- #1
uWave_Matt
- 21
- 0
Hi all - I've got a bit of hesitation regarding the next step in my research...
The setup: I've fabricated a uStrip HTSC resonator that I'm trying to characterize on a VNA. The sample is placed in a jig with coaxial feeds, and the jig is cooled via a cryo-cooler.
The problem I'm having is vibration caused by the cryo-cooler, which gives a very ugly trace and has vibrated my sample out from underneath the probes more than once. Given that the cooling process is long and I can't see the sample during the cooling, I don't know if the probes are still in contact with the resonator feed lines until the end of the cooling process when the sample chamber drops below 75-80K.
I'm thinking of soldering the sample into the jig, though I don't know how soldering temperatures and solder itself might affect the superconducting feed lines, nor do I know how solder behaves at low temperatures...
Another thought I had was putting double sided tape on the ground plane of the resonator so that it can't vibrate out from underneath the probes, but once again, I'm not sure what happens to the tapes adhesion at such cold temperature.
Do any of you fine engineers/researchers have any experience with any of the aforementioned issues?
The setup: I've fabricated a uStrip HTSC resonator that I'm trying to characterize on a VNA. The sample is placed in a jig with coaxial feeds, and the jig is cooled via a cryo-cooler.
The problem I'm having is vibration caused by the cryo-cooler, which gives a very ugly trace and has vibrated my sample out from underneath the probes more than once. Given that the cooling process is long and I can't see the sample during the cooling, I don't know if the probes are still in contact with the resonator feed lines until the end of the cooling process when the sample chamber drops below 75-80K.
I'm thinking of soldering the sample into the jig, though I don't know how soldering temperatures and solder itself might affect the superconducting feed lines, nor do I know how solder behaves at low temperatures...
Another thought I had was putting double sided tape on the ground plane of the resonator so that it can't vibrate out from underneath the probes, but once again, I'm not sure what happens to the tapes adhesion at such cold temperature.
Do any of you fine engineers/researchers have any experience with any of the aforementioned issues?