Professor Beg is an expert in Z-pinch discharges and the interaction of very high power laser pulses with matter, and has been active in developing pulsed x-ray and neutron sources. Beg has been studying the x-ray emission from a large array of wires placed in form of cylinder (each wire with diameter 1/50th of human hair). The array emits x-rays when a one million ampere current passes through in a fraction of a millionth of a second. He has studied several parameters that can affect the x-ray pulse. Presently, he is also engaged in the study of ultrahigh power interaction with matter. He uses 0.5 petawatt (i.e. 0.5 quadrillion watts) laser for these experiments.