Operating experience with chemical sensors at the CERN NA48 experiment

Oxygen adsorption on thin film sensors provides an effective tool for real-time control of the air content in the helium vessel in NA48 experiment at CERN

Helium purity control by thin film gas sensors at the NA-48 experiment at CERN

The authors have implemented a system for monitoring the purity of helium for the NA-48 experiment on high-energy physics at CERN. This measurement is important for correct execution of the experiment. A set of SnO2 sensors was used to the purpose for on-line information on helium purity within the required accuracy

Sub-ppm NO2 sensors based on nanosized thin films of Titanium-Tungsten oxides

We describe the preparation of thin films of Ti---WO3 obtained by means of r.f. sputtering deposition followed by a thermal oxidation. The sensing characteristics of these thin films were obtained by measuring the response towards NO2 in the interval 0.5–20 ppm and to other interfering gases like ethyl alcohol, CH4 and CO; the influence of water vapour to the response towards NO2 was also investigated. The material seems to be a promising detector of NO2for environmental monitoring