lab8_geiger_counter

lab8_geiger_counter - PHY 252 Lab 8 Gas particle detectors...

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PHY 252 Lab 8: Gas particle detectors Fall 2009 This experiment has two main objectives. First, we will become familiar with the characteris- tics of the Geiger-M¨uller (GM) tube, including the properties of threshold, starting and operating voltages, GM plateau region and plateau slope. Then we will use the GM tube to perform a simple statistical experiment for the purpose of studying some of the techniques of statistical analysis. 1 Apparatus The basic GM circuit diagram is shown in Fig. 1. The power supply and counter are one unit. The GM tube itself consists of a cylindrical outer shell which serves as a cathode and is on ground potential. In the center it has an axially mounted wire serving as an anode. The cylinder is filled with an inert gas (typically Argon) at low pressure plus a small amount of “quenching” gas (e.g. ethyl alcohol). A DC power supply provides a voltage across the tube in the range of a few hundred to over a thousand Volts depending on the requirements of the particular tube. Caution: The front window
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This note was uploaded on 05/28/2011 for the course PHY 251 taught by Professor Rijssenbeek during the Fall '01 term at SUNY Stony Brook.

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lab8_geiger_counter - PHY 252 Lab 8 Gas particle detectors...

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