A PRECISION TECHNIQUE FOR MOUNTING SCINTILLATING-FIBER RIBBONS FOR CHARGED-PARTICLE TRACKING

We have undertaken a research program to develop a Scintillating Fiber charged particle Tracking (SFT) detector for the DO upgrade experimen t at FNAL. We have developed a construction method utilizing scintilla ting fibers first accurately formed into ribbons, then precisely locat ing these ribbons on the inside and outside of a lightweight cylindric al base. A Coordinate Measuring Machine (CMM) is used to control each step of the ribbon mounting procedure. Ribbons 2m long, containing 255 fibers each have been placed on composite structures with accuracy si milar to 20 mu m. The technique for producing highly accurate fiber ri bbons and the method of precision placement of ribbons are presented. The spatial calibration of a charged particle tracker using the CMM me asurements are discussed.