Difference between revisions of "2n Position resolution"
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[[File:deconv_data_fit.png | 600px]] | [[File:deconv_data_fit.png | 600px]] | ||
| − | As can be seen the gaussian fit parameter "w" is equal to the parameter "Sigma3" of my_fcn fit of the experimental data. Hence fitting the experimental data with my_fcn one can get the position resolution of the detector. | + | As can be seen the gaussian fit parameter "w" is equal to the parameter "Sigma3" of my_fcn fit of the experimental data and also "xc" is equal to "M3". Hence fitting the experimental data with my_fcn one can get the position resolution of the detector. |
Hence, any coordinate of the neutron hit has the following uncertainty in: sigma = 2.139 ns and its value converted into cm is 2.129 ns x 7.24 cm/ns = 15.4 cm. The total length of the active area of the neutron detector is 75 cm. | Hence, any coordinate of the neutron hit has the following uncertainty in: sigma = 2.139 ns and its value converted into cm is 2.129 ns x 7.24 cm/ns = 15.4 cm. The total length of the active area of the neutron detector is 75 cm. | ||
Revision as of 21:56, 1 May 2013
FFT algorithm test
If we take narrower response function we will get
FFT application
Experimental distribution of TDC difference time spectrum (dots) and gaussian fit of the data (line) are shown below:
The fit of the experimental data with a function which is the result of convolution of the detector resolution function and detector response function is shown below
As can be seen the gaussian fit parameter "w" is equal to the parameter "Sigma3" of my_fcn fit of the experimental data and also "xc" is equal to "M3". Hence fitting the experimental data with my_fcn one can get the position resolution of the detector.
Hence, any coordinate of the neutron hit has the following uncertainty in: sigma = 2.139 ns and its value converted into cm is 2.129 ns x 7.24 cm/ns = 15.4 cm. The total length of the active area of the neutron detector is 75 cm.