Date: Thu, 14 Apr 2011 07:35:43

Author: David Ward

Subject: Re: magnetic torque apparatus

Post:

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Jerry-

Thank you! This is very helpful.

david

From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On Beh=
alf Of Zani, Gerald
Sent: Thursday, April 14, 2011 6:42 AM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] magnetic torque apparatus

David,

I have the Teachspin Earth Field NMR with the Field Coils and the Magnetic =
Torque apparatus. They are excellent. I highly recommend them both. They =
are, along with Superfluid Helium, the top demonstrations in our advanced u=
ndergraduate and graduate courses on Quantum Mechanics.

I have no experience with the TerraNova Magritek system. It appears to be =
a completely different animal than the Teachspin.

The principles for the Teachspin devices are elegant and simple, perfect as=
an intro teaching apparatus and they're really a joy for the students to s=
ee and especially to hear the T2 time in the audio frequency. But it is not=
accurate to call it an NMR device. That is a misnomer. It should really b=
e renamed "Nuclear Spin Precession in a Weak Magnetic Field" because it doe=
s not utilize either the high frequency resonance methods nor the strong ma=
gnetic fields in the manner typically assumed to be associated with the pri=
nciple and operation of medical NMR systems of today.

If your thinking seriously about the Teachspin device I recommend that you =
also get the Field Coils. They help to tune the device to get long T2 time=
s, on the order of two seconds! Which is amazing.

Let me know if you have more questions.

- Jerry Z.
On Wed, Apr 13, 2011 at 12:37 PM, David Ward > wrote:
Dear Tap-L Folks:

Do any of y'all have experience and would comment on the various student la=
b type
earth-field NMR systems, particularly the TeachSpin (http://www.teachspin.c=
om/instruments/magnetic_torque/index.shtml)
and TerraNova (magritek) systems. Also, TeachSpin publishes their prices, b=
ut Magritek makes you request
a quote: anybody have a price range for TerraNova?

Thanks!

david



--
Gerald Zani
Demonstration Manager
Physics
Brown University
(401) 863-3964

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Jerry- =
Thank you! This is very helpful. david From: tap-l-owner@lists=
.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On Behalf Of Zani, Ger=
aldSent: Thursday, April 14, 2011 6:42 AMTo: tap-l@li=
sts.ncsu.eduSubject: Re: [tap-l] magnetic torque apparatus<=
/o:p> David,I have the Teachspin=
Earth Field NMR with the Field Coils and the Magnetic Torque apparatus. Th=
ey are excellent. I highly recommend them both. They are, along=
with Superfluid Helium, the top demonstrations in our advanced undergradua=
te and graduate courses on Quantum Mechanics.I have no experience w=
ith the TerraNova Magritek system. It appears to be a completely diff=
erent animal than the Teachspin.The principles for the Teachspin de=
vices are elegant and simple, perfect as an intro teaching apparatus and th=
ey're really a joy for the students to see and especially to hear the T2 ti=
me in the audio frequency. But it is not accurate to call it an NMR device.=
That is a misnomer. It should really be renamed "Nuclear Spin P=
recession in a Weak Magnetic Field" because it does not utilize either=
the high frequency resonance methods nor the strong magnetic fields in the=
manner typically assumed to be associated with the principle and operation=
of medical NMR systems of today.If your thinking seriously about t=
he Teachspin device I recommend that you also get the Field Coils. Th=
ey help to tune the device to get long T2 times, on the order of two second=
s! Which is amazing.Let me know if you have more questions.- Jerry Z.On Wed, Apr 13, 20=
11 at 12:37 PM, David Ward > wrote:Dear Tap-L Folks: Do any of y'all hav=
e experience and would comment on the various student lab type =
earth-field NMR systems, particularly the TeachSpin (http://www.teachspin.com/instruments/magnetic_torque/index.sht=
ml)and TerraNova (magritek) systems. Also, T=
eachSpin publishes their prices, but Magritek makes you request a quote: anybody have a price range for TerraNova? Thanks! david-- Ger=
ald ZaniDemonstration ManagerPhysicsBrown University(401) 8=
63-3964=

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