In this work, a closed type transverse excitation low pressure single laser channel system has been implemented. This implementation has been conducted to study the requirements, characteristics and performance of the N2 laser at low pressure. The electrodes are semicircular with the dimensions of (260mm length×20mm width×14mm thick×6mm diameter of electrode). The closed cavity is made from 14mm thick perspex with the dimensions of (290mm length×120mm width×60mm height). The N2 laser is provided with a power supply with maximum voltage 18 kV, direct current 180 mA, Blumlein capacitors 2.35 nF and 1.62 nF and a trigger circuit. The laser system has been experimented for discharge and laser output. It is operated under pressure of 10, 20, 30, 40, 50, 60, 70 and 80 mbar with maximum voltage of 18 kV. The effect of pressure on electric field, mean free path of free electrons, density of atoms and life time of upper energy level have been studied theoretically. The effect of discharge time of storage side capacitor and the current density on the thickness of discharge have been studied theoretically for different pressure and storage-side capacitor values of 0.84 nF and 3 nF with spark gap side capacitor values of 0.71 nF and 2.38 nF respectively. The above analysis has been implemented with aid mat lab7 version.