Simulation Fidelity Issues for SREMP or SGEMP Tests

It is possible to conduct meaningful SGEMP and SREMP system tests in chambers whose radii are less than approximately twice the smallest system dimensions. The use of low-z coatings on the walls, appropriately designed damper grids, and the greatest possible X-ray beam collimation, allow the missile surface currents induced by electron emission from chamber walls, the entrance foil, and wall-reflected fields to be kept within a factor of two of the value of direct, X-ray induced surface fields. These results are not dependent on X-ray pulse fluence, time history or energy spectrum, or on the air pressure value at which the test is carried out.