Author/Authors :
Tuning، نويسنده , , N. and Bachmann، نويسنده , , S. and Bagaturia، نويسنده , , Y. and Blom، نويسنده , , M. and Ceelie، نويسنده , , L. and van Eijk، نويسنده , , D. and Fنrber، نويسنده , , Ch. and Haas، نويسنده , , T. and Jansen، نويسنده , , F. and Ketel، نويسنده , , T. and Merk، نويسنده , , M. and Mous، نويسنده , , I. and Nawrot، نويسنده , , A. and Pellegrino، نويسنده , , A. and van Petten، نويسنده , , O. and du Pree، نويسنده , , T. and Serra، نويسنده ,
Abstract :
The LHCb Outer Tracker straw tubes have shown to suffer from gain loss after irradiation in the laboratory at moderate intensities. Under irradiation an insulating layer is formed on the anode wire. The ageing is caused by contamination of the counting gas due to outgassing of the plastifier di-isopropyl-naphthalene in araldite AY103-1 used at construction. This paper presents irradiation results with and without the plastifier, together with the mass spectra of the glue samples. In addition, the effects of wire heating and large currents are presented.
Keywords :
Tracking detectors , Straw tubes , ageing , Glue , Gas detectors
