Time: 2017 Apr 26 5:43:17
Found 2166 logbook entries, displaying most recent 100
Logbook Contents (Most Recent Entries)
24 Apr 2017 Monday 15:42 [Devon] The sputter source burned across its extractor insulator. Source has been cleaned. Insulator replaced. Fresh Boron pellet loaded. The existing cesium was preserved under Argon. The "outgassing" procedure will need to be done prior to starting the source. The TV camera is pointed at the source ion gauge vacuum. It can take a long time to get beam from a clean source, don't be afraid to let it run overnight.
17 Apr 2017 Monday 16:15 [Devon] Discovered the cause of the weekend fire alarm in the LTR. The 65R leg gate valve solenoid fried.
16 Apr 2017 Sunday 00:38 [Devon] Fire alarm in LTR pipe 3 (middle bay) and elevated detections on other pipes and control room. Major stink of burned electrical. Emergency lighting CFL bulb in middle of LTR was out, could be culprit. Ran exhaust fans, stink gone, ready for easter bunny.
14 Apr 2017 Friday 11:19 [Alexander] Dear operators, we are going to resume the 11B+48Ca experiment on Monday, April 17, so help with shifts is greatly appreciated. Thanks !
12 Apr 2017 Wednesday 15:53 [carter/jacobs] The HVEC corona current feedthru started leaking SF6 and was also sparking at the designated grid voltage of -10 V. At a grid voltage of -10 volts, the 6BK4C corona current regulator tube plate was 17.5 KV and the corona feedthru was arcing to ground. The original feedthru seemed very fragile and it was decided to replace it with a coaxial cable type compression feedthru that had also been supplied by HVEC for another tank high voltage feedthru and was modified to accept RG-217/U cable and should have a DC breakdown in excess of 50KV. The internal spring/wire spool mechanism was modified to accept the solid core wire of the RG-217/U cable into a receiving socket so that the cable can be replaced without removing the corona point assembly. The short length of cable is inserted into the compression fitting, slides into the center conductor receiving socket and protrudes about 4" outside the tank and terminates into a 5/8" ball spark gap spaced from ground 1.1 cm for a spark gap voltage of approx. 40 KV. A new length of Glassman RG-8/U cable connects at the feedthru spark gap ball and runs to the corona current control module that contains the 6BK4C control tube. There is a spark gap at the plate of the 6BK4C tube inside the NEC corona control unit that consists of two 1/2" brass spheres separated by 1" giving an estimated spark gap breakdown of 80KV. The 6BK4C specifies a max plate voltage of 27 KV. We operate at a nominal corona current of 35uA. The original target grid voltage was -10 volts. At -10 volts on the grid of the 6BK4C the plate voltage was 19.5 KV. At times of instability the control grid could reach -25 volts and the 6BK4C plate voltage would reach 40KV and spark at the original feedthru. A modification was made to the corona control unit to limit the grid voltage to a maximum grid voltage of -15 volts and the 6BK4C plate would be limited to 24.5 KV to protect the tube and the feedthru. Since the stability of the pelletron is very smooth we have modified the standard operating point of the grid voltage to be -5 volts instead of -10 volts. This will lower the nominal voltage at the feedthru from 17.5 KV to 9.2 KV. If more dynamic range of control is needed in the future, the -10V operating point may be safely used at 17.5 KV.
06 Apr 2017 Thursday 13:02 [Devon] The active shooter training (ALiCE) will be offered on both Tuesdays, 4/11 & 4/18, from 9:00-12:00. The first 2 hours will be the general ALiCE training that could help you at anytime and anyplace in this day and age. The third hour will be to discuss the unique hazards that could arise in the accelerator lab. I have to admit, during the planning meeting for this training, a lot of good, useful, suggestions came up. This is not a mandatory training and its not just for operators and keyholders, tell your associates in the building too.
04 Apr 2017 Tuesday 13:04 [Devon] As requested, trying to set up active shooter training for everyone. Possible dates are Tuesday, 4/11, 9:00-12:00, or Tuesday, 4/18, same time. More info to follow...
