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Date: Thu, 24 Sep 2020 12:15:46 -0700
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From: Margaret Rakas <mrakas**At_Symbol_Here**SMITH.EDU>
Subject: [DCHAS-L] Argon Ion Polishing TEM Specimens-Exhaust Issues
Date: Thu, 24 Sep 2020 15:01:04 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: CAAszpkwWnZBX4Py5y4hcYWuT7o+uR8ZfmNiAuA_bzOnsO0DwSg**At_Symbol_Here**mail.gmail.com


Hi,

We are purchasing a Gatan PIPS II precision ion polishing system for TEM specimens. It comes with a 80 L/s turbo drag vacuum pump; argon gas is used to provide the ions. Specimens are typically treated for 10's of seconds, typically for a minute or less, according to the mfg. I can't imagine we would actively use this for more than an hour at a time; typical time would probably be 30 minutes. The vacuum pump has the oil on fllter disks, so there is no free liquid.

Anyone have one of these (or a similar model by Leica, or ...) and have exhaust/ventilation issues? We would not be using a gas other than argon; the samples are silicon.

Many thanks!
Margaret

--
Margaret A. Rakas, Ph.D.
Lab Safety & Compliance Director
Clark Science Center
413-585-3877 (p)

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