EXP2003 » EXP2003: Express analysis

The first layer of side telescope was calibrated using parameters provided in task 445. The second layer was not calibrated and data in ADC channel units were used for analysis. The inhomogeneity of the thickness of the first thin layer was not taken into account.

Time-amplitude selection for all strips of each detector was used

• thin detector: (-200;-100) ns;
• thick detector: (590;630) ns;

where time was calculated as

tau(i) = tau(strip_i) - tau(F5).

The amplitude was not selected. Typical examples of selection are below.

Typical examples of the time-amplitude correlations for individual strips. Upper row - thin detector. Lower row - thick detector. X-axis - tau(i) in nanoseconds. Y-axis amplitude measured in a strip in MeV for a thin detector and in ADC channels for the thick detector.

We employed a selection for time and use the multiplicity of time-amplitude pairs equal to one for each layer and we get a relatively clean ID plot where particular isotopes of He and Li may be distinguished.

Identification plot for side telescope. Above mentioned time cuts were used. The white rectangle represents a region related to the energy deposit of beam particles. This part was excluded to make color representation more readable.