31 Mar 2017 Friday 11:09 [carter] Dr. Andreas Ruben of W-IE-NE-R Plein & Baus Corp will be in the R.W Finlay Conference Room at the Edwards Accelerator Lab on Monday 3 April 2017 at 10:00 AM to demonstrate new equipment offerings they have for nuclear data acquisition and control needs. See http://www.wiener-us.com for info on their products. Please spread the word to anyone you feel might benefit from the demonstration.
28 Mar 2017 Tuesday 14:08 [Devon] The high voltage feedthru on the corona probe is failing. As a precaution the SF6 in the accelerator is being taken down to 0 psig (1 atm) to prevent gas loss. This means that we are extremely limited in capabilities until we are ready to make a permanent repair. It is our hope that we can still support the lab class for RBS, but there will be special operational parameters. You can read more about the saga in the logbook.
28 Mar 2017 Tuesday 14:02 [Devon] There was a spark after 2 hours of operation. The grid was running at -5 which corresponds to 10 KV at the corona feedthrough. Normal operation would give 18 KV at the feedthrough. We measured current and voltage on the corona feedthrough and found the values to be as expected, however the feedthrough continued to spark as soon as we reached 15 KV. Then we discovered that the feedthrough is also leaking SF6. The leak pegged both ranges on the new detector and still registered on the less sensitive old detector. Taking the gas down to 1 atm to prevent loss by catastrophic failure.
27 Mar 2017 Monday 15:45 [Devon] We’ve had a spell of spark trouble. Trying to run at 4 MV and repeated sparks. Reached the point that sparks were happening at 3.4 MV. But no sign in the data of resistor noise, charging system working fine, all indications that everything is normal. Began testing. Retracted the corona points and ran quite nicely at 4.1 MV. Moved the corona points in to operating distance started controlling – spark. Tried again, spark without controlling. Moved points back out, everything fine. Put a grounded current meter directly on the corona feedthrough to eliminate tube and HV cable, everything fine while passing 35 uA of current. Found the Teflon (?) insulator that was around the feedthrough had a spark hole in it. Shortened the Teflon insulator so that burn spot was not at the HV point, drilled out the burned spot too. Put everything back and spark. Changed the HV cable and tube, spark again. Cleaned the feedthrough and removed the Teflon (?) insulator and it all seems to be working at 4.017 MV. Experiment resuming…
22 Mar 2017 Wednesday 18:29 [Alexander] Dear operators We are starting a new experiment with the 11B 20 MeV beam on 48Ca target. This is collaborative experimet with faculty and students from Central Michigan University. They will come on Friday, March 24 and we will be running from Friday, March 24 to Friday March 31. I would like to ask students to help with shifts (including weekend March 25-26, if possible) and also encourage students to come and talk to visitors and see what is going on. Thank you.
16 Feb 2017 Thursday 09:15 [carter] Surveyed small target room and could locate no failed equipment. Tested DAQ systems and module electronics and all seem OK. Campus closed for water main break.
16 Feb 2017 Thursday 03:30 [Devon] There was a fire alarm that originated in the small target room at 02:28. There was also minor detections in Vault pipe 1. FD and PD were waiting when I arrived. On inspection, there was a distinct smell of burned electrical compents in the STR but smoke levels were back to normal. Unable to identify the source of the burn. Mech and Diff pumps still working, lights all working. Need to be on the lookout for for failed electrical component....
02 Feb 2017 Thursday 13:01 [Devon] I have scheduled fire alarm testing for Monday, 2/6, at 8:00 am.
30 Jan 2017 Monday 11:02 [Alexander] Fisrt of all, many thanks to Kristyn Brandenburg, Andrea Richard and Rekam Giri for their great help with shifts last week, and would like to remind operators that we are running this week as well and still need to fill in 3 evening shifts on Tuesday, Wednesday and Friday (01/31, 02/01, and 02/03/2017). Thank you !
27 Jan 2017 Friday 17:16 [carter] A new Epson PowerLite 955WH LCD Projector has been installed in the R.W.Finlay conference room. It is brighter, better resolution and has more inputs (HDMI also). Please give it a try before attempting to give a presentation and get familiar with it. The new HDMI cable is labeled "overhead HDMI 1". Other input cables are the same as before.
