A vacuum pumping system comprising: a high pressure getter pump configured to operate from an initial pressure of between 10 and 10−2 mbar to a second pressure between 10−3 mbar and 10−6 mbar and at least one high vacuum pump configured to operate at higher vacuums than the high pressure getter pump, the two pumps being mounted on a same flange, the flange being configured to mount the vacuum pumping system to a vacuum chamber.