scholarly journals Study of Temperature Wave Propagation in Superfluid Helium Focusing on Radio-Frequency Cavity Cooling

2015 ◽  
Vol 101 ◽  
pp. 012164 ◽  
Author(s):  
T Koettig ◽  
B J Peters ◽  
S Avellino ◽  
T Junginger ◽  
J Bremer
Keyword(s):  
Wave Propagation ◽  
Radio Frequency ◽  
Superfluid Helium ◽  
Temperature Wave ◽  
Cavity Cooling

On the nature of the microwave field emerging from a composite pupil

2020 ◽  
Vol 34 (24) ◽  
pp. 2050247
Author(s):  
Ilaria Cacciari ◽  
Daniela Mugnai ◽  
Anedio Ranfagni
Keyword(s):  
Wave Propagation ◽  
Stochastic Model ◽  
Radio Frequency ◽  
Delay Time ◽  
Microwave Field ◽  
Near Field ◽  
Phase Variation ◽  
Experimental Investigations ◽  
Frequency Signal ◽  
Made In

Further experimental investigations in the microwave field emerging from a composite pupil are reported in order to determine the nature of the wave propagation. The experiments consisted of delay-time measurements as a function of the distance of the detector from the pupil under test, as well as of the phase variation of a radio-frequency signal at 35 MHz that modulated the same microwave carrier at 9.33 GHz. In addition, measurements employing an admittance comparator were made in order to determine the character of the propagation impedance. All results obtained confirmed superluminal behavior in the near field, up to a distance of about 40 cm. These results were then interpreted within the framework of a stochastic model.

Self-consistent non-linear radio-frequency wave propagation and peripheral plasma biasing

2011 ◽  
Author(s):  
J. Jacquot ◽  
L. Colas ◽  
S. Heuraux ◽  
M. Kubič ◽  
J. P. Gunn ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Radio Frequency ◽  
Frequency Wave ◽  
Peripheral Plasma ◽  
Self Consistent ◽  
Non Linear ◽  
Radio Frequency Wave

Effect of gravitational acceleration on temperature wave propagation in a critical fluid

1998 ◽  
Vol 72 (1) ◽  
pp. 16-18 ◽  
Author(s):  
Koji Ishii ◽  
Toru Maekawa ◽  
Hisao Azuma ◽  
Shoichi Yoshihara ◽  
Mitsuru Onishi
Keyword(s):  
Wave Propagation ◽  
Temperature Wave ◽  
Gravitational Acceleration

Laser–radio-frequency double-resonance spectroscopy of84−87Rbisotopes trapped in superfluid helium

2014 ◽  
Vol 90 (5) ◽  
Author(s):  
Xiaofei Yang ◽  
Takeshi Furukawa ◽  
Takashi Wakui ◽  
Tomomi Fujita ◽  
Kei Imamura ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Superfluid Helium ◽  
Double Resonance ◽  
Resonance Spectroscopy ◽  
Double Resonance Spectroscopy
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