Pressure cell for radio-frequency dielectric measurements at low temperatures

2018 ◽  
Vol 89 (5) ◽  
pp. 054708 ◽  
Author(s):  
R. Rösslhuber ◽  
E. Uykur ◽  
M. Dressel
Keyword(s):  
Radio Frequency ◽  
Low Temperatures ◽  
Dielectric Measurements ◽  
Pressure Cell

DISCOVERY OF DICKE SUPERRADIATION BY SYSTEM OF NUCLEAR MAGNETIC MOMENTS

1988 ◽  
Vol 01 (11n12) ◽  
pp. 409-416 ◽  
Author(s):  
J.F. KISELEV ◽  
A.F. PRUDKOGLYAD ◽  
A.S. SHUMOVSKY ◽  
V.I. YUKALOV
Keyword(s):  
Radio Frequency ◽  
Resonance Frequency ◽  
Low Temperatures ◽  
Magnetic Moments ◽  
Larmor Frequency ◽  
Coherent Radiation ◽  
Spontaneous Generation ◽  
Oscillatory Circuit ◽  
Nuclear Magnetic Moments ◽  
The Moment

Spontaneous generation of the Dicke superradiation (SR) state has been found in the system of inversely polarised proton spins with “frozen” polarisation. SR is observed at the moment when the Larmor frequency crosses the resonance frequency of the passive oscillatory circuit. SR arises from incoherent maser generation of spins. The frequency of a SR generator can be retuned from several hundreds of kilohertz to hundreds of megahertz at very low temperatures. Dependence of incoherent and coherent radiation on the initial polarisation has been investigated. A radio frequency analogue of the optical SR laser is shown to be possible both for weak-amplifying and for strong-amplifying active media, depending on the factor of filling and polarisation of nuclei. SR-reverse of negative polarisation is observed in the latter case.

Versatile high pressure cell for use at low temperatures

1974 ◽  
Vol 45 (11) ◽  
pp. 1353-1355 ◽  
Author(s):  
J. S. Schilling ◽  
U. F. Klein ◽  
W. B. Holzapfel
Keyword(s):  
High Pressure ◽  
Low Temperatures ◽  
High Pressure Cell ◽  
Pressure Cell

Cell for Dielectric Measurements in the High Radio Frequency Region

1968 ◽  
Vol 39 (10) ◽  
pp. 1456-1458 ◽  
Author(s):  
C. T. O'Konski ◽  
Adrian Edwards
Keyword(s):  
Radio Frequency ◽  
Frequency Region ◽  
Dielectric Measurements
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