Measurement of the energy flow in a large $\eta$ range and forward jets at LHC at $\sqrt{s} =$ 0.9 TeV, 2.36 TeV and 7 TeV

A measurement is presented for the energy flow of minimum bias events in the forward region (3.15 $< \mid\eta\mid <$ 4.9, where $\eta$ is the pseudorapidity) of the CMS detector at the LHC for center-of-mass energies $\sqrt{s} =$ 0.9 TeV, 2.36 TeV and 7 TeV. The measurement is compared to Monte Carlo simulations, which use a model of multiparton interactions for the underlying event. In addition, production of forward jets was studied for the very first $pp$ collisions at $\sqrt{s} =$ 0.9 TeV at LHC.