Vineeth Francis Thalakottoor

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.
#NMRchat #NMR

YouTube video by Global NMR Discussion Meetings PyOR: A Versatile Magnetic Resonance Simulator | Dr. Vineeth Francis Thalakottoor | Session 105

Here is the link to the talk about PyOR, which I gave at the 105th Global NMR Discussion meetings: youtu.be/S45ps8uQJcc

#NMR #PyOR #NMRchat

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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Here are the slides (link below) of the talk I gave at the 105th Global NMR Discussion Meeting. I thank the organizers for the opportunity to present PyOR.
github.com/VThalakottoo...
#NMR #PyOR #NMRchat

Join us on Tuesday, September 9, at 5 PM Paris/ 11 AM Boston/8:30 PM Delhi for a talk by Dr. Vineeth Francis Thalakottoor: PyOR: A Versatile Magnetic Resonance Simulator for Learning and Teaching #NMR #NMRchat #ChemSky

Join our Cloud HD Video Meeting Zoom is the leader in modern enterprise cloud communications.

Interested to know about PyOR (Python On Resonance)?
Attend the 105th Global NMR meeting.
Title: PyOR: A Versatile Magnetic Resonance Simulator for Learning and Teaching
Time: Tuesday, September 9th, 11:00 AM Boston/ 5:00 PM Paris/ 8:30 PM Delhi
Link: nyu.zoom.us/j/91419770855
#NMR #NMRchat

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

Hexadecimal values 7FFF, 8000, and 0000 correspond to 10V, 0V, and 5V, respectively.

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.
#NMR #FPGA #NMRchat

From bottom, 16-bit data (7F01), chip select, Enable input register of DAC, Enable D/A Latch (DAC), and SPI clock.

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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abstract: euromar2025.org/assets/pdf/E...
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I will be presenting a poster at EUROMAR 2025 in Oulu on the topic of NMR masers and PyOR:
“NMR Masers: From Single-Mode DNP Hyperpolarization at 1.2 K to Multimode Masers in Solution via Electronic Control of Radiation Feedback.”
poster: HYP 008
#NMR #NMRchat

Here is my second post about "Simulating a Spectrum" with PyOR, on MARQUISE - Magnetic Resonance
Quantum Information
Science and Education (quantum-resonance.org): quantum-resonance.org/introduction...
Follow MARQUISE: www.linkedin.com/company/marq...

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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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MARQUISE Education | LinkedIn MARQUISE Education | 75 followers on LinkedIn. A platform for learners, by learners in Magnetic Resonance Quantum Information Science and Education | Our mission is to develop and distribute education...

In this first post, I introduce some key features of PyOR and the concept of "Quantum Objects." Curious about how quantum objects are created in PyOR? Check out the link — and don’t forget to follow MARQUISE Education (www.linkedin.com/company/marq...) for my future posts!

#NMR #NMRchat

Introduction to PyOR: A versatile NMR Simulator his post introduces PyOR (Python On Resonance) — a versatile NMR simulator designed to address a wide range of magnetic resonance problems.

Hello everyone! I’m excited to share that I had the wonderful opportunity to write about PyOR (Python On Resonance) through MARQUISE — a platform by learners, for learners in Magnetic Resonance Quantum Information Science and Education.
quantum-resonance.org/introduction...

#NMR #NMRchat

GitHub - VThalakottoor/Serial_Bruker_AUprogram_Arduino Contribute to VThalakottoor/Serial_Bruker_AUprogram_Arduino development by creating an account on GitHub.

For anyone interested in implementing serial and VISA communication in Bruker's AU programs to automate NMR experiments with external instruments, here are the programs I made:

1. Serial: github.com/VThalakottoo...

2. Visa: github.com/VThalakottoo...

#NMR #NMRchat

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...

#NMR #NMRchat

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...

#NMR #NMRchat

GitHub - VThalakottoor/PyOR: Python On Resonance (PyOR), a versatile NMR simulator Python On Resonance (PyOR), a versatile NMR simulator - VThalakottoor/PyOR

I am excited to announce the first major release of PyOR (Python On Resonance)!

PyOR is now modular: github.com/VThalakottoo...

Download & cite: doi.org/10.5281/zeno...

Here is a powder-averaged spectrum (CSA) simulated using PyOR: github.com/VThalakottoo...

#NMR #NMRchat

PyOR/Examples/Hamiltonians/DipolarHamiltonian.ipynb at main · VThalakottoor/PyOR Python On Resonance (PyOR), a versatile NMR simulator - VThalakottoor/PyOR

PyOR is making small steps to do solid-state NMR. Look at this example about dipolar Hamiltonian and interaction tensor, Euler and Wigner rotation, and Wigner matrix. If you find something is wrong write to me. #NMR #NMRchat

github.com/VThalakottoo...

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

cidnp.net/summerschools
I am also grateful to the organizer for allowing me to present PyOR for 15 minutes.
#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.
#NMR #NMRchat

The voltage induced by the spins will not be affected but voltage measured by the spectrometer may be affected. Because the vibration affects the impedance (my assumption), in the derivation I only assumed the impedance phase would be affected (hence the sidebands). I think |Z| may get modulated too

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

PyOR Quantum does not use QuTiP or any other quantum package for simulation; all code is written using NumPy and SciPy. #NMR #NMRchat

Here are the presentation slides about PyOR Magnetic Resonance and PyOR Quantum from the talk I gave in the ENS RMN group meeting. It is a short introduction to the "new" PyOR.

github.com/VThalakottoo...

#NMR #NMRchat