Difference between revisions of "Vortex meeting - December 14, 2016"

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  Web connection for desktop sharing: https://bluejeans.com/528061628
 
  Web connection for desktop sharing: https://bluejeans.com/528061628
  
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=== Agenda ===
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=== Background ===
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;Summary of a few avenues of research to generate OAM beams at Jefferson Lab
+
;2014
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:Generation of electron vortex beams
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:Dipangkar Dutta, Ben McMorran OU and Joe Grames JLAB began conversation to consider feasibility of OAM beam at JLAB
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::unpolarized electrons by field emission to produce OAM electrons for acceleration e.g. Ben's work at Oregon
 
−
::spin polarized electrons from photoemission or photo-assisted field emission to produce spin polarized OAM electrons for acceleration
 
−
:Generation of photon vortex beams
 
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::inverse Compton scattering of OAM laser from e- beam @ ~MeV energy (OAM x-ray) or ~GeV => test at CEBAF/LERF (~MeV) or CEBAF C-Compton? (~GeV)
 
−
::non-linear inverse Compton scattering
 
  
 +
;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
 +
 +
=== Slides ===
 
; Yoshitaka's Slides - [[media:Meeting_VortexBeams_20161214.pdf]]
 
; Yoshitaka's Slides - [[media:Meeting_VortexBeams_20161214.pdf]]

Revision as of 13:25, 14 December 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, Ben McMorran OU 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

Slides

Yoshitaka's Slides - media:Meeting_VortexBeams_20161214.pdf
Retrieved from "https://wiki.jlab.org/ciswiki/index.php?title=Vortex_meeting_-_December_14,_2016&oldid=11430"