<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Is this a normal FEG or an XFEG? Extraction voltage ? Gun lens ?<div><br></div><div>Best</div><div>Sacha</div><div><br><br><div id="AppleMailSignature"><div>Sent from my mobile device</div><div>-----------------------------</div><div>Sacha De Carlo, Ph.D. </div><div>Business Development EM</div><div><a href="http://Dectris.com">Dectris.com</a></div></div><div><br>On 17 Sep 2018, at 03:00, <a href="mailto:duncan.sousa@rcn.com">duncan.sousa@rcn.com</a> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family:times new roman,new york,times,serif;font-size:12pt;color:#000000"><div>Dear 3DEM,</div><div><br></div><div>I'm working on a Talos and the FEG emission history is highly inconsistent and currently lower than I'd like for single particle data collection on a Falcon II camera. I'm hoping FEI Talos owners would be willing share with me their FEG emission levels. I'd also like to know what dose rate you can achieve under parallel illumination conditions at your preferred data collections: gun lens, spot size, extraction voltage, etc. <br></div><div><br></div><div>The values I'm seeing are ~30-45uA and under parallel conditions it's difficult to achieve better than 10 e-/Ang per second with spot size 3 or greater.<br></div><div><br></div><div>Kind Regards,</div><div>Duncan</div><div><br></div><div><br></div><div>Duncan Sousa, PhD<br> Johns Hopkins University<br> School of Medicine<br> 725 N. Wolfe Street, Hunterian 716<br> Baltimore, MD 21205-2185<br> 1-410-614-1335 </div></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>3dem mailing list</span><br><span><a href="mailto:3dem@ncmir.ucsd.edu">3dem@ncmir.ucsd.edu</a></span><br><span><a href="https://mail.ncmir.ucsd.edu/mailman/listinfo/3dem">https://mail.ncmir.ucsd.edu/mailman/listinfo/3dem</a></span><br></div></blockquote></div></body></html>