Speaker
Phillipa Smith
(O)
Description
This work describes the responsitivty mapping of an e2v technolgies Swept Charge Device (SCD) CCD236 pre and post irradiation with a 10 MeV equivalent proton fluence of 5.0×108 protons.cm-2. The CCD236 is a large area (4.4 cm2) X-ray detector which will be used in India’s Chandrayaan-2 Large Soft X-ray Spectrometer (CLASS) and China’s Hard X-ray Modulation Telescope (HXMT). Due to the structure of the device, clocking is performed continuously resulting in a linear read out; the flat field illumination used to map the responsivity in conventional CCDs is not possible. An alternative masking technique has been used to expose pinpoint regions of the device to Mn-Ka and Mn-Kb X-rays, enabling a local responsivity map to be built up over the device. This novel approach also allows for an estimation of the charge transfer efficiency of the device to be made by allowing the creation of a CTI scatter plot similar to that typically observed in conventional CCDs.
Author
Phillipa Smith
(O)
Co-authors
Prof.
Andrew Holland
(The Open University)
Jason Gow
(The Open University)
Mr
Peter Pool
(e2v Technologies)
