ALICE Experiment Upgrades at AGH University: ‘This Breakthrough Will Change Physics Forever,’ Scientists Claim

In the ever-evolving landscape of high-energy physics, the ALICE experiment stands as a beacon of innovation and collaboration. At the heart of this endeavor is AGH University of Krakow, a key player in developing the technology that fuels groundbreaking research at CERN. Recently, Professor Jacek Kitowski shared insights into the ongoing upgrades of the ALICE experiment, shedding light on the past achievements and the ambitious plans for the future. These updates not only highlight the technical prowess of the AGH team but also underscore the importance of international collaboration in advancing scientific frontiers.

Collaboration Between AGH and CERN

The partnership between CERN and AGH University of Krakow is rooted in a long-standing tradition of cooperation in high-energy physics. Since the early days, AGH has been actively involved in various significant experiments at CERN, such as ATLAS, CMS, and LHCb. This collaboration was further solidified in 2017 when AGH joined the ALICE experiment as an associate member, achieving full membership by 2020. This milestone marked a new era of involvement, with AGH making substantial contributions to electronics, software engineering, and the application of artificial intelligence and machine learning to data acquisition, analysis, and simulations.

AGH’s role in these collaborations extends beyond mere participation. The university has been instrumental in advancing the electronics and software engineering necessary for the ALICE experiment. By leveraging their expertise in artificial intelligence and machine learning, AGH has enhanced data acquisition processes and facilitated more efficient analysis and simulations. This integration of cutting-edge technology exemplifies how scientific progress often hinges on the collaborative efforts of diverse teams from around the world.

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Advancements in FIT Detector Electronics

One of the pivotal projects in which AGH has been involved is the development of readout electronics for the Fast Interaction Trigger (FIT) detector. This project presented unique challenges, especially during the COVID-19 pandemic, which hindered collaboration. Additionally, geopolitical issues further complicated the situation, affecting the FIT collaboration significantly. Despite these obstacles, the AGH electronics team demonstrated remarkable adaptability and resilience. They undertook the development and improvement of front-end electronics, contributing their expertise to enhance the FIT detector’s capabilities.

The establishment of a dedicated FIT laboratory at AGH in 2024 marked a significant milestone in this endeavor. This facility, supported by the Ministry of Science and Higher Education, enabled the local development of electronics and fostered the involvement of enthusiastic students. The new laboratory features integrated components that ensure reliable, high-speed triggering and data acquisition. By improving measurement precision and flexibility, these advancements pave the way for future applications in the ALICE 3 experiment.

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Planning for ALICE Run4 and Beyond

Looking ahead, the AGH electronics team is preparing for significant updates in ALICE Run4, scheduled for 2030–2034. One of the proposed innovations involves a new charge integrator architecture using operational transconductance amplifiers (OTAs) instead of traditional operational amplifiers. This design is expected to address current challenges related to high bandwidth and parasitic charge in traditional designs. Early tests of OTA-based integrators have yielded promising results, indicating potential improvements in performance.

Another focus area for the upcoming Run4 is the development of new FPGA firmware for the Trigger Control Module (TCM). This upgrade aims to enhance compatibility with ALICE’s Detector Control System (DCS) requirements, utilizing GBT links for control and monitoring. Such advancements underscore the dynamic nature of scientific research, where continuous innovation and adaptation are essential to meet evolving demands.

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Machine Learning in Detector Simulations

As the ALICE experiment continues to evolve, so too does the approach to data simulation. AGH’s data science team is pioneering the use of machine learning-based surrogates for ALICE detector simulations. This initiative addresses the growing demand for fast, high-fidelity simulations, which traditional methods struggle to meet due to increasing data requirements. By employing state-of-the-art generative models, the team can emulate detector responses with remarkable speed and accuracy.

The research focuses on Zero Degree Calorimeter and Forward Hadronic Calorimeter simulations, employing models like Generative Adversarial Networks (GANs) and Variational Autoencoders (VAEs). These models offer a trade-off between simulation speed and output quality, allowing researchers to tailor their approach based on specific analysis needs. By integrating symbolic and pattern-based alternatives, such as the Deep Associative Closed-Pattern Structure (DeepACPS), the team hopes to enhance simulation capabilities further, offering insights into complex interdependencies and improving explainability.

Optimizing Computing Resources

The ALICE experiment relies heavily on a distributed Grid infrastructure to manage its extensive computational needs. With approximately 500,000 jobs processed daily across 60 computing clusters worldwide, efficient resource management is crucial. However, the existing scheduling approach faces limitations, with jobs requesting overly long execution times to ensure completion on the slowest hardware. This static allocation leads to inefficiencies, as jobs are delayed until longer slots become available.

To address this challenge, a new method has been developed using machine learning to predict job execution times based on input parameters and target host specifications. This approach allows for more efficient allocation of resources, enabling the scheduler to adjust job requirements dynamically. By optimizing the scheduling process, the ALICE experiment can achieve better resource utilization, ultimately advancing scientific research.

The journey of AGH University of Krakow in upgrading the ALICE experiment exemplifies the profound impact of collaboration and innovation in science. As they continue to push the boundaries of high-energy physics, what new frontiers will they explore next? What challenges and opportunities will arise as they strive to enhance our understanding of the universe?