20 Jan 2017 Friday 10:51 [carter,massey,brooks] Radiation monitor yearly calibration check, each detector at 10, 20, 40 mR OK. 80% alarm check OK and 100% machine shutdown OK.
20 Jan 2017 Friday 10:09 [Alexander] We are going to start a new run on Monday, January 23, with a deuteron 0.5 MeV beam on Tritium target. This will be a continuation of the experiment on the deuteron break up cross section measurements in support of experiments at the National Ignition Facility of Lawrence Livermore Lab. We will try to keep it running for two weeks, so help from operators is needed. You are welcome to join the experiment by signing up for shifts , help on evening shifts is more preferable but other time slots are also welcomed. Thanks !
19 Jan 2017 Thursday 15:34 [Devon] Tank Opening, December 2016. --- 4419 chain hours. --- Searching for source of instability in GVM, tube/column downcharges, and tube entrance lens. Suspicious of gas quality and recirculation effectiveness. --- Inspected LE Tube grid entrance lens, nothing remarkable. Cleaned both LE Penning gauges. --- New blower to recirculate SF6. Old blower had much wear, would have taken more shop time than the cost of a new one. Also new pressure relief valve for blower, set for 6 psi. Old PRV was worn and chattered when running, filled pig with brass flakes. Source of noisy recirculator for how many years? New blower is producing 4 psi head, therefore PRV not opening in normal use. Very quiet. New chain coupling also. --- Corona points replaced. Current set from last entry had worn points with mild deposits. Replaced with tungsten points. 0.13" protrusion. 0.0125 - 0.1563 is range. --- Added selector valves and a pressure transducer to each of the 3 filter canisters in the recirculation loop. Replaced filters. Tried to seal filter cans with 4401 thermoseal gasket material but small leaks were present. Seal surfaces not smoothly machined. Switched to viton gaskets. Pressure drop data as follows: Blower in/out: 4.1 psi, Tank in/out: 1.2 psi, Dryer/Scrubber: 1.9psi, V1 Filter: 0.3 psi, V19 Filter: 0.3 psi, Dryer Filter: 0.3 psi. --- Changed Scrubber sieve material. All 3 sieves gained weight. 5A 11%, 4A 6%, 3A 9%. --- Inspected all resistors, all good. --- In the end it turned out that the GVM grounding brush was the problem, see separate notes on that.
19 Jan 2017 Thursday 13:36 [carter] Radiation monitor vault detector zero unstable. This amplifier was the last remaining original Kiethley K302 electrometer amplifier. It has now been replaced with a Burr Brown OPA128 electrometer amplifier as the others have been replaced.
17 Jan 2017 Tuesday 17:57 [carter] The GVM assembly was removed and upon disassembly it was found that the shaft grounding brush had broken off of the spring clip and was causing the resistance from the shaft to ground to fluctuate from 10 - 80 ohms measures with an ohmmeter, probably conducting through the bearings. The carbon brush was epoxied back onto the spring clip using silver bearing conductive epoxy. After repair the resistance from shaft to ground was a very stable 0.7 ohm (lead resistance).
17 Jan 2017 Tuesday 17:51 [carter] GVM electronics was tested using an SRS DS345 function generator and gave very good results. The DS345 was set to output a symetric triangle wave at 531 HZ and injected at the leads that connect to the gvm, signal lead connected through a 0.0175 uF capacitor and the shield lead to shield wire. GVM meter at console reads about 1.061 MV for a function generator output of 0.1 volts. Voltage read on console was extremely stable, +-1 KV.
04 Jan 2017 Wednesday 10:27 [Devon] Pelletron hour meter reading 1/1/2017: 4419. Accelerator operating hours in 2016: 1144.
15 Dec 2016 Thursday 09:55 [Devon] EPS was here for quarterly testing of the security system and looked at the cell phone issues during generator tests. Found cell battery wired backwards. Replaced it. Then generator guys showed up for test. No security system trouble. Problem solved.
