Back to pilot beam status as of around 18:00 last night. A couple of sideshows through the evening. ICR made an elog entry about the IOS:MB field stability program here. But the information shown is inconclusive. As noted in a work permit, Magstab is in fact using our own Hall probe for reference. Unlike the EPICS Hall probe, ours is temperature-compensated. So two outcomes are certain:

1. The EPICS field will vary substantially as ambient temperature changes throughout the day.

2. A/q will vary by a proportionate amount, because it uses the EPICS field value in its calculation.

During the day today, ISACEPICS1 went down for a while, as seen in the attached Stripchart. On that same chart, you can also see the real stability of the separated beam. It varies directly as a function of the source itself, visible in the Q3 skimmer.

Later... Stability program is following source just about perfectly. Updated Stripchart (blue = FC6, red = Q3 skimmer) attached.

Beam continues to be reserved for E1147 pilot beam use. Beam was nice and stable overnight, as expected. Beam (blue) followed source (red), independently of ambient temperature, roughly reflected in the nearby Supernanogan plasma chamber temperature (maroon).

Later... at 10:14 today there was a sitewide power bump due to an HPL test. It tripped the cyclotron and one isolated ISAC ion gauge. The ICR operators saw the bump in the lights. OLIS went through it transparently, a fruit of a Maintenance a few weeks back.

Later... at around 17:00 I started the Supernanogan plasma. It is at low RF power for conditioning. HV is off.Gate valve into IOS remains closed.

MWS continues to provide 22Ne2+ for pilot beam use. Beam quietly sitting on FC6. Stripchart attached. Also, Supernanogan plasma is on at low RF power for conditioning.

Last day of this pilot beam to TUDA-II. Expect a beam switch tomorrow for sake of TIGRESS.

Attached is Stripchart of weekend beam operation. Pretty nice indeed. Top trace (red) is Q3 skimmer, representative of total beam out of the source  Blue trace is 22Ne2+ on FC6 with magnet field stabilization program active. Brown trace is NA-LCW temperature as measured at exit of Supernanogan plasma chamber. Note an inverse trend against ambient temperature. Something to investigate at some point.

Source started at 800W of microwave power and 2cc/min neon gas easily. New magnetron produces more power than the old one.

We should try to keep MW power under 500W during running and use only 800W for ignition.  EE left off for the night.

21Ne has been available from the MWS since mid-week. Here is roughly how last week unfolded to now:

Monday: MCIS -> MWS and remove MCIS cart
Tuesday: leakcheck MWS source gas manifold
Wednesday: Controls fixed interlock oddity on IOS:BIAS
Wednesday: Begin setup for TUDA-II
Thursday: continue tuning to TUDA-II
Thursday: prepare to commission new SEBT NIM
Friday: commissioning of new SEBT NIM
Friday night: begin setup of beam to TUDA-II
Saturday: 21Ne5+ delivery to TUDA-II began at about 07:30 for the first time
Saturday: 21Na5+ delivery to TUDA-II switch at about
Saturday evening: power bumps knocked out OLIS and other systems - thunderstorms - go idle for the night
Sunday afternoon: check tune with pilot beam
Sunday night: resume RIB delivery

I expect several energy changes over the next little while.

At the Beam Delivery meeting today, we discussed the up-coming 25Mg run, which has scheduled a mere 48h of turnaround time. I made it known that there is *no* margin in that time allocation. I put in a bid for the preceding Friday, August 1st. Marco didn't think it would be available that soon.

After their EOB with 17O3+ yesterday, DRAGON switched to 21Ne4+ running for charge distribution studies. Keerthi changed over the source gases for that around 08:30 yesterday. Things went well. Beam intensity dropped off and leveled off overnight. I tweaked up the source just now. Current at H2:4 moved from xe-10 to ~1.5enA. A stripchart is attached. Orange trace is H2:4, and green is COL0, which reflects total beam from the source.

Later around 11:00... a controls event happened. Cleared all SPs, etc. Of course that turned off the source. Restart okay. 3.8enA on FC6. Beam observed to H:5 (energy change in progress). RF screenshot attached, and also what the Compare utility displays right now.

Later... around evening... DRAGON experimenters reported that delivered beam couldn't possibly be 21Ne, based on certain charge ratios they see and calculate. A couple of hours OTP with ICR to discern masses, in particular 20/21/22 series at +1 and +4 positions. We are pretty confident that 21Ne4+ (A/q=5.25) is sitting at ~1160G or so. Previous running had been at some 1170G, which we believe is the next peak up. (It later was found to be 16O3+, i.e. A/q=5.333.) Based on that setup, ICR attempted to get beam through the line. They got it as far as the front of the DTL, but that was it. Then they returned it to the higher field value and sent it through, but no joy for DRAGON.

