Difference between revisions of "September 4, 2007 - Cosmic Telescope"
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{| border="1" cellpadding="20" cellspacing="0" | {| border="1" cellpadding="20" cellspacing="0" | ||
| − | ! colspan="2"| | + | ! colspan="2"|Angular Distribution |
|- | |- | ||
|Time Start | |Time Start | ||
|Time Stop | |Time Stop | ||
| − | |Time elapsed (min.) | + | |Time elapsed (min.; hour) |
|Thresholds on both Scintillators | |Thresholds on both Scintillators | ||
|Singles Count (on top) | |Singles Count (on top) | ||
|Coinc. Counts | |Coinc. Counts | ||
|Coinc. per minute | |Coinc. per minute | ||
| + | |Coinc. per Hour | ||
|Angle measure | |Angle measure | ||
|- | |- | ||
|1:35 pm on 8/31 | |1:35 pm on 8/31 | ||
|1:10 pm on 9/04 | |1:10 pm on 9/04 | ||
| − | |5725 min | + | |5725 min; 95.42 hr |
|225 | |225 | ||
|626816 | |626816 | ||
|1654 | |1654 | ||
|.2889 | |.2889 | ||
| + | |17.33 | ||
|75 degrees | |75 degrees | ||
|}<br> | |}<br> | ||
| + | Cosmic rates measured each hour when the telecope accepts cosmics which intersect the earth's surface perpendicularly (defined as zero degrees). | ||
{| border="1" cellpadding="20" cellspacing="0" | {| border="1" cellpadding="20" cellspacing="0" | ||
|- | |- | ||
| Line 28: | Line 31: | ||
|Singles Count (on top) | |Singles Count (on top) | ||
|Coinc. Counts | |Coinc. Counts | ||
| − | |Coinc. per | + | |Coinc. per hour |
|<math>\sqrt{N}</math> | |<math>\sqrt{N}</math> | ||
| − | |<math>(x_i-\bar{x})^2</math> | + | |<math>\sqrt{(x_i-\bar{x})^2}</math> |
| + | |- | ||
| + | |1:20 pm || 2:20 pm ||1 ||5694 ||127 || 127 || 11.3 ||11 | ||
| + | |- | ||
| + | |2:20 pm || 3:20 pm ||1 ||4896 ||136 || 136 || 11.6 ||2 | ||
|- | |- | ||
| − | | | + | |3:20 pm || 4:20 pm ||1 ||4655 ||151 || 151 || 12.2 ||13 |
|}<br> | |}<br> | ||
| + | |||
| + | Mean <math>\mu</math> = 138 counts per hour | ||
| + | |||
| + | Instrumental Uncertainty =<math>\sigma = \sqrt{\frac{\sum (x_i - \bar{x})^2}{N-1}} = 12.12</math> counts per hour | ||
| + | |||
| + | The instrumental uncertainty is approximately equal to the Poisson sigma (<math>\sqrt{138}= 11.7</math>) counts per hour. | ||
| + | |||
| + | The cosmic ray telescope counting experiment appears to be following Poisson statistics. | ||
| + | [http://www.iac.isu.edu/mediawiki/index.php/Statistics_for_Experimenters See Statistics for Experimentalists] | ||
Latest revision as of 21:42, 19 September 2007
| Angular Distribution | ||||||||
|---|---|---|---|---|---|---|---|---|
| Time Start | Time Stop | Time elapsed (min.; hour) | Thresholds on both Scintillators | Singles Count (on top) | Coinc. Counts | Coinc. per minute | Coinc. per Hour | Angle measure |
| 1:35 pm on 8/31 | 1:10 pm on 9/04 | 5725 min; 95.42 hr | 225 | 626816 | 1654 | .2889 | 17.33 | 75 degrees |
Cosmic rates measured each hour when the telecope accepts cosmics which intersect the earth's surface perpendicularly (defined as zero degrees).
| Time Start | Time Stop | Time elapsed (hour) | Singles Count (on top) | Coinc. Counts | Coinc. per hour | ||
| 1:20 pm | 2:20 pm | 1 | 5694 | 127 | 127 | 11.3 | 11 |
| 2:20 pm | 3:20 pm | 1 | 4896 | 136 | 136 | 11.6 | 2 |
| 3:20 pm | 4:20 pm | 1 | 4655 | 151 | 151 | 12.2 | 13 |
Mean = 138 counts per hour
Instrumental Uncertainty = counts per hour
The instrumental uncertainty is approximately equal to the Poisson sigma () counts per hour.
The cosmic ray telescope counting experiment appears to be following Poisson statistics. See Statistics for Experimentalists