08 Dec 2016 Thursday 13:55 [carter] Realtime accelerator logging will be down for upgrade. Hopefully back up by quitting time.
16 Nov 2016 Wednesday 09:50 [carter] The accelerator lab firewall has been upgraded to a new computer running the most recent release of Endian Community Firewall 3.2.1. If you experience any firewall related issues, please let me know. don
14 Nov 2016 Monday 08:56 [Devon] The alpha source diff pump heater has failed. Don't know if its heater or wiring issue yet. Na heater, He gas, and high vac gauge shut off. Will pursue after sputter source run.
06 Nov 2016 Sunday 21:04 [Alexander] We are going to continue the experiment started in January 2016 with Oslo-MSU-MCU collaboration. This time we will measure 68Zn(7Li,p)74Ge reaction to study the level density of 74Ge. The run will start on Monday and is expected to be continued this and the following week. Operator help would be appreciated. The sign up sheet is on the door of the control room. Students-operators, if interested, are welcome to learn more about the experiment and physics by talking to me, Steven Grimes and/or Magne Guttormsen - Oslo University professor who will be visiting us on November 10-11. Thanks !
14 Oct 2016 Friday 16:25 [carter] Test of all operators email...
14 Oct 2016 Friday 16:24 [carter] Test of logbook send message to Zach Meisel... Zach, Please let me know email@example.com if you get this test message. don
10 Oct 2016 Monday 10:42 [carter] Firewall power supply failed. New Antec VP450 installed.
07 Oct 2016 Friday 09:41 [Devon] Cleaned the coils on the process chiller this week. Big improvement in performance.
06 Oct 2016 Thursday 16:56 [carter] Ran today after recirculating gas overnight. No column current instabilities were seen like were seen yesterday but also did not attempt to go above 4.0 MV. Ran at terminal 1.7, 2.48, 3.45 and 3.98 MV.
05 Oct 2016 Wednesday 18:06 [carter] Ran at 1.7 MV and column and tube currents seemed about normal again after the problems seen at higher terminal voltages.
05 Oct 2016 Wednesday 16:24 [carter] In the run at 8 MeV (term = 3.957 MV), after about 30 minutes of running the vertical column current had slowly risen to about twice its normal value. When I noticed it, the current sum plot showed approximately zero but I noticed the column current and the high energy current were the same. The sum indicated zero because the up-charge had been increased to compensate for the additional current down the vertical column. I ran the terminal down to 0.5 MV to check the current ratios there. The vertical column dropped below the HE tube current but didn't return to its proper value, still a little high. I have turned the terminal down to 0 up-charge, self charge was .020 MV.
05 Oct 2016 Wednesday 15:13 [carter] 2 machine sparks today trying to reach 4.5 MV. First at about 4.3 MV shortly after a sharp 17 uA rise in vertical column current. No instability in LE vacuum preceded the spark. LE tube was conditioning normally with no rise in vacuum. About 2 hours later a second attempt to reach 4.5 MV also caused a spark at about 4.2 MV and was also preceded shortly with an increase in vertical column current of about 18 uA. Decided to run at 8 MeV (term = 3.957 MV) for the MIT high energy run. Maybe need to try drying gas before going above 4 MeV?
27 Sep 2016 Tuesday 19:56 [Alexander] Cs reservoir temperature dropped again (along with a beam current) replicating the behaviour seen in prevouse runs with a deuteron beam (see entries below).
27 Sep 2016 Tuesday 09:18 [Alexander] Need help with shifts, from Tuesday to Friday, September 27-30. 0.5 MeV deuterons on tritium target to produce 15 MeV neutron beam which will bombard heavy water to study deuteron break-up cross section. Thanks.
20 Sep 2016 Tuesday 14:39 [carter] Sputter source target supply was turning off after about 30 minutes running at about 5 KV and 6.5 mA. Supply would stay off about 10 minutes then turn back on. Cause was bad cooling fan in the supply. The cooling fans in both the Target amd Extractor supplies were replaced. Both had been in operation for 21 years, since 1995.
