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Conventional ways of activating a sublimation pump, consisting of feeding a constant current or voltage to a titanium filament, do not give a control of the sublimation rate over the lifetime of the filament. The new method proposed here relies on the fact that a hot filament emits electrons. The temperature of the filament, and hence the sublimation rate, can be stabilized by regulating the electron emission, e.g., as is done for ionization gauges. Well controlled temperature and sublimation rates lead to an increase of the lifetime of the filament. This report presents the results of calculated temperatures and sublimation rates with and without emission stabilization. Experimental values are compared with the calculated ones.