Kavli Affiliate: Robert Goeke
| First 5 Authors: Eric D. Miller, Eric D. Miller, , ,
| Summary:
AXIS, a Probe mission concept now in a Phase A study, will provide
transformative studies of high-energy astrophysical phenomena thanks to its
high-resolution X-ray spectral imaging. These capabilities are enabled by
improvements to the mirror design that greatly increase the X-ray throughput
per unit mass; and to the detector system, which operates more than an order of
magnitude faster than heritage instruments while maintaining excellent spectral
performance. We present updates to the design of the AXIS High-Speed Camera, a
collaborative effort by MIT, Stanford University, the Pennsylvania State
University, and the Southwest Research Institute. The camera employs
large-format MIT Lincoln Laboratory CCDs that feature multiple high-speed,
low-noise output amplifiers and an advanced single-layer polysilicon gate
structure for fast, low-power clock transfers. A first lot of prototype CCID100
CCDs has completed fabrication and will soon begin X-ray performance testing.
The CCDs are paired with high-speed, low-noise ASIC readout chips designed by
Stanford to provide better performance than conventional discrete solutions at
a fraction of the power consumption and footprint. Complementary Front-End
Electronics employ state-of-the-art digital video waveform capture and advanced
signal processing to further deliver low noise at high speed. The Back-End
Electronics provide high-speed identification of candidate X-ray events and
transient monitoring that relays fast alerts of changing sources to the
community. We highlight updates to our parallel X-ray performance test
facilities at MIT and Stanford, and review the current performance of the CCD
and ASIC technology from testing of prototype devices. These measurements
achieve excellent spectral response at the required readout rate, demonstrating
that we will meet mission requirements and enable AXIS to achieve world-class
science.
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