Vortex meeting - December 14, 2016

Invitation

Based on your feedback we will meet this Wednesday Dec. 14th at 4pm EDT. We'll meet locally in CEBAF Center F-Wing Rm. 224-225 and by phone/video conference call using BlueJeans (info below). Since the purpose of this meeting is to discuss an upcoming NSF funding opportunity I'd like to take a few minutes at the beginning to set the stage. However, since we haven't met in awhile and there are some new faces joining it would be nice to then go "around the room" to take a few minutes and share recent activities or interest. Afterwards, we can return to discussing how we may consider to organize our OAM interests, and see if some can be refined for a proposal.

Blue Jeans and Wiki

Toll Free Phone number: 1-888-240-2560
Int'l Call Phone numbers: http://bluejeans.com/numbers
Meeting ID: 528061628#
Web connection for desktop sharing: https://bluejeans.com/528061628

Background

2014

Dipangkar Dutta MSU, Ben McMorran UO and Joe Grames JLAB began conversation to consider feasibility of OAM beam at JLAB

2015

Ben invited to JLAB for seminar and discussion on OAM collaboration

Yoshitaka introduced himself at IPAC'15 discussed collaborating to produce gamma OAM

Developed an R&D plan to develop e- OAM source and test with Mott scattering (100-300keV), and if successful test acceleration of OAM e- OAM e- beam from source and source and test by Mott scattering at ~300keV

Motivation high energy vortex electrons for deep-inelastic and semi-inclusive deep-inelastic scattering with a proton target

2016

Submitted NSF Research Opportunities in Accelerator Stewardship for producing and accelerating electron OAM to ~300keV for Mott experiment.

Yoshitaka arrived April for two year stay at JLAB interested to produce OAM gamma rays

Dipangkar's student visited UO for summer

Dave Gaskell (Compton polarimeter) and Shukui Zhang (laser) joined working group

Making connections with broader group of people (Geoff Krafft JLAB/ODU, Andrei Afanasev GWU, Carl Carlson W&M)

Yoshitaka developing case for OAM gamma experiment at JLAB (OAM laser @ LERF, simulating w/ Italian group), sharing idea to Theory & Accelerator groups

Andrew Hutton JLAB Acc. Div. head discussing with JLab Theory head and ODU physics dept. chair to motivate/support NSF proposal for OAM gamma exp't

• Views OAM gamma experiment as most direct path for physics motivation
• It is something NSF may own without conflict for DOE
• Provides a pathway to explore vortex e- beam without directly proposing a new e- source
• Leverages towards time Yoshitaka is at JLAB

2017

Next NSF FOA is due Feb. 1

• Physics motivation
• Proposed experiment
• Simulation motivation (parameter values)
• OAM laser (OAM generation, stored power)
• Gamma/OAM detection
• Electron vortex R&D

Slides

Yoshitaka's Slides - media:Meeting_VortexBeams_20161214.pdf