THE ANALYTICAL LABORATORY FOR THE JET ACTIVE GAS HANDLING-SYSTEM - INACTIVE COMMISSIONING

The Analytical Laboratory (AN) of the JET Active Gas Handling System ( AGHS) is a central facility of the AGHS connected via small bore tubes to the other AGHS sub-systems. It offers various techniques such as g as chromatography, mass spectrometry, ionisation chambers, katharomete rs and calorimetry, to characterise the various gas samples. The detec tion ranges of the gas chromatograph far the six hydrogen molecules, h elium, nitrogen and oxygen are from about 100ppm to 100% and for metha ne, higher hydrocarbons, CO and CO2 from about 10ppm to 100% with a th ermal conductivity detector and a flame ionisation detector, respectiv ely. Similar detection ranges can be achieved with the quadrupole and omegatron mass spectrometers. In addition tritiated hydrogen and hydro carbons will be detected with flow proportional counter detectors and ionisation chambers down to the low ppm range. Inactive commissioning results will be presented.