Write the principle of working of hydrogen bomb. How is hydrogen bomb accomplished?

Working of hydrogen bomb: 

When two light nuclei like hydrogen or it's isotopes combine to form a heavy nucleus undergoing the process of fusion, a tremendous amount of energy is released. Hydrogen bomb is based on thermonuclear fusion reaction. 

The reaction is as follows:

²H + ²H → ³He + n + energy 

Degree of temperature and pressure required for the process is really high. The conditions are different.

An atomic bomb based on fission of uranium or plutonium is placed at the core of the hydrogen bomb. When atomic bomb is detonated, the temperature of the substance is raised to 10⁷ K in micro seconds. The high temperature gives sufficient energy for the hydrogen nuclei to fuse and release enormous amount of energy which causes destruction.

(i) Isotopes of Uranium: ₉₂U²³⁵; ₉₂U²³⁷; ₉₂U²³⁸.

(ii) ₉₂U²³⁵ is used tor nuclear reaction.

(iii) Criticality of a nuclear reaction implies fission process is so controlled that a manageable constant power output is obtained. 

The factors that should be counted for choosing source of energy are:

(i) Ease of extracting energy from the source and its transportation. 
(ii) Extracting the source is economical. 
(iii) The efficiency of technology available. 
(iv) The environmental damage caused by using that source.