Super conducting diodes?...

J

Jan Panteltje

Guest
Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm
A collaboration of FLEET researchers from the University of Wollongong and Monash University
have reviewed the superconducting diode effect, one of the most fascinating
phenomena recently discovered in quantum condensed-matter physics.
 
On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm
A collaboration of FLEET researchers from the University of Wollongong and Monash University
have reviewed the superconducting diode effect, one of the most fascinating
phenomena recently discovered in quantum condensed-matter physics.
Click to expand...

Low-noise diode-bridge mixer?
 
On a sunny day (Tue, 03 Oct 2023 05:40:06 -0700) it happened John Larkin
<jl@997arbor.com> wrote in <cs2ohit552f5se6anim5i01r738evdhdpj@4ax.com>:

On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <alien@comet.invalid
wrote:

Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm
A collaboration of FLEET researchers from the University of Wollongong and Monash University
have reviewed the superconducting diode effect, one of the most fascinating
phenomena recently discovered in quantum condensed-matter physics.

Low-noise diode-bridge mixer?
Click to expand...

Dunno, but very high currenr rectifiers?
 
On Tue, 03 Oct 2023 15:16:39 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

On a sunny day (Tue, 03 Oct 2023 05:40:06 -0700) it happened John Larkin
jl@997arbor.com> wrote in <cs2ohit552f5se6anim5i01r738evdhdpj@4ax.com>:

On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <alien@comet.invalid
wrote:

Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm
A collaboration of FLEET researchers from the University of Wollongong and Monash University
have reviewed the superconducting diode effect, one of the most fascinating
phenomena recently discovered in quantum condensed-matter physics.

Low-noise diode-bridge mixer?

Dunno, but very high currenr rectifiers?
Click to expand...

I\'d guess the diodes work at millivolts and milliamps.
 
On Tuesday, October 3, 2023 at 5:40:26 AM UTC-7, John Larkin wrote:
On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <al...@comet.invalid
wrote:
Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm

Low-noise diode-bridge mixer?
Click to expand...

Yeah, maybe, but the effect is to go from superconducting to plain old
metallic conducting, not \'switch off\'; that means the impedance of the mixer
is milliohm-or-less.

Got any good 0.005 ohm transmission line designs?
 
On Tuesday, 3 October 2023 at 17:34:52 UTC+1, whit3rd wrote:
On Tuesday, October 3, 2023 at 5:40:26 AM UTC-7, John Larkin wrote:
On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <al...@comet.invalid
wrote:
Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm
Low-noise diode-bridge mixer?

Yeah, maybe, but the effect is to go from superconducting to plain old
metallic conducting, not \'switch off\'; that means the impedance of the mixer
is milliohm-or-less.

Got any good 0.005 ohm transmission line designs?
Click to expand...

Yeah, bit hard to get it through the door tho. Tracks are kinda wide.
 
On a sunny day (Tue, 03 Oct 2023 09:01:30 -0700) it happened John Larkin
<jl@997arbor.com> wrote in <gleohip8is9l1afcs9tup15m88rrdjvu2n@4ax.com>:

On Tue, 03 Oct 2023 15:16:39 GMT, Jan Panteltje <alien@comet.invalid
wrote:

On a sunny day (Tue, 03 Oct 2023 05:40:06 -0700) it happened John Larkin
jl@997arbor.com> wrote in <cs2ohit552f5se6anim5i01r738evdhdpj@4ax.com>:

On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <alien@comet.invalid
wrote:

Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm
A collaboration of FLEET researchers from the University of Wollongong and Monash University
have reviewed the superconducting diode effect, one of the most fascinating
phenomena recently discovered in quantum condensed-matter physics.

Low-noise diode-bridge mixer?

Dunno, but very high currenr rectifiers?

I\'d guess the diodes work at millivolts and milliamps.
Click to expand...

If superconducting it should work at much lower voltages, mayve microvolts?
Could perhaps be used for power generation from small temperature variatios,
I like the thermocouple high voltage generator, like this:
https://panteltje.nl/pub/lighting_a_LED_with_a_candle_setup_IMG_3607.GIF
https://panteltje.nl/pub/lighting_a_LED_with_a_candle_circuit_diagram_with_added_power_MOSFET.gif
 
On Wednesday, October 4, 2023 at 11:06:31 AM UTC+11, Tabby wrote:
On Tuesday, 3 October 2023 at 17:34:52 UTC+1, whit3rd wrote:
On Tuesday, October 3, 2023 at 5:40:26 AM UTC-7, John Larkin wrote:
On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <al...@comet.invalid
wrote:
Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm
Low-noise diode-bridge mixer?

Yeah, maybe, but the effect is to go from superconducting to plain old
metallic conducting, not \'switch off\'; that means the impedance of the mixer
is milliohm-or-less.

Got any good 0.005 ohm transmission line designs?

Yeah, bit hard to get it through the door tho. Tracks are kinda wide.
Click to expand...

Tabby seems to have been using a one of the simple formulae for calculating transmission line impedance that you find in ECL application notes. They lose accuracy outside the range 50R to 75R.

The proper calculations are rather more complicated. and don\'t seem to offer 5mR transmission lines.

https://avtechpulse.com/catalog/page_new_av-clz_rev7.pdf

offers a 1R line, but seems to get it by paralleling a lot 5OR cables.

--
Bill Sloman, Sydney
 
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