20 Sep 2016 Tuesday 09:03 [Devon] VESDA O2 detectors calibrated today. Next calibration due 3/20/17. Sensor manufacture date is 5/7/2015, they will need replaced next May or so, 2 year life.
12 Sep 2016 Monday 12:25 [Devon] Cs sputter source cesium reservoir had run dry. The last charge was 2 Sept 2015. The reservoir has been re-charged. The reservoir heater was checked out with a power supply and seemed to work fine. The source will be checked out with protons tomorrow.
10 Sep 2016 Saturday 13:19 [Tom Massey] Increasing the resivoir current did not increase the temperature. Don suggested there may be a short. We turned the current down to avoid further damage to the heater.
09 Sep 2016 Friday 13:53 [Tom Massey] The current has been falling around the same time every day during this run. In checking for a possible cause, the cesium resevoir temperature was found to drop over 10 degrees near the time as the reduction in the beam. We have increased the Cs heater current to 0.270 from 0.260 amp to offset this drop in temperature.
09 Sep 2016 Friday 09:14 [Don Carter] Don Carter has received tritium safety certification.
09 Sep 2016 Friday 09:13 [Jeremy Browne] I am now Tritium Certified!
08 Sep 2016 Thursday 09:19 [Kristyn Brandenburg] I have received tritium safety certification.
07 Sep 2016 Wednesday 17:33 [Alexander Voinov] I have received tritium safety certification.
07 Sep 2016 Wednesday 16:48 [David Ingram] I have received tritium safety certification.
07 Sep 2016 Wednesday 16:24 [Carl Brune] I have received tritium certification.
07 Sep 2016 Wednesday 16:14 [Nadyah Alanazi] I have received a tritium safety certification.
07 Sep 2016 Wednesday 10:00 [Rekam Giri] I have received a tritium certification.
07 Sep 2016 Wednesday 09:32 [Tyler Danley] I have received a tritium safety certification.
07 Sep 2016 Wednesday 09:32 [Som Nath Paneru] I have received a tritium safety certification.
07 Sep 2016 Wednesday 09:31 [Andrea Richard] I have received a tritium safety certification.
07 Sep 2016 Wednesday 08:53 [Thomas N. Massey] All operators who wish to participate in the current run with a solid tritium target should see me for training. The training on the standard operating procedures for running with a tritium target is required before you can run shifts with tritium
06 Sep 2016 Tuesday 12:05 [Alexander] We started D(n,2n) experiment I would like to call for operators. Please sign up downstairs if you can. We are running through this week until Saturday. Evening slots are available. However, if you want to take day shifts, just cross my name and put yours. Thank you.
31 Aug 2016 Wednesday 14:42 [Tyler Danley] I am now Operator 2!
30 Aug 2016 Tuesday 15:26 [Jeremy Browne] I am officially operator 2!
29 Aug 2016 Monday 16:10 [Kristyn Brandenburg] I am now an operator 2!
24 Aug 2016 Wednesday 13:52 [Som Nath Paneru] I am certified operator 2 for Edwards Accelerator facility. Thanks to evryone.
22 Aug 2016 Monday 16:22 [Colton Feathers] I am now officially Operator 2 certified!
05 Aug 2016 Friday 15:53 [jacobs] Tank opening, August 2016, 4095 hours. The terminal generator drive belt broke in two places, leading to upcharge being cut in half for expected suppressor/inductor voltages. Also found two floating vacuum planes (broken springs) near the exit end of the HE tube. Some disassembly required at the upper chain sheave to install a new drive belt: 1) Remove both electrodes and the carbon brush arm from their T shaped mounting block, hex head bolts. 2) remove the T shaped mounting block from the sheave base plate, two recessed allen head bolts. 3) raise and block the drive motor cradle to remove chain tension. 4) Pass new generator belt between chain and sheave. 5) Loosen generator tension bolt, install belt, re-tension, re-assemble.
03 Aug 2016 Wednesday 12:01 [jacobs/carter] We've had our first unplanned Pelletron charging system failure. It seems that we have lost the suppression/induction power supplies in the terminal as the upcharge is suddenly half of what we would expect. This loss of exactly half would indicate that both upper supplies failed, or, the AC generator failed, or, the AC generator drive belt failed. We'll hope for drive belt. Gas out Thursday morning....
