| Popis: |
The evolution of a technique for precise and highly efficient time-of-flight measurements of minimum-ionizing particles is described. The technique is based on the use of parallel-plate chambers operating in the avalanche mode of gas amplification. The search for the proper material and design for the detector, the choice of the gas mixture composition, the results from the investigation of the gas discharge in the chamber, and the probability of a spark discharge are discussed, along with the development of fast and low-noise electronics.By optimizing the parameters of a parallel-plate chamber, a simple, reliable, and low-cost time-of-flight detector with a resolution of ∼200 ps and an efficiency of 90% or higher for minimum-ionizing particles was developed. |
