In addition to the three large LEEPs, QinetiQ has a number of smaller chambers for the bake-out, evaluation, qualification and acceptance of thruster sub-components and other small items of equipment. These range in size from 0.5m to 1.0m diameter, the largest of which can be used to operate a T6-size of thruster in discharge mode for initial diagnostic tests. Figure 3.99 shows two of the most frequently used chambers, both of which can cycle components from -150°C to +200°C.
