Institut de Physique et Chimie des Matériaux, CNRS and Université de Strasbourg, BP 43, F-67034 Strasbourg, France.
Phys Rev Lett. 2012 Dec 21;109(25):255005. doi: 10.1103/PhysRevLett.109.255005.
Non-neutral plasmas can be trapped for long times by means of combined electric and magnetic fields. Adiabatic cooling is achieved by slowly decreasing the trapping frequency and letting the plasma occupy a larger volume. We develop a fully kinetic time-dependent theory of adiabatic cooling for plasmas trapped in a one-dimensional well. This approach is further extended to three dimensions and applied to the cooling of antiproton plasmas, showing excellent agreement with recent experiments [Gabrielse et al., Phys. Rev. Lett. 106, 073002 (2011)].
非中性等离子体可以通过电场和磁场的组合来长时间捕获。通过缓慢降低捕获频率并让等离子体占据更大的体积，可以实现绝热冷却。我们为一维势阱中捕获的等离子体开发了一种全动力学、时变的绝热冷却理论。该方法进一步扩展到三维，并应用于反质子等离子体的冷却，与最近的实验结果[Gabrielse 等人，Phys. Rev. Lett. 106, 073002 (2011)]非常吻合。
