Tabletop NMR

Free Induction Decay (FID)  The magnetic field is most likely not homogeneous. Han-echo to get rid of inhomogeneity. (Gets rid of field) 

 Analog Discovery 2 This is what circuit b should be producing (fig. 3 from Michal's paper). It smoothes out and amplifies the square waves into sine waves. How do we test that circuit b is functioning correctly? Would having circuit b and c on different boards be easier to troubleshoot? FID - Free Induction Decay *should resemble a damped oscillator that persists for approx 1 second (1000 milliseconds) The FID's we get are never right. The conversion from the FID to the spectrum happens with FFT (Fast Fourier Transform) There were a few tests done with the ANMR software: No Pulse, Pulser, Single Pulse, Spin Echo, and CPMG. No Pulse tests the FID/Spectrum to see what background appears if no pulses are sent. (Not needed to test) Pulser  sends 2 adjustable sets of pulses to generate fig. 3. (not sure?) Single Pulse/One Pulse used for tau_90 calibration ; Magnetic Field might be faulty; We should make sure single pulse works first.  Spin echo seemed to work. (confirmed b...

 Lots has happened in a short time! Grace got a nice animation going on a simple coil- so we have step one of our AR demo going great!! Hassel contacted Meredith Frey for some insight on the NMR itself and just to clarify anything. I think this is a perfect opportunity to ask about what I talked about in my last post- about the step by step process of what happens with the NMR as it reads the chemical makeup of the sample. We'll be meeting sometime next week, so I'll probably meet with grace at some point to discuss what we should ask. Hassel also told us that he has been trying out a tool called Analog Discovery from McColgan. He said "It does the job of several different electronic test apparatus, mainly for us it does Oscilloscope and FFT." He's using it to test what the arduino is doing to send pulses out. He was also thinking about mailing it out to me for me to try along with some other stuff.  I think today I'm going to research more on these pulses and...

So I've been working on two things which are kind of overwhelming. There's the remaking of the pcb and the modeling of pieces for an AR model of the NMR we are building. The modeling is being done from scratch on tinkercad. Hassel has explained what most of the components are so I have an idea of what to build next, but I think I'll need more help identifying what is what. Along with the modeling, I have to start researching what is actually happening in the whole process of the NMR reading the chemical makeup of whatever is inside of it. When I have a step-by-step understanding of what goes on, I think modeling will get easier because we can display it like a movie. For example, there will be a current going through the coils which makes a magnetic field. That in itself is a small animation that can be done to show the electrons flow through the coils and make a field. But that's as far as I know. What happens after the field is created? How is the chemical makeup of t...

 This will just be a running list of all the 3D models I have made for Grace and the days done.  Torus arrow (6/21/21) Cone shaped spiral (6/22/21) Cone shaped spiral with a lower frequency (6/24/21) NMR AR models (6/24 - ) sample, transmit/receive coil, polarization coil (6/24)

Hassel, Grace, and I met with Lyniesha today to discuss ideas about AR and the app she created. One thing that really stood out to me was that she made this app over the course of about three years for her doctorate's thesis. Other than that confidence boost, I really liked an idea she proposed. I mentioned that I was working on troubleshooting the tabletop NMR and she said we could make that tabletop version into an AR version and almost try to animate the process to show exactly what happens.  That would require actually knowing what happens between the particles, so I guess I'll be researching more about NMR stuff. But since Grace is more familiar with Unity and the animations, I think I'll be more useful constructing the physical models for this project. I wouldn't mind learning Unity, but Grace is honestly doing really amazing with the current animations, I think I'd be better as an extra set of eyes and a model maker when I'm not working on the pcb/ waitin...

Something to remember: McColgan said we could possibly be meeting Lyniesha either 12-5 today or 10-5 Wednesday or Thursday. I need to make notes on her paper and formulate some questions/ideas to bring up. I tried reading it before, but it was really intensive and chemistry heavy. I'm personally terrible at understanding anything chemistry related, but I'm really going to try my best here :D After downloading the app 'H NMR MoleculAR', I tried to get a general feel for what it was supposed to do/be. I didn't get very far. It looks like the article is very chemistry intensive, so I'm kind of at a loss for understanding what majority/any of it means. I do like the ideas presented and the feedback from the students, proving it to be helpful.