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Hi,</div>
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I do not have a problem with my LaB6 filaments that I buy up to one year in advance.</div>
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That way I am always sure to have one on stock in case of an unexpected failure of the current filament.</div>
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I leave it in the vacuum seal, however.</div>
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Cheers</div>
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Marcus</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> 3dem <3dem-bounces@ncmir.ucsd.edu> on behalf of Tsybovsky, Yaroslav (NIH/NCI) [C] <yaroslav.tsybovsky@nih.gov><br>
<b>Sent:</b> Friday, October 15, 2021 4:38 PM<br>
<b>To:</b> Morgan, David Gene <dagmorga@indiana.edu>; 3dem@ncmir.ucsd.edu <3dem@ncmir.ucsd.edu><br>
<b>Subject:</b> Re: [3dem] LaB6 question</font>
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<p class="x_MsoNormal">Hello,</p>
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<p class="x_MsoNormal">Yes, our engineers strongly advise against it. They prefer that we order the filament just before installing it.</p>
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<p class="x_MsoNormal">Yaroslav Tsybovsky, Ph.D. (contractor)</p>
<p class="x_MsoNormal">Senior Scientist & Head</p>
<p class="x_MsoNormal">Vaccine Research Center Electron Microscopy Unit</p>
<p class="x_MsoNormal">Frederick National Laboratory for Cancer Research</p>
<p class="x_MsoNormal" style="text-autospace:none"><span style="color:black">Leidos Biomedical Research, Inc.
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<p class="x_MsoNormal"><b>From:</b> Morgan, David Gene <dagmorga@indiana.edu> <br>
<b>Sent:</b> Friday, October 15, 2021 10:27 AM<br>
<b>To:</b> 3dem@ncmir.ucsd.edu<br>
<b>Subject:</b> [3dem] LaB6 question</p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Hi,</span></p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Does anyone worry about keeping a spare LaB6 filament for several years before using it?</span></p>
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<p class="x_MsoNormal">-- </p>
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<p class="x_MsoNormal"> politics is more difficult than physics.</p>
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<p class="x_MsoNormal"> A. Einstein</p>
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<p class="x_MsoNormal"> David Gene Morgan<br>
Electron Microscopy Center<br>
047E Simon Hall<br>
IU Bloomington<br>
812 856 1457 (office)<br>
812 856 3221 (3200)<br>
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http://iubemcenter.indiana.edu</a></p>
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