[3dem] [External] Re: plasma cleaner question

[Sylvain Trepout]

Hi David,

This might be your solution story.

During plasma cleaning, the pump is on. Meaning that the plasma is being
sucked-up by the pump.
Since the pump is equipped with a small filter, there is no plasma released
by the glow-discharger.
And you might also want to tell your colleague that venting goes the other
way around, that is air from the room that goes inside the glow-discharger,
not the opposite.

Cheers,
Sylvain

PhD
Research Fellow - Microscopy Australia

*Monash University*
Ramaciotti Centre for Cryo-EM
G92, 15 Innovation Walk, Clayton Campus
Victoria, 3800 Australia

E: sylvain.trepout at monash.edu


On Thu, 15 Feb 2024 at 14:37, Morgan, David Gene <dagmorga at indiana.edu>
wrote:

> Ruben,
>
> That's my thought also, but one of the staff members seems to think that
> it will vent "plasma" into the lab. I've tried to convince her that's not a
> thing and that what does get vented isn't a problem, but to no avail.  So I
> was hoping to show her that I'm not the only person who believes this...
>
> Wish me luck :-)
>
>
> --
>     politics is more difficult than physics.
>                                              A. Einstein
>
>             David Gene Morgan
>         Electron Microscopy Center
>              047E Simon Hall
>              IU Bloomington
>           812 856 1457 (office)
>           812 856 3221 (3200)
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> ------------------------------
> *From:* Ruben Diaz Avalos <rdiaz at lji.org>
> *Sent:* Wednesday, February 14, 2024 10:22 PM
> *To:* Morgan, David Gene <dagmorga at indiana.edu>
> *Cc:* 3dem at ncmir.ucsd.edu <3dem at ncmir.ucsd.edu>
> *Subject:* [External] Re: [3dem] plasma cleaner question
>
>
> This message was sent from a non-IU address. Please exercise caution when
> clicking links or opening attachments from external sources.
>
> Hi David,
>
> We have also a Fischione plasma cleaner, to which we have connected a
> Nitrogen and an Argon tank. The instrument vents to the lab and EH & S has
> no problem with that. I don't think the process of plasma cleaning would
> produce any noxious gases anyway.
>
> Ruben.
>
>
> On Wed, Feb 14, 2024 at 12:48 PM Morgan, David Gene <dagmorga at indiana.edu>
> wrote:
>
> Hi,
>
> This is for any of you who have a plasma cleaner.  What have you done
> about venting the "exhaust gases" from the device?
>
> We are moving our Fischione plasma cleaner into a new area sample prep
> area.  In the old location, we were able to connect the exit port of the
> cleaner directly into the exhaust snorkel where a fume hood was once
> connected.  In our new location, that will either be impossible or will
> require a connection that spans many meters and passes through multiple
> walls.
>
> I am wondering how necessary people think it is to vent directly into some
> sort of building exhaust system.  Any thoughts?
>
> As always, thanks in advance for your comments and ideas.
>
> --
>     politics is more difficult than physics.
>                                              A. Einstein
>
>             David Gene Morgan
>         Electron Microscopy Center
>              047E Simon Hall
>              IU Bloomington
>           812 856 1457 (office)
>           812 856 3221 (3200)
>       https://urldefense.com/v3/__http://iubemcenter.indiana.edu__;!!Mih3wA!HhLnL_oMkmM1Frh6K2ArqncDdME-B8rVBhAh8P4fcMObkGG4GHgqc6_sjB1cFWjWElDtlHSLQaBBYNyOZsq8Cehhh1c4g-Tt$ 
> <https://urldefense.com/v3/__http://iubemcenter.indiana.edu__;!!Mih3wA!H1ezyicc3l9zqC84h5PenRpoYK2sNH9uBOXeEyt4bwThP5eeNk7_JR3tAVW05iBVg0yKt09vOIXBlbiajjOxOUA$>
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>
> --
> **********************************************
> Ruben Diaz Avalos,
> La Jolla Institute for Immunology,
> 9420 Athena Circle Dr.,
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> (858)752-6960
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