The 2015 International Workshop on Polarized Sources, Targets & Polarimetry

Session

Session 12

17 Sept 2015, 14:00

VZ 04 Saal 1 (RUB)

Conveners

Session 12

• Ben van den Brandt (Paul Scherrer Institute, 5232 Villigen, Switzerland)

9. Begrüßung

Werner Peter Meyer (Institut fuer Experimentalphysik I)

17/09/2015, 14:00

Polarized Targets

57. The principles of dynamic nuclear polarisation with strong microwave fields. From the solid effect to NOVEL and ISE

Prof. Tom Wenckebach (Paul Scherrer Institute, CH-5232 Villigen)

17/09/2015, 14:15

Talk

Dynamic Nuclear Polarization (DNP) uses microwave power to transfer the -- high -- polarization of electron spins to nuclear spins. To speed up this transfer, it is often attractive to increase the microwave power, i.e., increase the strength of the microwave field. This talk discusses how one passes through different regimes when doing so. At low power the solid effect and thermal mixing...

56. Dynamic Nuclear Polarization using short-lived photo-excited triplet states: experiments and applications

Dr Patrick Hautle (Paul Scherrer Institute, CH-5232 Villigen)

17/09/2015, 14:45

Talk

In DNP experiments the high polarization of an electronic spin system is transferred by suitable microwave irradiation to the nuclear spin system. In usual classical schemes ground state paramagnetic centers are introduced into the sample as dopants and their electron spin polarization is determined thermally. This requires temperatures of 1K or lower and a magnetic field of several Tesla. As...