tag:blogger.com,1999:blog-7102926786939089592.post1496067834294312897..comments2024-03-26T02:28:43.658-07:00Comments on Too Curious For My Own Good: Simple NMR Part 2spencerwhytehttp://www.blogger.com/profile/02277805694134515924noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-7102926786939089592.post-64600121573017400052018-12-30T06:03:28.775-08:002018-12-30T06:03:28.775-08:00Do you performed ome tet and experiments how it wo...Do you performed ome tet and experiments how it works ? Could you direct me to yt or site ?Grauengelhttps://www.blogger.com/profile/01263024838329271210noreply@blogger.comtag:blogger.com,1999:blog-7102926786939089592.post-16280535127413260022017-12-11T08:26:27.318-08:002017-12-11T08:26:27.318-08:00Hello All,
Do you have any idea on a low cost NMR...Hello All,<br /><br />Do you have any idea on a low cost NMR teslameter to be used in Magnetic resonance research? Field strength is 1.5T / 15000 Gauss<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7102926786939089592.post-13540339615450037512014-11-14T06:24:13.707-08:002014-11-14T06:24:13.707-08:00Hi - nice project.
I thought you might be interes...Hi - nice project.<br /><br />I thought you might be interested in this earth's field NMR project I found. Apparently this spectrometer can be constructed for less than $200. It uses an arduino/avr microcontroller setup to do signal generation and provides schematics for the amps and drivers.<br /><br />pdf is free to download at:<br />http://iopscience.iop.org/0957-0233/21/10/105902Andyhttps://www.blogger.com/profile/10307279741308695600noreply@blogger.comtag:blogger.com,1999:blog-7102926786939089592.post-72951549244084422872014-09-02T07:48:58.661-07:002014-09-02T07:48:58.661-07:00Well, not with that simple construction :-) In our...Well, not with that simple construction :-) In our lab we have a machine that can make images of human brain at 270kHz Larmor frequency. <br />I know that Los Alamos has a device that make an image of a human hand at 4 kHz (using SQUID detectors, so not easy to do at home)....<br />I helped design & build a batch of very low cost educational systems for MIT last year (https://gate.nmr.mgh.harvard.edu/wiki/Tabletop_MRI/index.php/Main_Page). This is roughly 8 MHz and makes 100 micrometer resolution images of 10ml samples....<br />I'll be curious what you'll be getting from your device....twitzelhttps://www.blogger.com/profile/17525409315085476054noreply@blogger.comtag:blogger.com,1999:blog-7102926786939089592.post-85901222586365649602014-09-01T18:34:41.538-07:002014-09-01T18:34:41.538-07:00Thanks for the input, and you are totally right, I...Thanks for the input, and you are totally right, I meant to say pre-polarizing coil! I am using a 500 mL volume in the current version, and I am looking into getting a cylindrical piece of metal to use for shielding.<br /><br />Have you seen any other projects along these lines that have been successful?spencerwhytehttps://www.blogger.com/profile/02277805694134515924noreply@blogger.comtag:blogger.com,1999:blog-7102926786939089592.post-83704850807288102282014-09-01T18:18:34.652-07:002014-09-01T18:18:34.652-07:00Hi !
Congrats on choosing this project !! I'm ...Hi !<br />Congrats on choosing this project !! I'm always excited to see something like this. Just a couple of comments. 8 mL might not be too small of a sample if the TR coil is tightly wound around it. It will all come down to the performance of your receiver preamp. You will definitely want shielding, use copper foil or if thats to expensive then use BBQ foil....<br />In your design the polarization coil can only be used as prepolarization (since TR coil and polarization coil are parallel in orientation), which is harder to accomplish than a constant polarization field because the turn-off transient will disturb your magnetization unless you turn the polarization coil off very carefully...twitzelhttps://www.blogger.com/profile/17525409315085476054noreply@blogger.com