Speaker
Mr
James Carpenter
(Space Research Centre, University of Leicester)
Description
Modern microchannel plate detectors exhibit low quantum efficiency
in the extreme ultra violet range (100-1000 Å) compared to those
manufactured before 1990. The cause of this reduction in efficiency
is unknown. We describe recent investigations into the variation of
surface composition along the channels of a number of MCPs
exhibiting high and low efficiency. These compositional profiles,
generated using energy dispersive X-ray fluorescence spectroscopy,
provide insight into the mechanisms underlying the observed
reduction in quantum efficiency and may assist in efforts to restore
the EUV performance of MCPs through modifications to the
manufacturing process.
Primary author
Mr
James Carpenter
(Space Research Centre, University of Leicester)
