Overhauser Mag Information

[Infamy]

A friend of mine is working on building a Overhauser Mag. Has anyone on here ever built one of these, and is there any freely available info about with schematics etc.?

[msolc]

overhauser mag

A tough thing to do...signalls levels are much higher then PPM, will need only a fiew hundered mW of pumping RF at cca 60 MHz, but big problem is free radical needed in NMR liquid, hard to get and chemically unstable, will decay in a fiew days...only GEM systems developed such radical that will last several years (as far as I know)...
ms

[Infamy]

I think the sensors are going to be sourced in Russia, that overcomes the free radical problem.

[msolc]

In that case

I am more than hot about getting such a sensor to build Overhouser...Can you please give us more information where toget it? Electronics will not be such a problem...

[Infamy]

I guess this must be the place. I will check to see if this is correct.

'The Laboratory of Quantum Magnetometry of Ural State Technical University (USTU-UPI) is the only designer of Overhauser sensor in Russia.'


www.dpt.ustu.ru/labqmag/research.htm

http://magnetometer.ur.ru/content/bl...n/0/9/lang,en/

[Atul Asthana]

Is there no patent on the free radical fluid, from which we could learn?
or are chem labs across the world not capable of producing such liquid?

[Altra]

A friend of mine was working on one a few years ago. He found a free radical solution from Fisher Scientific. The RU site above had more details before. There were pictures of the sensors and other details. The sensors were about the size of a aluminum cola can. I have some notes which I will look for, in the mean time here is a good patent to start with.

Mark

[Altra]

I found this article which uses "Tempone". I believe that is what my friend was going to use. The same paper mentions using the "ppm" platform with RF circuits added. Which means you can use a proton mag as your base.

Mark

[Hubert Dong]

sensor compound of overhauser mag.

Hi,
I want to know the compound of sensors of overhauser mag. , and its concentration?

[Atul Asthana]

Thanks for the paper/patent.
Let me see what I can make out from these two.

[Atul Asthana]

Here are more details :
http://www.springerlink.com/content/u82861758605k628/
http://pubs.acs.org/doi/abs/10.1021/jp036020f
http://www.epr-center.du.edu/Relaxation_ACERT.ppt

[Hubert Dong]

I am very interesting in OVH mag.. Please help each other, more communicating.

[Altra]

Mr. Dong,

Maybe you could communicate what you know about the overhauser mag? So we can all share the information. Thanks

[Hubert Dong]

Mr. Altra,
First, the sensor's compound? and its concentration?
Second, what frequency and power of RF? its relationship with sensor's compound?

Regards,

[Boattow]

More info?

Hi,
Is there any detailed technical descriptions on the Overhauser mag? Principle of operation, schematics, etc?
Thanks,
BT