Speaker
Description
We are developing DELILA (Digital ELI-NP List-mode Acquisition), a data acquisition system intended for experiments with the γ-ray beam now being installed at ELI-NP (Extreme Light Infrastructure – Nuclear Physics) [1]. An earlier version of the system was operated in experiments at the 9 MV and 3 MV tandem accelerators of IFIN-HH, which served to evaluate its performance ahead of operation at ELI-NP. The limitations identified in those campaigns motivated a redesign of the system, which now sustains stable operation at substantially higher data rates. DELILA is assembled from independent components that together form a single acquisition system, allowing data from several detectors to be recorded concurrently. Inter-component communication, previously handled by CORBA, is now carried over ZeroMQ; the lower-overhead transport raises the sustained acquisition rate and improves the throughput of the system as a whole. The implementation language has likewise been changed from C++ to Rust, which affords memory and thread safety without loss of efficiency [2]. Because the front end is built on commercial CAEN digitizers, whose firmware is not user-modifiable, reliability has been pursued on the host side, including improvements to the Linux device driver for the optical-link interface [3]. Together these changes establish DELILA as a dependable basis for high-precision nuclear-physics measurements at ELI-NP. This poster reports the performance of the system as evaluated in a single experimental campaign, sustaining 5.28 MHz across 208 channels for 13.2 h and recording 78.3 h of continuous data with no pulser event lost.
References
1 S. Aogaki et al., "DELILA: A Scalable Data Acquisition System for Multi-Detector Nuclear Physics Experiments at ELI-NP," in IEEE Transactions on Nuclear Science, vol. 72, no. 12, pp. 3652-3663, Dec. 2025
2 https://github.com/ELI-NP/delila-rs
3 https://github.com/aogaki/caen-a3818-driver