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Primary-barrier transmission B

B = 0.00006000

B=Pd2WUT,nTVL=log10(1/B)B=\frac{P\,d^2}{WUT},\quad n_{\mathrm{TVL}}=\log_{10}(1/B)

B = P d² / (W U T). Then n_TVL = log₁₀(1/B).

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