Nonirradiated and irradiated ATLAS silicon microstrip barrel and endcap modules have been beamtested with 4-GeV/c pions. Pulse shapes confirmed the peaking time of the amplifier to be 22 ns with slight deterioration in the irradiated modules. Median charges saturated around 3.8 fC, both in the nonirradiated and the irradiated modules. Signal/noise ratios, using the noise estimates from the in-situ calibration, were 16 in the nonirradiated ( 150 V) and 10 in the irradiated ( 300 V) barrel modules. No excess common-mode noise was observed.Index Terms-Radiation damage effects, silicon microstrip radiation detectors.

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An excellent cavity ring-down spectroanalyzer was realized using a reflective semiconductor optical amplifier. A negative feedback optical amplification effect of the amplifier recovers signal loss to a higher definition and provides an output signal whose baseline was reduced optically. A sample cell was formed to meet fibers in the face. 0.5% -16% saccharose solutions were analyzed by the spectroanalyzer with 1512 nm leaser.

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