Turns out I (S.C.) was never officially given BLOSA training. Marten is coming out to give me training and get the run started.
sec-butyl bromide survived (barely) shipping from Hunter. Outer glass containment shattered, but inner vial intact.
i0 gain is set to 7, It to 8.
| 001119.001 | 20:18 | -300,300 | 5 | 1 | sec-butyl bromide; edge scan Small edge jump (about 0.33), but definite EXAFS! |
| 001119.002 | 20:23 | -300,300 | 5 | 1 | Same--see if edge jump gets bigger or smaller Edge jump 0.41...cool! |
| 001119.003-046 | 20:27 | -300,300 | 5 | 1 | Same. Edge jump 0.53! Then 0.59. 0.65. 0.74, 0.80,0.86 Energy does appear to be drifting somewhat, but that may just be because of the low resolution... I take it back; it's an optical illusion 0.91,0.95,0.97,1.00,1.03 Lock does seem to be drifting; probably crystal is heating up. 1.06,1.10,1.13,1.15,1.17,1.20,1.23,1.24...1.34,1.35,..1.38, 1.40,1.41,1.43,1.44,1.47,1.49,1.50,1.51,1.52,1.54,1.55,... 1.60,1.61 |
| Calibrate peak of first deriv spectrum. Redid lockon |
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| 001119.047 | 01:20 | -2,2 | 0.1 | 1 | Horizontal motor scan 500 eV above edge. Looks like it's alittle misaligned; recalibrated |
| 001119.048 | 01:22 | -2,2 | 0.1 | 1 | Horizontal motor scan recalibrated slightly to choose what appears to be middle of window. |
| 001119.049 | 01:25 | -2,2 | 0.1 | 1 | Vertical motor scan It just kept going up; chose far right as new calibration point |
| 001119.050 | 01:27 | -2,2 | 0.1 | 1 | vertical motor scan effects are slight; may just be reading increase in partial pressure! recalibrated anyway. |
| 001119.051 | 01:28 | -5,5 | 0.1 | 1 | vertical motor scan |
| ^*$^*&^*&%%^&$ was looking at 1/It, not It. |
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| 001119.052 | 01:31 | -15,15 | 0.5 | 1 | vertical motor scan finally clearly found edge of window Chose reasonable looking place and calibrted |
| 001119.053 | 01:34 | -10,10 | 0.5 | 1 | horizontal motor scan beam appears a little wide narrowed horizontal exit slit |
| 001119.054 | 01:37 | -10,10 | 0.5 | 1 | horizontal motor scan Good. Recalibrated. |
| Upped I0 gain to 8; measured offsets. Retuned lockin. Noticed there's still a little liquid in the cap; good! |
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| 001119.055- | 01:47 | -300,-30,20,25k | 5,1,0.05k | 3,3,3 | sec-butyl bromide EXAFS scans Nasty glitch in I0 in middle of edge; seems to effect mu. Edge jump is about 1.7. ran out of Argon! Aborted scan; switched to N2 |
| 001119.056-057 | 02:02 | -300,-50,20,25k | 5,0.5,0.05k | 3,3,3 | sec-butyl bromide EXAFS scans 1st scan is not trustworthy because of change of detector gas. 2nd scan is better, but still somehat strange I0. Aborted so I could fool with lockin. I think lockin is better now. |
| 001119.058-068 | 02:59 | -300,-50,20,25k | 5,0.5,0.05k | 2,2,3 | sec-butyl bromide exafs scans Scanned right through the injection, so some of the scans are truncated. Not sure why that happened to more than one scan, though. Edge jump appears to be almost 2.4. (n.b. I've been measuring "edge jumps" to top of white line, which is of course an overestimate. It's a lot easier to eyeball, though, and I've been pretty consistent.) Thought for a moment I had some odd discontinuity in I0, but of course it's not odd at all: integration time changes! Transmission is really a bit too low, now...It current is around 0.05 above edge; 0.46 below edge. Feedback has naturally drifted a bit, but still acceptable, I think. |