SOLAR SYSTEM

Detailed explanation-1: -Nuclear fusion is possible only at high temperature and pressure. Nearly, a temperature of 107 K is required to initiate a nuclear fusion by overcoming the electrostatic repulsion between the nuclei. In a fusion reaction, two lighter nuclei combine to form a heavier nucleus.

Detailed explanation-2: -Nuclear fusion requires high temperature because a high temperature (100 million Kelvin) is needed for hydrogen atoms to have enough energy to surpass the resistance that two positive protons release. Protons have a positive charge and move away from each other when they get close.

Detailed explanation-3: -The temperature must be hot enough to allow the ions of deuterium and tritium to have enough kinetic energy to overcome the Coulomb barrier and fuse together. The ions must be confined with a high ion density to achieve a suitable fusion reaction rate.

Detailed explanation-4: -On Earth, to produce net power, fusion reactions must take place at very high temperatures of at least 100 million degrees, which is some seven times hotter than the centre of the Sun. At these very high temperatures the fusion fuel turns into a plasma.

Detailed explanation-5: -In fusion’s case the pressure is in a plasma unlike air where it is in a gas, but the principle holds the same way. Thus, high pressures (>2atm) and temperatures (>50 million degrees, several times hotter than the center of the sun) are required to obtain fusion reactions in a magnetic confinement device.