 Mon Jul 11 09:46:07 2011, Damien Gallop, , , 24/25Mg+1 from MWS for HERACLES on SEBT1
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Well, the plasma electrode shorted again, and Keerthi came in on Saturday to tear down the MWS and clean it. Beam is steady as she goes presently. Delivery
continues today in lieu of RIB unavailability for today. A switch to RIB is expected this evening. |
Fri Jul 15 10:30:11 2011, Damien Gallop, , , 24/25Mg+1 from MWS for HERACLES on SEBT1 
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25Mg beam mostly sitting on FC6 now, as HERACLES takes RIB. Source was opened
on Monday night to replace microwave window. Beam will be u sed again towards the end of the HERACLES run, then EOB tomorrow morning, Saturday. |
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Mon Jul 18 09:53:05 2011, Damien Gallop, , , 4He from MCIS to HERACLES done Saturday and Sunday
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Keerthi came in on Saturday morning and set up the Supernanogan source for 4He delivery. It looks like it went well. The original intent was to use the
MWS for this, but sputtering got in the way. He also came in yesterday to tweak the recipe to minimize 16O4+ and 12C3+ (A/q=4) contribution to the beam.
The run finished last night. |
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Mon Jul 18 10:02:42 2011, Damien Gallop, , , 24Mg+6 from MWS for DRAGON
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| Keerthi came in early this morning to set up OLIS for 24Mg delivery. HEBT tuning is in progress. |
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Tue Jul 19 17:02:44 2011, Damien Gallop, , , 27Al+1 from MCIS Setup
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| The DRAGON run finished this morning. Switchover to 27Al+6 in progress now. |
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Wed Jul 20 01:37:46 2011, Keerthi Jayamanna, , , Al beam development:
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Supernanogan is tested for Al+6 beam production.
A 8nA of mass 4.5 is seen. Background pressure is not good enough to
produce
more Al+6. Attempt to increase Al beam current with higher sputtering
voltages resulted in fast destruction of the Al sample.
Decided |
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Fri Jul 22 15:56:08 2011, Damien Gallop, , , 27Al+1 from MWS for DRAGON status
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There have been teething pains developing a good 27Al beam. The Supernanogan sputter source ate through aluminum rods like candy. The MWS worked for
a while, but would not hold a sustained plasma. IOS was opened a couple of times to clean the MWS. It ran for a while today, then blinked out. Leak checking
is in progress. But the source looks pretty tight from that point of view. |
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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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Mon Aug 15 10:19:18 2011, Damien Gallop, , , 84Kr from MWS to TITAN
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| The source was configured and switched over on Friday. Some teething pains over the weekend. Beam is on FC6 presently. |
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Fri Aug 19 10:01:52 2011, Damien Gallop, , , 17O3+ from MCIS to DRAGON
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Setup in progress. No foil at M:5. Source has been running since yesterday. Note that source was opened recently for MRO. Vacuum pumpdown chart for past
several days attached.
Later... ~10:00 ICR reported MCIS:PV1 closed. On closer inspection, it was pretty clear that the classic PLC "all PVs go to zero" state |
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Mon Aug 22 09:49:34 2011, Damien Gallop, , , 17O3+ from MCIS to DRAGON
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Delivery continues. The attached vacuum trar suggests that this is about as good as it's going to get. On the other hand, there is a uA of beam
on FC6. |
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Wed Aug 24 10:49:41 2011, Damien Gallop, , , 17O3+ from MCIS to DRAGON
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Delivery continues. There were several "PV1" trips over the past several days. ICR now has a recipe for resetting this condition. We await
a general instruction from ICR via email.
Meanwhile, MCIS:TP3 was off for the last while. ICR notified. Investigating. Turned on again. |
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Thu Aug 25 10:54:34 2011, Damien Gallop, , , 17O3+ from MCIS to DRAGON
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| Delivery continues. |
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Mon Aug 29 10:03:05 2011, Damien Gallop, , , 17O3+ from MCIS to DRAGON
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Delivery continues on autopilot. Looking good.
ICR noted that a seemingly unusual number of tweaks to the IOS separator magnet have been required. This is not so surprising, given that the magstab program
is not running presently. It is expected that today will be EOB for DRAGON. A switch to 58Ni is on deck. |
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Tue Aug 30 10:01:30 2011, Damien Gallop, , , 17O3+ from MCIS Reserved
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We are on orders to retain OLIS for accelerator development. The switchover to 58Ni, scheduled for this morning, is on hold.
Meanwhile, there were WFB1 and PV1 trips this morning. All reset and beam is on. The WFB paddle for the MCISRFS circuit was still rotating at a
reasonable rate. I adjusted the WFB setting for ON state with minimum flow. |
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Tue Aug 30 16:40:14 2011, Damien Gallop, , , 58Ni1+ from MWS to TITAN Setup
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| Source switchover from MCIS to MWS. Support gases and liners were pre-fitted. Source lit. Optics set for 20keV operation. ~50pA on FC6. |
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Wed Aug 31 12:12:39 2011, Damien Gallop, , , 58Ni1+ from MWS to TITAN Setup
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Beam on FC6 drifted overnight. Touch up a few things, notably the EE. 25pA on FC6 presently. I also increased microwave power for effect.
Later... about 25pA on FC6. Somewhat noisy, but also stable. I left microwave at 700W. Beam handed over to ICR at ~13:15.
A note about mass flow controller. The new Hastings controllers do indeed shut off completely at zero setting. It should be noted that control |
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Thu Sep 1 10:01:25 2011, Damien Gallop, , , 58Ni1+ from MWS to TITAN
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| Beam was established yesterday. It has grown nicely overnight. |
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Fri Sep 2 10:04:55 2011, Damien Gallop, , , 58Ni1+ from MWS to TITAN 9x
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Beam idled overnight. Average ~50pA at FC6. About half that on ILE2T:FC3 presently. Setup on TITAN side in progress.
Later... ICR is concerned about the OLIS separator magnet wandering during the day. It's sunny today, so I would expect a little more wandering
than on a rainy day. Also, they have significantly higher current at A/q >58.1 and asked if there could be another mass in the mix. Checking. |
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Tue Sep 6 16:37:24 2011, Damien Gallop, , , 58Ni1+ from MWS to TITAN
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Pilot beam delivery continues. Keerthi came in over the Labor Day weekend to help out on something.
Beam is scheduled for one more day. A source change is scheduled for 20:30 tomorrow. |