Debye length squared is scanned across scale and density ratios. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Shielding length squared is scale divided by density

The checked source keeps density six and scale squared eighteen, so lambda squared is three square meters.

λ2=186=3\lambda^{2}=\frac{18}{6}=3
Debye square sourceScale squared and density ratio are checked.sourcefieldsource=6 Cresponse=-4 Cvisible=2 Cscale2=18 m^2density=6lambda2=3 m^2

Density and scale pull lambda squared in opposite ways

The first two rows hold scale fixed while density rises. The last row raises scale at the same density.

scale sqdensityλ sq123412621863\begin{array}{c|c|c}\text{scale sq}&\text{density}&\lambda\text{ sq}\\12&3&4\\12&6&2\\18&6&3\\\end{array}
Debye length trade scanThe final row is the checked source diagram.sourcefieldsource=6 Cresponse=-4 Cvisible=2 Cscale2=18 m^2density=6lambda2=3 m^2