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Ageing in the LHCb outer tracker: Aromatic hydrocarbons and wire cleaning |
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| Authors: | N Tuning S BachmannY Bagaturia M BlomL Ceelie D van EijkCh Färber T HaasF Jansen T KetelM Merk I MousA Nawrot A PellegrinoO van Petten T du PreeN Serra E SimioniT Sluijk B StoraciM Szczekowski U UwerE Visser D Wiedner |
| Affiliation: | a Nikhef, Science Park 105, 1098 XG, Amsterdam, The Netherlands b Physikalisches Institut, Heidelberg, Germany c A. Soltan's Institute for Nuclear Studies, Warsaw, Poland |
| 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 Gas detectors Straw tubes Ageing Glue |
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