[Eng-div] Fwd: [Accelerator_staff] Accelerator Seminar: Amy Sy - 11/22/13

[Gayle Sundeen]

----- Forwarded Message -----

From: "Audrey Nichols" <anichols at jlab.org> 
To: "acc staff" <acc_staff at jlab.org>, "FEL Staff" <fel-staff at jlab.org> 
Sent: Monday, November 18, 2013 4:55:08 PM 
Subject: [Accelerator_staff] Accelerator Seminar:  Amy Sy - 11/22/13 


ACCELERATOR SEMINAR 

"Advanced Penning-type Ion Source Development and Passive Beam Focusing Techniques for an Associated Particle Imaging Neutron Generator with Enhanced Spatial Resolution" 

Amy Sy 


The use of accelerator-based neutron generators for non-destructive imaging and analysis in commercial and security applications is continuously under development, with improvements to available systems and combinations of available techniques revealing new capabilities for real-time elemental and isotopic analysis. The recent application of associated particle imaging (API) techniques for time- and directionally-tagged neutrons to induced fission and transmission imaging methods demonstrates such capabilities and greatly benefits from improvements to existing neutron generator systems. Increased neutron yields and improved spatial resolution can enhance the capabilities of imaging methods utilizing the API technique. The work presented in this talk focuses on the development of components for use within an API neutron generator with enhanced system spatial resolution. The major focus areas were the ion source development for plasma generation, and passive ion beam focusing techniques for the small ion beam widths necessary for enhanced spatial resolution. The ion source development focused on exploring methods for improvement of Penning-type ion sources that are used in conventional API neutron generator systems, with strategic combinations of these improvement schemes resulting in a factor of 20 improvement in the extracted ion current density over the baseline source performance. The passive beam focusing technique known as ion guiding was explored, with neutron yield measurements indicating the stable transmission of deuterium ion currents that are several orders of magnitude higher than the currents typically utilized in similar experiments. These results warrant further investigation into the viability of these components for neutron generator applications. 
Friday, November 22, 2013 
11:00 a.m. 
CEBAF Center, Room F326/327 




------ 
Audrey N. Barron 
Administrative Assistant 
Center for Advanced Studies of Accelerators 
Jefferson Lab 
757-269-7327 
anichols at jlab.org / www.jlab.org 




_______________________________________________ 
Accelerator_staff mailing list 
Accelerator_staff at jlab.org 
https://mailman.jlab.org/mailman/listinfo/accelerator_staff 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://mailman.jlab.org/pipermail/eng-div/attachments/20131118/772ed516/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: JLabEmailSig.png
Type: image/png
Size: 2227 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/eng-div/attachments/20131118/772ed516/attachment.png