 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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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 |
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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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. |
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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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Fri Oct 2 09:38:26 2009, Keerthi, Routine, General, 33Sulfur development completed successfully.
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Sulfur-33 development completed successfully.
Three times of the requested
amount produced (1e9 x 3) from the source and two times
delivered to the DRAGON for verification.
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Wed Sep 30 15:30:04 2009, Damien Gallop, , , 33S6+ from MCIS for DRAGON setup
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Beam is stable enough to let Marco set up something to DRAGON. We are a couple of days early.
Also, we tested the attenuators, previously noted to be operating oddly:
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Mon Sep 28 14:16:47 2009, Damien Gallop, , , MCIS Cart down for TP1 Replacement
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We are taking the opportunity to replace TP1 today. Edi Dalla Valle is on it. Also, Diagnostics has a WP in the queue for looking at the attenuators,
so we have prepared IOS for venting.
Later... Cart was removed from cage for access. Pump was replaced successfully, and all volumes are under high vacuum now (17:00). In the end, |
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Mon Sep 28 14:12:17 2009, Damien Gallop, , , 33S5+ from MCIS on Friday 25-Sep-2009
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A sustained 33S5+ beam was generated in the Supernanogan on Friday, September 25th. Attached is a trar plot.
Source gas: SO2 through either of two calibrated leaks: 10-4 and 10-5ccm.
FC6 = 1enA. |
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Wed Sep 16 18:14:29 2009, Damien Gallop, , , Test scans for publication 2 19x
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090916_1206ILTEMIT.txt
Graphics with "color" in the filename will look in print the same as "greyscale" files. |
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Wed Sep 16 12:48:13 2009, Keerthi, , , 17O+5 double peaks
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090916_1242ILTEMIT.txt 17O+5 has two peaks.
090916_1355ILTEMIT.txt Repeat same measurement an hour later. (IOS bias was off in-between due to IOC/PLC reboots.) |
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Wed Sep 16 12:26:51 2009, Keerthi, Routine, General, 17O+3 emittance with changed steering
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| 090916_1222ILTEMIT.txt Changed the MCIS steering to center the beam in the EL. 17O+3 ~5uA, 50x100 |
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Wed Sep 16 12:20:10 2009, Keerthi, , , 17O+3 emittance with increased EL
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| 090916_1215ILTEMIT.txt EL increased, ~4.5uA, emittance increases, 50x100 17O+3 |
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Wed Sep 16 12:12:04 2009, Keerthi, Routine, General, 17O+3 emittance sacns
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090916_1156ILTEMIT.txt 17O+3 good settings 50x100 , 333nA Scale, ~4uA
090916_1206ILTEMIT.txt 17O+3 good settings 100x200 , 333nA Scale, ~4uA |
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Tue Sep 15 20:02:46 2009, Keerthi, , , 17O8+ on FC6 from MCIS
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| 0.4nA of 17O+8 is sitting on FC6. Development will continue tomorrow. |
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Tue Sep 15 19:46:21 2009, Keerthi, Routine, General, Supernanogan emittance scans 9x
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090915_1915ILTEMIT.txt = 17O +3, 4.4uA new tune, scanner offset +10V, scanner scale 100nA , 100x50 matrix
090915_1929ILTEMIT.txt = same as above with 200x100 matrix
090915_1949ILTEMIT.txt = after tune tweaking (not optimal; for reference only) |
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Tue Sep 15 16:56:03 2009, Damien Gallop, , , Test scans for publication
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| Here are pix of the same scan: original, then greyscale, then cropped, using The GIMP. Not bad. |
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Tue Sep 15 16:09:31 2009, Damien Gallop, , , MCIS Development 17O emittance scans 13x
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We noticed a double peak effect in the 16O3+ scan. I will set up the line for 17O3+ and see.
Scan #1: Double peak also visible.
Scan #2: Remove upstream slit altogether. Now profile is twice the size in the opposite direction of the double peak. |
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Tue Sep 15 10:32:39 2009, Damien Gallop, , , MCIS Development 7x
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So. We are preparing for a few days of Supernanogan development. The present run plan is to obtain good emittance scans for higher charge states of 16O,
17O and 18. We may be limited by the loss of MCIS:TP1, but maybe not.
Set up on nom 18kV tune based on last recent save: 090831_1104.snapiosfc6. MCIS HV tickled up to prevent extracted beam surges. |
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Tue Sep 15 09:54:22 2009, Damien Gallop, , , 16O3+ run to DRAGON ended on schedule at 08:00 8x
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The DRAGON run ended uneventfully. (That's a good thing.) I ran a few emittance scans on the beam as-is. It is clearly monoisotopic. The shape is a little
odd. Keerthi will comment on it in a while. Here are some pix. Below the emittance control panel are pix of the same beam at wider settings. Only the one
16O3+ peak is present. Finally, at the bottom is a pic of various parameters, the most important of which is COL0, which reflects the stability of the |