2 research outputs found
High Resolution, High Speed Detectors with Integrated JFET Electronics
For the European X-ray Multi-Mirror mission (XMM) and the German X-ray satellite ABRIXAS fully depleted
pn-CCDs have been fabricated, enabling high speed, low noise, position resolving X-ray spectroscopy. The detector was designed
and fabricated with a homogeneously sensitive area of 36 cm2 . At 150 K it has a noise of 5 e- rms only, with a readout time of the
total focal plane array of 4 ms. The maximum count rate for single photon counting was 100.000 cps under flat field conditions. Its
position resolution is in the order of 100 µm. The quantum efficiency is higher than 60% from 50 eV up to 15 keV. In addition, new
cylindrical silicon drift detectors have been designed, fabricated and tested. They comprise an integrated on-chip amplifier system
with continuous reset, on-chip voltage divider, electron accumulation layer stabilizer, large area, homogeneous radiation entrance
window and a drain for surface generated leakage current. At count rates as high as 1.000.000 counts per s and per cm2 , they still
show excellent spectroscopic behaviour at room temperature operation