Difference between revisions of "October 16, 2008"
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NaI detector in place and working (used to measure the gamma flash). | NaI detector in place and working (used to measure the gamma flash). | ||
| − | + | Asymmetry was observed for <math>D_{2}O</math>: | |
| − | Asymmetry | + | <math>Asymmetry (%) = \frac{\left (\frac{A^{n,D_{2}O}_{up}}{N^{ref,D_{2}O}_{r}} - \frac{A^{n,H_{2}O}_{up}}{N^{ref,H_{2}O}_{r}} \right ) - \left (\frac{A^{n,D_{2}O}_{side}}{N^{ref,D_{2}O}_{r}} - \frac{A^{n,H_{2}O}_{side}}{N^{ref,H_{2}O}_{r}} \right )}{\left (\frac{A^{n,D_{2}O}_{up}}{N^{ref,D_{2}O}_{r}} - \frac{A^{n,H_{2}O}_{up}}{N^{ref,H_{2}O}_{r}} \right ) + \left (\frac{A^{n,D_{2}O}_{side}}{N^{ref,D_{2}O}_{r}} - \frac{A^{n,H_{2}O}_{side}}{N^{ref,H_{2}O}_{r}} \right )} * 100 |
| + | </math> | ||
| − | A^{n,D_{2}O}_{up} | + | <math>A^{n,D_{2}O}_{up}</math> is the number of neutrons/sec seen by the detector when placed above the <math> D_{2}O </math> target. |
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| + | <math>A^{n,D_{2}O}_{side}</math> is the number of neutrons/sec seen by the detector when placed to the side of the <math> D_{2}O </math> target. | ||
| + | |||
| + | <math>A^{n,H_{2}O}_{up}</math> is the number of neutrons/sec seen by the detector when placed above the <math> H_{2}O </math> target. | ||
| + | |||
| + | <math>A^{n,H_{2}O}_{side}</math> is the number of neutrons/sec seen by the detector when placed to the side of the <math> H_{2}O </math> target. | ||
| + | |||
| + | <math>N^{ref,D_{2}O}_{r}</math> is the number of neutrons/sec seen by the reference detector with the <math> D_{2}O </math> target. (The reference detector is beside the place of the side detector.) | ||
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| + | <math>N^{ref,H_{2}O}_{r}</math> is the number of neutrons/sec seen by the reference detector with the <math> H_{2}O </math> target. (The reference detector is beside the place of the side detector.) | ||
| + | |||
| + | Detector A Asymmetry: First run = -20.27%; Second run = -19.84% | ||
| + | |||
| + | Detector C Asymmetry: First run = -12.69%; Second run = -9.16% | ||
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| + | [[Image:Four_detectors_asymmetry.jpg | 500 px]] | ||
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| + | On the picture: 1D - timing spectrum taken by upper detector, 1C - timing spectrum taken by side detector, 1A - timing spectrum taken by side reference (being kept stationary) detector, 1B - NaI accelerator current monitor | ||
| + | |||
| + | [http://wiki.iac.isu.edu/index.php/October_Fission_HRRL_Measurements_2008 Go Back] | ||
Latest revision as of 06:31, 5 February 2009
NaI detector in place and working (used to measure the gamma flash).
Asymmetry was observed for :
is the number of neutrons/sec seen by the detector when placed above the target.
is the number of neutrons/sec seen by the detector when placed to the side of the target.
is the number of neutrons/sec seen by the detector when placed above the target.
is the number of neutrons/sec seen by the detector when placed to the side of the target.
is the number of neutrons/sec seen by the reference detector with the target. (The reference detector is beside the place of the side detector.)
is the number of neutrons/sec seen by the reference detector with the target. (The reference detector is beside the place of the side detector.)
Detector A Asymmetry: First run = -20.27%; Second run = -19.84%
Detector C Asymmetry: First run = -12.69%; Second run = -9.16%
On the picture: 1D - timing spectrum taken by upper detector, 1C - timing spectrum taken by side detector, 1A - timing spectrum taken by side reference (being kept stationary) detector, 1B - NaI accelerator current monitor