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New entries since:Wed Dec 31 16:00:00 1969
Entry  Fri May 14 08:50:56 2010, Damien Gallop, , , 22Ne2+ at 22.44keV for SEBT1 Picture_5.png

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.

Entry  Mon May 17 09:09:50 2010, Damien Gallop, , , 22Ne2+ at 22.44keV for SEBT1 Picture_6.png

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.

Entry  Tue May 18 09:03:32 2010, Damien Gallop, , , 22Ne2+ at 22.44keV for SEBT1 EOB Picture_6.pngPicture_7.pngPicture_8.png

EOB for SEBT1 run at 08:30, taking 11Li from ITE and 22Ne2+ from OLIS when needed. Attempted emittance scans last evening, but no data showed, and no more time to investigate. So be it. Another time.

Entry  Tue May 18 09:15:16 2010, Damien Gallop, , , 20Ne1+ at 40.8keV for TIGRESS setup 8x

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.

Entry  Wed May 19 09:55:51 2010, Damien Gallop, , , 20Ne1+ at 40.8keV for TIGRESS Picture_6.png

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

Entry  Mon May 24 22:42:51 2010, Keerthi Jayamanna, , , 33S development Picture_1.png

Tried to see the background before 33S installation. Found few problems: MCIS:YCB1 does not hold more than 58V.

Very difficult to transport the beam without YCB1. Need to find a solution. Open and fix it is not an option even though we have a ready spare. It will take two weeks to get the vacuum back.

------------------------------

Outgoing TIGRESS experiment was the occasion for another ISAC milestone, 8MeV/u through the SCC for the first time just around midnight last Friday, May 21st. This also represented the first 8MeV/u beam to an experiment. And we can proudly say that OLIS beam was used. TIGRESS run ended at 08:30 as scheduled. Attached is a trar graph of beam on FC6, snapped periodically throughout the run. As before, you can see a small daily variation likely related to temperature of NA-LCW. There were reports of HPL tests this past Thursday and Friday. Evidently no effect over here.

 

Entry  Tue May 25 00:19:18 2010, Keerthi Jayamanna, , , 33S 

 

Finally got something going. YCB1 short to the ground. YCB common plate connected to YCB1 power supply. We were lucky. Polarity was right. Ran the source with no 33S.
Saved file as “backgroundNo33S.dat” No optics set yet. SO2 connected not open yet. 33S 17% is in the oven, but not heated yet.
Entry  Tue May 25 11:28:00 2010, Keerthi Jayamanna, , , 33D dev 

after 24 hours background spectrum saved as "BackgroungNo33S002.dat"

RF Amplitude :1.553 , RFoutput power= 0, Output power (dB)=0  

Entry  Tue May 25 11:58:02 2010, Keerthi Jayamanna, , , 33S dev 

after 24 hours background spectrum saved as "BackgroungNo33S003.dat"

RF Amplitude :7.767 , RFoutput power= 5W, Output power (dB)=36.4

Entry  Tue May 25 22:02:41 2010, Keerthi Jayamanna, , , 33S spectrum 

33S spectrum is saved as 33S_spectrum.dat 

Entry  Wed May 26 18:16:10 2010, Damien Gallop, , , 33S Development grab.Cm6004.png

Some 3enA of beam on FC6 presently. Let it sit.

Entry  Thu May 27 09:11:10 2010, Damien Gallop, , , 33S Development and Handover Picture_2.png

33S on FC6 overnight. Preparing to send beam to DRAGON now, and confirm isotope.

Source gas pressure gauge on canister = -20"Hg. MCIS pressure = 7.8e-8 Torr.

Entry  Fri May 28 11:02:59 2010, Damien Gallop, , , 33S to DRAGON Picture_1.png

Beam tuning in progress. Source gas canister at -20"Hg. MCIS pressure at 7.62e-8 Torr.

Entry  Mon May 31 09:18:39 2010, Damien Gallop, , , 33S to DRAGON Picture_2.png

Delivery of 33S6+ to DRAGON continues. A couple of RF tweaks done over the weekend. Source gas canister pressure at -20"Hg. MCIS pressure at 7.3e-8 Torr. At this rate, we could deliver 33S until approximately forever.

Entry  Tue Jun 1 09:12:39 2010, Damien Gallop, , , 33S to DRAGON Picture_2.png

33S6+ delivery to DRAGON continues. Looks like there was an RF tweak overnight. Source gas canister still at ~-20"Hg. MCIS vacuum at 7.4e-8 Torr.

Entry  Wed Jun 2 09:19:04 2010, Damien Gallop, , , 33S to DRAGON 

33S6+ delivery to DRAGON continues. It is Maintenance Day for everybody else today. Source gas canister pressure = -20"Hg. MCIS pressure = 7.7e-8 Torr.

Entry  Thu Jun 3 09:29:11 2010, Damien Gallop, , , 33S to DRAGON Picture_1.png

33S6+ delivery to DRAGON continues until Saturday morning. All the signs are that beam is excellent. Source gas canister is still at ~-20"Hg, and MCIS vacuum is at 7.0e-8 Torr.

Entry  Fri Jun 4 09:30:48 2010, Damien Gallop, , , 33S to DRAGON Picture_2.png

Delivery of 33S6+ continues to DRAGON for the final day. Some online tuning of the line overnight. Source gas canister pressure remains at ~-20"Hg, and MCIS pressure is at 7.1e-8 Torr.

Entry  Mon Jun 7 10:36:14 2010, Damien Gallop, , , 15N setup over the weekend Picture_2.png

Keerthi set up the Supernanogan for 15N operation and destined for TIGRESS, using two source gas options: a miniature bottle of enriched 15N2 and a canister with a charge of research-grade 14N2. The canister is similar to the one we used for the 33S run to DRAGON, which finished Saturday morning. Canister is at -22"Hg and MCIS at 7.27e-8 Torr. A couple of beam stability tests were conducted at 15N4+ and 15N6+. Bob can choose which one he prefers to use. 15N4+ is selected and tuned through IOS up to the RFQ presently (~10:30 am).

Later... Bob reported at the Beam Delivery meeting that the 33S6+ beam was a very nice beam. We appreciate hearing it.

Entry  Tue Jun 8 09:27:54 2010, Damien Gallop, , , 15N4+ to TIGRESS Picture_4.pngPicture_5.png

User tuning began Sunday night. Beam physics expert chose to retire the IOS:Q1 defeat, as he did not know until yesterday that it existed. He discovered it after attempting to retune yesterday around noon from scratch and making a mess, notwithstanding Keerthi's clear instruction to leave it alone. He also does not know that Rick developed a tune for this, which provides cleaner transmission than the "book" tune. Pity. Presently there are some 75enA of beam at FC6. That should be enough. Note that there were some 90enA with the "defeat" tune in place, prior to changing the IOS tune. Canister is at ~-22"Hg, and MCIS pressure at ~7.0e-8 Torr at ~09:00.. ICR is tuning through presently.

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