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<div class="moz-cite-prefix">I have a very large hoard of spare ISI
supplies including filaments. Doesn't matter though if I can't
pull a good vacuum first<br>
<br>
On 12/15/2014 06:54 PM, Jeff Miller wrote:<br>
</div>
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cite="mid:1922602109.620324.1418698476362.JavaMail.yahoo@jws10698.mail.bf1.yahoo.com"
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<div dir="ltr" id="yui_3_16_0_1_1418691070495_62709"><span
id="yui_3_16_0_1_1418691070495_62725">BTW I saw your blog,
sounds like you need a new filament. They burn out every 25
hours or so. I hope you got the filament holder/whenelt.
They are consumables but $$ and frequently pirated. I think
most for ISI are the same, I have a few in fair condition I
might sell one.</span></div>
<div id="yui_3_16_0_1_1418691070495_63184" dir="ltr"><br>
<span id="yui_3_16_0_1_1418691070495_62725"></span></div>
<div id="yui_3_16_0_1_1418691070495_63186" dir="ltr"><span
id="yui_3_16_0_1_1418691070495_62725">-Jeff</span></div>
<br>
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<hr size="1"> <font id="yui_3_16_0_1_1418691070495_62870"
face="Arial" size="2"> <b><span
style="font-weight:bold;">From:</span></b> John
McMaster <a class="moz-txt-link-rfc2396E" href="mailto:johndmcmaster@gmail.com"><johndmcmaster@gmail.com></a><br>
<b><span style="font-weight: bold;">To:</span></b> Jeff
Miller <a class="moz-txt-link-rfc2396E" href="mailto:mysterylectricity@yahoo.com"><mysterylectricity@yahoo.com></a>; Chris Murphy
<a class="moz-txt-link-rfc2396E" href="mailto:chrisnoisebridge@gmail.com"><chrisnoisebridge@gmail.com></a> <br>
<b><span style="font-weight: bold;">Cc:</span></b>
<a class="moz-txt-link-rfc2396E" href="mailto:sem@lists.noisebridge.net">"sem@lists.noisebridge.net"</a>
<a class="moz-txt-link-rfc2396E" href="mailto:sem@lists.noisebridge.net"><sem@lists.noisebridge.net></a> <br>
<b><span style="font-weight: bold;">Sent:</span></b>
Friday, December 12, 2014 7:09 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
Re: All in on the mini-SEM?<br>
</font> </div>
<div class="y_msg_container"><br>
<div id="yiv5747781064">
<div>
<div class="yiv5747781064moz-cite-prefix">Heyo,<br
clear="none">
I haven't followed the noisebridge unit, but some
updates on my side if anyone is curious.<br
clear="none">
<br clear="none">
I traced the vacuum leak to the column in my Super
IIIA. I'm having trouble safely taking apart the
column to troubleshoot further.<br clear="none">
<br clear="none">
Over the previous weekend I picked up a small ISI
SEM similar to the noisebridge unit ($500 + drive to
LA and back). Some details on it here: <a
moz-do-not-send="true" rel="nofollow" shape="rect"
class="yiv5747781064moz-txt-link-freetext"
target="_blank"
href="http://uvicrec.blogspot.com/2014/12/theyre-multiplying.html">http://uvicrec.blogspot.com/2014/12/theyre-multiplying.html</a><br
clear="none">
<br clear="none">
The guy also threw in a carbon coater.<br
clear="none">
<br clear="none">
Anyway, it has a broken PMT and needs a small vacuum
adapter that should have come in the mail today.
