[Cuga] REMINDER!!!Pizza Seminar - Wednesday, January 20, 2010---a message from Hari Areti

[Linda Ceraul]

*_PLEASE NOTE MEETING ROOM CHANGE_*

> "The pain and the joy of polarized solid hydrogen ­ the HDice
> experiments at Jefferson Lab"
>
> Speaker: Andrew Sandorfi
>
> 12 Noon, January 20, 2010
> *Cebaf Center F113*
>
> Please RSVP to harris at jlab.org by
> 5PM on Tuesday, January 19, 2010
>
> Abstract:
> Solid deuterium-hydride, HD, forms a quantum crystal with many unusual
> properties. It provides a pure target in which both H and D can be polarized
> at high fields (15 tesla) and low temperatures (0.01 K). Their spins freeze
> into position with time, so that they can eventually be removed from this
> extreme environment and placed into the center of a detector such as CLAS
> where more conventional fields (~ 1Ž2 tesla) and modest temperatures (~
> 1Ž2 K)
> can maintain their spin orientations for years. The purity, polarization and
> small holding fields of such targets provide large gains for many
> experiments.
> I will describe the physics and the gymnastics of the HDice polarization
> process, and then discuss their application in three diverse experiments.
> Experiment E06-101 will seek to unravel the N* spectrum in a simultaneous
> measurement of all 16 possible polarization observables in Lambda
> photo-production from the neutron. This will provide a direct determination
> of the reaction amplitude (a first in 50 years) and greatly increase the
> sensitivity to the nucleon¹s spectrum. There are expectations that the
> polarization of HD can be maintained with modest electron currents. Pending
> a direct test, experiment E08-021 will measure DVCS with transversely
> polarized HD to access the elusive E Generalized Parton Distribution needed
> to construct a 2+1 dimensional image of the proton. Finally, for something
> completely different, there are plans to use HD and 3He to test polarization
> survival in a plasma. The use of polarized fuel in a Tokamak could
> potentially bring a fusion reactor over the ignition point.
>
>
>
> _______________________________________________
> Cuga mailing list
> Cuga at jlab.org
> https://mailman.jlab.org/mailman/listinfo/cuga
>    
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://mailman.jlab.org/pipermail/cuga/attachments/20100120/2be0ec00/attachment.html