Bottles for mineral oil arrive; graduate students hard at work.
Eric's bottles ready for testing.
Jen's bottles with one already gone!
Bottles for mineral oil arrive; graduate students hard at work.
Eric's bottles ready for testing.
Jen's bottles with one already gone!
| Oil Number | Vendor | Oil Name | Manufacturer | Density | Color |
|---|---|---|---|---|---|
| 1 | Witco | Scintillator Fluid | Witco | .843 | Clear |
| 6 | Precision Lubricants | Duoprime 90 | Lyondell | .848 | Clear |
| 4 7 | Lyondell Lubricants | Duoprime 70 Duoprime 90 | Lyondell | .855 .848 | Clear Clear |
| 2 | Parent Petroleum | Superla 7 | Chevron | Clear | |
| 10 | Penreco | Parol 80 HP | Penreco | .8618 | Clear |
| 9 8 5 3 | Boncosky | Marcol 7 Marcol 9 Marcol 10 Telura 622 | Exxon/Mobil | Clear Clear Clear Yellow |
Density and index of refraction measurements are made in the manner described in the "Dry Run". Oil 7 is the oil that is visibly yellowish. Click on the index of refraction to see the plot of the data points. The two measurements of oil 1 and the measurements of the Witco Oil and Dry Run Sample 1 lead to an estimate of the error on the density measurement of +/- .0012. Comparison of the density measurements with the measurements supplied by the manufacturers lead to an estimate of the error of .0037.
| Oil Number | Sample Number | Bottle Number | Specific Gravity | nD | Dispersion | Date Tested |
|---|---|---|---|---|---|---|
| 1 | 2 | 2 | .8488 | 1.4667 | 55.6 | 8/24/01 |
| 2 | 6 | 11 | .8384 | 1.4634 | 56.0 | 8/27/01 |
| 3 | 7 | 14 | .8380 | 1.4638 | 54.8 | 8/27/01 |
| 4 | 9 | 23 | .8532 | 1.4691 | 58.1 | 8/28/01 |
| 5 | 4 | 6 | .8540 | 1.4699 | 57.1 | 8/27/01 |
| 6 | 1 | 1 | .8516 .8504 |
1.4679 1.4682 |
58.0 55.4 | 8/24/01 8/28/01 |
| 7 | 5 | 7 | .8496 | 1.4680 | 56.4 | 8/27/01 |
| 8 | 8 | 16 | .8528 | 1.4689 | 53.9 | 8/28/01 |
| 9 | 10 | 28 | .8356 | 1.4620 | 57.2 | 8/28/01 |
| 10 | 3 | 3 | .8580 | 1.4716 | 59.0 | 8/24/01 |
The density and the index of refraction are highly correlated as shown in the attached figure. In this figure, the open crosses are the "known" samples, Witco, Walgreens, and Kensol oils; the open circles are the dry run samples; and the closed circles are the ten samples for the technical evaluation. The red, green and blue marks correspond to the red, green and blue lines of the mercury spectrum. The lines are linear fits of the density to the corresponding indices of refraction.
The following table contains the data from the Coffin Attenuation Tester. Click on the individual sample numbers to see the variation among the three runs on each test sample. All of the tube out runs can be seen in the attached figure. Likewise the empty tube runs are found in the next attached figure. There is a lot of variation in the empty tube runs that we do not understand.
| Oil | Sample | Bottle | Date Tested | Comments |
|---|---|---|---|---|
| 1 | 1 | 21 | 9/8/01 | Has absorption feature at 360 nm |
| 2 | 2 | 22 | 9/9/01 | Rises at 360 nm rather than 340 nm |
| 3 | 3 | 24 | 9/10/01 | Yellowish oil; rises at 440 nm and has short attenuation length |
| 4 | 4 | 25 | 9/7/01 | Some absorption between 360 and 420 nm |
| 5 | 5 | 26 | 9/6/01 | Some absorption between 360 and 420 nm |
| 6 | 6 | 30 | 9/5/01 | Excessive absorption between 360 and 420 nm |
| 7 | 7 | 39 | 9/4/01 | Excessive absorption between 360 and 420 nm |
| 8 | 8 | 33 | 9/2/01 | Typical "Good" Oil |
| 9 | 9 | 46 | 9/1/01 | Typical "Good" Oil |
| 10 | 10 | 54 | 8/29/01 8/31/01 |
Cut-off Wavelength at 310 nm |
The ratio of the PMT1 to PMT2 with oil divided by the ratio of PMT1 to PMT2 with the box empty is for the average of each oil and for the average of the empty tube is shown in the attached figure. The comments in the above table come from this figure.
