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采用基于燃料室和靶室独立控温的温度梯度法开展了冷冻靶微管可控充气技术研究。理论计算结合实验研究了不同尺寸靶球充气过程中温度梯度对燃料注入过程的影响。结果表明,充气结束时燃料室最终温度变化对燃料初始注入量的差值影响随靶球尺寸变化不明显,即通过温度梯度法实现燃料可控注入的途径对任何尺寸靶球均适用。随着靶球尺寸的增大,燃料在充气管处液化时所需温度梯度越小,燃料注入过程温度梯度控制范围越大,燃料注入量控制精度越高。对于内径2 mm的靶球、1.6mL燃料室,当燃料室温度升至75K时,燃料注入量控制精度达±3μm/K。这些结果为冷冻靶燃料高精度加载技术研究提供了重要基础。
The controllable aeration technology of cryogenic target microtubules was developed by the temperature gradient method based on the independent temperature control of fuel chamber and target chamber. Theoretical calculations combined with experimental study of different sizes of the target ball during the filling temperature gradient of the fuel injection process. The results show that the influence of the final fuel temperature change on the initial fuel injection amount does not change with the size of the target sphere at the end of the charging process. That is, the controlled injection of fuel by the temperature gradient method is suitable for any target sphere. With the increase of the size of the target sphere, the smaller the temperature gradient of the fuel liquefied at the inflation tube, the greater the temperature gradient control range of the fuel injection process and the higher the fuel injection amount control accuracy. For a target sphere with an inner diameter of 2 mm and a 1.6mL fuel chamber, fuel injection amount control accuracy is ± 3μm / K when the fuel cell temperature is raised to 75K. These results provide an important basis for the study of high-precision loading of cryogenic target fuel.