| 摘要 |
PURPOSE:To improve space resolving power, by subtracting the result of addition corresponding to the noise components extracted from the outputs of photoelectric transducers added according to a certain specified rule. CONSTITUTION:PMTs 13 which are many photoelectric transducers are arranged behind a scintillator 11 via a light guide 12. The respective outputs of the PMTs 13 are introduced respectively through a preamplifier 14 to an adder 15, an amplifier 16 for extracting noise components and a calculation circuit 19 for energy. The outputs contg. many noise components of the PMTs 13 are extracted by passing the outputs through the amplifier 16. The respective noise components are added for each row and column in an adder 17. The added signals of the noise components in the respective rows and columns are subtracted respectively in a subtractor 18. The signals are fed to a calculation circuit 20 for position which calculates the position and devides the same by the energy signal Z outputted from the circuit 19 thereby normallizing the same. |
