具有各种吸收体的所有相空间平面中的电离冷却，包括表面吸收体
Ionization Cooling in all Phase Space Planes with Various Absorber Shapes, Including Parallel-Faced Absorbers
摘要：
直线束流中的电离冷却降低了束流的横向发射度，而对纵向发射度的影响很小（通常，实际上，它增加了纵向发射度）。一旦光束线弯曲，色散的引入在横向和纵向平面之间产生耦合。如果适当地处理这种耦合，则可以在所有三相空间平面中实现冷却。这通常通过在存在色散的区域放置楔形吸收体来实现。我将证明使用本征值分析，有其他配置的分散体和吸收体的形状，将实现电离冷却在所有的相空间平面。特别是，我将表明，一个甚至可以实现冷却在所有的相平面与平行面对吸收体在色散自由区域。我将使用微扰理论来近似由于纵向-横向耦合引起的冷却速率的变化。然后，我将描述如何通过将“纵向”本征模投影到横向平面中来理解纵向振荡的冷却。
英文摘要：
Ionization cooling in a straight beamline reduces the transverse emittance of a beam, and has little effect on the longitudinal emittance (generally, in fact, it increases the longitudinal emittance). Once the beamline bends, the introduction of dispersion creates a coupling between the transverse and longitudinal planes. If this coupling is handled properly, one can achieve cooling in all three phase space planes. This is usually done by placing a wedge-shaped absorber in a region where there is dispersion. I will demonstrate using an eigenvalue analysis that there are other configurations of dispersion and absorber shape that will achieve ionization cooling in all phase space planes. In particular, I will show that a one can even achieve cooling in all phase planes with a parallel-faced absorber in a dispersion-free region. I will use perturbation theory to approximate the change in the cooling rates due to longitudinal-transverse coupling. I will then describe how the cooling of longitudinal oscillations can be understood via the projection of the "longitudinal" eigenmodes into the transverse plane.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
