ELECTROSCOPE IONIZATION CHAMBER

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ELECTROSCOPE IONIZATION CHAMBER Radiation Detectors ELECTROSCOPE IONIZATION CHAMBER The gold-leaf electroscope has been widely used in the past to study ionizing radiation. EO 2.5 DESCRIBE the operation of an electroscope ionization chamber. The gold-leaf electroscope has been widely used in the past to study ionizing radiation. The first measurement of the properties of ionizing radiation was accomplished with this instrument. A microscope containing a graduated scale in the eyepiece is used to observe the gold leaf. The newest electroscope utilizes a quartz fiber and has many advantages over the gold-leaf type. It is portable, less dependent on position, much smaller in size, and more sensitive. The capacity of the quartz fiber electroscope is about 0.2 pico-farads, and its voltage sensitivity is about one volt per division on the scale. The sensitive element is a fine gold plated quartz fiber mounted on a parallel metal support. Figure 22 illustrates a quartz fiber electroscope. Figure 22 Quartz Fiber Electroscope IC-06 Page 40 Rev. 0

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