1：Experimental Design and Method Selection:

The study involved processing polycarbonate detectors of various sizes (small, medium, mega-size) in electrochemical etching (ECE) chambers using the 50 Hz-HV method to analyze alpha particle detection. The rationale was to assess the effects of detector area and field strength on detection uniformity.

2：Sample Selection and Data Sources:

500 μm thick polycarbonate detectors of sizes 3×3 cm2, 19×19 cm2, 24.6×24.6 cm2, and 38×38 cm2 were used, with effective areas of 2×2 cm2, 17×17 cm2, 22.6×22.6 cm2, and 33×33 cm2 respectively. Alpha particles from an 241Am source with energies from ~0.3 to ~3.0 MeV and a fluence of ~1.0×10? alphas·cm?2 were employed.

3：6×6 cm2, and 38×38 cm2 were used, with effective areas of 2×2 cm2, 17×17 cm2, 6×6 cm2, and 33×33 cm2 respectively. Alpha particles from an 241Am source with energies from ~3 to ~0 MeV and a fluence of ~0×10? alphas·cm?2 were employed. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: ECE chambers (self-designed and constructed), 50 Hz-HV generator (homemade), high voltage probe, etchant solution (15 g KOH + 40 g C?H?OH + 45 g H?O), light microscope, surface barrier detector coupled to a multichannel analyzer for calibration, brass collimator for alpha exposure.

4：Experimental Procedures and Operational Workflow:

Detectors were exposed to alpha particles at specific positions using a collimator. ECE processing was done at 26°C for 6 hours with optimized etchant. Applied voltages varied (e.g., 2 kV, 3 kV, 4 kV) to achieve different field strengths. Track density and diameter were measured under a light microscope.

5：Data Analysis Methods:

Detection efficiency was calculated as (track density / alpha fluence) × 100. Mean track diameters were measured. Data trends were analyzed, and voltage compensation factors (Vc) were determined using Origin software for curve fitting.