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Gas-Filled Detectors
| Content Provider | Scilit |
|---|---|
| Author | Tsoulfanidis, Nicholas Landsberger, Sheldon |
| Copyright Year | 2015 |
| Description | A typical gas-filled detector* has a capacitance of about 50 pF, and the charge will be collected in a time of the order of 1 μs. If all the charge created by the 3-MeV particle is collected, the voltage and current expected are of the order of V Q C i Q t = ≈ × × × ≈ × ≈ = ≈ × 10 1 6 10 50 10 0 5 10 0 5 . . .C/el F V mV 1 6 10 10 1 6 10 19 6 8. .× ∼ × −A A with both values well within our measuring ability with standard instruments. In an ionized gas without an electric field, electrons and positive ions will move at ran- dom with an average kinetic energy equal to (3/2) kT, where k = Boltzmann constant and T = temperature of the gas (kelvin). When an electric field is present, both electrons and positive ions acquire a net velocity component along the lines of the electric field. Electrons move toward the positive electrode; positive ions toward the negative one. e force on either charge carrier is the same and is equal to F = Ee, where E = electric field intensity, but the acceleration is quite different. e acceleration a is equal to F/M, where M is the mass of the ion or electron. erefore, the acceleration of an electron will be thousands of times larger than the acceleration of an ion. e time it takes the electrons to reach the positive electrode of a typical detector is about 1 μs. e corresponding time for the positive ions is about 1 ms, a thousand times longer. Book Name: Measurement and Detection of Radiation |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2015-0-60101-X&isbn=9780429194412&doi=10.1201/b18203-12&format=pdf |
| Ending Page | 225 |
| Page Count | 30 |
| Starting Page | 196 |
| DOI | 10.1201/b18203-12 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2015-04-24 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Measurement and Detection of Radiation Nuclear Energy and Engineering Charge Acceleration Electric Filled Thousands Typical Detector |
| Content Type | Text |
| Resource Type | Chapter |
