. V., Kovtun, G. P., Kozlov, V., Kraus, H.
Workshop RPSCINT'2008 was organized in Kyiv (Ukraine) on 9th and 10th September 2008. The idea was to bring together physicists, chemists, crystal scintillator experts and manufacturers to discuss the requirements of low-count rate experiments, in pa
Externí odkaz:
http://arxiv.org/abs/0903.1539
In the framework of the ``ULTIMA'' project, we use ultra cold superfluid 3He bolometers for the direct detection of single particle events, aimed for a future use as a dark matter detector. One parameter of the pulse shape observed after such an even
Externí odkaz:
http://arxiv.org/abs/0710.3441
Publikováno v:
Phys. Rev. Lett. 100, 215304 (2008)
Deformation of aerogel strongly modifies the orientation of the order parameter of superfluid 3He confined in aerogel. We used a radial squeezing of aerogel to keep the orbital angular momentum of the 3He Cooper pairs in the plane perpendicular to th
Externí odkaz:
http://arxiv.org/abs/0707.3544