From latta at snf.stanford.edu Tue Jan 9 10:13:41 2001 From: latta at snf.stanford.edu (Nancy Latta) Date: Tue, 9 Jan 2001 10:13:41 -0800 (PST) Subject: MRC update Message-ID: Folks, Since several of you have asked, here is the update on the when the MRC will be back up and running; We are waiting for a part to be fabricated. We are using two sources for this part and the earlist we expect the part to be here is this week. The latest is Jan 15. If all goes well, the MRC should be operational towards the end of this week, Jan 11 or 12. Thanks, Nancy From mcvittie at cis.Stanford.EDU Wed Jan 31 13:35:38 2001 From: mcvittie at cis.Stanford.EDU (Jim McVittie) Date: Wed, 31 Jan 2001 13:35:38 -0800 (PST) Subject: High Leak Rate in MRC Message-ID: MRC Users, The MRC has a very high air leak rate. When I first tested it this morning, it was at 7.5 sccm or 250 mT/min. After I had opened it up and pumped it down a few times. It went up to 11.2 sccm or 360 mT/min. I really do not think, it is usable in a reliable way with this leak. The problem appears to be due to the problems we had with the installation of the new quartz electrode feedthru. It is not the correct size. This one was made for us as a favor at a small glass shop that did not have precision quartz cutting tools. Since early December, we have had two more feedthrus on order from a large glass shop. Last week I was told that they would be ready next week. Hopefully, we will get them next week and we will be able to solve our leak problem. In the mean time Cesar will see if he can do anything about the leak tonight. Thanks, Jim -------------------------------------------------------------- James P. McVittie Senior Research Scientist Allen Center for Integrated Systems jmcvittie at stanford.edu Stanford University Tel: (650) 725-3640 Rm. 336, 330 Serra Mall Fax: (650) 723-4659 Stanford, CA 94305-4075