Temperature and humidity effect on the tracking accuracy. I.Kreslo LHEP University of BERN

Positions of three FM’s are repeatedly measured: I.Kreslo LHEP University of BERN

Plate always on the stage. Absolute Distance between two FMs I.Kreslo LHEP University of BERN

Plate always on the stage. Relative Distance between two FMs I.Kreslo LHEP University of BERN

Plate is taken and put back before each measurement. Absolute Distance between two FMs Temperature effect? I.Kreslo LHEP University of BERN

Let’s try to measure a temperature… Temp. sensor I.Kreslo LHEP University of BERN

Plate always on the stage. Absolute Distance between two FMs I.Kreslo LHEP University of BERN

Plate always on the stage. Absolute Distance between two FMs I.Kreslo LHEP University of BERN

10 plates a sequentially put onto the stage. Absolute Distance between two FMs Uncorrected Corrected I.Kreslo LHEP University of BERN

Best achievable accuracy. Absolute Distance between two FMs I.Kreslo LHEP University of BERN

Temperature is to be monitored in few points. Humidity too? Pre-Conclusions 1.5 orders of magnitude progress is possible in track position measuring accuracy. Temperature is to be monitored in few points. Humidity too? I.Kreslo LHEP University of BERN

Humidity sensor is installed I.Kreslo LHEP University of BERN