In the case of angled track we expect significant charge sharing, and thus, much better resolution performance than in the case of perpendicular tracks. Moreover, during run of the LHC machine, only such tracks will be observed. The η variable versus fractional distance, resolutions, residuals distributions and fractions of the cluster for different incident particle angle will be presented below. In order to study of the performance of the VELO simulation package several samples of muon events have been generated. Each one consists of 25000 μ tracks. In the case of generation, particle every time intercepts the surface of the sensor at given θ angle so to reproduce the beam test conditions we decided to decrese angle of the generated particle about 30% for each sample. For example if we refere to θ=2^o it means sample with particles generated at angle θ_gen=1.4^o (for the generated samples angle θ is then an 'effective' angle).

        

η variable versus fractional distance: θ=2^o and θ=5^o.

        

η variable versus fractional distance: θ=7^o and θ=10^o.

        

Resolution versus pitch for: θ=2^o and θ=5^o.

        

Resolution versus pitch for: θ=7^o and θ=10^o.







Evolution of the residuals in θ angle - top row contains residuals for all clusters for θ=5^o, 7^o and 10^o respectively, the middle one contains residuals for one strip clusters while the bottom for two strips clusters.