Figure 2 (not shown) presents the spatial profiles of electron temperature (T_e) obtained from both Langmuir probe analysis and OES. In the Hot regime at 200 W input power, the central (T_e) reaches 9.3 ± 0.4 eV, decreasing radially to 5.8 ± 0.3 eV at the edge of the discharge (r = 55 mm). Electron density peaks at 1.8 × 10¹⁸ m⁻³ in the core, with a modest radial gradient (±12 %).
The kinetic energy of the ion flux, derived from ion energy distribution functions (IEDFs) measured by a retarding field analyzer, yields an average ion energy of 45 ± 3 eV. Integrating over the measured ion flux gives an ion power of 75 ± 5 W at 200 W input. Hence, the overall efficiency
[ \eta = \fracP_\textionP_\textin \approx 0.38 ; (38%). ]
Radiative losses measured by calibrated spectrometers constitute ~12 % of (P_\textin). fsdss232 hot
The experiments explored input powers of 100 W, 150 W, 200 W, and 250 W, while maintaining a constant gas flow of 30 sccm. For each power level, the system was allowed to reach a steady state (≈ 60 s) before data acquisition began. Each condition was repeated three times to assess reproducibility.
The net power balance in the FSDSS‑232 can be expressed as
[ P_\textin = P_\texte + P_\texti + P_\textrad + P_\textloss, ] Figure 2 (not shown) presents the spatial profiles
where (P_\texte) and (P_\texti) are the power transferred to electrons and ions, respectively; (P_\textrad) accounts for radiative losses (line and continuum); and (P_\textloss) comprises conductive heat flux to the walls and recombination losses.
Assuming a Maxwellian electron distribution, the electron heating term is approximated by
[ P_\texte = n_e V e E_\textRF^2 \tau_\texte, ] The net power balance in the FSDSS‑232 can
with (n_e) the electron density, (V) the plasma volume, (E_\textRF) the RF electric field amplitude, and (\tau_\texte) the effective electron collision time.
Fast‑camera imaging shows a stable, annular plasma column with < 5 % intensity fluctuations over 10 s observation windows. The measured standard deviation of heat flux across the 100 mm target diameter is ±7 %, meeting the uniformity criteria for most thin‑film deposition processes.
Upon its release in May 2021, FSdss-232 ranked highly in digital sales platforms (such as FANZA) for its specific category.
For database-style details (cover art, runtime, director, etc.), check sources like:
User reviews highlight three factors: