Vortex meeting - December 19, 2016

We'll meet Monday Dec. 19 @ 4pm EST locally in TL-2236.

Agenda

Status updates

Field emission PES

Field Emission of Spin-Polarized Electrons Extracted from Photoexcited GaAs Tip media:Kuwahara_2006.pdf

Demonstrated photo-assisted field emission (circular polarization above band-gap) from p- and n- type bulk (100) GaAs

With applied field 2-3 MV/m produce QE~0.01% and polarization 30-40%

Melting of tip suggests <20nA, which is OK for low energy Mott scattering

Estimated effective emission radius=5nm and angle=10mrad, implying a brightness of about 1E7 A /cm2/sr

Field Emission of Monoenergetic Spin-Polarized Electrons media:Baum_1977.pdf

Path forward

Blue Jeans and Wiki

Toll Free Phone number: 1-888-240-2560
Int'l Call Phone numbers: http://bluejeans.com/numbers
Meeting ID: 734055407#
Web connection for desktop sharing: https://bluejeans.com/734055407
Wiki : https://wiki.jlab.org/ciswiki/index.php/Vortex_meeting_-_December_19,_2016