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SATURATED PULSE ANALIZE

SATURATED PULSE ANALIZE. Zhu Yuefeng, Yue Qian. Idea. Algorithm. Add lots of non-saturated pulses to get a big and smooth pulse(1) and normalize it Multiply the big pulse and a factor to get an pulse(2) with arbitrary peak value Cut the pulse(2) when its peak value is bigger than 255

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SATURATED PULSE ANALIZE

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  1. SATURATED PULSE ANALIZE Zhu Yuefeng, Yue Qian

  2. Idea

  3. Algorithm • Add lots of non-saturated pulses to get a big and smooth pulse(1) and normalize it • Multiply the big pulse and a factor to get an pulse(2) with arbitrary peak value • Cut the pulse(2) when its peak value is bigger than 255 • Get the area Qp of the cutted pulse and the area Qt of the relevent uncutted pulse • Draw a curve of Qp-Qt and fit it

  4. How to fit?

  5. How to fit? • Higher the order is, then better the accuracy will be • The beginning point of data will have the biggest error, so that not to start the fit when the pulse is just saturated • Then, how to reduce error?

  6. How to reduce error?

  7. How to reduce error? • Tow methods • High order • Seperate to two parts or more • And as said in front, not to begin fit just at the point you use the fit result

  8. Analyze the ratio of Cs-137's two peaks (662KeV & 32KeV) when most of the pulses at 662KeV is saturated seriously An Example

  9. An example

  10. Result

  11. New result Vs. Old result

  12. When fitting, we need to cut a pulse which is bigger 255. However, considering the ped should be subtracted from the pulse, then which one, 255-ped or 255 should be used to cut the pulse in the algorithm? 255-ped or 255?

  13. 255-ped or 255?

  14. How much difference

  15. In the example

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