This entry was incorrectly added to the OLIS logbook.  it has been moved to the I3 logbook.

IOS:IG4 reads 1.25 e-7 Torr and IOS:IG1 reads 9.8e-8 Torr with IOS:IV7 is open

IOS:IG4 reads 8.35 e-8 Torr and IOS:IG1 reads 7.49e-8 Torr with IOS:IV7 is closed

Small peice of titanium wire is installed and running aroung 100pA of Ti+7 at FC6.

OSAC are OPs taking data.

Small piece of titanium foil 0.0005" thick is installed and running around 100pA of Ti+7 at FC6.

OSAC are OPs taking data.

90pA of Ti+7 is running smoothly. 22:05  Feb26th

2mm diameter Ti was installed to set the optics. Later 0.0005 in thick foil will be installed for real efficiency studies.

My first OLIS elog entry.

We did a test yesterday with the new Alga Microwave RF AMP, model # ALPA 50 Watt, serial # 130684 to be used for the MCIS.  We used the RF Generator from MISTIC and set the frequency to 13.80 Ghz, note that the RF Generator was/is  limited to 16DB maxiumum RF output.

The RF cable that we used was from the 200W RF AMP, it has a 20DB SMA attenuator at the Generator end, so we could only get about 25 Watts maximum output.

090916_1206ILTEMIT.txt

Graphics with "color" in the filename will look in print the same as "greyscale" files.

Here are pix of the same scan: original, then greyscale, then cropped, using The GIMP. Not bad.

Testing!

Vacuum Group applied a temporary fix to the lower body seal on IOS:TP7, which we found last night to be leaking. Edi tells me that similar seals have failed before. It's an O-ring, not a metal seal. The fix now was to marinate the outside seam with silicon grease and wrap with Teflon tape. We'll see how that improves the backing line after a while.

Meanwhile, Vacuum Group is setting up to leack check the work.

Pumping went well overnight. TP3 turned on around noon. Issues with Kepco communications.

Voltage              Current             MCIC:IG1

0                            0                       7.35e-8

0.3                        0.2                          "

1.6                        0.4                    9.1 e-8

1.6                        0.4                    7.79e-8 (5min later)

3.3                        0.6                    8.61e-8

3.3                        0.6                    8.98e-8 (5min later)

3.3                        0.6                    9.42e-8(10min later)   14.:36

3.3                        0.58                  7.89e-8                15:28pm

5.8(9.62RB)       0.8(0.48RB)     1.51e-7                 15:30pm

5.8 (9.62RB       0.78(0.47RB)   8.17e-8                 16:30pm

8.5V(14.15RB)  1.0(0.60RB)     9.5e-8)                  16.33pm

8.5V(14.15RB)   0.97)0.58RB)  8.52e-8                  16:45pm

11.6V(19.47RB) 1.20(0.72RB) 1.08e-7                  16:47pm

 15.2V(25.27RB) 1.4(0.83RB)  1.34e-7                   16:53

20.0V(33.02RB)  1.6A(0.96RB) 1.6e-7                    17:00

18.4V(30.52RB)  1.64A(0.98RB) 8.6e-8                  17:30

21.6V(35.92VRB) 1.8A(1.07RB)  9.42e-8                17:40

25.7V(42.73RB)   2.0A(1.21RB)   1.43e-7                17:50

23.6V(23.14RB)   2.02A(1.21RB) 7.7e-8                  20:20

Oven is off                                         7.62e-8              20:22

There are the last couple of hours of Supernanogan Development for this set. Our run plan included 17On+ studies. Time will not permit it this time around. Also, the emittance numbers of 16O and 18O are not distinctive enough as they stand to warrant studies of the in-between mass. Keerthi will run the emittance data files through his software during post-analysis, and we'll develop our next run plan based on his conclusions.

This morning I will redo a couple of emittance scans that were not optimal yesterday. We'll start with an 18O4+ emittance check, then 18O8+, where, though I don't expect an emittance scan, I do expect to see beam. A vacuum trip on Wednesday evening probably compromised source vacuum and therefore the ability to generate the higher charge states. Here we go.

18O4+ emittance checks well.

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)

We ran 32S5+ overnight. Keerthi has been working with the new surface source oven for the last couple of weeks. His results to come. Meanwhile, here are a stripchart of overnight beam plus a few panels after my tweaking. Slits are at 5mm position.

Observations:

• The heater responds smoothly in 0.1A steps.
• There is an optimal heater setting; more is not necesaarily more.
• As always, there are several RF resonances within a range.
• Higher resonance produces more beam but less stable.
• Lower resonance produces less beam but more stable.
• Optimal heater loading technique and current setting will require further study.

Save: 100202_1000.snapiosfc6

Last stripchart is FC6 starting a couple of minutes before shutting off the heater.

Power down everything around 17:30, and turn off IOS turbos. I have left IOS:IV0 open to ensure the intermediate section gets vented before the cart is removed. I am leaving the MCIS turbos on for now,. to continue pumpimg residual sulphur.

* 18On+ emittance scans at present ion source settings: complete today.

* 18On+ frequency measurements: Thursday.

* 17O source gas: open end of Thursday.

* 17On+ frequency survey: Friday.

* 17On+ emittance scans at idealized source settings: Monday.

* Development completion: Tuesday.

* 18O4+ setup for beam schedule: Wednesday.

Main event this morning so far: mass scans and post-scan analysis using Gabe's tools. We have a pretty good recipe now. Tight scan to mass 20 in progress. Later... good scan. Geoff and I did a dry run of our presentations for Friday morning. We used the Auditorium computers, etc. After some small teething pains, everything went well, including a cold start-up of the source. The 17O3+ emittance scan was taken quickly. Pretty good outcome anyway. The mass scan shows nice peaks at several known points: 1H+, 2H2, 4He, 7Li, 12C, 14N, 16O, 19F and 20Ne. Gabe's Calibrate tool returns values for the two constants that are pretty close to what is there now: -1 and 0.0419 calculated versus 0 and 0.0418 actual.