广发证券：核聚变项目国内外持续推进 有望超预期

Group 1 - Nuclear fusion is expected to become the ultimate energy source for humanity due to its rich energy potential, high energy density, zero emissions, and high fuel availability [2][4] - The technology is still in the laboratory stage, and commercial application requires further breakthroughs [1][3] - Significant investments in nuclear fusion are increasing globally, making it a competitive field among countries [4] Group 2 - The key indicators for measuring nuclear fusion reactions include the product of plasma temperature, atomic density, and confinement time, which must exceed a certain value for ignition [3] - The energy gain factor Q must be greater than 1 to achieve net fusion energy, indicating the feasibility of engineering technology [3] - The main technical routes for nuclear fusion research are magnetic confinement fusion and inertial confinement fusion, with tokamaks being the most widely studied and likely to achieve controllable fusion [5] Group 3 - The magnet system constitutes the largest cost component (28%) in the ITER experimental reactor, highlighting the critical role of superconducting technology [5] - High-temperature superconducting materials, such as REBCO, are expected to become significant components in nuclear fusion, providing stronger magnetic fields and reducing the size and cost of fusion reactors [5] - Companies involved in the development of superconducting materials and fusion technologies are likely to benefit as fusion projects progress [5]