lecture_2_F11 - First Laboratory The goal of the this weeks...

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First Laboratory The goal of the this week’s lab (Nuclear Electronics) is to become familiar with some of the electronic units you will use during the quarter We begin with studying the propagation of fast pulse in a coaxial cable and the importance of properly terminating the cable in its characteristic impedance (see lecture 1). In doing this we will learn how to use the analogue oscilloscopes and the various connectors that make connections of cables to various electronic modules “easy” You will also learn how to use a discriminator, which is a device that allows you to select or anti-select incoming pulses only if they are above a minimum threshold that can be set externally The lab also will allow you to use a coincidence unit which allows us to choose if two or more signals arrive in time coincidence October 6, 2011 Henry Lubatti 1
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October 6, 2011 Henry Lubatti Physics 433 - Lecture 2 Fast negative NIM logic modules used in the lab Fast NIM logic units all use –0.8 volt signals when properly terminated in 50 ohms; improper termination may lead to incorrect voltages to NIM inputs and bad results Read W.R. Leo Ch. 12 for a detailed discussion of NIM standard The most common NIM logic units found in the lab include Discriminators used to interface pulses from detectors and output a NIM standard pulse – see W.R. Leo Ch. 12 (Lab 0) Logic units allow for “and” (coincidence), “or” and “majority” logic operations on NIM pulses (Lab 0) Pulse generator Discriminator Coincidence unit CAMAC Crate 2
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Henry Lubatti Physics 433 – Lecture 2 Other NIM modules you will encounter later in the lab TAC (time to amplitude converters), used in later labs, provide an output pulse with voltage proportional to the time difference between a “start” and “stop “ pulse (Muon life time) Gate generators are used to provide gates and introduce delays if needed During the quarter you will have an opportunity to use many of these units In this weeks lab you will study at some of the properties of discriminators and coincidences circuits. 3
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This note was uploaded on 01/28/2012 for the course PHYSICS 433 taught by Professor Henrylubatti during the Fall '11 term at University of Washington.

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lecture_2_F11 - First Laboratory The goal of the this weeks...

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