Next day, Wednesday: Keerthi did careful mass scan and A/q re-calibration. Then Sophia looked at the situation. When she was done and the experimenters online by ~midday, the separator was reported sitting at 1160.75G. Separator field chart for the period is attached below; red is field, green is A/q. The run concluded uneventfully somewhere around 21:00 on Wednesday evening.

Last night Keerthi resolved the sparking issue in MWS and started the source while I was present. There was a frozen interlock condition ion IOS:BIAS, which Graham resolved today. HV was on by ~11:00. Beam on FC6 immediately. It looks like Sophia took the beam at that point. I noticed that the Kepco appears not regulating, and in any event is close to a limit (0.3A). I have asked Sophia for five minutes to reset it.

It turns out that the system cannot see the Kepco on the USB port. This has occurred before. It will take some investigation... later. Also, the gaussmeter is reading erroneously, and MagStab iappears to have picked up the EPICS probe values instead, although no field corrections are being made.

OLIS beam to 8pi is planned for tomorrow. A 20Ne1+ beam of ~3nA at 28keV is the agreement. The 8pi line diagnosis is likely to take a couple or three days.

Beam is on for 8pi diagnosis by special request.

We set up beam in IOS yesterday. However, beam blinked out last evening, likely due to insufficient source gas pressure. Source restarted with just a little difficulty this morning. ICR adjusted downstream IOS optics to match into next section. Looking good, and they are tuning now, ~10:00 a.m.

Later... Save: 100114_1103.snapios8pi

Later... they found a problem with 8pi optics, a broken cable somewhere. They will resume testing with beam, once this is fixed.

Emittance scan of beam as delivered with ~1/2 uA of 20Ne1+ at FC6 with slits in at 1mm:

Later... They're done. ICR also tuned the line a little. Save: 100114_1533.snapios8pi

A stripchart of beam performance since we started this morning plus EOB emittance scans to follow.

20Ne1+ set up from the MWS and handed over to Sophia & Marco for accelerator recommissioning. Strip to 5+ at M:5. First day of beam. Happy St. Patrick's Day.

Later... a Stripchart of beam today: baby-blue trace is FC6. Also, here are screenshots of the source.

..................................................................................

Lots happened during OLIS Shutdown. In no particular order:

* DB1/3 optics refurbished.

* IOS:FC3 replaced.

* MWS refurbished.

* MWS microwave generator water interlock fixed.

* IOS:IG1 requires filament. Pending available window to vent.

* IOS:RP1 scroll pump refurbished. Base pressure <<14mTorr.

* IOS:MB vacuum box liners removed.

* IOS overpressure valve installed on DB6.

MWS is running well. Tune save: 100319_0901.snapiosdragon with beam observed to Prague magnet. Stripchart of last 24h attached.

Beam is on standby. Target snapshot in IOPS elog.  Over the last little while...

* IOS:IG1 repaired last evening. IOS vented to Ar, flowing for duration of repair. Standard Varian filament repair kit used with Dimo's instructions. Pumpdown and leak-up curve to be attached shortly.

* IOS:FC1 operation restored after cup was replaced during Shutdown. Being a safety cup, it required the air solenoid configured opposite to standard cups. Correct fix: Rotate solenoid 180*. Bias fails to come on automatically upon insertion. This is a completely separate fault, and likely predates cup replacement. Bias can still be switched on manually at any time.

* IOS:MB stability program was off during Shutdown and would not come back willingly. Investigated, and found blown fuse in output circuit. Fuses are 5A in a 4A circuit. Replace and go. Also added another ferrite core to serial cable between power supply and server.

* MCIS RF amplifier controls a week ago. For reasons yet unknown, the system lost its 2009 running configuration. Significant Controls work to restore. More work planned.

Beam stable as a rock overnight. Pity we have no-one using it at the moment! Stripchart attached.

Beam idling overnight. Yesterday ICR called me regarding an IOSIOC reboot and consequent fallout. In short, it turned off IOS:MB. Not good. While the fix was easy enough, it took time to find it, which would translate to downtime during regular delivery. A lesson learned. I just noticed now that the magnet stability program was out of range and obviously had been since the IOC reboot. I reset the power supply and field. This procedure will need to be integrated into the ICR routines for IOS. Attached is a Stripchart over the period.

