For a inertial fusion energy plant, you need to do that about 10 times per second. The temperature is needed actually to overcome the repulsive forces that normally prevent nuclei in atoms from basically combining with each other. So there's an incredible force that prevents you from molecules from fusing. You need to have incredible temperatures in order to start creating violent collisions between the atoms.
How did we achieve nuclear fusion? Neil deGrasse Tyson and comedian Chuck Nice learn about thermonuclear fusion, the world’s most powerful lasers, and harnessing nuclear power with operations manager at The National Ignition Facility, Bruno Van Wonterghem.
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Photo Credit: U.S. Department of Energy from United States, Public domain, via Wikimedia Commons
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