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Author Topic: Nuclear Magnetic Resonance (NMR)  (Read 35228 times)

ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #60 on: July 22, 2020, 11:03:35 PM »
some tuning discussion and "dialing in"
https://www.youtube.com/watch?v=ulA76NW0fT4
 

Turbo

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Smudge

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #62 on: July 24, 2020, 09:19:42 PM »
http://content.time.com/time/magazine/article/0,9171,837185,00.html
Why have you posted a link to  a 53 year old article on old CRT televisions?  What has this to do with NMR?
Smudge

ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #63 on: July 26, 2020, 01:31:12 AM »
Smudge
When Turbo first posted link it connected
With entire story


A story or article that I believe I had read here in years past
In TPU topic maybe


Now I see link is as pic below
No real frame of reference or perspective and request to sign up for membership ?






ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #64 on: July 27, 2020, 03:37:18 PM »

kajunbee

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #65 on: July 28, 2020, 03:11:58 AM »
Yes, a very interesting experiment and a wealth of knowledge to be gained. I’ve been doing research on nmr so as to better follow what is being discussed. This lead me to some other questions.  So as I understand the precession frequency is related to the strength of the static b field. And the static field will be provided by disk shaped magnets. Itsu stated that the precession frequency is 4.2 MHz. So I found a Larmor frequency calculator online and it gives a field strength of .1 Tesla. So if this is correct how do you determine the strength of the magnets that you will use. Is the magnetic field strength between 2 magnets additive. Meaning if one is 900 gauss and the other is 1000 gauss would you say the field strength is 1900 gauss or half or something in between. Also how does the separation distance effect the strength and uniformity of the field. I ask because according to the calculator a small deviation in field strength greatly influences the frequency. Hopefully this post makes sense to you and I’m not totally misunderstanding.

Smudge

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #66 on: July 28, 2020, 12:23:42 PM »
Hi kajunbee,

Ferrite magnets have been chosen because they will give a field strength of 0.1 Tesla at the water sample.  To establish the field strength that a given magnet will provide you use the known remanent field characteristic of the magnet material (Brem) then create a load line on it.  That load line is related to the demagnetizing factor for the magnet shape.  That only gives you the surface field at the magnet poles, so you need more calculations to determine the field at some distance, and since the magnet poles are not point sources you cannot use the often quoted inverse square law relationship with distance.  This whole process is very complicated so the easiest way to do it is by the use of finite element programs that are available.  For the annular disc magnets we should really use a 3D program, but as I don't have one I used a 2D program called FEMM.  Putting in the magnet dimensions and spacing and the ceramic characteristics this yielded the 0.1 Tesla value.  As to your question, is the magnetic field between two magnets additive, the answer is yes but with qualification.  If two magnets close together have opposing fields then there is the possibility that they can partially demagnetize, in which case you can't then simply subtract the original fields.  This doesn't happen with NdFeB magnets because they are difficult to demagnetize, but force a ferrite magnet close to a NdFeB one and almost certainly the ferrite one will demagnetize or even get reverse magnetized.

Smudge

ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #67 on: July 29, 2020, 03:15:33 PM »
working thru inevitable sorting of unique test protocol to establish procedure [shared with permission of builders]

https://www.overunityresearch.com/index.php?topic=3924.msg83606;topicseen#msg83606

ramset

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ramset

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ramset

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EMJunkie

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #71 on: August 11, 2020, 03:26:27 PM »



It is great to see such wonderful progress Chet! I see you have the best men on the job!

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

   Chris

ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #72 on: August 11, 2020, 05:53:28 PM »
Chris
Yes .. It is a privilege to watch such transparent Open source research on this level ...strangers working together globally.....absolutely wonderful example of what a true open source investigation looks like.


  persons sharing their time .. skills and resources to help humanity.... and hopefully advance the science ...everybody wins regardless ...

and as witness here ...they can ask questions regarding the experiment as well [within reason, since it is a work in progress.

..nothing but gratitude here.


thx  Chet





WhatIsIt

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #73 on: August 11, 2020, 06:25:01 PM »


It is great to see such wonderful progress Chet! I see you have the best men on the job!

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

   Chris

It is also wonderful how transparent Chris thread is.
It is so transparent that I can not see any experiments.
Measurements are out of the question. We must have a faith.

And Chris thread is open source, it is open to all kind of beautiful commercials for his web site.
Wonderful place. I enjoy reading it every time.
Maybe if can add some music to commercials? That would be nice.
We all can learn from Chris.

He also use his best men for the job. Himself.
Probably nobody of his followers does not want to do for him,
they are too much occupied with other marvelous inventions ATM.
They got badges and points for that, which we dont have here.
And if they ever invent something, Chris will sell it so they can continue research,
and maybe Chris can visit Bahamas while members work.
Such a nobel leader.

In years he developed one or two aboveunity device (his words), he is still not sure is it one or two, but he will figure that in time.

Chris is wonderful researcher, transparent and open source orientated.
We should all follow him and obey to everything he asks.

I am so glad that we have such member here.


ramset

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Re: Nuclear Magnetic Resonance (NMR)
« Reply #74 on: August 11, 2020, 08:13:25 PM »
Please only NMR discussions regarding experiment below


 https://www.overunityresearch.com/index.php?topic=3924.msg83849;topicseen#msg83849.

[or start separate topic for other discussions

Thx
Chet