Message-ID: <6EF9F446BFC542A99B9E030085412497@White>
From: "Markus Vester" <markusvester@aol.com>
To: <rsgb_lf_group@blacksheep.org>
References: <BDEMKFCNLMIILGIFNONNCEEEDPAA.victor13@online.nl>
Date: Sat, 1 Oct 2011 19:09:40 +0200
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Subject: LF: Superconducting resonators
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Hi Victor,

in the 1990s, I was involved with similar work in the context of a 
superconducting MRI receive coil *. To avoid the losses of the capacitors 
and the connections, we used a self resonant double-spiral design, using the 
LaAlO3 substate as a high-Q dielectric. At 8.25 MHz, Q-factors of up to 
500000 were achieved.

Best regards,
Markus (DF6NM)

* M. Vester, F. Steinmeyer, B. Roas, G. Thummes, K. Klundt
"HTS surface coils with liquid nitrogen or pulse tube refrigeration"
Proc. Soc. Magn. Reson., vol. 3, p. 1528, 1997



From: victor13@online.nl
Sent: Saturday, October 01, 2011 8:59 AM
To: rsgb_lf_group@blacksheep.org
Subject: RE: LF: Ferrite RX antennas


Hi Stefan,

at the institute I am working we are using lithographic superconducting 
coils with special NPO capacitors In the range from 100KHz to 5MHz Q up to 
5000 is optained....


73

Victor

...