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Author Topic: Nuclear Magnetic Resonance (NMR)  (Read 11037 times)

Offline EMJunkie

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #75 on: August 14, 2020, 03:08:11 AM »
Quote from: Smudge link="https://www.overunityresearch.com/index.php?topic=3924.msg83843#msg83843" date=1597169605

Sorry for the delay in replying but I have been busy dealing with family matters.  Going back to your data posted in reply 510 where you observed a resonance at 5.695MHz.  I misunderstood the set up so my reply 512 where I thought this would be a problem was wrong.  Your reply 518 showed the set up and (if we ignore the small phase delays along the coax cables) you had the pancake coils connected in parallel having an inductance that you quoted earlier as 4.9uH at the 16mm separation, and the signal was fed from transmitter to receiver through this inductance.  The coax connections added lumped capacitance across each coil, and you also had earlier measurements of intra-turn capacitance of 174.75pF for a single pancake coil, which is far greater than the coax capacitance.   Thus you had the signal being fed through a parallel LC circuit that calculates to have a resonance of 3.85MHz based on those values, whereas the actual resonance was that 5.695MHz.  That created the dip in transmission.  That is a good result since in the actual NMR experiment we want to use resonance to get maximum current into the coils, and we can easily lower the self resonance by adding capacitance.  The bad news is that we cannot use the input matching circuit I originally proposed, which puts a high value capacitance in series with the one producing the resonance.

Now answering your specific questions, your method of connecting the coils via the S21 fixture and the Tee is simply connecting the parallel LC circuit across the 50 Ohm signal source.  This is of course a complete mismatch at resonance and does not make use of the high Q that can be obtained with better matching.  So I would expect the signal induced into the H-field sensor to follow a low Q resonance peaking at 5.9MHz.  For the phase plot I would expect this be +90 degrees at the lowest frequency, falling as the frequency rises then rising again to pass through +90 degrees at that self resonant frequency, then rising towards +180 degrees.

To maximize the current into the coils we must use a high impedance source, and that requires a step-up transformer between the 50 ohm signal source and the coils.  I am sorry that this wasn't made clear at the start, but I did not envisage the complex interleaved winding arrangements that would create such huge self capacitance.

Smudge



Aww, that's a shame, it appears there is a lot of problems in the NMR Experiment.

I hope the guys can get the problems sorted soon! Its great to see such a wonderful bunch of people working on this! Lets get to the bottom of this and see whats really achievable from the best minds on the planet! I hope, soon we can see some real progress!

Best wishes, stay safe and well in these dire times,
   Chris

Free Energy | searching for free energy and discussing free energy

Re: Nuclear Magnetic Resonance (NMR)
« Reply #75 on: August 14, 2020, 03:08:11 AM »

Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #76 on: August 16, 2020, 06:41:21 PM »

https://www.overunityresearch.com/index.php?topic=3924.msg83849;topicseen#msg83849
Hoping things go better for you and family Cyril
Will keep your wife  in our thoughts for speedy recovery.



Thanks for all you do,
 I apologize for continuing Taunts above! ( most likely he would not allow this behavior
For an instant At his forum!


With gratitude


Chet



Offline EMJunkie

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #77 on: August 17, 2020, 01:44:42 AM »


Wishing for a speedy and full recovery also!

No "taunt" was intended! Well wishing was!

Best wishes,
   Chris

Free Energy | searching for free energy and discussing free energy

Re: Nuclear Magnetic Resonance (NMR)
« Reply #77 on: August 17, 2020, 01:44:42 AM »
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Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #78 on: August 22, 2020, 02:09:48 PM »

Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #79 on: September 04, 2020, 04:58:22 PM »

Free Energy | searching for free energy and discussing free energy

Re: Nuclear Magnetic Resonance (NMR)
« Reply #79 on: September 04, 2020, 04:58:22 PM »
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Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #80 on: September 12, 2020, 11:24:08 PM »

Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #81 on: September 15, 2020, 12:05:43 AM »
some investigation and data from prototype

https://www.youtube.com/watch?v=xJtPG3lDiEM

Free Energy | searching for free energy and discussing free energy

Re: Nuclear Magnetic Resonance (NMR)
« Reply #81 on: September 15, 2020, 12:05:43 AM »
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Offline ramset

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Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #83 on: September 17, 2020, 04:47:49 PM »
amazingly elusive and hard ground to cover [new untested protocols]
https://www.overunityresearch.com/index.php?topic=3924.msg84333;topicseen#msg84333
tremendous gratitude here.




Free Energy | searching for free energy and discussing free energy

Re: Nuclear Magnetic Resonance (NMR)
« Reply #83 on: September 17, 2020, 04:47:49 PM »
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Offline Turbo

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #84 on: September 18, 2020, 06:54:51 PM »
That last pic is good but to drive like that is critical in terms of timing even the connecting leads have to be cut to match half and quarter wavelengths and its a key element in separating and extracting and decoupling the in and out coming signals from each other without overloading the pre amp.
Both should be close to exact opposites as possible on the Smith chart.

Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #85 on: September 18, 2020, 08:44:33 PM »
Can you verify which Pic [or in which post please ?
thanks for looking and commenting !
 
https://www.overunityresearch.com/index.php?topic=3924.msg84333;topicseen#msg84333

Free Energy | searching for free energy and discussing free energy

Re: Nuclear Magnetic Resonance (NMR)
« Reply #85 on: September 18, 2020, 08:44:33 PM »
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Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #86 on: September 21, 2020, 06:21:18 PM »
perseverance will hopefully help to sort the difficulties encountered when prototyping [open source prototyping ]
https://www.overunityresearch.com/index.php?topic=3924.msg84407;topicseen#msg84407


Offline ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #87 on: September 26, 2020, 02:58:05 PM »

Offline ramset

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Offline ramset

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