Publication Details (including relevant citation information):
J. Vac. Sci. Technol. A 29(6), 061601-1 - 061601-4 (2011).
A previous method to compensate radiation-induced errors caused by the synchrotron radiation environment used a hot-cathode-ionization gauge with correcting electrode and shield tube. This compensating method was based on an approximate formula, and the compensated pressure measurement displayed large errors for pressures below ∼10−7 Pa. To overcome this problem, a new method, based on an exact formula, and use of precision electrometers, has now been developed and tested in a simulation experiment with excess electrons. This method reduced the pressure-measurement error to approximately 1% and is not restricted to use in a specific pressure range, even without use of a shield tube, unlike the previous method. The experimental result suggests that the new compensating method can be used in severe synchrotron radiation environments with photoelectrons.