Lecture11 - ENU 4612C/5615C Nuclear Radiation Detection and...

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ENU 4612C/5615C Nuclear Radiation Detection and Instrumentation Lecture 10 Electronics and Pulse Processing (2)
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Electronics and Pulse Processing 1. Pulse transmission and shaping 2. Linear and logic pulse functions 3. Pulse pile-up and rejection 4. Multichannel pulse analysis
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Electronics and Pulse Processing Pulse Transmission and Shaping – CR-RC Output Pulse Shape (for step input of amplitude E) τ = = 2 1 time E E out
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Electronics and Pulse Processing Pulse Transmission and Shaping – Gaussian Shaping or CR-(RC) n One stage of CR differentiation followed by “n” stages of RC integration For equal time constants τ throughout: τ n t out E / t n out e t E E =
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Electronics and Pulse Processing Pulse Transmission and Shaping – Gaussian Shaping Advantages Advantages of Gaussian shaping compared with CR-RC shaping with same peaking time: Faster return to baseline (less pileup) Somewhat better s/n ratio for isolated pulses
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Electronics and Pulse Processing Pulse Transmission and Shaping – Active Filter Pulse Shaping Replace CR differentiator with high-pass filter employing active circuit elements – Transistors and Diodes Replace RC integrator with active low-pass filter Many new nuclear instrument electronic circuits use transistors and diodes to provide Gaussian shaping
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Electronics and Pulse Processing Pulse Transmission and Shaping – Pole Zero Cancellation Finite decay of preamp pulse t t pz R No pz R out E adjusted properly R With pz R C t out E in E
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Electronics and Pulse Processing Pulse Transmission and Shaping – Baseline Shift Baseline shift Random Pulses Periodic Pulses:
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This note was uploaded on 12/10/2011 for the course ENU 4612c taught by Professor Ghita during the Fall '11 term at University of Florida.

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Lecture11 - ENU 4612C/5615C Nuclear Radiation Detection and...

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