What follows is drawn essentially from the first 19 ILL Annual Reports. The text in blue is additional commentary to the annual report information.
Purchase of 3 As-Ge diode controllers (1.5 T 300) and launch of the manufacture of 10 others.
Realisation that the ILL temperature controllers were not up to the scientists' requirements.
Design of an initial prototype in collaboration with the SCIAD (Service de Contrôle des Instruments et d'Acquisition des Données). The Annual report gives no details on the technology chosen.
Project started on an independent microprocessor-based controller or controlled by the instrument, with automatic temperature control.
Microprocessor-based controller: prototype almost ready. The silicon diode sensors on 51 cryostats are replaced by carbon and platinum resistors.
Testing the first series of 6 microprocessor controllers. They could handle all types of temperature measurement (metal film resistors, semi-conductors, thermocouples) and were therefore potentially compatible with the furnaces.
Delivery of 10 controllers:
Several labs in France, Germany and Denmark request these devices.
29 controllers in service. Development of furnace control underway. Prototype available for the automatic control of the cryostats' cold valves. A pre-series of 5 soon to be tested.
Construction under licence of the high-precision temperature controller (PTC).
Design and development of the new ILLSEC (ILL Sample Environment Controller)