The present invention is for an improved ionization source chamber and ion beam delivery system which includes a vacuum chamber and flange arrangement, for mounting the means for transferring sample ions from the port to a mass analyzer and for mounting the ion production means, respectively. A printed circuit board includes at least one memory interface buffer chip to connect a memory controller of core logic and an advanced memory buffer. Film-cooling holes 13 penetrate from an inner wall surface 111 to an external wall surface 112 and form a cooling film. A resilient, eccentric linkage controls pinch wheel pressure.