The ATLAS EventIndex provides a global event catalogue and event-level metadata for ATLAS analysis groups and users. The LHC Run 3, starting in 2022, will see increased data-taking and simulation production rates, with which the current infrastructure would still cope but may be stretched to its limits by the end of Run 3. This talk describes the implementation of a new core storage service...
The ATLAS EventIndex is going to be upgraded in advance of LHC Run 3. A framework for testing the performance of both the existing system and the new system has been developed. It generates various queries (event lookup, trigger searches, etc.) on sets of the EventIndex data and measures the response times. Studies of the response time dependence on the amount of requested data, and data...
During LHC Run 2, the ATLAS experiment collected almost 20 billion real data events and produced about three times more simulated events. During physics analysis it is often necessary to retrieve one or a few events to inspect their properties in detail and check their reconstruction parameters. Occasionally it is also necessary to select larger samples of events in RAW format to reconstruct...
The project of the Super Charm-Tau (SCT) factory --- a high-luminosity
electron-positron collider for studying charmed hadrons and tau lepton
--- is proposed by Budker INP. The project implies single collision point
equipped with a universal particle detector. The Aurora software
framework has been developed for the SCT detector. It is based on
trusted and widely used in high energy...
This work describes the design of a digital model of an HPC system for processing data from the Super Charm-Tau factory electron-positron collider of the "megascience" class. This model is developed using the AGNES multiagent modeling platform. The model includes intelligent agents that mimic the behavior of the main subsystems of the supercomputer, such as a task scheduler, computing...
The report presents the results of the work of Russian institutes in the processing of ALICE experiment data during the last 3 years of the operation of the Large Hadron Collider (LHC) including the end of the LHC RUN2 and the1st year of the COVID-19 pandemic. The main problems and tasks facing both ALICE Grid Computing and its Russian segment before the LHC RUN3, including the problems of...
Technological advances in the field of virtual reality and personal computation in general brought us to the era of web-based virtual reality, where virtual environments can be accessed directly from web browsers and without the need of installation of any additional software. Such online virtual environments seem to be a promising tool for scientific data visualization. When accessed through...
Multi-Purpose Detector collaboration began using distributed computing for centralized Monte-Carlo generation in the mid of 2019. DIRAC Interware is used as a platform for the integration of heterogeneous distributed computing resources. Since that time workflows of job submission, data transfer, and storage were designed, tested, and successfully applied. Moreover, we observe the growth of...
There are different methods for monitoring engineering, network, and computer systems for high-energy physics experiments. As a rule, they have a common name - Event Display and include a whole range of monitoring and control systems. During the experiment, the facility operator should receive comprehensive information about detector performance in a well understandable and intuitive form to...
We present analysis of performance of MPD data analysis/simulation software MPDroot by profilers and benchmarks.
Based on this we draw preliminary conclusions and set perspectives for future optimization improvements.
Для исследований на ускорительном комплексе NICA (ОИЯИ) необходимы эффективные и быстрые программные реализации алгоритмов моделирования и реконструкции событий. Созданный для эксперимента BM@N пакет BmnRoot базируется на среде ROOT, GEANT4 и объектно-ориентированном фреймворке FairRoot и включает инструменты для исследования характеристик детектора BM@N, а также восстановления и анализа...
The search for short-lived particles is an important part of the physics research in experiments with relativistic heavy ions.
Such investigations mainly study decays of neutral particles into charged daughter particles, which can be already registered in the detector system. In order to find, select and study the properties of such short-lived particles in real time in the CBM experiment...
The paper describes method for modeling beam dynamics based on the calculation of ordinary differential equations with Taylor mapping. This method allows you to get the solutions of the system both in symbolic and numerical form. Using numerical simulation methods, one can obtain partial solutions of beam dynamics process. The paper considers the possibility of solving the inverse problem -...
The data flow paradigm has established itself as a powerful approach to the machine learning. Indeed, it is also very powerful for the computational physics, although it is not used as much in the field. One of the complications is that physical models are much less homogeneous compared to ML, which makes their description a quite complicated task.
In this talk we present a syntax analyzer...
The recognition of particle trajectories (tracks) from experimental measurements plays a key role in the reconstruction of events in experimental high-energy physics. Knowledge about the primary vertex of an event can significantly improve the quality of track reconstruction. To solve the problem of primary vertex finding in the BESIII inner tracking detector we applied the LOOT program which...
There are local and global approaches to do track reconstruction depending on the amount of input data available for training a neural network model that solves the reconstruction problem. Global methods need access to all tracks in an event that results in a high memory footprint. We have successfully applied the recurrent neural network (RNN) TrackNETv2 and its updated version v2.1 to the...
