 Wed Jul 15 10:51:25 2009, Damien Gallop, , , 18O7+ survey
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| A/q = 2.571 Field = 752.9 FC6 = 88pA |
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Thu Jul 16 14:50:38 2009, Damien Gallop, , , 18O7+ survey
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A/q = 2.5714 Field = 751.1G FC6 = 40epA
No emittance scan possible. |
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Fri Jul 17 10:28:09 2009, Damien Gallop, , , 18O7+ recheck
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| A/q = 2.571 Field = 753.5 FC6 = 50epA |
Wed Jul 8 19:07:15 2009, Damien Gallop, Routine, General, 18O7+ emittance scan 
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A/q = 2.57 FC6 = 0.25nA MB = 790.0G @ 46.2A
Not enough intensity for an emittance scan. |
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Wed Jul 15 10:52:25 2009, Damien Gallop, , , 18O6+ survey 7x
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A/q = 3 Field = 813.2 FC6 = 2.9nA
Beam is too faint for a good emittance scan, but it's visible. Redo with reverse bias, if possible...
Sideshow: IOSIOC reboot for Maintenance. Recovery protracted... Some MWS bias interlock problem. Also, many optics devices were zeroed. (When will |
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Thu Jul 16 15:22:51 2009, Damien Gallop, , , 18O6+ survey
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A/q = 3 Field = 811.2G FC6 = 1.6nA
Not quite enough beam for an emittance scan. |
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Fri Jul 17 10:03:07 2009, Damien Gallop, , , 18O6+ recheck
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A/q = 3 Field = 813.9G FC6 = 2.2enA
I tweaked the adjustment of the displayed A/q calibration to fit this one. |
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Wed Jul 8 18:57:09 2009, Damien Gallop, Routine, General, 18O6+ emittance scan
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| A/q = 3 FC6 = 5.5nA MB = 851.5G @ 50.1A |
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Wed Jul 15 14:41:25 2009, Damien Gallop, , , 18O5+ survey
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A/q = 3.6 Field = 888.6G FC6 = 10nA
Two emittance scans, one with the as-is emittance rig, one with a manually installed battery for bias. |
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Thu Jul 16 15:41:35 2009, Damien Gallop, , , 18O5+ survey
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| A/q = 3.6 Field = 888.6G FC6 = 6.2enA |
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Wed Jul 8 18:47:43 2009, Damien Gallop, Routine, General, 18O5+ emittance scan
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| A/q = 3.6 FC6 = 12.5nA MB = 931.8G @ 55.3A |
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Thu May 21 16:23:37 2009, Damien Gallop, Routine, General, 18O4+/8+ to TUDA-II declared done around noon
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End of run diagnostics done. See ISAC elog. Supernanogan cart is already installed and at high vacuum. Prepare to run 17O from Sgan sometime over the
weekend. Today's agenda:
1. Close 18O bottle and gas valves. |
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Mon Jul 13 09:49:52 2009, Damien Gallop, , , 18O4+ tuning to TIGRESS today
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As per our agreed deal last week, today is reserved for Supernanogan tuning to TIGRESS. Development will resume tomorrow.
There was a power bump overnight that knocked out many systems, including OLIS. The ISAC elog mentions something about it here.
It seems that Keerthi restarted the source. (Note to self: Write an ION with brief restart instructions for the Supernanogan.) 18O4+ beam was left on FC6, |
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Tue Jul 14 09:47:14 2009, Damien Gallop, , , 18O4+ tuning to TIGRESS this morning 7x
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We have a change of schedule. Due to circumstances, Sophia will continue tuning to TIGRESS this morning. Sgan Development will resume this afternoon.
Details: The beam path through the TIGRESS chamber is clear presently, and no detectors are mounted. It is the perfect time to send a nA pilot
beam to the end of the line. TIGRESS intends to install electronics starting at noon. Sophia expects to have tuning comfortably completed by then also. |
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Thu Jul 16 14:25:27 2009, Damien Gallop, , , 18O4+ survey
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| A/q = 4.5 Field = 993.5G FC6 = 24.0enA |
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Thu Jul 16 15:58:53 2009, Damien Gallop, , , 18O4+ survey
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| A/q = 4.5 Field = 993.5G FC6 = 20enA |
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Mon Jul 20 09:25:35 2009, Damien Gallop, , , 18O4+ run to TIGRESS complete
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The 18O4+ run at about 5MeV/u ended this morning with reasonable success, I'm informed, despite MCIS vacuum trips, SC cryo trips and a power bump for
good measure.This morning I found beam at FC6 unstable. It appeared to be toggling between plasma states. A little tweak of a few MHz up in microwave frequency
not only stabilized it but also multiplied the brightness. Too bad the users didn't have this beam. Emittance scan in progress now. |
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Wed Jul 15 10:27:18 2009, Damien Gallop, , , 18O4+ overnight and emittance check
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Repeat emittance scan of present 18O4+ beam. It compares okay (somewhat broader emittance numbers) with yesterday's scan. Also attached is FC6
beam overnight. Nice. |
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Wed Jul 8 09:34:58 2009, Damien Gallop, Routine, General, 18O4+ frequency optimization
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Starting frequency: 15.7864GHz => 870pA on FC6 Step size: 1MHz. Selected peaks shown. There were many smaller resonances in-between also.
Strong peaks at:
15.8594GHz => 7.5nA |
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Wed Jul 8 10:57:46 2009, Damien Gallop, Routine, General, 18O4+ emittance scans 10x
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Tune saved as 090708_1200.snapmcisfc6. I settled on the 15.486GHz
optimal frequency, and tweaked that for effect. Then I ran a few emittance scans. During that process, I noticed that the beam intensity had stepped down
and up a few times. So I tweaked the frequency again to return 30enA on FC6. Note that in this process the beam shifted slightly in the horizontal plane. |