PMT has unknown ETA but I could steal a spare off of
the Super IIIA if I wanted to test sooner.<br
clear="none">
<br clear="none">
I also have a *huge* (over 100 lbs) pile of ISI
documents (schematics, mechanical drawings, service
notes, etc) I've been scanning in that one of their
retired lead techs gave me. Maybe this weekend I'll
finish the digitaization process and begin
uploading/organizing them.<br clear="none">
<br clear="none">
I have a small Pfeiffer/Balzers turbo pump system I
assembled off of eBay for under $500. It was chosen
specifically because parts for this particular
system are readily available to piece together. Of
course, it would be hit or miss if the bearings are
sub-optimal but I imagine often times they will be
good enough for hobbyist use. I'd suggest others
looking into the same route before dropping 1k on a
restore kit. I haven't decided if I'm going to
attach it to the SEM once it works better.<br
clear="none">
<br clear="none">
I get class 10k using a high power Honeywell HEPA
filter in my bedroom. Very cheap and easy to setup.<br
clear="none">
<br clear="none">
John<br clear="none">
<br clear="none">
On 12/12/2014 05:56 PM, Jeff Miller wrote:<br
clear="none">
</div>
<div class="qtdSeparateBR"><br>
<br>
</div>
<div class="yiv5747781064yqt9895894788"
id="yiv5747781064yqt00489">
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:HelveticaNeue,
Helvetica Neue, Helvetica, Arial, Lucida Grande,
sans-serif;font-size:10px;">
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_19032">I
think we should give the mini-sem project a
second chance. <br clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_19510"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_19511">I've
been thinking about what the SEM experience at
NB drove home.</div>
<div
id="yiv5747781064yui_3_16_0_1_1418428069474_19126"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_19127">We
should think small and practical. <br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_19513"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_19514">Rather
than a clean room, let's think glovebox. Small
glovebox, easy enough to fab.<br clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_25951"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_25952">The
manual vacuum controls have to go. It should
all be electric valves, interlocked and goof
proof.</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_25953"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_25954">The
coater should be integrated, and interlocked
with the SEM to use the same pump(s). <br
clear="none">
Perhaps a small, low temp vacuum oven for
drying bugs and plant samples, too.<br
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</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_28674"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_28675">The
console has to more or less go. We have to
commit to the digital platform I developed, or
develop a new one. </div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_39479"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_39480">Ideally,
the diff pump and forepump should be
replaced.with a turbo and a diaphragm pump.
With that we get instant on, no exhaust fumes.
and no periodic cleaning of the column parts.</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_44946"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_42482">Alcatel
makes a high speed molecular drag pump. I may
be wrong, but I don't think it has stator
blades. So I think you can up-to-air it at
full speed with no damage, and it may be able
to choke down a grain of sand or two without
exploding. It will be mounted upside down of
course. <br clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_43639"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_43638">The
vacuum isn't as deep as theoretical for a
turbo or diff pump, but is more than
sufficient for a SEM and coater. <br
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</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_50497"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_50498">I
have a bunch of these pumps. So many in fact
that I'm thinking of coughing up the $1,000
for the factory toolkit (probably a bearing
puller and two precision bore steel plates, if
that) to rebuild them. I think the bearings
alone go for $300, but it shouldn't be hard to
find a pump with bad bearings</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_53761">for
~$250. The pumps have a very high foreline
pressure tolerance, 30 torr I think: I've seen
them backed with run-of-the-mill two stage
diaphragm pumps from Gast. Meanwhile, high
performance four stage diaphragm pumps seem to
be fetching less than half of what I was
getting for <br clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_65013">them
5 years ago, $150 might buy a working pump and
$200 more might effectively rebuild it. <br
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</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_57288"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_59126">As
it turns out, I've already done some of the
heavy lifting. It's probably been close to ten
years now since I first wanted to make the
mini-sem portable, to bring to classrooms. To
that end I had custom pieces milled that
attach to the top and bottom vacuum ports, and
convert them to the KF standard. Short lengths
of stainless bellow also show up cheap enough
these days.</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_67112"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_69228">Perhaps
as much as anything, it would highlight vacuum
technology as well as the SEM itself. <br
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</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_69229"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_69234">I
might have almost everything we need on hand.
I can see lending the core components for
proof of <br clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_88474">concept
, or until they can be found serendipitously
on ebay.. <br clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_108767"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_108768">For
all the little pieces and parts, $200-$300
might be a good guess and represent a good
working minimum budget for retrofitting the
valves and <br clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_116695">piping.
