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HK: Physik der Hadronen und Kerne

HK 29: Instrumentation und Anwendungen

HK 29.8: Vortrag

Dienstag, 8. März 2005, 15:45–16:00, TU MA042

The Mainz Frozen Spin Target — •Mauricio Martinez — A2 Collaboration. Institut für Kernphysik Mainz

This talk will explain the basics ideas of how a Frozen Spin Target works. The DNP (Dynamical Nuclear Polarization) technique will be shown.

The different parts needed to create a Frozen Spin Target will be presented: A superconducting magnet is used to create a magnetic field of up to 5 Tesla around the target material. The very low temperatures (50 mK) are achieved by a cryostat using He3-He4 mixing. Microwave power is needed to induce the spin flip of the electron and transfer the polarization to the nucleons. An NMR (Nuclear Magnetic Resonance) circuit is used to measure the polarization of the target. The whole system is controlled and monitored using Simatic modules and Step7, ProTool and LabView software.