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Technicolor represents a viable alternative to the Higgs mechanism for generating gauge boson masses. Searches for technicolor particles ρ T and π T have been performed in the data collected by the DELPHI experiment at LEP at centre-of-mass energies between 192 and 208 GeV corresponding to an integrated luminosity of 452 pb −1 . Good agreement is observed with the SM expectation in all channels studied. This is translated into an excluded region in the (M π T , M ρ T ) plane. The ρ T production is excluded for all 90 < M ρ T < 206.7 GeV/c 2 . Assuming a point-like interaction of the π T with gauge bosons, an absolute lower limit on the charged π T mass at 95% CL is set at 79.8 GeV/c 2 , independently of other parameters of the technicolor model.

Design and physical operation principles of new microchannel avalanche photodiode (MC APD) with gain up to 10 5 and linearity range improved an order of magnitude compared to known similar devices. A distinctive feature of the new device is a directly biased p-n junction under each pixel which plays role of an individual quenching resistor. This allows increasing pixel density up to 40000 per mm 2 and making entire device area sensitive.

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