Date: Fri Oct 31 09:42:45 2008 Back to Contents

Author: Zani, Gerald

Subject: Re: Liquid helium experiments

Post:

Here is the correct link:

http://tinyurl.com/5fcrw2

- JZ

-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
Behalf Of Zani, Gerald
Sent: Friday, October 31, 2008 9:19 AM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Liquid helium experiments

Robert,

We use SFH to demonstrate the Lambda point, the creep effect and the
fountain effect:

http://www.physics.brown.edu/physics/demopages/Demo/modern/demo/7a7050.h
tm

And also in the Advanced Labs they use SFH and an evaporator to do
tunneling with lead - Chromium junctions:

http://tinyurl.com/5k6dqn


If I get time I will try to get you some of the useful details. - JZ


-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
Behalf Of Robert DeSerio
Sent: Friday, October 31, 2008 8:57 AM
To: Advanced Labs; tap-l@lists.ncsu.edu
Cc: Neil Sullivan; Arthur F. Hebard; Tarek Saab
Subject: [tap-l] Liquid helium experiments

We are about to start designing a liquid helium cryostat for our
advanced lab course
and I was wondering if any of you have experience using one with your
lab courses.
In broad strokes, I'd love to hear what experiments you do, what kind of

data do they
produce, and what does the data analysis entail. We will be
recirculating the helium back to
our liquefier in the building's basement and one of our low temp
researchers is leading the
effort, so I expect many construction details will be done correctly.
However, any advice
(or stories) on cryostat or experiment construction or safety issues ---

particularly, but not limited
to, those associated with use by inexperienced users --- would also be
appreciated. Any
references or websites on experiments or cryostats geared toward
undergraduate use would
also be appreciated.

Regards,
Bob

Robert DeSerio
Department of Physics
University of Florida
P.O. Box 118440
Gainesville, FL 32611-8440

Phone: 352 392-1690 (office)
352 392-0524 (fax)
Email: deserio@phys.ufl.edu
Web: http://www.phys.ufl.edu/~deserio




From tap-l-owner@lists.ncsu.edu Fri Oct 31 09:42:45 2008

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