Difference between revisions of "2n Position resolution"

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Experimental distribution of TDC difference time spectrum (blue) and ideal response function (red) are shown below:
 
Experimental distribution of TDC difference time spectrum (blue) and ideal response function (red) are shown below:
  
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[[File:sig_resp2.png | 600 px]]
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[[File:experimental_data_fit.png | 600px]]
  
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Raw data of FFT deconvolution of signal function and response function is presented below:
 
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[[File:FFT_sig_resp_deconv.png | 600 px]]
 
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It can be seen the high frequency noise component in the raw data. Applying low pass filtering we could get the deconvoluted data:
 
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[[File:FFT_sig_resp_deconv_filter.png | 600 px]]
 
  
 
Hence, any coordinate of the neutron hit has the following uncertainty in: sigma = 2.8 ns and its value converted into cm is 2.8 ns x 7.41 cm/ns = 20.7 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 = 2.8 ns and its value converted into cm is 2.8 ns x 7.41 cm/ns = 20.7 cm. The total length of the active area of the neutron detector is 75 cm.

Revision as of 16:26, 26 April 2013

FFT algorithm test

Convolution deconvolution stepFcn.png

If we take narrower response function we will get

Convolution deconvolution stepFcn2.png

FFT application

Experimental distribution of TDC difference time spectrum (blue) and ideal response function (red) are shown below:

Experimental data fit.png


Hence, any coordinate of the neutron hit has the following uncertainty in: sigma = 2.8 ns and its value converted into cm is 2.8 ns x 7.41 cm/ns = 20.7 cm. The total length of the active area of the neutron detector is 75 cm.

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