The following table summarizes the results for the ten oil samples in the Alabama Attenuation Tester. Oil 6 is the oil that is visibly yellow. Click on the sample number to see the plots of the data.
| Oil Number | Sample Number | Bottle Number | Att. Length (m) At Zero | Att. Length (m) Fit | Att. Length (m) At 90 cm |
Date Tested |
|---|---|---|---|---|---|---|
| 1 | 8 | 41 | 8.12 8.78 |
10.81 +/- .15 10.76 +/- .16 |
15.04 12.91 |
8/31/01 |
| 2 | 9 | 37 | 7.64 7.22 |
10.17 +/- .13 9.50 +/- .11 |
13.96 12.87 |
9/4/01 |
| 3 | 6* | 44 | 2.12 2.09 |
2.21 +/- .01 2.20 +/- .01 |
2.39 2.43 |
9/6/01 |
| 4 | 5 | 53 | 8.76 11.11 |
14.17 +/- .24 13.74 +/- .22 |
28.84 17.01 |
9/5/01 |
| 5 | 1 | 60 | 8.07 7.45 |
16.08 +/- .31 13.71 +/- .22 |
77.60 40.13 | 9/6/01 |
| 31 | 10.63 10.95 10.78+ |
14.43 +/- .25 14.60 +/- .25 13.58 +/- .22+ |
20.03 19.68 17.06+ | 9/12/01 | ||
| 6 | 10 | 36 | 8.00 9.34 |
12.55 +/- .19 13.00 +/- .21 |
22.98 19.15 |
9/4/01 |
| 7 | 7 | 43 | 9.94 10.45 |
14.15 +/- .26 14.51 +/- .28 |
20.30 20.02 | 8/31/01 |
| 8 | 3 | 58 | 16.12 16.64 |
23.49 +/- .64 23.81 +/- .67 |
36.18 35.41 |
9/5/01 |
| 9 | 4 | 57 | 11.99 12.77 |
25.28 +/- .74 27.62 +/- .91 |
164.81 189.46 | 9/6/01 |
| 10 | 2 | 59 | 11.55 10.28 |
16.97 +/- .34 13.84 +/- .23 |
26.23 18.96 | 9/5/01 |
| 13 | 9.15 8.59 8.91+ 9.09+ 8.88+ 10.10+ |
17.75 +/- .38 15.79 +/- .29 13.47 +/- .21+ 12.11 +/- .18+ 11.77 +/- .16+ 11.70 +/- .16+ |
74.35 45.01 22.60+ 16.52+ 16.12+ 13.47+ |
9/10/01 |
*Please note change in vertical scale for sample 6.
+Runs with reused oil.
The "fit" attenuation length is the attenuation length from the exponential fit. These are illustrated in the data plots by the solid lines. Second order polynomial fits were also made. These are illustrated on the plots by the dotted lines. The "attenuation lengths" at zero and 90 cm in the above table are the values of this polynomial fit at zero and 90 divided by the slope at that point. The Chi-square/DOF for the exponential fits is always about 1 assuming an error on the current (and indirectly on the position) of .0035. With this error, the Chi-Square/DOF for the polynomial fit is always a small fraction.
As can be seen in some of the plots of the attenuation, there is significantly more curvature to the data than an exponential would predict. Rex has studied this problem and has written a note on his findings.
While we were testing these oils, the correlation between the three samples was kept secret. When all of the oils are tested, the correlation will be put into the following table.
| Oil Number | Randy's Sample | Jen's Sample | Eric's Sample | Oil |
|---|---|---|---|---|
| 1 | 2 | 1 | 8 | Witco |
| 2 | 6 | 2 | 9 | Superla 7 |
| 3 | 7 | 3 | 6 | Telura 622 |
| 4 | 9 | 4 | 5 | Duoprime 70 |
| 5 | 4 | 5 | 1 | Marcol 10 |
| 6* | 1 | 6 | 10 | Duoprime 90-2 |
| 7* | 5 | 7 | 7 | Duoprime 90-1 |
| 8 | 8 | 8 | 3 | Marcol 9 |
| 9 | 10 | 9 | 4 | Marcol 7 |
| 10 | 3 | 10 | 2 | Parol 80-HP |
A list of the gallon jug numbers for all of the oils along with their disposition is attached.