Speaker
Description
The Advanced Accelerator Diagnostics (AAD) Collaboration has developed a high-bandwidth beam diagnostic prototype designed for multi-GHz intensity and centroid position measurements of ionizing particle beams. The system integrates a thinned diamond sensor with a volume of 1.9 x 1.9 x 0.031 mm3 with a compact, low-inductance signal path coupled to a custom readout ASIC (the FastPulse Precision Sampler (FPS)). This ASIC features a high-bandwidth front-end and a 45-element switched capacitor array capable of sampling at up to 37 Gs/s. Experimental validation at the SLAC Next Linear Collider Test Accelerator (NLCTA) facility demonstrated a detection bandwidth of 4 - 5 GHz, with measured rise times of 70 ps, jitter of 50 ps, and an instrument response function (FWHM) under 125 ps. The system achieved a readout frame rate exceeding 130 kHz and an effective number of bits (ENOB) greater than 10, supported by a low sampling noise of 140 µV-rms. Based on these results, the collaboration is scaling to a four-channel position-sensitive system for 2026 testing. Future iterations aim for sub-picosecond timing resolution through enhanced ASIC features, including on-chip digitization and self-triggering capabilities to simplify deployment in detector and accelerator systems.
| Minioral | Yes |
|---|---|
| IEEE Member | Yes |
| Are you a student? | No |