Effect of vibration of NMR probe (400 MHz): checking how the impedance of the resonator is affected by the vibration created by a mobile phone. Plot: phase modulation with and without vibration.

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Digital control of feedback phase to control radiation damping in water: a project I started from level zero and finally completed. Now the Bruker AU program is capable of finding the radiation damping suppression phase fully automatically.
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Finally, the digitization of the Radiation damping control unit is done. Bruker AU program for automating NMR experiments by digitally controlling the radiation feedback field phase.

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The Bruker AU program sends instructions to the FPGA. #NMR #TopSpin #NMRchat

Finally, the 16-bit digital-to-analog converter (DAC714) is working. In a few weeks, Bruker Topspin will take control of the DAC via FPGA (UART and SPI). And then the phase shifter of the radiation damping control unit.
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The FPGA programming is completed for controlling a voltage-controlled phase shifter via a 16-bit DAC (DAC714) using SPI for a digitalized radiation damping control unit for doing feedback-based Maser/Raser experiments.

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Here’s a one-page story. If you find it meaningful, share it with a friend pursuing a PhD who might be going through some small struggles.

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Here is an example of magic angle spinning (CSA) in PyOR. The next implementation will be hyperpolarization + EPR.

Visit GitHub: github.com/VThalakottoo...

Example MAS: github.com/VThalakottoo...

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Python On Resonance (PyOR)
"Everybody can simulate NMR"

Here is the PyOR's documentation page: vthalakottoor.github.io/PyOR/

Github: github.com/VThalakottoo...

DOI: doi.org/10.5281/zeno...

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It was worth building a 285 MHz resonator to spin the protons at 1.2 K for an extended period. NMR Maser from frozen water via DNP. #NMR #NMRchat

I have attended all summer schools (2020, 2023 to 2025) at Schloss Windischleuba (a beautiful castle) in Germany, organized by Jörg Matysik (Uni. of Leipzig). These schools have been my only classroom experience in learning NMR. Feel free to explore them yourself.
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Here is an equation I derived for the vibration effect in NMR spectra. It is very similar to EOM (electro-optic modulator) in optics #NMR #NMRchat

I was thinking of using the Bruker AU program to communicate with a wide range of instruments during my PhD days onwards. Today I established communication with an oscilloscope via "visa", a small move but may (will) be helpful for many NMR instrumentation people
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I have uploaded a new version of PyOR (Python On Resonance) which is more user-friendly with more functionalities. I will upload more examples in the coming days. Looking forward to your feedback.

github.com/VThalakottoo...

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India has two classical music traditions: Hindustani & Carnatic. Just heard Garaj Garaj... in Raga Megh Malhar, such a beautiful song with deep meaning!
www.youtube.com/watch?v=DkgN...

Simulating Mz profile (Rsnob.1000) using PyOR and comparing with shape Tool of Bruker Topspin.
(PyOR can take Bruker shape file for simulation)
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ON and OFF, the LED on an Arduino via TopSpin AU Program. The first stage to control the radiation-damping control unit from Topspin.
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