19 Jul 2016 Tuesday 09:11 [Devon] Something fried in the HVAC air compressor starter box. FM electricians will come back tomorrow, when we're not running, for repairs.
14 Jul 2016 Thursday 17:31 [DCI] Ludlum DRD returned today at 3:00 PM by Crystal following their rcalibration check. She took the back the loaners.
14 Jul 2016 Thursday 06:24 [DCI] I have started the alpha source. David
13 Jul 2016 Wednesday 14:11 [carter] Test of mail to all operators after adding "Browne, Jeremy"
08 Jul 2016 Friday 10:29 [carter] Analyzing magnet would not run down. Seemed like an intermittent mechanical connection, when I attempted to slide the control chassis out I could hear it immediately run down and start working again. In an attempt to locate a possible intermittent, I have tightened all screws on the connection barrier strips, re-seated the variac servo drive transistors in their sockets, checked for any loose component leads on the circuit board and also cycled the auto/manual servo mode switch several times.
07 Jul 2016 Thursday 08:39 [DCI] Yesterday Grass cut should be back to treat large weeds near edge of the roof. A contractor walked through the building looking for places to put hot and cold water meter. I told him we had an ineffective water heater now. Mike West and Todd Schram(sp?) looked at the flashing on the roof damaged by a mower. Mike will get with Facilities about repairing it. He said they may use the contractor doing the Clippinger roof. We had a meeting with them today, that was why he and Todd were around. I also reminded him about the problmes with the undercapacity downspouts.
03 Jul 2016 Sunday 02:50 [Devon] Dock VESDA having low air flow problems. Vacuumed pipes, back to normal.
28 Jun 2016 Tuesday 11:06 [Alexander] We are looking for operators for Tuesday (06/28) and Wednesday (06/29) evening shifts. One overnight shift is also welcomed. I put sign up list in the control room. Any help will be appreciated. Thanks !
24 Jun 2016 Friday 17:47 [Carter] Test of All Operators list including new operators.
15 Jun 2016 Wednesday 16:39 [carter] Worked on analyzing magnet stability problem. After replacing the Burr Brown high stability amplifier the magnet seems to be performing normally again and stability seems very similar to switching magnet. Watched NMR all day on field sweep 3 and noticed no movement. Time will tell.
08 Jun 2016 Wednesday 14:39 [dkj] demonstration
07 Jun 2016 Tuesday 09:50 [devon] logbook demonstration
01 Jun 2016 Wednesday 11:22 [devon] operatpr training is fun, not
26 May 2016 Thursday 10:56 [carter] control1 computer has been imaged to a new western digital server grade 250 GB hard drive and the new drive has been installed in control1. The older drive has been retired as a backup. Also, a newer and brighter Planar PL1910M monitor has been installed as the old one was blooming.
24 May 2016 Tuesday 12:19 [Devon] Logs and user reports indicate that the fire alarm detection was in the control room (sector 3) and not the small target room.
20 May 2016 Friday 16:53 [DCI] I just pressed the RESET button on the #3 Veda unit in the mechanical room. That got rid of the trouble light on the fire panel.
20 May 2016 Friday 16:44 [DCI] Facilities were called and have reset the fire panel, or at least silenced the trouble alarm.
20 May 2016 Friday 16:27 [DCI] While pumping down the 15L chamber we had a problem with a leak. This appears to have been smelt by the fire sensor. The system hit the first level but has recovered. The main fire panel is still showing trouble.
17 May 2016 Tuesday 13:39 [carter] One more test of all operators email to OU official addresses.
17 May 2016 Tuesday 13:38 [carter] Email test specifically to jacobs
17 May 2016 Tuesday 13:10 [devon] testing email...
12 May 2016 Thursday 08:40 [Tom Massey] I am looking for the blue/green book which holds the radiation shutdowns. If this is not found soon, I will start a new book.
