Ice fuel for a fusion reactor. Free Technical Library News

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Ice cold fuel for a fusion reactor

17.03.2020

Bombardment with pellets of frozen hydrogen proved to be more effective than injection of gaseous deuterium and tritium to operate a fusion reactor, physicists at Princeton University said.

Scientists conducted research on the DIII-D tokomak experimental thermonuclear facility. To bombard with frozen hydrogen granules, physicists built a special "ice gun" that fired them directly into the plasma. The traditional way of supplying fuel in the form of deuterium and tritium in a gaseous state reduced the temperature and density of the plasma. Whereas ice fuel did not cause such a negative effect.

Physicists believe that when gaseous portions of fuel are introduced, their flow is hindered by a specific reverse exhaust from the plasma layer surrounding the zone where thermonuclear reactions take place directly. When firing frozen pellets, the fuel was delivered to the desired zone without a plasma response.

In the conclusions of the study, scientists suggested that frozen water will become the most convenient and efficient fuel for future fusion reactors.

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