On detector related machine and instrumentation issues

This is a summary report of the panel discussions on detector related machine and instrumentation issues. Each of the panel members presented an introductory presentation of the following topics. Those are the three most revealing future experiments (by G. Kane), calorimetry for jets and total energy (by U. Amaldi), tracking and momentum (by R. Schwitters), identification of e, μ and other particles (by G. Wolf), trigger and data acquisition (by M. Breidenbach) and building large detectors in cooperation with industry (by S. Orito). In the discussion on the detectors at future large hadron colliders, much emphasis was given to calorimetric measurement, muon measurement, and microvertex detection. There is a need for inexpensive and radiation-hardened front-end electronics for all detectors. As to data acquisition and analysis, the use of a sequence of successive trigger levels with a large number of emulators (of the order of 100) in the last stage and the use of optical discs for data storage would be needed at the highest luminosity. It is clear that the development of the instrumentation technique mentioned constitutes a prerequisite for the efficient use of future large hadron colliders. When considering the detectors for future large positron-electron colliders, some of the technical problems mentioned were drastically simplified, in particular those related to the high collision rate like signal pile-up, radiation damage and fast data processing. (Kato, T.)