From ifushman at snf.stanford.edu Fri Mar 4 18:17:14 2005 From: ifushman at snf.stanford.edu (ifushman at snf.stanford.edu) Date: Fri, 4 Mar 2005 18:17:14 -0800 Subject: Problem raith SNF 2005-03-04 18:17:14: EHT trip @ 20kV Message-ID: -ilya From jwc at snf.stanford.edu Mon Mar 7 09:12:14 2005 From: jwc at snf.stanford.edu (James Conway) Date: Mon, 07 Mar 2005 09:12:14 -0800 Subject: cancelling write -- PROBLEMS ON RAITH... In-Reply-To: <1109993203.422926f3a8ffe@webmail.stanford.edu> References: <1109993203.422926f3a8ffe@webmail.stanford.edu> Message-ID: <422C8B6E.7070801@snf.stanford.edu> Greetings: There were numerous reports of problems on the system in voice mails to me over the weekend. I will be taking the system at 10 AM to see where the problems actually lie. Sounds like there may have been damage to the ELPHY+ or the image display boards as we have observed during previous EHT trips in the distant past. Ryan Tu please grab me when you go to load the system at 9:30 AM... James Conway Ilya Fushman wrote: >There was an EHT trip when I tried to go to 20kV from 15kV. As a result, the >settings on the in-lens detector are off and when I try to go past ~ 15kX on >the magnification, the image area jumps to some random part. At this point >it's impossible for me to stig and focus. According to James the system >should be OK after 1 hr or so. I have another commitment and cannot stay >longer to find out. > >-Ilya > >--------------------- >Ilya Fushman >215 Swain Way >Palo Alto CA 94304 >(650) 804 1058 >--------------------- > > From jwc at snf.stanford.edu Wed Mar 9 09:07:19 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Wed, 9 Mar 2005 09:07:19 -0800 Subject: Problem raith SNF 2005-03-09 09:07:18: EHT trip was reported at 05:31:00 by user kychen51 Message-ID: Recived phone call at 05:31:00 by user kychen51 that a Load Lock error was tripped by user. jwc 03092005:09:11:00 From jwc at snf.stanford.edu Wed Mar 9 17:30:46 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Wed, 9 Mar 2005 17:30:46 -0800 Subject: Problem raith SNF 2005-03-09 09:07:18: EHT trip was reported at 05:31:00 by user kychen51 Message-ID: cleared System has been tested to 30 kV this afternoon with no arcing events encountered. JWC 03092005:17:28:00 From jwc at snf.stanford.edu Wed Mar 9 17:30:58 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Wed, 9 Mar 2005 17:30:58 -0800 Subject: Problem raith SNF 2005-03-04 18:17:14: EHT trip @ 20kV Message-ID: cleared From jwc at snf.stanford.edu Wed Mar 9 17:31:22 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Wed, 9 Mar 2005 17:31:22 -0800 Subject: Problem raith SNF 2005-02-27 01:17:12: EHT trip this afternoon system back up at 0114 Message-ID: cleared From jwc at snf.stanford.edu Wed Mar 9 17:35:30 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Wed, 9 Mar 2005 17:35:30 -0800 Subject: Comment raith SNF 2005-03-09 17:35:30: NO OPERATIONS ABOVE 20 kV Message-ID: RECOMMEND TO USERS TO BRING SYSTEM UP AT 10 kV AND AFTER 20 MINUTES TO ALLOW SYSTEM TO STABILIZE THEN GO DIRECTLY TO 20 kV. Today I tested the system ramping from 10, 15, 20, 22, 25, 27, 28 for ten minutes each and allowed to soak at 28 kV for ~ 30 minutes. Then ramped to 30 kV. No EHT TRIPS ENCOUNTERED. 30 kV OPERATION WAS SLIGHTLY UNSTABLE IN EMISSION AND WITH SLIGHT ELEVATED VACUUM LEVELS. (GUN 1.8E-009 mbar, 1.3E-009 Torr.) James Conway 03092005:17:33:00 From jwc at snf.stanford.edu Wed Mar 9 17:36:04 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Wed, 9 Mar 2005 17:36:04 -0800 Subject: Comment raith SNF 2005-02-04 09:00:14: NO OPERATIONS ABOVE 20 KV Message-ID: cleared previous comment and reposted with additonal information jwc From jwc at snf.stanford.edu Fri Mar 11 14:20:07 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Fri, 11 Mar 2005 14:20:07 -0800 Subject: Problem raith SNF 2005-03-11 14:20:07: operations restricted to 10 kV through the weekend. Message-ID: operations restricted to 10 kV through the weekend. This is to ensure we do not have any anomalous EHT trips through the weekend. JWC 03112005:14:24:00 From jwc at snf.stanford.edu Thu Mar 17 09:27:28 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Thu, 17 Mar 2005 09:27:28 -0800 Subject: Problem raith SNF 2005-03-11 14:20:07: operations restricted to 10 kV through the weekend. Message-ID: System tested repeatedly to 20, 25, and 30 kV acceleration voltages and no EHT trips were encountered. OPERATIONS APPROVED TO 25 kV for all users. JWC From jwc at snf.stanford.edu Thu Mar 17 09:28:14 2005 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Thu, 17 Mar 2005 09:28:14 -0800 Subject: Comment raith SNF 2005-03-09 17:35:30: NO OPERATIONS ABOVE 20 kV Message-ID: cleared operations allowed to 25 kV for all users