- #1
_maxim_
- 105
- 6
Dear all,
here's my first request for a little help (maybe also in finding the proper subforum...)
I'm working as developer and scientific consultant in a lab for Nuclear Magnetic Resonance at high field (> 21 Tesla), and I have to create a suitable probe for checking the stability of a wide-bore cryomagnet.
This will be done by a simple RF detecting circuit which pilots a coil, and the coil is wound around a micro boll containing a deuterated solvent (D2O, CDCl3, DMSO-d6 and so on). The RF circuit is already operative and capable to read out the very tiny signal which arises from deuterium inside the strong magnetic field ( as a quick reference, see http://www.cis.rit.edu/htbooks/nmr/chap-7/chap-7.htm#7.1" ).
Now, about my request.
I need to substitute the plastic micro boll with a soldered glass micro capsule, containing one of the deuterated solvent (i.e. Acetone-d6).
The main problem is to have a regular cylinder in glass, with max external dimensions L x D= 8.2 x 4.6 mm (Length x Diameter), fully filled with the liquid, and with its bases hermetically sealed.
Started cutting a NMR sample tube, I have no any laser precision device in my lab, hence the quality of the cutting is very poor. The subsequent problem is solder the glass with highly flammable solvents (i.e. acetone), but the risk could be reduced using cryogenic liquids (i.e. liquid nitrogen).
Do you have any idea for realizing this glass capsule?
Any idea would be greatly appreciated
All best
Max
here's my first request for a little help (maybe also in finding the proper subforum...)
I'm working as developer and scientific consultant in a lab for Nuclear Magnetic Resonance at high field (> 21 Tesla), and I have to create a suitable probe for checking the stability of a wide-bore cryomagnet.
This will be done by a simple RF detecting circuit which pilots a coil, and the coil is wound around a micro boll containing a deuterated solvent (D2O, CDCl3, DMSO-d6 and so on). The RF circuit is already operative and capable to read out the very tiny signal which arises from deuterium inside the strong magnetic field ( as a quick reference, see http://www.cis.rit.edu/htbooks/nmr/chap-7/chap-7.htm#7.1" ).
Now, about my request.
I need to substitute the plastic micro boll with a soldered glass micro capsule, containing one of the deuterated solvent (i.e. Acetone-d6).
The main problem is to have a regular cylinder in glass, with max external dimensions L x D= 8.2 x 4.6 mm (Length x Diameter), fully filled with the liquid, and with its bases hermetically sealed.
Started cutting a NMR sample tube, I have no any laser precision device in my lab, hence the quality of the cutting is very poor. The subsequent problem is solder the glass with highly flammable solvents (i.e. acetone), but the risk could be reduced using cryogenic liquids (i.e. liquid nitrogen).
Do you have any idea for realizing this glass capsule?
Any idea would be greatly appreciated
All best
Max
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