Strings that can vibrate forever (kind of)
https://www.sciencedaily.com/releases/2024/05/240522130402.htm
Source:
Delft University of Technology
Summary:
Researchers have engineered string-like resonators capable of vibrating longer at ambient temperature
than any previously known solid-state object -- approaching what is currently only achievable near absolute zero temperatures.
Their study pushes the edge of nanotechnology and machine learning to make some of the world's most sensitive mechanical sensors.
Interesting for inertial navigation!
Mechanical 214 kHz resonator with a Q of 6.6 billion at room temperature
see paper:
https://www.nature.com/articles/s41467-024-48183-7
figure 4
Strings that can vibrate forever (kind of)
https://www.sciencedaily.com/releases/2024/05/240522130402.htm
Source:
Delft University of Technology
Summary:
Researchers have engineered string-like resonators capable of vibrating longer at ambient temperature
than any previously known solid-state object -- approaching what is currently only achievable near absolute zero temperatures.
Their study pushes the edge of nanotechnology and machine learning to make some of the world's most sensitive mechanical sensors.
Interesting for inertial navigation!
Mechanical 214 kHz resonator with a Q of 6.6 billion at room temperature
see paper:
https://www.nature.com/articles/s41467-024-48183-7
figure 4
On Thu, 23 May 2024 05:08:10 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Strings that can vibrate forever (kind of)It might not have the stability or tempco of a quartz crystal. The SiN
https://www.sciencedaily.com/releases/2024/05/240522130402.htm
Source:
Delft University of Technology
Summary:
Researchers have engineered string-like resonators capable of vibrating longer at ambient temperature
than any previously known solid-state object -- approaching what is currently only achievable near absolute zero temperatures.
Their study pushes the edge of nanotechnology and machine learning to make some of the world's most sensitive mechanical sensors.
Interesting for inertial navigation!
Mechanical 214 kHz resonator with a Q of 6.6 billion at room temperature
see paper:
https://www.nature.com/articles/s41467-024-48183-7
figure 4
string will surely have a different thermal expansion factor than the
silicon substrate.
It would be cool to have a worldwide (or even in space) array of
thousands of 3-axis gravitational wave detectors, instead of just
three single-axis sites. We could image g-waves at high resolution.
On 5/23/24 07:08, Jan Panteltje wrote:
Strings that can vibrate forever (kind of)
https://www.sciencedaily.com/releases/2024/05/240522130402.htm
Source:
Delft University of Technology
Summary:
Researchers have engineered string-like resonators capable of vibrating longer at ambient temperature
than any previously known solid-state object -- approaching what is currently only achievable near absolute zero
temperatures.
Their study pushes the edge of nanotechnology and machine learning to make some of the world's most sensitive mechanical
sensors.
Interesting for inertial navigation!
Mechanical 214 kHz resonator with a Q of 6.6 billion at room temperature
see paper:
https://www.nature.com/articles/s41467-024-48183-7
figure 4
Interesting, indeed, but this looks *very* fragile!
On a sunny day (Thu, 23 May 2024 11:04:02 +0200) it happened Jeroen Belleman <jeroen@nospam.please> wrote in <v2n0m9$1m371$2@dont-email.me>:
On 5/23/24 07:08, Jan Panteltje wrote:
Strings that can vibrate forever (kind of)
https://www.sciencedaily.com/releases/2024/05/240522130402.htm
Source:
Delft University of Technology
Summary:
Researchers have engineered string-like resonators capable of vibrating longer at ambient temperature
than any previously known solid-state object -- approaching what is currently only achievable near absolute zero
temperatures.
Their study pushes the edge of nanotechnology and machine learning to make some of the world's most sensitive mechanical
sensors.
Interesting for inertial navigation!
Mechanical 214 kHz resonator with a Q of 6.6 billion at room temperature >>> see paper:
https://www.nature.com/articles/s41467-024-48183-7
figure 4
Interesting, indeed, but this looks *very* fragile!
Yes, but maybe not enough free space to move so much it breaks?
I just hope they used a Faraday cage and kept it away from other sources and their harmonics in the 214 kHz range.
Wallwarts! bats? some other piezo stuff.
On 5/25/24 07:04, Jan Panteltje wrote:
On a sunny day (Thu, 23 May 2024 11:04:02 +0200) it happened Jeroen Belleman >> <jeroen@nospam.please> wrote in <v2n0m9$1m371$2@dont-email.me>:
On 5/23/24 07:08, Jan Panteltje wrote:
Strings that can vibrate forever (kind of)
https://www.sciencedaily.com/releases/2024/05/240522130402.htm
Source:
Delft University of Technology
Summary:
Researchers have engineered string-like resonators capable of
vibrating longer at ambient temperature
than any previously known solid-state object -- approaching what is
currently only achievable near absolute zero
temperatures.
Their study pushes the edge of nanotechnology and machine learning to
make some of the world's most sensitive mechanical
sensors.
Interesting for inertial navigation!
Mechanical 214 kHz resonator with a Q of 6.6 billion at room temperature >>>> see paper:
https://www.nature.com/articles/s41467-024-48183-7
figure 4
Interesting, indeed, but this looks *very* fragile!
Yes, but maybe not enough free space to move so much it breaks?
As I understand it, if a string touches something, it tends to stick.
That was one of the problems that caused low yields in early devices.
I just hope they used a Faraday cage and kept it away from other sources
and their harmonics in the 214 kHz range.
Wallwarts! bats? some other piezo stuff.
With a Q > 1e9, coupling to outside influences is by definition
very weak. I don't see this thing becoming important as a low
noise oscillator element though. Pity. Maybe it's useful as a
precision thermometer.
Jeroen Belleman
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