If we have to do it from scratch, the glovebox
could be another $150 or so but further down
the line. <br clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_98537"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_130752">I
say pitch it as far more user friendly and
less invasive, and see if we can get funds
allocated. </div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_139660"><br
clear="none">
</div>
<div dir="ltr"
id="yiv5747781064yui_3_16_0_1_1418428069474_139661">Anyone
care any more? How are you guys coming along
with your SEMS, coaters, and turbos? <br
clear="none">
</div>
<div dir="ltr"><br clear="none">
</div>
<div dir="ltr">-Jeff</div>
<div dir="ltr"><br clear="none">
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id="yiv5747781064yui_3_16_0_1_1418428069474_25391"
style="font-family:HelveticaNeue, Helvetica
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<div
id="yiv5747781064yui_3_16_0_1_1418428069474_25390"
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id="yiv5747781064yui_3_16_0_1_1418428069474_25389">
<hr size="1"> <font
id="yiv5747781064yui_3_16_0_1_1418428069474_25392"
face="Arial" size="2"> <b><span
style="font-weight:bold;">From:</span></b>
Chris Murphy <a moz-do-not-send="true"
rel="nofollow" shape="rect"
class="yiv5747781064moz-txt-link-rfc2396E"
ymailto="mailto:chrisnoisebridge@gmail.com" target="_blank"
href="mailto:chrisnoisebridge@gmail.com"><chrisnoisebridge@gmail.com></a><br
clear="none">
<b><span style="font-weight:bold;">To:</span></b>
John McMaster <a moz-do-not-send="true"
rel="nofollow" shape="rect"
class="yiv5747781064moz-txt-link-rfc2396E"
ymailto="mailto:johndmcmaster@gmail.com" target="_blank"
href="mailto:johndmcmaster@gmail.com"><johndmcmaster@gmail.com></a>
<br clear="none">
<b><span style="font-weight:bold;">Cc:</span></b>
<a moz-do-not-send="true" rel="nofollow"
shape="rect"
class="yiv5747781064moz-txt-link-rfc2396E"
ymailto="mailto:sem@lists.noisebridge.net" target="_blank"
href="mailto:sem@lists.noisebridge.net">"sem@lists.noisebridge.net"</a>
<a moz-do-not-send="true" rel="nofollow"
shape="rect"
class="yiv5747781064moz-txt-link-rfc2396E"
ymailto="mailto:sem@lists.noisebridge.net" target="_blank"
href="mailto:sem@lists.noisebridge.net"><sem@lists.noisebridge.net></a>
<br clear="none">
<b><span style="font-weight:bold;">Sent:</span></b>
Tuesday, September 2, 2014 12:13 AM<br
clear="none">
<b><span style="font-weight:bold;">Subject:</span></b>
Re: [Sem] Picked up a sputter coater<br
clear="none">
</font> </div>
<div class="yiv5747781064y_msg_container"
id="yiv5747781064yui_3_16_0_1_1418428069474_25393"><br
clear="none">
Well that's a breakthrough. Maybe Alan has
something to coat. <br clear="none">
<br clear="none">
Sent from my iPhone<br clear="none">
<br clear="none">
> On Sep 1, 2014, at 22:41, John
McMaster <<a moz-do-not-send="true"
rel="nofollow" shape="rect"
id="yiv5747781064yui_3_16_0_1_1418428069474_142720"
ymailto="mailto:johndmcmaster@gmail.com"
target="_blank"
href="mailto:johndmcmaster@gmail.com">johndmcmaster@gmail.com</a>>
wrote:<br clear="none">
> <br clear="none">
> ...3.5 hours of driving each way
later. Hit me up if you need to coat
something. I have a gold target for it<br
clear="none">
>
_______________________________________________<br
clear="none">
> SEM mailing list<br clear="none">
> <a moz-do-not-send="true"
rel="nofollow" shape="rect"
ymailto="mailto:SEM@lists.noisebridge.net"
target="_blank"
href="mailto:SEM@lists.noisebridge.net">SEM@lists.noisebridge.net</a><br
clear="none">
> <a moz-do-not-send="true"
rel="nofollow" shape="rect"
target="_blank"
href="https://www.noisebridge.net/mailman/listinfo/sem">https://www.noisebridge.net/mailman/listinfo/sem</a>
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<div class="yiv5747781064yqt2957129140"
id="yiv5747781064yqtfd81589"><br
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_______________________________________________<br clear="none">
SEM mailing list<br clear="none">
<a moz-do-not-send="true" rel="nofollow"
shape="rect"
ymailto="mailto:SEM@lists.noisebridge.net"
target="_blank"
href="mailto:SEM@lists.noisebridge.net">SEM@lists.noisebridge.net</a><br
clear="none">
<a moz-do-not-send="true" rel="nofollow"
shape="rect" target="_blank"
href="https://www.noisebridge.net/mailman/listinfo/sem">https://www.noisebridge.net/mailman/listinfo/sem</a><br
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