 Tue Jun 9 16:53:55 2009, Damien Gallop, Routine, General, Supernanogan development in progress
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Keerthi started the Supernanogan source today. His primary goal was to test out Rick's theoretical tune calculations. He was ecstatic with the results.
Rick's table gives a tentitive value for the Einzel lens. In fact the ideal value is at or even higher than the bias voltage. However, Keerthi experieced
sparkdowns at those voltages. Rick's calculation gives a reasonable number for better than 50% transmission between MCIS:FC0 and IOS:FC3. The Enzel lens |
Thu Jul 2 11:58:18 2009, Damien Gallop, Routine, General, Supernanogan development in progress 
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Happy Canada Day!
I noticed a long-term trend in beam intensity. I have every reason to believe that the source itself is rock-solid. I think it is temperature variation
affecting the Philtek power suply on the separator magnet. What bothers me is that the stability program appears to not be compensating for this. I am |
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Wed Jul 15 09:20:26 2009, Damien Gallop, , , Supernanogan development in progress
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Proposed run plan for this time:
Document TIGRESS tune.
18O4+ emittance scan.
Mass scan A/q = 0 to 25.
Repeat 18On+ emittance
scans at present RF frequency.
16On+ emittance scans at present frequency.
Plot 16On+ & 18On+ emittance on one graph.
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Fri Jul 17 11:10:21 2009, Damien Gallop, , , Supernanogan development done 6x
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Beam switched back to 18O4+ by 11:00 as agreed. Some glitches. Here are snapshots of how it looked at handover time.
Later... Sophia prefers using all previously-saved files including ion source. Okay.
Note: For fun, Controls took away isacwserv mid-morning. The ICR did not communicate to them that I was the user... Workaround done with Keiko. |
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Mon Jul 13 17:41:04 2009, Damien Gallop, , , Supernanogan development Monday morning
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As noted, Keerthi was called to restart the source after a power bump. He continued Supernanogan development through the night (can you imagine?!?).
He made some great progress. Here is a partial summary of his findings.
Actions taken: frequency scans across the entire range from 12-16GHz for each charge state of 18O. |
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Fri May 7 12:29:41 2010, Keerthi Jayamanna, , , Supernanogan development
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Supernanogan development for 33S started. All MW and MW and MCIS power sypplies are off.
Gas for microwave source also closed from hand valve
Later... separator field stability development. Local Hall probe is online. Let it cook. |
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Mon May 10 16:42:55 2010, Damien Gallop, , , Supernanogan development
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By agreement, the source came down this morning for continuing Supernanogan development. Main event: leak detecting.
Later... Robert and Tim lead leak detectors. Synopsis: A minute leak at waveguide flange on plasma chamber. We decided to seal it with a drop of
vacuum sealant. Worked like a jet. Once Supernanogan beams are done for this beam schedule, we will remove the waveguide and re-machine and weld the flange. |
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Tue May 11 08:55:41 2010, Damien Gallop, , , Supernanogan development
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Leak checking on the Supernanogan continues today. We are preparing for an up-coming 33S run, for which we want "perfect" vacuum. We're close.
Later... MCIS backing line is now running on leak detector only. Calibration in progress... Done.
There was a short MCIS vacuum excursion at ~09:15. There were two similar ones overnight. Probable cause: sealant outgassing. |
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Tue Jun 9 20:49:32 2009, Damien Gallop, Routine, General, Supernanogan RF & IOS slits
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I have been testing various RF power settings for cold starts and beam stability. No surprise, the best tuner setting is approximately midway at about
58%. Different slit selections tested. Emittance scans in progress. Done. |
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Mon Aug 8 17:08:28 2011, Damien Gallop, , , Supernanogan MRO
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Cart removed for source servicing. Source opened and split at front seal. Ground and plasma electrodes removed. All internal areas cleaned. Source reassembled.
Initial pumping in progress. Leak-up curve a little soft, but reasonable given the cleaning materials used: methanol, acetone, Simple Green. |
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Tue Jun 30 09:33:00 2009, Damien Gallop, Routine, General, Supernanogan Development begins today for two weeks
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Supernanogan development starts today. The TACTIC run, which ended around 08:30 today, appears to have been a success. TACTIC used our beam for setup
and pilot, then took 8Li from downstairs. Marco is doing some EOB checks now. We will begin at 10:00. First part of our run plan will be to compare the
present 16O2+ beam with how it looked when we started, and identify what might have changed. |
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Mon Aug 17 13:58:35 2009, Damien Gallop, , , Supernanogan Development begins today for one week
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Supernanogan Development begins. It will be a marathon. Main goals are high-charge emittance scans and RF frequency scans. Tall order.
Meanwhile, the MWS came out as planned. Thank goodness for the quartz liner, which took most of the hit from the magnesium. IOS optics are another
story. We are running with an alternate tune for Q1/Q2/Q3, as noted elsewhere. The Supernanogan, already at vacuum, pumped down nicely, as did IOS and |
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Thu Nov 26 06:20:21 2009, Keerthi Jayamanna, , , Supernanogan Development
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Swiched off all the pumps and ion gauge for oven installation.
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Thu Oct 30 22:09:02 2014, Keerthi Jayamanna, , , Suoernanogan steering
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IOS mass scan does not work.
A/Q FC6 X
Y CCB1 |
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Fri Jun 19 20:15:19 2009, Damien Gallop, Routine, General, Summary of 16On+ emittance scans
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Here is a list of 16On+ emittance scans for today. Although IOSIOC got rebooted, restored tune was identical and trouble-free, and RF was untouched.
Save file: 090619_0859.snapmcisfc6. Emittance values: pi-mm-mrad
at 39%, 63%, 86% and 90% respectively. Here we go. |
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Sun Dec 2 22:32:19 2012, Keerthi Jayamanna, Routine, General, Still cannot write anything other than Subject
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Wed Feb 22 21:51:40 2017, Keerthi Jayamanna, , , SIS first beam is N1+1
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| Chris confirmed the first SIS beam would be Na+1. Next Rb+1 and then Li+1 |
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Thu Nov 13 16:31:54 2014, Brian Minato, Other, Other, SIS
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A new SIS source has been installed. The oven has been loaded with Sodium Hydrogen Carbonate (Alfa Aesar 10863) and Rubidium Nitrate.
Pictures are located in 2014-11-13 Source and PS Pics |
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Wed Apr 29 07:48:22 2015, Brian Minato, Other, Other, Repair- Water leak inside HV cage
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A water leak was reported inside the HV cage (FR#8079). The cage was accessed to determine the source of the leak (WP#I2015-04-27-1).
The WMS cusp cooling line was leaking. It was close to the MCIS cart (at ground) and had sparked through. The hose was cut at the puncture
location and re-connected. to the fitting. It was re-routed to be further away from the MCIS cart. |
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Fri Jul 3 10:29:15 2009, Damien Gallop, Routine, General, RF frequency scans versus each charge state of 16O cont'd.
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16O2+ beam on FC6 = 10nA as before. Move to 16O3+ A/q = 5.33...
A frequency scan between 13 & 14GHz. I panned closer around two peaks at 13.11 and 13.12GHz. Best frequency so far is 13.1321GHz, which provides
a reasonably stable 150pA of 16O3+. |