Actually it might be beaten by the new optogalvanic front-end of the next post.
03.03.2026 03:38
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Actually it might be beaten by the new optogalvanic front-end of the next post.
Barium ion spectroscopy at 493nm with improved low-noise optogalvanic front-end. You don't even need a lock-in amplifier at this point :D Top curves are raw ADC data.
XLRPD: Low-noise large-area photodetector with XLR interface and phantom power. Place near hollow cathode lamp, shoot laser into lamp, and plug into audio interface for DSP lock-in spectroscopy. Easy to set up and unbeatable performance/cost.
git.m-labs.hk/sinara-hw/xl...
git.m-labs.hk/sb10q/sndlock
The amp schematics github.com/m-labs/spect...
"NTE" transistors are just rebranded and expensive Sanyo parts, but I didn't know better back then.
Among other fun stuff, I could easily plot the stability diagram of protons. Perhaps I should fish out the results from my archives and post them :)
Years ago I played with HDTV transistors and a second-hand commercial RGA tube. Designed a broadband amp with 600mA capability and 20MHz large signal bandwidth at 120Vpp and used a pair of them.
Some RF source designs for quadrupole mass spectrometers do the latter, but only at 2MHz or so (AFAIK).
Do you have references on that?
There's still the trap capacitance issue, resonant designs solve it by recycling the charge. And switching power MOSFETs above a few MHz is nontrivial.
For max efficiency, solution is perhaps square wave into a LPF loosely coupled into a LC in parallel with the trap.
You've had it with the CUPS print server? Replace it with this 36-line #NixOS hack: git.m-labs.hk/M-Labs/it-in... #Linux #SysAdmin
Just run it with encryption disabled. Not enough new projects and experiments in hamradio!
We're leaving GitHub. ARTIQ and other main repositories will be progressively moved to git.m-labs.hk
Forum post: forum.m-labs.hk/d/1070-shoul...
Pour STM32 il suffit de passer à cargo, rustc, probe-rs et co, non?
Hello Bluesky!
