From jrjain at snf.stanford.edu Wed Feb 4 21:53:28 2009 From: jrjain at snf.stanford.edu (jrjain at snf.stanford.edu) Date: Wed, 4 Feb 2009 21:53:28 -0800 Subject: Problem drytek2 SNF 2009-02-04 21:53:27: Process 3 Power Problem Message-ID: Tool is still having serious problems tuning properly. In the best case, started out with Fwd:Ref = 475:80, which then quickly reduced to 400:40. By word of mouth, other people are still having problems with Process 1 too. Power is very unstable, with the plasma cutting off entirely for even very small changes in COIL/CAP. From shott at snf.stanford.edu Mon Feb 16 13:40:09 2009 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Mon, 16 Feb 2009 13:40:09 -0800 Subject: Shutdown drytek2 SNF 2009-02-16 13:40:08: Working on ENI supply interface .... Message-ID: I'm shutting this down for a while to try to finalize the design of the ENI interface circuit. From shott at snf.stanford.edu Mon Feb 16 17:39:18 2009 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Mon, 16 Feb 2009 17:39:18 -0800 Subject: Shutdown drytek2 SNF 2009-02-16 13:40:08: Working on ENI supply interface .... Message-ID: Learned more about ENI supply. Voltage control is 0 -10 VDC for 0 - 1 kW. Forward and reflected out are 0 - 1 VDC for 0 - 1 kW. Drytek power read outs seem non-linear .. John From masaharu at snf.stanford.edu Tue Feb 24 00:23:49 2009 From: masaharu at snf.stanford.edu (masaharu at snf.stanford.edu) Date: Tue, 24 Feb 2009 00:23:49 -0800 Subject: Problem drytek2 SNF 2009-02-24 00:23:48: cannot tune power in program 3 Message-ID: couldn't tune power at all. forward was kept zero while reflection showed 20-100. From shott at snf.stanford.edu Thu Feb 26 17:48:01 2009 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Thu, 26 Feb 2009 17:48:01 -0800 Subject: Shutdown drytek2 SNF 2009-02-26 17:48:00: Inerface box voltage calibration .... Message-ID: From shott at snf.stanford.edu Thu Feb 26 19:10:40 2009 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Thu, 26 Feb 2009 19:10:40 -0800 Subject: Shutdown drytek2 SNF 2009-02-26 17:48:00: Inerface box voltage calibration .... Message-ID: From lindaw at snf.stanford.edu Fri Feb 27 14:14:12 2009 From: lindaw at snf.stanford.edu (lindaw at snf.stanford.edu) Date: Fri, 27 Feb 2009 14:14:12 -0800 Subject: Comment drytek2 SNF 2009-02-27 14:14:12: digital readout "LOBAT" Message-ID: The new digital power readout display has a small "LOBAT" in upper left corner of both forward and reflected power. Other than that, the system is working beautifully. From shott at snf.stanford.edu Sat Feb 28 11:29:52 2009 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Sat, 28 Feb 2009 11:29:52 -0800 Subject: Shutdown drytek2 SNF 2009-02-28 11:29:51: Shutting down to attach ENI supply in rack ... Message-ID: We expect to be back in operation by about 1 p.m. John From shott at snf.stanford.edu Sat Feb 28 15:09:31 2009 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Sat, 28 Feb 2009 15:09:31 -0800 Subject: Shutdown drytek2 SNF 2009-02-28 11:29:51: Shutting down to attach ENI supply in rack ... Message-ID: Mounted ENI in cabinet ... should be ready to run. I still need to put in a crossbar and a couple of holding tabs ... but that can be done in place. John