Title :
Bargain basement bakeout [IUCF Cooler Ring vacuum chamber]
Author :
Manwaring, William ; Noe, Shannon ; Sloan, Terry
Author_Institution :
Cyclotron Facility, Indiana Univ., Bloomington, IN, USA
Abstract :
The design goal of the project described was to develop a modestly priced system capable of reliably baking the 87-m IUCF (Indiana University Cyclotron Facility) Cooler Ring vacuum chamber to 250°C. Digital-to-analog converters provide the seek command to proportional controllers; these controllers drive solid-state relays which in turn drive 110 VAC coaxial heating coils. Thermistors (not thermocouples) provide feedback to the controllers and readouts to the PC through a commercial 200-channel analog-to-digital converter interface. Insulation is provided by a combination of ceramic paper and ceramic wool. Average vacuum achieved to data is 2.0 ntorr. Total system cost is about $35k
Keywords :
cyclotrons; vacuum apparatus; 250 degC; 87 m; IUCF Cooler Ring vacuum chamber; Indiana University Cyclotron Facility; analog-to-digital converter interface; bakeout; ceramic paper; ceramic wool; coaxial heating coils; digital-to-analog converters; feedback; proportional controllers; seek command; solid-state relays; thermistors; Ceramics; Coaxial components; Cyclotrons; Digital relays; Digital-analog conversion; Heating; Proportional control; Solid state circuits; Temperature control; Vacuum systems;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73188
