<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
</head>
<body>
<div>
<div dir="ltr">There is a special tool you can get from Zeiss to pull the liner tube out from the bottom once you remove the end cap. You can order it directly from Zeiss. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">One thing simple you can try is vacuuming the column from the bottom if you suspect there is a particle flying into the column, which happened occasionally in our case. A good vacuuming could suck it out.</div>
</div>
<div id="ms-outlook-mobile-signature">
<div><br>
</div>
Get <a href="https://aka.ms/o0ukef">Outlook for iOS</a></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Nicki Shaw <nashaw@uwaterloo.ca><br>
<b>Sent:</b> Monday, March 3, 2025 5:08:04 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> [labnetwork] SEM Liner Tube Voltage Issue</font>
<div> </div>
</div>
<style type="text/css" style="display:none">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
</style>
<div dir="ltr">
<table border="0" cellspacing="0" cellpadding="0" width="100%" align="left" style="background:revert!important; border:revert!important; bottom:revert!important; color:revert!important; direction:revert!important; display:revert!important; font-size:revert!important; height:revert!important; letter-spacing:revert!important; line-height:revert!important; margin:revert!important; opacity:revert!important; order:revert!important; outline:revert!important; overflow:revert!important; padding:revert!important; position:revert!important; tab-size:revert!important; table-layout:revert!important; text-align:revert!important; text-indent:revert!important; text-orientation:revert!important; text-overflow:revert!important; text-transform:revert!important; top:revert!important; vertical-align:revert!important; visibility:revert!important; white-space:revert!important; width:revert!important; word-break:revert!important; word-spacing:revert!important; writing-mode:revert!important; zoom:revert!important; border:0!important; display:table!important; width:100%!important; table-layout:fixed!important; border-collapse:seperate!important; float:none!important; border-spacing:0px 0px!important">
<tbody style="background:revert!important; border:revert!important; bottom:revert!important; color:revert!important; direction:revert!important; display:revert!important; font-size:revert!important; height:revert!important; letter-spacing:revert!important; line-height:revert!important; margin:revert!important; opacity:revert!important; order:revert!important; outline:revert!important; overflow:revert!important; padding:revert!important; position:revert!important; tab-size:revert!important; table-layout:revert!important; text-align:revert!important; text-indent:revert!important; text-orientation:revert!important; text-overflow:revert!important; text-transform:revert!important; top:revert!important; vertical-align:revert!important; visibility:revert!important; white-space:revert!important; width:revert!important; word-break:revert!important; word-spacing:revert!important; writing-mode:revert!important; zoom:revert!important; display:block!important">
<tr style="background:revert!important; border:revert!important; bottom:revert!important; color:revert!important; direction:revert!important; display:revert!important; font-size:revert!important; height:revert!important; letter-spacing:revert!important; line-height:revert!important; margin:revert!important; opacity:revert!important; order:revert!important; outline:revert!important; overflow:revert!important; padding:revert!important; position:revert!important; tab-size:revert!important; table-layout:revert!important; text-align:revert!important; text-indent:revert!important; text-orientation:revert!important; text-overflow:revert!important; text-transform:revert!important; top:revert!important; vertical-align:revert!important; visibility:revert!important; white-space:revert!important; width:revert!important; word-break:revert!important; word-spacing:revert!important; writing-mode:revert!important; zoom:revert!important">
<td valign="middle" width="1px" bgcolor="#A6A6A6" cellpadding="7px 2px 7px 2px" style="background:revert!important; border:revert!important; bottom:revert!important; color:revert!important; direction:revert!important; display:revert!important; font-size:revert!important; height:revert!important; letter-spacing:revert!important; line-height:revert!important; margin:revert!important; opacity:revert!important; order:revert!important; outline:revert!important; overflow:revert!important; padding:revert!important; position:revert!important; tab-size:revert!important; table-layout:revert!important; text-align:revert!important; text-indent:revert!important; text-orientation:revert!important; text-overflow:revert!important; text-transform:revert!important; top:revert!important; vertical-align:revert!important; visibility:revert!important; white-space:revert!important; width:revert!important; word-break:revert!important; word-spacing:revert!important; writing-mode:revert!important; zoom:revert!important; padding:7px 2px 7px 2px!important; background-color:#A6A6A6!important; width:0px!important">
</td>
<td valign="middle" width="100%" bgcolor="#EAEAEA" cellpadding="7px 5px 7px 15px" color="#212121" style="background:revert!important; border:revert!important; bottom:revert!important; color:revert!important; direction:revert!important; display:revert!important; font-size:revert!important; height:revert!important; letter-spacing:revert!important; line-height:revert!important; margin:revert!important; opacity:revert!important; order:revert!important; outline:revert!important; overflow:revert!important; padding:revert!important; position:revert!important; tab-size:revert!important; table-layout:revert!important; text-align:revert!important; text-indent:revert!important; text-orientation:revert!important; text-overflow:revert!important; text-transform:revert!important; top:revert!important; vertical-align:revert!important; visibility:revert!important; white-space:revert!important; width:revert!important; word-break:revert!important; word-spacing:revert!important; writing-mode:revert!important; zoom:revert!important; width:100%!important; background-color:#EAEAEA!important; padding:7px 5px 7px 15px!important; font-family:wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif!important; font-size:12px!important; font-weight:normal!important; color:#212121!important; text-align:left!important; word-wrap:break-word!important">
<div style="background:revert!important; border:revert!important; bottom:revert!important; color:revert!important; direction:revert!important; display:revert!important; font-size:revert!important; height:revert!important; letter-spacing:revert!important; line-height:revert!important; margin:revert!important; opacity:revert!important; order:revert!important; outline:revert!important; overflow:revert!important; padding:revert!important; position:revert!important; tab-size:revert!important; table-layout:revert!important; text-align:revert!important; text-indent:revert!important; text-orientation:revert!important; text-overflow:revert!important; text-transform:revert!important; top:revert!important; vertical-align:revert!important; visibility:revert!important; white-space:revert!important; width:revert!important; word-break:revert!important; word-spacing:revert!important; writing-mode:revert!important; zoom:revert!important">
