Time-of-Flight Measurement in the DZero Central Fiber Tracker.

Estrada, J. ; Carcia, C. ; Hoeneisen, B. ; Rubinov, P.

Technical Information Center Oak Ridge Tennessee

关键词: Photons;    Fibers;    Evaluation;    Luminosity;    Photoelectrons;   

RP-ID  :  DE2004820413

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We continue evaluation of the new electronics developed for the Central Fiber Tracker and Preshower detectors. With the custom TriP chip and MCM II we have measured the position of the hits along the fiber by comparing the time of arrival of the photons at the VLPC with the expected timming relative to the beam. The measured rms resolution at the center of the fibers is 46cm for hits with more than 8 photo-electrons and is dominated by the statistics of photon arrival time. The corresponding resolution near the ends of the fibers (where more photoelectrons are collected) is calculated to be of order 27cm. With a second submission of the TriP chip to add the time-of-flight measuring capability we will effectively double the number of channels in the central fiber tracker.