Tons of links related to NMR
REFERENCE SITES
Hornak Text:
FOURIER TRANSFORMATIONS, ETC
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(The extension converts Java to JavaScript.)
FT process:
DFT explanation
interactive DFT
Convolution:
Visual Explanation of Convolution (1/4 down pg)
* http://www.jhu.edu/~signals/convolve/index.html
Pulses, Spins, etc
90°/180° pulse effect
http://en.wikipedia.org/wiki/File:GWM_HahnEchoDecay.gif
Precession, etc:
http://www.youtube.com/user/overtone1000
(lots of little demos; have your finger on the space bar to pause them as they play.)
Precession applet
HARDWARE
Magnet Innards:
High-Field Magnets
Magnet overview
Annotated cutaway
closer photo
Another overiview (pdf)
a JEOL magnet, layer by layer
YouTube video with some explanation.
step-by-step disassembly
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Close-Up a 60 MHz Electromagnet:
The ESR and its electromagnet
Magnet poles, with sample
Closer view, with sample-holder removed
Probe pix:
coils:
Probe Innards — probe-head
Nested Coils:
two coils and
three coils
MAS (solid) probe:
Solid State probehead and sample holders
etc:
Probe Innards — electronics
Tons of probe-construction photos
Shims:
coils:
Shim coils: shapes and effects
Poole Thesis:
See pp 39–58 of pdf file for lots of graphics.
MRI Shim Coils
Manufacture of MRI shim coils:
See pp 89–93 of pdf file for graphics.
Note that the current in the two halves of each coil flows in opposite directions,
in order to establish a gradient in the appropriate direction (x, y, or z).
discussion/tutorial:
The AcornNMR Shimming Treatise
gradient shimming:
TopShim —
Bruker SpinReport #156 (pdf)
autoshimming:
simplex shimming —
Bruker SpinReport #154 (pdf)
Consoles:
60 MHz Instruments
Console contained analog electronics, controls, and plotter; Electromagnet housed in square box.
Overview
Varian EM-360 console
Varian FT-80 on left; click photo to enlarge.
This is the model I used as an undergrad.
SIMULATION
SILLY STUFF
FT Song (mp3 link at bottom of page),
and the
video
... (be very scared).
YouTube goodies Do not try these at home.
PV=nRT in action ... and
the sequel
PV=nRT #2
or “But Idiocy will find a Way.” Again, do not try this at home.
Don’t be a ding-dong (pdf)
From Keith Brown’s page at the University of Saskatchewan.
The original, less sanitized version has disappeared from the web. :/
Walter Bauer having fun with NMR
Walter Bauer: NMR Music
