 Fri Oct 2 15:58:36 2009, Keerthi, , , 17O and Ne gases are now connected
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A 1e-5 atm.cc/sec of 17O leak and a 1e-6 atm.cc/sec of neon leak are connected to the source through center tube of the RF transfer antenna.
Ne valve is open for upcoming CSB test. 17O valve is closed. All optics are set to A/Q=5.5. RF, EL and HV are off for the weekend since
no ISAC ops at night. |
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Sun Oct 4 19:16:46 2009, Keerthi, , , OLIS status
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Supernanogan is ready with 22Ne+4 for upcoming CSB run. EL, HV and RF are on. The anlyzing magnet and the other optics are set for A/Q=5.5.
A 2nA of 22Ne+4 is sitting at the FC6. If require more current, increase the RF up to 25W or change the frequency to 13.256GHz. |
Tue Oct 6 15:22:43 2009, Damien Gallop, , , 22Ne4+ & 20Ne4+ operation 
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Over the weekend, Keerthi had set up 22Ne4+ to FC6 for the purpose of developing a tune matched with a similar tune from the CSB. However, yesterday
it turned out that the CSB could not generate a 22Ne beam sufficiently bright for tuning. So the project was scrapped. Keerthi then changed the source
for 20Ne4+ operation, and handed it over to Marco yesterday. I think that is going well. Here is a trar plot of overnight beam. |
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Tue Oct 6 15:28:31 2009, Keerthi, , , OLIS A/Q changed to 5 (20Ne+4)
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| Changed OLIS A/Q to 5 (20Ne+4) to satisfy the CSB and ISAC development changes. 8nA is sitting at the FC6 |
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Wed Oct 7 16:54:33 2009, Keerthi, , ,
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| Today Supernanogan vacuum found to be down in the morning. Restarted easily. |
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Thu Oct 8 09:39:52 2009, Damien Gallop, , , CSB Development with MCIS
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Friedhelm and Marco have requested 20Ne2+ from the Supernanogan, and plan to bring up the same from the CSB today. I am beginning MCIS bias conditioning.
Goal: 24kV, maybe 25. Last save: 091008_0933.snapiosfc6
Later... Conditioning completed to 26kV. Set up a 20Ne2+ tune. It's largely a manual operation. Q3 off in keeping with the failure that occurred |
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Fri Oct 9 16:33:45 2009, Keerthi, , , 33S development
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SO2 gas line is connected again. Leak hand valve is closed.
Intermediate section is pumping through source chamber.
CSB development is completed. |
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Sun Oct 11 13:16:39 2009, Keerthi, , , MCIS:TP3 was off
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MCIS TP3 foumd off by 1:00 pm. Restarted without a problem
Before TP3 is on MCIS:IG1 is 5.47e-8 Torr.
After MCIS:TP3 = 5.21e-8 Torr |
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Sun Oct 11 13:17:37 2009, Keerthi, , , Neon Leak closed
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| Neon leak close for upcoming 33S development. |
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Sun Oct 11 17:09:52 2009, Keerthi, , , Vacuum with IOS:IV7
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IOS:IG4 reads 1.25 e-7 Torr and IOS:IG1 reads 9.8e-8 Torr with IOS:IV7 is open
IOS:IG4 reads 8.35 e-8 Torr and IOS:IG1 reads 7.49e-8 Torr with IOS:IV7 is closed |
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Sun Oct 11 17:11:31 2009, Keerthi, , , MCIS turbo pumps power levels
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MCIS:TP1 = 12W
MCIS:TP2 = 11W |
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Tue Oct 13 14:14:17 2009, Damien Gallop, , , MCIS setup for 33S5+
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Keerthi has reinstalled the SO2 source gas bottle onto MCIS. Presently it is closed off to the source. We have restarted the plasma. Present goal: a
good setup for 33S5+ with background levels (hopefully near zero) on FC6. Source pressure was 4.xe-8 Torr this morning, and has crept up to 5.0e-8 since
we restarted the RF. |
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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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Thu Oct 15 21:06:10 2009, Keerthi, , , OLIS status
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33S development is completed. A 3nA of 33S+5 can be produced with 10W of RF power and 2.5mm aperture.
If more beam is needed apertures and the power must be increased. There are some consequences for doing this.
MCIS optics and RF are off for the night. |
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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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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. |
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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. |