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<DIV style="FONT-STYLE: normal; FONT-FAMILY: Helvetica,Arial,sans-serif; COLOR: #000; FONT-SIZE: 12pt; FONT-WEIGHT: normal; TEXT-DECORATION: none"><B>From: </B>"Audrey Nichols" <anichols@jlab.org><BR><B>To: </B>"acc staff" <acc_staff@jlab.org>, "FEL Staff" <fel-staff@jlab.org><BR><B>Sent: </B>Monday, November 18, 2013 4:55:08 PM<BR><B>Subject: </B>[Accelerator_staff] Accelerator Seminar: Amy Sy - 11/22/13<BR><BR>
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<DIV style="FONT-FAMILY: tahoma,new york,times,serif; COLOR: #000000; FONT-SIZE: 12pt">ACCELERATOR SEMINAR<BR><BR>"Advanced Penning-type Ion Source Development and Passive Beam Focusing Techniques for an Associated Particle Imaging Neutron Generator with Enhanced Spatial Resolution"<BR><BR>Amy Sy<BR><BR>
<P style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; MARGIN-TOP: 0pt; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; VERTICAL-ALIGN: baseline; language: en-US"><SPAN style="FONT-FAMILY: Arial; COLOR: black; FONT-SIZE: 13pt; language: en-US; mso-ascii-font-family: Arial; mso-bidi-font-family: Arial; mso-fareast-theme-font: minor-fareast; mso-color-index: 1; mso-font-kerning: 12.0pt; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%">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.</SPAN></P><BR>Friday, November 22, 2013<BR>11:00 a.m.<BR>CEBAF Center, Room F326/327<BR><BR><BR><BR>
<DIV><SPAN></SPAN>------<BR><B><FONT size=2>Audrey N. Barron</FONT></B><BR><FONT size=2>Administrative Assistant</FONT><BR><FONT size=2>Center for Advanced Studies of Accelerators</FONT><BR><FONT size=2>Jefferson Lab</FONT><BR><FONT size=2>757-269-7327</FONT><BR><FONT size=2><A>anichols@jlab.org</A></FONT> / <FONT size=2><A href="http://www.jlab.org/" target=_blank>www.jlab.org</A></FONT><BR><BR><IMG style="BORDER-BOTTOM: 0px; BORDER-LEFT: 0px; BORDER-TOP: 0px; BORDER-RIGHT: 0px" src="cid:30d3ce0628e5808544c1298035fc8d2f3cda920b@zimbra"><BR><SPAN></SPAN><BR></DIV></DIV><BR>_______________________________________________<BR>Accelerator_staff mailing list<BR>Accelerator_staff@jlab.org<BR>https://mailman.jlab.org/mailman/listinfo/accelerator_staff</DIV><BR></div></body></html>