A method of purifying ammonia borane is provided in which crude ammonia borane is dissolved in an organic solvent, such as an ether, and mixed with a basic aqueous solution to form a two-phase system. A closing plate displacement mechanism using, for example, a combination of one or more leaf springs and one or more electromagnets or a combination of one or more linear actuators and one more pins, is used to moving the closing plate toward or from the liquid confinement structure. An interval D between the magnetic substance and the straight line portion is 1 to 3 mm. The part of the main coupling path bypassed by the sub coupling path includes at least one capacitive coupling path. The Layer 2 switch further enlarges a transmission buffer thereof at the multicast router side, so that the packets can be stored in the buffer. A radiation detector is optically coupled to a scintillator material having a cubic garnet host and praseodymium distributed within the host, wherein the praseodymium acts as an activator, and wherein the scintillator material emits ultraviolet radiation in response to stimulating gamma ray radiation.