OLIS sprung a water leak last night. Problem was sparking through a coiled  cooling line. I replaced the pair of cooling lines and rerouted them somewhat. Source is up again now.

Prepare to switch beam from 22Ne2+ to 20Ne1+. Skimmers from 22Ne2+ run shown below. Table of tune options below. We will be using the Rick Tune.

Device	Present Tune	Scaled	Scaled		Rick Tune	Scaled		Web Tune	Final
	22Ne2+	20Ne2+	20Ne1+		25Mg1+	20Ne1+		20Ne1+	20Ne1+
IOS:BIAS:VOL.VAL	22440	20400	40800		51000	40800		40800	40800
IOS:EE:VOL.VAL	1072	975	1949			3064		3064	1419
IOS:EESS:VOL.VAL	1810	1645	3290			0		0	0
IOS:XCB1:VOL.VAL	225	205	409			0		0	500
IOS:YCB1:VOL.VAL	268	244	487			0		0	140
IOS:CCB1:VOL.VAL	500	455	909			0		0	500
IOS:B1A:POS:VOL.VAL	3301	3001	6001			5693		5693	5933
IOS:B1A:NEG:VOL.VAL	3845	3496	6991			5693		5693	5933
IOS:XCB1AW:VOL.VAL	1658	1507	3014			4362		4362	3660
IOS:XCB1AE:VOL.VAL	2242	2038	4076			4362		4362	3660
IOS:YCB1A:VOL.VAL	412	375	749			0		0	340
IOS:Q1:POS:VOL.VAL	1215	1104	2208		-2425	-1940		0	1113
IOS:Q1:NEG:VOL.VAL	1215	1104	2208		-2425	-1940		0	1113
IOS:Q2:POS:VOL.VAL	148	134	269		-1115	-892		1428	892
IOS:Q2:NEG:VOL.VAL	148	134	269		-1115	-892		1428	892
IOS:Q3:POS:VOL.VAL	786	715	1429		0	0		2570	0
IOS:Q3:NEG:VOL.VAL	786	715	1429		0	0		2570	0
IOS:YCB3:VOL.VAL	397	361	721			0		0	500
IOS:MB:CUR.VAL	148	135	270			280		280	277
IOS:YCB4:VOL.VAL	316	287	575			0		0	470
IOS:CCB4:VOL.VAL	300	273	545			0		0	300
IOS:Q4:POS:VOL.VAL	1384	1258	2516		1333	1067		3392	1067
IOS:Q4:NEG:VOL.VAL	1384	1258	2516		1333	1067		3392	1067
IOS:Q5:POS:VOL.VAL	1254	1140	2280		0	0		2232	0
IOS:Q5:NEG:VOL.VAL	1254	1140	2280		0	0		2232	0
IOS:Q6:POS:VOL.VAL	0	0	0		3225	2580		0	2580
IOS:Q6:NEG:VOL.VAL	0	0	0		3225	2580		0	2580
IOS:YCB6:VOL.VAL	290	264	527			0		0	300

Saved tunes: 100518_1113.snapiosfc6 (strict) & 100518_1128.snapiosfc6 (tweaked). Emittance scan attached.

At noon, beam handed over to Sophia. She has questions about the defeats associated with the Q3 failure last year. Checking... done.

Summary of Q1/2/3 wiring status right now:

• Defeat remains on Q1.
• Q1+/- cables swapped at power supplies.
• Q2 output is normal (+ drives L/R and - drives T/B) and is opposite to Q1 and Q3.
• Q3 output is normal (+ drives T/B and - drives L/R).
• All wiring at DBs is normal.

Sophia is continuing her tuning using IOS tune as provided.

Later... Sophia reports that this beam transports nicely. That said, the IOS tune is a little different now. Compare attached below.

A 20Ne1+ beam from the MWS was established on Friday. Line tuning began Friday evening. A tune to the front of the SC LINAC was in place by Saturday. Tuning through was delayed by SC tank conditioning.When the LINAC is ready, tuning to TIGRESS will resume, expected today.

ISAC-I tuning done yesterday. TBC today into ISAC-II. Beam very nice overnight.

Beam from MWS quietly sitting on FC6 awaiting tune checks to TIGRESS. Next experiments up are 26Alg5+ to TUDA and 24Na5+ to TIGRESS. So we are poised for source switchover to provide 24/26Mg pilot beams from the MWS.