🎉We can now proudly present the winners of the TAPAS Community Challenge 2018! 🎉
Congratulations to Team "Wireless Charging" (idea 56). We are really excited for all finalists and a really big thank you to all participants for your interest in this challenge!

We got over 200 submissions! 65 ideas got one or more TAPAS boards, 10 submissions were presentation-ready.
And now we have 5 finalists! YEAH 😃 The finalist's idea numbers were 40, 56, 68, 212 and 213.
What's next?
We are now preparing the next steps for you, the community. Please stay tuned!
We are working on a forum and a separate webpage. If you have any question please don't hesitate to contact us via email!


Software-defined current modulation for generating magnetic field waveforms

Goal

The goal of this project is to create a system which can modulate high currents passing through coils, in order to generate magnetic field waveforms, i.e. temporal variations of magnetic fields which are mathematically defined

WHO WOULD BENEFIT FROM IT?

Since this is a totally new approach to combining lasers and magnetic fields, a variety of scientific and technological fields can benefit. Hyperpolarized tracers have tremendous importance in a) NMR spectroscopy and analytical chemistry, b) food quality control c) medical imaging and even d) particle and nuclear physics.

Due to the nature of open-source hardware, various laboratories can benefit, especially the ones with limited funding, since this would open new applications despite being an inexpensive solution. Finally, the description of the physical part of these studies, as well as the results, will be made public though peer-reviewed publications, conference presentations etc.

Technical Setup

Laser excitation can produce nuclear-spin polarized (hyperpolarized) molecular samples, since it provides access to the angular momentum projection of the molecule, which is later coupled to the nuclear spin. However, this transfer is temporary. Magnetic fields can be used to ‘lock’ the polarization to the nucleus, however, for the process to be successful, the magnitude of the magnetic field must vary in time in a specific way.

The design of the coils and metallic cores can be designed using dedicated software such as Comsol. The functions controlling the magnetic field are studied theoretically, taking into the effect of coil inductance. Finally, the polarization of the nuclei can be detected using lasers; this can provide feedback to the design of the magnetic waveforms, since a perfect a-priori design will be impossible due to difficulties in taking into account the specific environment, optical excitation imperfections, magnet imperfections and more.

A simplified description of the proposed experiments, with the example of the ammonia molecule, is shown in Figure 1. The molecules are optically excited, and their electrons are polarized in a way which initiates a polarization exchange between the electrons and the nuclei; this polarization exchange must be terminated using specifically designed magnetic fields, in a timing which allows ‘locking’ the polarization to the nuclei.

Team

Prof. Peter T. Rakitzis

Foundation for Research and Technology – Hellas, Institute of Electronic Structure and Lasers

University of Crete, Physics Department

 

Dimitris Sofikitis, PhD
Postdoc researcher and visiting professor
Foundation for Research and Technology – Hellas, Institute of Electronic Structure and Lasers

University of Crete, Physics Department

 

Chrisovalandis Kannis

PhD student
Foundation for Research and Technology – Hellas, Institute of Electronic Structure and Lasers

University of Crete, Physics Department

 

Alexandros Spiliotis
PhD student
Foundation for Research and Technology – Hellas, Institute of Electronic Structure and Lasers

University of Crete, Physics Department

  • Dimitris Sofikitis
  • May 25 2018
  • May 30, 2018

    Admin Response

    this idea gets one TAPAS dev kit

  • Stefan Steinmüller [TAPAS team] commented
    29 May 07:29

    Hello Dimitris,

    Thank you for your very interesting Idea.

    One thing is missing, you did not mention the amount of TAPAS Boards you need for implementing your idea. From your figure I assume that one is enough. Please confirm that so we can decide about your Idea.

     

    Regards,

    Stefan @ TAPAS Team

  • Dimitris Sofikitis commented
    29 May 07:54

    Dear Stephan, I will indeed need only one board for my application.

    Thanks

    Dimitris

  • Dimitris Sofikitis commented
    29 May 07:58

    Dear Stephan, I will indeed need only one board for my application.

    Thanks

    Dimitris

  • Susanne Forster commented
    29 May 13:57

    Hey Dimitris, 

    thanks for your submission.
    We want to provide you a TAPAS board.
    One of my colleagues will message you shortly.

    Best,
    Susanne @ TAPAS team

  • Admin
    Nora Schille (TAPAS team) commented
    04 Jun 14:03

    Hey Dimitris,

    I hope the board will arrive soon (or is it already arrived?).  We shipped it last week.
    Here is just a friendly reminder that submission deadline for your presentation is on 24th of June. :-) We are really excited to see your progress! 
    Please post the progress within your idea board submission.

    PS: We want to do a community call with you! Please use our doodle to find a date which fits best for you. :-)

    Best,
    Nora @ TAPAS Team

  • Jacqueline Hofmann commented
    20 Jun 12:47

    Hey Dimitris,

    Please keep in mind that the submission deadline for your presentation is on 24th of June! We are already looking forward to seeing how you brought the TAPAS board to life! :-) Remember that you still have time to work on the implementation of your idea after the submission!

    Please upload your presentation and everything you want to share with us in your idea board entry.

    Good luck :-)

    Jacqueline @ TAPAS Team



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