Pushing Readout Bandwidth to Multi-GHz Using High Mobility Diamond and Custom Integrated Circuits*

Electrons exhibit high mobility when excited in monocrystalline diamond, achieving a drift velocity of 1,900–2,500 cm²/Vs, and a saturated drift speed of approximately 200 μm/ns for bias fields in excess of 3 V/μm. Leveraging these exceptional electronic properties, we aim to break the GHz barrier for ionizing particle detection systems. As part of the Advanced Accelerator Diagnostics (AAD) collaboration, we are developing a detection system that integrates a compact signal path with a custom high-bandwidth integrated circuit designed to achieve a readout bandwidth approaching 5 GHz.

In this talk, I will present results from a prototype compact signal path read out by a high bandwidth commercial amplification system, excited by the absorption of an alpha particle from an Americium source. I will also present the result of the characterization, using the signal from a high bandwidth pulser, of the prototype FastPulse Precision Sampler (FPS) ASIC, designed to integrate with the compact signal path to form a complete detection system. Together, these results suggest that the integrated system will achieve a readout bandwidth in the multi-GHz regime