Darmstadt 2008 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Instrumentation und Anwendungen I
HK 18.5: Vortrag
Dienstag, 11. März 2008, 09:45–10:00, 2C
Polarized 3He targets at MAMI — •Jochen Krimmer1, Werner Heil1, and Patricia Aguar-Bartolomé2 for the A1 collaboration — 1Institut für Physik, Universität Mainz — 2Institut für Kernphysik, Universität Mainz
A polarized 3He target has been used for the first double polarized
experiments with the new acceleration stage MAMI-C in Mainz.
Highly polarized 3He gas is provided by a polarizer which is based on the
method of metastability exchange optical pumping.
After filling, the target cells were brought to the
experimental area, where inside a mu-metal box a homogeneous holding field
is provided. The spin of the 3He nuclei can be rotated in all directions
by adiabatic rotation of the magnetic guiding field. An online
monitoring of the relative and absolute polarization is possible via NMR and
AFP methods, respectively.
In this talk the complete setup will be described as well as its performance
under electron beam conditions.
Furthermore, the status of the developments for a polarized 3He target
at the tagged photon beam of MAMI will be given.