Difference between revisions of "August 24, 2007 - Cosmic Telescope"
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This is the data explained on the page of August 23. | This is the data explained on the page of August 23. | ||
| − | The three points with 175 mV, 200 mV, and 300 mV on both were taken just to reassure the tendencies of the | + | The three points with 175 mV, 200 mV, and 300 mV on both were taken just to reassure the tendencies of the scintillators at different thresholds. |
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| + | This is a graph of the three main sets of points. | ||
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| + | [[Image:Threshold Zeroing]] | ||
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| + | After all these experiments, the scintillators will be set at a High Voltage of 1250 Volts and with a Threshold of 225 mV. Longer term measurements are now commencing. With these voltages and thresholds, a measurement was started at 5:13 pm on 8-24 with the telescope vertical (0 degrees). Tomorrow the measurement will stop and we will set the thresholds at 250 just to make sure that the range is still working. That will run until monday. All the data will be put on the page for Monday the 27th. | ||
Latest revision as of 00:18, 25 August 2007
This is the data explained on the page of August 23.
The three points with 175 mV, 200 mV, and 300 mV on both were taken just to reassure the tendencies of the scintillators at different thresholds.
| Plateau Zeroing | |||||
|---|---|---|---|---|---|
| Time | Threshold on top scint. | Threshold on bottom scint. | Singles Count (on top) | Coinc. Counts | Coinc. per minute |
| 30 min | 225 | 225 | 2108 | 77 | 2.57 |
| 30 min | 250 | 225 | 1874 | 74 | 2.47 |
| 30 min | 275 | 225 | 1656 | 78 | 2.6 |
| 30 min | 225 | 250 | 2697 | 83 | 2.77 |
| 30 min | 250 | 250 | 2333 | 85 | 2.83 |
| 30 min | 275 | 250 | 1848 | 82 | 2.73 |
| 30 min | 225 | 275 | 2606 | 56 | 1.87 |
| 30 min | 250 | 275 | 2022 | 47 | 1.57 |
| 30 min | 275 | 275 | 1768 | 76 | 2.53 |
| 30 min | 175 | 175 | 3787 | 94 | 3.13 |
| 30 min | 200 | 200 | 2675 | 69 | 2.3 |
| 30 min | 300 | 300 | 1580 | 57 | 1.9 |
This is a graph of the three main sets of points.
After all these experiments, the scintillators will be set at a High Voltage of 1250 Volts and with a Threshold of 225 mV. Longer term measurements are now commencing. With these voltages and thresholds, a measurement was started at 5:13 pm on 8-24 with the telescope vertical (0 degrees). Tomorrow the measurement will stop and we will set the thresholds at 250 just to make sure that the range is still working. That will run until monday. All the data will be put on the page for Monday the 27th.