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The design and assembling procedure of a precision drift tube housed in a Mylar pipe are described. The technology for manufacturing drift tube bodies from a 125 μm thick Mylar film with an alu minum coating evaporated on both sides of it is introduced. The test procedures and results demonstrating the performance characteristics of the drift tubes are presented.

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The design of a drift chamber composed of three layers of thin walled (0.125 mm) precision Mylar tubes is described. Twenty six chambers of this type with areas from 1 × 1 to 2.5 × 2 m 2 comprising 4392 drift tubes have been produced for experiments at the 70 GeV accelerator at the Institute for High Energy Physics. The chamber design, the assembling procedure, and test results are presented.

A structure of the data acquisition and control system (DAQC) in the MISS electronics standard for a multichannel detector on drift tubes is described. Its special feature is the use of the specialized LE 83 controller for communications with the computer and LE 83T controller-timer, which fulfills off line all functions of storing data in its inner memory buffers in real time without an obligatory external trigger launching signal. The rewriting of stored data from the buffer into the computer memory and their transmis sion via the local network occur periodically in program specified time intervals. The received data are pro cessed on line to control the equipment, alert, if a fault is detected, and produce physical results directly to the operator, who interacts with the system through the graphic interface with a possibility of the setup con figuration. The system is built as a set of interacting processes, which can operate both on one computer or be distributed on several computers (within the frameworks of the local network).