The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter D_p = 1.8 mm.
(a) Determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of P = 500 W. The pellet has an absorptivity α = 0.3 and emissivity ε = 0.8.
(b) The pellet is placed inside a cylindrical enclosure. Two laser entrance holes are located at either end of the enclosure and have a diameter of D_LEH = 2 mm. Determine the maximum temperature that can be generated within the enclosure.

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N = 200 laser beams (a) D = 1.8 mm DLEH = 2 mm N = 200 laser beams (b)