 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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Fri May 22 10:50:06 2009, Damien Gallop, Routine, General, MCIS online with 17O3+ on FC6
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The previous 18O4+/8+ run to TUDA-II finished midday yesterday. OLIS was prepared for 17O delivery from the Supernanogan source. Leak checking was done
last night. The big offender was a failing metal seal on IOS:TP7. The pump will have to be replaced. Meanwhile the pressure is sufficient for 20nA of 17O3+
with 2.5mm (middle selection) apertures inserted. Present agreement is to leave TP7 as-is for this run. |
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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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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. |
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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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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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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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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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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 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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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 Oct 19 10:09:13 2009, Damien Gallop, , , MCIS on with 33S5+ on FC6
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| Switch on source for stats. Source lit up perfectly. Slight adjustment on RF frequency. |
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Mon Aug 17 15:53:54 2009, Damien Gallop, , , MCIS mass scans & initial emittance scans 11x
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High resolution zero to 25. Save file: masscorr_mcis_090817-highres.txt
Ack! Elog server went down at ~17:00!!!
18O4+ emittance scan at 22.44kV and slits open: 090817_1707ILTEMIT.txt |
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Tue Jul 14 15:19:51 2009, Damien Gallop, , , MCIS mass scan
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I have begun a mass scan from 0 to 25. It will be a while. Data file: masscorr_mcis__0-25_090714.txt.
25nA of 18O4+ restored to FC6. |
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Tue Sep 16 11:55:28 2014, Raymond Dubé, Routine, General, MCIS info
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| I found these files about the MCIS in Geoff folders in M:\ISIS\Geoff-110715\OLIS\SuperNanogan |
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Wed Oct 14 09:52:09 2009, Damien Gallop, , , MCIS development with 33S5+ today
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The source is on. There is background beam on FC6 presently, less than yesterday. That's probably a good thing. Let it cook for a bit, then check the
tune. Note: EL is off, as yesterday. |
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Wed Oct 14 12:06:46 2009, Damien Gallop, , , MCIS development with 33S5+
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MCIS was running with background only. Prepare to open SO2 source gas...
MCIS:IG1 = 5.4e-8 Torr
TP1 = 13W |
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Thu Oct 15 09:43:00 2009, Damien Gallop, , , MCIS development with 33S5+
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Source started. 33S5+ beam on FC6 using gas flow determined yesterday. At first blush, it appears we need a slightly higher flow. But for now we will
spend some time optimizing with what we have. We may open and adjust the flow later.
Later... This flow is okay for now. It requires a *really* fine control, which we do not have at present. 3enA with 10W of power. One source spark |
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Mon Jul 20 17:28:01 2009, Damien Gallop, , , MCIS cart removed from cage and parked
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We discussed whether or not to leave the Supernanogan in the OLIS Faraday cage, and decided no, because the up-coming runs will use the MWS at 42 and
52kV respectively, higher than the MCIS HV rating. Bonus: We have more working room in the cage. The cart is out and parked. Services are connected and
up. |