 Tue Nov 10 09:36:39 2009, Damien Gallop, , , 17O3+ beam to DRAGON continuing 
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Beam ran well overnight. Last evening Vacuum Group diagnosed and repaired a catastrophic leak in the ILT cross region. You can see in the attached plot
how venting that section caused elevated pressures in IOS, most likely due to the direction in which IOS:IV7 is installed. Most often it is the IOS section
that is vented, and the neighbouring sections remain at high vacuum. So this gate valve would be installed looking downstream so that venting on the upstream |
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Fri Nov 13 10:26:07 2009, Damien Gallop, , , 17O3+ beam to DRAGON continuing
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Beam and energy changes continued over the weekend. The ICR reports that things are going swimmingly, and that the users are happy. Scaler counts are
up some 30% or so from Tuesday. All good. A source and line touch-up Wednesday (Remembrance Day) morning and a tuning effort following an energy change
during the day on Wednesday produced strong and stable beam running. |
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Mon Nov 9 09:30:10 2009, Damien Gallop, , , 17O3+ beam to DRAGON
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Beam delivery continued through the weekend. As noted on Saturday, current dropped precipitously due to source gas pressure. We have 2.3e-6eµA
this morning. |
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Fri Jun 12 14:24:49 2009, Damien Gallop, Routine, General, 17O3+ beam at optimized RF
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A comment about RF power came up at the presentation this morning. Intense X-rays can be produced not only at the peak efficiency and output of the RF
amplifier but also as a function of other parameters including source gas pressure, isotope(s), whatever you can think of. I set the RF at a mid-level
power, with power setpoint at 0dB and adjusted the RF for optimal current on FC6. This occurred at 13.0306GHz with 35W power. About 6nA of beam. Take a |
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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 12:20:10 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 12:26:51 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 12:12:04 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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Sat Nov 7 12:21:35 2009, Keerthi Jayamanna, , , 17O hand valve status
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17O+3 at FC6 became 550nA.
17O hand valve found to be closed. Probable cause may be the cold weather.
After opening the valve beam came back. 2.6uA of 17+3 at FC6. |
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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 Jun 19 11:59:49 2009, Damien Gallop, Routine, General, 16On+ emittance scans continue 18x
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Keerthi developed a nice 16O7+ beam to FC6 last night. Beam current is about 3nA presently. Here is the first emittance scan from 11:05 today. A little
spotty, but it's there. Higher resolution scan at 13:58 follows.
The third plot at 16:12 is 16O6+. |
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Wed Jun 17 17:01:07 2009, Damien Gallop, Routine, General, 16On+ emittance scans
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A series of 16On+ emittance scans. Benchmark scan of 16O5+ matched well with same scan done this morning. Subsequent scans beginning with 16O1+ were
thwarted by an IOSIOC seizure in the emittance rig EPICS panel, and an IOC reboot was required. ICR restored last saved DRAGON tune. So far, so good. Ah,
well, not so fast. I have to go fishing for beam on FC6. This may take a while... That's it for today. |
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Thu Jul 16 14:41:46 2009, Damien Gallop, , , 16O8+ survey
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A/q = 2 Field = 662.3G FC6 = 150epA (unstable)
No emittance scan possible. |
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Fri Jul 17 10:32:42 2009, Damien Gallop, , , 16O8+ recheck
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| A/q = 2 Field = 667.3 FC6 = ~10enA |
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Thu Jul 16 14:46:52 2009, Damien Gallop, , , 16O7+ survey
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A/q = 2.2857 Field = 708.0G FC6 = 70epA (noisy)
No emittance scan possible. |
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Fri Jul 17 10:30:27 2009, Damien Gallop, , , 16O7+ recheck
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| A/q = 2.2857 Field = 710.5G FC6 = 100pA |
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Thu Jul 16 15:11:16 2009, Damien Gallop, , , 16O6+ survey
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| A/q = 2.6667 Field = 764.7G FC6 = 3.0nA |
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Fri Jul 17 10:46:06 2009, Damien Gallop, , , 16O6+ recheck
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| A/q = 2.666 Field = 767.1G FC6 = 3enA |
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Thu Jul 16 15:38:58 2009, Damien Gallop, , , 16O5+ survey
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| A/q = 3.2 Field = 837.7G FC6 = 14.5enA |
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Wed Jun 17 10:14:57 2009, Damien Gallop, Routine, General, 16O5+ on FC6 overnight 6x
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The 16O5+ beam stayed up OK overnight. ICR took some emittance
scans this morning. They look interesting. A finer resolution scan is in progress presently. Goals today:
1. Comprehensive mass scan to A/q=100 |