KKddpp++==≈21360170..keVkeV. Consequently, the voltage needed to accelerate each deuteron from rest to that value of Kis 170 kV. (b) Not all deuterons that are accelerated towards each other will come into “contact” and not all of those that do so will undergo nuclear fusion. Thus, a great many deuterons must be repeatedly encountering other deuterons in order to produce a macroscopic energy release. An accelerator needs a fairly good vacuum in its beam pipe, and a very large number flux is either impractical and/or very expensive. Regarding expense, there are other factors that have dissuaded researchers from using accelerators to build a controlled
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