You don't often get email from nashaw@uwaterloo.ca. <a href="https://aka.ms/LearnAboutSenderIdentification" style="background:revert!important; color:revert!important; direction:revert!important; display:revert!important; font-size:revert!important; opacity:revert!important; visibility:revert!important">
Learn why this is important</a> </div>
</td>
<td valign="middle" align="left" width="75px" bgcolor="#EAEAEA" cellpadding="7px 5px 7px 5px" color="#212121" style="background:revert!important; border:revert!important; bottom:revert!important; color:revert!important; direction:revert!important; display:revert!important; font-size:revert!important; height:revert!important; letter-spacing:revert!important; line-height:revert!important; margin:revert!important; opacity:revert!important; order:revert!important; outline:revert!important; overflow:revert!important; padding:revert!important; position:revert!important; tab-size:revert!important; table-layout:revert!important; text-align:revert!important; text-indent:revert!important; text-orientation:revert!important; text-overflow:revert!important; text-transform:revert!important; top:revert!important; vertical-align:revert!important; visibility:revert!important; white-space:revert!important; width:revert!important; word-break:revert!important; word-spacing:revert!important; writing-mode:revert!important; zoom:revert!important; width:75px!important; background-color:#EAEAEA!important; padding:7px 5px 7px 5px!important; font-family:wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif!important; font-size:12px!important; font-weight:normal!important; color:#212121!important; text-align:left!important; word-wrap:break-word!important">
</td>
</tr>
</tbody>
</table>
<div>
<div class="x_elementToProof" style="text-align:left; text-indent:0px; background-color:rgb(255,255,255); margin:1em 0px; font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
Hello,</div>
<div class="x_elementToProof" style="text-align:left; text-indent:0px; background-color:rgb(255,255,255); margin:1em 0px; font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
We are troubleshooting a SEM column issue on our FIB-SEM following a planned power interruption. In short, any advice regarding the disassembly of a
<b>Gemini SEM column </b>or liner tube troubleshooting/maintenance would be greatly appreciated.</div>
<div class="x_elementToProof" style="text-align:left; text-indent:0px; background-color:rgb(255,255,255); margin:1em 0px; font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
The tool in question is a ZEISS Auriga 40, and we have observed the following:</div>
<ul style="text-align:left; background-color:rgb(255,255,255)">
<li style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
<div style="margin:0px">The SEM image is significantly rotated relative to the expected alignment, despite the scan rotation being off.</div>
</li><li style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
<div style="margin:0px">The Inlens detector does not get a signal, but the SESI detector gets a signal with some apertures. The emission view shows that the apertures are significantly misaligned, despite no manual changes being performed.</div>
</li><li style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
<div style="margin:0px">The image rotation improves as SEM voltage is increased, becoming nearly correct at 21 kV—at which point the liner tube shuts off.</div>
</li></ul>
<div class="x_elementToProof" style="text-align:left; text-indent:0px; background-color:rgb(255,255,255); margin:1em 0px; font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
During troubleshooting, we measured the liner tube voltage:</div>
<ul style="text-align:left; background-color:rgb(255,255,255)">
<li style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
When running the liner without connecting it to the column (with a resistor in place to draw current), the voltage ramps normally.</li><li style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
When the liner is connected to the column, the voltage plateaus at 600–700 V instead of reaching the expected 8000 V.</li></ul>
<div class="x_elementToProof" style="text-align:left; text-indent:0px; background-color:rgb(255,255,255); margin:1em 0px; font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
We have checked:</div>
<ul style="text-align:left; background-color:rgb(255,255,255)">
<li style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
The liner tube cable and relay box connections.</li><li style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
The power module and associated lens control boards.</li></ul>
<div class="x_elementToProof" style="text-align:left; text-indent:0px; background-color:rgb(255,255,255); margin:1em 0px; font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
Given these observations, it seems likely that there is a voltage leak inside the column affecting the liner tube voltage. Has anyone encountered a similar issue, or can provide insight into further troubleshooting steps? We are considering opening the column
to check for a short but have not attempted any disassembly other than replacing the filament.</div>
<div class="x_elementToProof" style="text-align:left; text-indent:0px; background-color:rgb(255,255,255); margin:1em 0px; font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
Any advice would be greatly appreciated!</div>
<div class="x_elementToProof" style="text-align:left; text-indent:0px; background-color:rgb(255,255,255); margin:1em 0px; font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:black">
All the best,<br>
Nicki</div>
<div id="x_Signature" class="x_elementToProof">
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
<span style="background-color:rgb(255,255,255)">Senior Facility Microscopist</span></div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
Quantum-Nano Fabrication and Characterization Facility (QNFCF)</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
200 University Ave W | Waterloo, Ontario | N2L 3G1 </div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
Office: QNC 1611</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
P: +1 519-888-4567 ext. 42022</div>
<div style="font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",sans-serif; font-size:15px; color:rgb(33,33,33)">
<span style="background-color:white"><img id="x_imageSelected0" width="180" height="67" data-outlook-trace="F:1|T:1" src="cid:cb186fce-e5ea-43b2-a514-a35479f49e98" style="width:180px; height:67px"></span></div>
</div>
</div>
</div>
</body>
</html>