 Tue Oct 20 09:25:29 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 overnight
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The source stayed up quietly overnight with about 4enA on FC6. Once in a while a little burp occurs, visible as small beam and vacuum spikes. I have
tweaked the RF frequency up a little for better centre of range. |
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Wed Oct 21 11:01:37 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 overnight cont'd
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I alsmost want to write, see yesterday's entry! Source ran quietly with no interruptions. FTR, the separator stability program is also percolating along
nicely. It was taking hits from nearby EMI until I added a ferrite split core to its USB cable at the computer end. |
Thu Oct 22 15:54:24 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 overnight cont'd 
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The Supernanogan was on overnight quietly. FC6 went in this morning. (Didn't check if fingers were involved.) I now notice a strange pulsing in
our Stripchart. See what you think. Note: field and A/q max scales are orders of magnitude higher than real life.
Later...At around 14:00 I added ferrite cores to the field probe cable at the CANbus interface box. That clipped the high side of the pulses completely. |
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Fri Oct 23 09:55:41 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 overnight cont'd
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Beam stayed on quietly overnight, as did the separator stability program. Periodic pulsing continues to occur. No explanation has been proffered so far.
Adding ferrite cores appeared to clamp the high spikes, but high spikes reappeared around midnight. There does not appear to be any real effect on the
beam or separator. |
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Mon Oct 26 10:56:52 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 over the weekend
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On Friday we left 33S5+ on FC6. The separator magnet power supply tripped at some point for unknown reason. The operators turned it on again overnight.
Keerthi tweaked and tuned early this morning and just recently. Beam is back to FC6, but displayed A/q is off, though the actual beam is correct. |
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Tue Oct 27 09:22:14 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 overnight
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I had optimized the RF yesterday, but the source went into a dual-mode toggling regime. It is hairline to find a nice point. I also found that it responds
better if frequency is approached from high to low.
Later... After some tweaks earlier, beam is looking pretty good, a solid 3enA at FC6. |
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Wed Oct 28 09:33:51 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 overnight cont'd
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Beam was quiet overnight. I noticed a slow drift that seemed to follow the source pressure. My best guess is that our source gas "regulator"
is a little coarse at these flows. Save: 091028_0935.snapiosfc6 |
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Wed Oct 28 09:55:28 2009, Damien Gallop, , , Planned IOSIOC reboot
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Controls is rebooting IOSIOC. I have inserted MCIS:FC1 for the duration. Let's see what comes of it all.
Later... As expected, the reboot zeroed our optics. ICR issued a FR#4179
on it. Meanwhile, I rechecked the A/q calibration, and found it off a little. Below are before and after shots. The latter shows scanning in both directions. |
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Thu Oct 29 09:42:23 2009, Damien Gallop, , , IOSIOC work in progress
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Yesterday there was an IOSIOC reboot for a purpose. It was an opportunity to demonstrate to Controls that IOSIOC reboots materially affect the IOS section.
Controls responded to an ICR fault report on it, and have not reported back to ICR so far. The source was off overnight and remains off now. I have informed
ICR that if nothing happens this morning, I will restart the source after lunch. |
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Fri Oct 30 09:44:49 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 overnight
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Controls finished with IOSIOC work yesterday. ICR had restored most optics. I restarted the source last evening. As you can see below, the beam grew
nicely overnight. Sometime today I will ask ICR to reboot IOSIOC and see if everything stays up now.
One more thing. The chart shows the last couple of days' running. Prior to beam-off for IOSIOC, we observed periodic spikes of about 45m each in |
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Mon Nov 2 09:32:40 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6 over the weekend
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Beam came up nicely on Friday, and stayed up quuietly over the weekend. Note the absence of periodic spikes in the separator field readback since
the last IOC reboots.
Later... I have asked ICR to make us a nice emittance scan. (They are running beam at 8pi presently as well.) |
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Mon Nov 2 17:42:54 2009, Damien Gallop, , , MCIS online with 17O3+ on FC6
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As noted earlier, we have opened the OLIS cage and set up the source gases for 17O operation. It will take a while for the SO2 to pump away and for the
17O2 to equalize within the source body. Meanwhile, we have restarted the source with a preliminary 17O3+ beam on FC6. Without a doubt this will be unstable
for a time, and the source may blink out also. |
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Tue Nov 3 09:25:31 2009, Damien Gallop, , , MCIS online with 17O3+ on FC6 overnight
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We completed 33S operation last night, and roughed in a setup for 17O. We had 17O3+ on FC6 overnight; chart attached. It grew nicely. Keerthi is working
with the beam now. |
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Wed Nov 4 09:46:07 2009, Damien Gallop, , , MCIS online with 17O3+ on FC6 for development 9x
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Beam stayed up overnight nicely. Development today. RF scans in progress now.
Later... scanning done for the moment. Controls is looking at a PLC issue that has been on the books for a while. I have given the okay to turn
on and off MCIS:IG1 at will. |
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Thu Nov 5 09:45:03 2009, Damien Gallop, , , MCIS online with 17O3+ on FC6 overnight
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Beam was quiet overnight. Keerthi touched up the tune this morning, and it is quieter yet and a little more of it too.
Later... Handover to Sophia occurred as scheduled. Save: 091105_1203.snapiosdragon
An IOSIOC reboot occurred sometime over the lunch hour. The usual suspects went down, plus the field stability correction power supply went to |
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Fri Nov 6 11:17:54 2009, Damien Gallop, , , 17O3+ setup to DRAGON
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| As noted, we handed over the beam to our users yesterday by noon. Setup to DRAGON is continuing. The report this morning that beam is great. Good. |
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Mon Nov 9 09:30:10 2009, Damien Gallop, , , 17O3+ beam to DRAGON
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Beam delivery continued through the weekend. As noted on Saturday, current dropped precipitously due to source gas pressure. We have 2.3e-6eµA
this morning. |
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Tue Nov 10 09:36:39 2009, Damien Gallop, , , 17O3+ beam to DRAGON continuing
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Beam ran well overnight. Last evening Vacuum Group diagnosed and repaired a catastrophic leak in the ILT cross region. You can see in the attached plot
how venting that section caused elevated pressures in IOS, most likely due to the direction in which IOS:IV7 is installed. Most often it is the IOS section
that is vented, and the neighbouring sections remain at high vacuum. So this gate valve would be installed looking downstream so that venting on the upstream |
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Fri Nov 13 10:26:07 2009, Damien Gallop, , , 17O3+ beam to DRAGON continuing
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Beam and energy changes continued over the weekend. The ICR reports that things are going swimmingly, and that the users are happy. Scaler counts are
up some 30% or so from Tuesday. All good. A source and line touch-up Wednesday (Remembrance Day) morning and a tuning effort following an energy change
during the day on Wednesday produced strong and stable beam running. |
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Mon Nov 16 10:00:41 2009, Damien Gallop, , , 17O3+ beam to DRAGON end of run this morning
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| DRAGON declared EOB at around 08:00 today. Source and beam were switched to 21Ne4+ for calibration studies. |