Термоядерная энергетика образца 2021 года
Dec. 5th, 2021 11:43 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
thagastanО ее состоянии и перспективах можно составить впечатление по свежей статье
In August, a fusion reaction at the National Ignition Facility yielded a record 1.3 MJ in fusion energy, releasing, for the first time, more energy than the fuel capsule absorbed.
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Until August of this year, no facility had achieved this ignition threshold. That changed on August 8th, with an upgraded experiment that yielded 1.3 MJ, which is about 8 times more energy than NIF’s previous record. Early reports referred to this breakthrough as the “brink of ignition,” because it yielded less than the 1.9 MJ supplied by the facility’s 192 laser beams. ... The argument for ignition is based on an accounting of losses in the energy delivery: Calculations show that only about 230 kJ of the laser energy reaches the fuel capsule. For Callahan, this last energy is the relevant one to consider, as it describes the heat coming in from outside. “We got out almost 6 times as much energy as we put into the capsule,” she says. “It’s a big accomplishment.” She adds that achieving ignition is “what I set out to do” in becoming a fusion scientist, “and we did it.”
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То есть, сжав 8 августа 2021 года лазерными лучами с энергией 1,9 МДж капсулу с дейтерий-тритиевой смесью, экспериментаторы разогрели ее до 100 млн градусов и получили реакцию синтеза с энергией в 1,3 МДж. Меньше, чем затратили. Но, поскольку до самой капсулы дошло только 230 КДж преобразованной энергии лазеров, то считается, что выход энергии в шесть раз больше, чем вход......
Until August of this year, no facility had achieved this ignition threshold. That changed on August 8th, with an upgraded experiment that yielded 1.3 MJ, which is about 8 times more energy than NIF’s previous record. Early reports referred to this breakthrough as the “brink of ignition,” because it yielded less than the 1.9 MJ supplied by the facility’s 192 laser beams. ... The argument for ignition is based on an accounting of losses in the energy delivery: Calculations show that only about 230 kJ of the laser energy reaches the fuel capsule. For Callahan, this last energy is the relevant one to consider, as it describes the heat coming in from outside. “We got out almost 6 times as much energy as we put into the capsule,” she says. “It’s a big accomplishment.” She adds that achieving ignition is “what I set out to do” in becoming a fusion scientist, “and we did it.”
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