Normalized emittance
= Normalized emittance
{title2=$\epsilon_n=\beta_{\rm rel}\gamma_{\rm rel}\epsilon$}
The <geometric emittance> multiplied by the relativistic velocity and Lorentz factor. For paraxial acceleration without dilution, this is proportional to transverse canonical <phase space>[phase-space] area and remains constant. Thus <geometric emittance> decreases approximately as inverse beam <momentum>.