Development of the InLightTM Monitoring Service for World-wide Application

This paper describes the development of a new type of personal radiation dosimeter that combines the excellent features of optically stimulated luminescence (OSL) with the convenience of Panasonic type readers. The specification required for the badge in world-wide application is first discussed. The dosemeter is a Panasonic type dosemeter with OSL detectors replacing the thermoluminescence dosemeters (TLDs). The readers are modified, principally by using a LED array as the light source. Thus, we have been able to use an extensively tried and tested system with the minimum of modifications. The readers are computer controlled and can recognise the type of badge being read and the sensitivity of the OSL detectors. Two different badges have been developmened to meet the requirements for the American and European markets. The model 1 badge comprises an open window and filters of plastic, copper and lead. A linear algorithm is being developed for this badge. The model 2 badge comprises an open window and filters of plastic, copper and aluminium. The algorithm developed for this badge is function-based (branching). A full programme of type testing the badges has been undertaken. The newly developed system will enable us to expand the service options available to our customers. These will range from full service (supply of badges periodically to customers, receipt and readout through to record keeping) through to supply of equipment, badges and support so that customers can run their own in house service using OSL technology badges.