  Based on ideas due to Scovel-Weinstein, I present a general framework for
constructing fluid moment closures of the Vlasov-Poisson system that exactly
preserve that system's Hamiltonian structure. Notably, the technique applies in
any space dimension and produces closures involving arbitrarily-large finite
collections of moments. After selecting a desired collection of moments, the
Poisson bracket for the closure is uniquely determined. Therefore data-driven
fluid closures can be constructed by adjusting the closure Hamiltonian for
compatibility with kinetic simulations.
