DAVLL Magnetic Cell Holder

Here is a a mount for a Rb cell that can be used for dichroic atomic vapor laser lock (DAVLL) and spectroscopy of gasses in vapor cells. See http://iopscience.iop.org/article/10.1088/0953-4075/40/1/017/meta or other articles about DAVLL for more detail about the physics. Essentially the concept is that a magnetic field will split the atomic transitions of two states. Then by using the proper circularly polarized light and a beam splitter and absorption profile that is linear and crosses zero v