10 May 2016 Tuesday 16:31 [Tom Massey] All operators, Devon has greatly improved the emergency procedures. If you have any warning or alarm, you need to refer to this document!!! Familiaize yourself with the current Emergency Procedures. Devon has produced the clearest instructions of any set of procedure that I have worked with. Please read these as soon as possible!!!
10 May 2016 Tuesday 16:20 [carter] The logbook directed email functionality has been restored to the OUAL Electronic Logbook running on the new RHEL7 server at inpp.ohiou.edu.
10 May 2016 Tuesday 16:16 [carter] Test of updated All Operators List on new inpp server
10 May 2016 Tuesday 15:49 [carter] Test of logbook email to all operators list.
10 May 2016 Tuesday 11:13 [Tom Massey] Transmission for 7.6 MeV deuterium beam DC 7. microampere, f/1 4.0 microampere, HE cup 3.39 microampere, swinger cup "ii" slits, 2.0 microampere, Target 1.0 microampere. With f/8 this was between 50 and 60 nanoampere. This target current at f/8 is equivalent to 0.5 microampers at f/1.
10 May 2016 Tuesday 10:38 [carter] Another email test on Tuesday 10 May 2016
09 May 2016 Monday 16:46 [Tom Massey] The problem with the source camera has been fixed. By pressing the enter button while moving up with the camera returned normal operation.
09 May 2016 Monday 16:20 [Devon] All 4 of the VESDA units began generating repeated trouble messages this morning for "filter life near capacity". This seems to have been based on expired service time interval rather than actual filter performance. I changed the service interval from 2 years to 3 years, but still had to remove, re-install, and acknowledge re-insertion of each filter in order to clear the errors. Due for new filters, or another extension of service time, on 7 May 2017.
09 May 2016 Monday 13:37 [Tom Massey] The source camera will not move to allow the Glassman supplies to be viewed when zoomed in. It does not go upwards enough. The meters can be read when zoomed out. I have set them roughly by the video. I hav gone to the gate before the source area and checked their values. This can also be done using the accelerator status page after it updates.
06 May 2016 Friday 19:02 [carter] test for progress on edwards2 logbook sendmail
06 May 2016 Friday 18:57 [carter] I am in the process of getting logbook email to be allowed from the new server. Until this is resolved, directed emails from the logbook will not be delivered. You can cut and paste the logbook content into an email message for a temporary solution. Hopefully resolved soon.
06 May 2016 Friday 16:02 [carter] Made a couple modifications to address complications with the terminal leak induced shutdown yesterday. When the vacuum interlock shutdown the chain drive, it also shut down control power which is the desired interlock result. It also interrupted power to the terminal leak control and the terminal leak control could not reduce the gas flow after the shutdown until the control power was restored. This is not desired so I moved the source of the power for the terminal control (gas stripping) to outlet 2B-B which is only controlled by CB-6 in the bottom of the rack containing the terminal control module. This circuit breaker is turned off for tank entry so it should be off when tank is entered. Another undesired result of the shutdown was that the tube entrance lens remained on during the shutdown. I moved the power for the tube entrance lens to the original wire that went to the terminal control module (5A-A01) so that it will shut off the lens for an interlock shutdown (specifically to protect for vacuum loss). Basically, just interchanged the source of power for the tube entrance lens and the terminal leak control module.
05 May 2016 Thursday 17:42 [carter-server rollover] 05 May 2016 Thursday 11:11 [Thomas N. Massey] The gas stripping was turned up too high and this caused a trip due to high pressre in the tubes. The source was turned off in emergency mode to allow access to the low energy pumping station. The cesium resivoir current was turned down, the feed reservoir was turned down and the power supplies were turned down and then off. David Ingram was able to pump out the tube and restore the vacuum systems. Once the control power was restored, Don Carter was able to close the leak valve. The sputter source was restarted.
05 May 2016 Thursday 15:17 [carter-server rollover] 04 May 2016 Wednesday 13:25 [Devon] Recent events have caused many changes to the Emergency Procedures Book / Handbook Section. Remember - this is the book you should be reading any time there is an alarm or something goes wrong. Pay close attention to the parts labeled "Actions" as these are the things that you must do as the operator.