In accordance with the teachings of the present disclosure, an information handling system comprises an information handling resource and a chassis. X-ray attenuation coefficients generated over a range of x-ray energies are used to compute the x-ray phase signal up to a calibration constant. The tuning fork vibrator has two tuning fork arms and a tuning fork base. The expandable engagement wall defines a passage, and the fastener extends through aligned openings in the first member and the head portion of the connector member, into the passage defined by the expandable engagement wall of the second member.