From fanpy at snf.stanford.edu Sun Aug 2 22:48:27 2009 From: fanpy at snf.stanford.edu (fanpy at snf.stanford.edu) Date: Sun, 2 Aug 2009 22:48:27 -0700 Subject: Comment raith SNF 2009-08-02 22:48:26: crazy mouse on Leo Message-ID: the mouse of Leo computer went crazy near end of my session. Probably needs reboot. From jwc at snf.stanford.edu Wed Aug 5 16:58:46 2009 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Wed, 5 Aug 2009 16:58:46 -0700 Subject: Comment raith SNF 2009-08-02 22:48:26: crazy mouse on Leo Message-ID: From jesselu at snf.stanford.edu Thu Aug 13 11:01:18 2009 From: jesselu at snf.stanford.edu (jesselu at snf.stanford.edu) Date: Thu, 13 Aug 2009 11:01:18 -0700 Subject: Shutdown raith SNF 2009-08-13 11:01:18: T motor and loadlock valve errors Message-ID: Cannot successfully load or unload because the T motor cannot find its limits. Also, loadlock valve cannot be closed. Repeated attempts to load have all failed. Do not use the Raith. This problem has come up in the past; however, after not being able to find inner/outer position, the loadlock valve will not close. This is critical, because an open loadlock valve will cause the turbopump to overheat and fail. I contacted Dr. Joseph Klingfus at Raith and he led me through an involved procedure to manually close the loadlock. I had to open the backpanel on the Raith equipment rack and have left it open temporarily for convenience. Otherwise, vacuum levels seem normal. System is 1e-6 and Gun vacuum is 1e-9. From mtang at snf.stanford.edu Mon Aug 17 19:02:54 2009 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Mon, 17 Aug 2009 19:02:54 -0700 Subject: Shutdown raith SNF 2009-08-13 11:01:18: T motor and loadlock valve errors Message-ID: Lev came in and checked the system out. The system should be OK to use, with caution. Please read the caution/problem note. From mtang at snf.stanford.edu Mon Aug 17 19:05:39 2009 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Mon, 17 Aug 2009 19:05:39 -0700 Subject: Problem raith SNF 2009-08-17 19:05:39: T-valve & loadlock errors Message-ID: Lev repaired the system and cycled it. He didn't observe any more failures. But this is apparently intermittent and it may occur again. So, for now, the system is OK to use. But if this error is observed, either contact a Raith champion (if one is handy) who should be able to rescue the system in manual mode, or call Lev at his direct line, which is posted in the Raith room. DO NOT run with the loadlock not closed, as this will overheat/burnout the turbopump. Make sure to contact a Raith champion or Lev. From jwc at snf.stanford.edu Tue Aug 18 14:17:34 2009 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Tue, 18 Aug 2009 14:17:34 -0700 Subject: Problem raith SNF 2009-08-17 19:05:39: T-valve & loadlock errors Message-ID: From carterlin at snf.stanford.edu Sun Aug 23 14:37:32 2009 From: carterlin at snf.stanford.edu (carterlin at snf.stanford.edu) Date: Sun, 23 Aug 2009 14:37:32 -0700 Subject: Shutdown raith SNF 2009-08-23 14:37:31: Fatal LoadLock Error Message-ID: Robotic arm is inside and the valve cannot be closed From mtang at snf.stanford.edu Mon Aug 24 22:53:19 2009 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Mon, 24 Aug 2009 22:53:19 -0700 Subject: Comment raith SNF 2009-08-24 22:53:18: Update on status Message-ID: Lev Markov made the repairs as planned and tested. The system needs to be pumped down for several hours before use. Although the system has been tested, the only way to be sure the problem is resolved is to run it. We'll yellow light it in the morning for use, and if something does come up, James should be back by then to help. From mtang at snf.stanford.edu Tue Aug 25 07:47:35 2009 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Tue, 25 Aug 2009 07:47:35 -0700 Subject: Shutdown raith SNF 2009-08-23 14:37:31: Fatal LoadLock Error Message-ID: Lev came in Monday and repaired the system. If the problem is experienced again, please contact a Raith Champion or James to clear it. From mtang at snf.stanford.edu Tue Aug 25 07:49:42 2009 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Tue, 25 Aug 2009 07:49:42 -0700 Subject: Comment raith SNF 2009-08-25 07:49:41: Watch for loadlock error Message-ID: Lev has repaired and tested the system, but there is a possibility it may occur again. If it does, make sure to contact James or Raith Champion to rescue the system (do not allow the loadlock to pump continuously.)