Short course on the temperature detector system

In the SLAC linac, a slow temperature rise may occur from the continuous scraping of the beam on the vacuum chamber wall. In places where this is likely to occur, surface temperature sensors are mounted on the outside of the vacuum chambers and are arranged to trip the beam if the temperature exceeds a preset level. In addition to vacuum chamber surface temperature measurements, water temperature measurements are made on the cooling water supply and return line of slits, collimators, water cooled vacuum chambers, and dumps. A discussion was given of: (1) temperature sensors; (2) temperature detector and card types; (3) digital temperature readout; (4) detector card calibration; (5) line resistance equalization; and (6) operational and maintenance problems.