Implementing a Low-Threshold Analysis with the Askaryan Radio Array (ARA) Kaeli Hughes , * on behalf of the ARA Collaboration

An increasing number of experiments are targeting GHz bandwidth impulsive radiation induced by high energy neutrinos in ice or high energy cosmic ray air showers. Beamforming triggers improve detection prospects as effective signal-to-noise ratio scales as the square root of the number of phased array antennas in a coherent sum. However, this also brings high technological requirements with an increasing number of narrower beams required, while sub-nanosecond synchronisation must be maintained across the antennas summed in each beam. A prototype digital beamforming trigger is developed using Radio-frequency-system-on-a-chip (RFSoC), an adaptable radio platform leveraging the advantages of Field Programmable Gate Arrays (FPGAs). Findings are presented including cross channel alignment, trade-offs between resource usage and trigger efficiency and using programmable logic for flexible digital filtering capabilities.

Although body contact can solve the problem of floating body effect in the partially-depleted (PD) SOI technology, it still has important influence on the ESD protection performance. In order to investigate the influence of body contact on the ESD protection performance, three different structures are fabricated in 0.35μm PD SOI salicided CMOS technology, they are stick gate structure with body floating, H gate structure with body contact located outside the edge gate, and body tied source (BTS)structure with body contact placed intermittently along the source diffusion. The transmission line pulse generator(TLPG) measured results of these three different structures are compared and analyzed, both the stick gate structure with body floating and BTS structure have a better robustness level than H gate structure with body contact.