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We present an FPGA-based online data reduction system for the pixel detector of the future Belle II experiment. At the SuperKEKB design luminosity of 8 × 1035 cm−2 s−1 and a trigger rate of 30 kHz, the occupancy of the pixel detector is conservatively estimated at 3 %. With its almost 8 million channels, this corresponds to a data output rate of more than 20 GB/s after zero suppression, dominated...
Current fusion devices consist of multiple diagnostics and hundreds or even thousands of signals. This situation forces on multiple occasions to use distributed data acquisition systems as the best approach. In this type of distributed systems, one of the most important issues is the synchronization between signals, so that it is possible to have a temporal correlation as accurate as possible between...
Thomson scattering diagnostic is the most reliable and widely used method to measure electron temperature and density profiles of magnetically confined plasma. The prototype of data acquisition system for ITER divertor zone Thomson scattering diagnostic has been recently developed at the Budker Institute of Nuclear Physics (Novosibirsk, Russia). The small power (∼10−8W) and short duration (∼3–5 ns)...
The NA62 experiment at CERN will test the Standard Model (SM) of Particle Physics by measuring the Branching Ratio (BR) of the ultra-rare decay of a charged Kaon into a charged pion and two neutrinos (K+→π+νν). The main goal is to collect 100 such events in two years of data-taking, using high-energy in-flight Kaon decays from a 750 MHz hadron beam produced by 400 GeV/c SPS protons impinging on a...
The Belle II experiment [1], the successor of the Belle experiment [2], will go into operation at the upgraded KEKB collider (“SuperKEKB”) in 2016 [3], [4]. SuperKEKB is designed to deliver an instantaneous luminosity ℒ = 8×1035 cm−2 s−1, a factor of 40 larger than the previous KEKB world record. The Belle II experiment will therefore have to cope with a much larger machine background than its predecessor...
The stable and reproducible generation of high average brilliance photon beam at Free Electron Lasers (FELs) requires a high-precision radio frequency (RF) regulation of the accelerating fields inside the cavities. High average power can be achieved with continuous wave (CW) operation, which minimizes Lorentz force detuning effects in superconducting resonant structures leaving microphonics and noise...
TCP and the socket abstraction have barely changed over the last two decades, but at the network layer there has been a giant leap from a few megabits to 100 gigabits in bandwidth. At the same time, CPU architectures have evolved into the multicore era and applications are expected to make full use of all available resources. Applications in the data acquisition domain based on the standard socket...
We have developed a rapid beam emittance measurement system for the K140 AVF cyclotron at Research Center for Nuclear Physics (RCNP). So far, an emittance monitor of conventional type section of a medium energy beam transport (MEBT) system to analyze the quality of the injected beam to the K400 ring cyclotron. Two kinds of emittance monitors were supplemented in the low energy beam line for evaluation...
The paper describes achievements in LLRF based tests preparation for superconducting cryo-modules evaluation for European X-ray Free Electron Laser. The software for automatic cryo-modules characterization at the Accelerator Module Test Facility (AMTF) will be presented. In order to identify fundamental working parameters of the eight TESLA cavities cryomodules the scenario of several tests sequence...
The Large High Altitude Air Shower Observatory (LHAASO) project aims to search the origin of galactic cosmic rays above 30TeV with high sensitivity and wide spectrum, it's a dedicated instrument made by 4 sub-detector arrays. The square kilometer complex array (KM2A) consists 5635 scintillation electron and 1221 muon detectors covering the area of 1.2Km2. To guarantee the angular resolution of reconstructed...
An improved scheme to implement integral nonlinearity (INL) correction of time measurement for BES III endcap TOF (ETOF) upgrade system is presented in this paper. Methods for INL correction in HPTDC (high performance time to digital convertor) adopted in BES III TOF system are proved to be limited in upgrading MRPC system, because sharply increased electronic channels corresponding to detector read-out...
Nowadays accelerator control systems incorporate hundreds of field detection receivers with very high requirements in terms of precision, stability and latency. Modern state-of-the-art analog-to-digital conversion technology allows the use of very high speed ADCs for direct sampling of RF signals without prior RF down-conversion to an intermediated frequency (IF).
The Dark Matter Particle Explorer (DAMPE) is being constructed as a scientific satellite to observe high energy cosmic rays in space. As a main detector of DAMPE, the Bismuth Germanium Oxide (BGO) calorimeter is in charge of measuring particle energy deposition, distinguishing positrons, electrons and gamma rays from hadron background and providing trigger information. The satellite is designed to...
The DAMPE (DArk Matter Particle Explorer) is a scientific satellite aimed at cosmic ray study, gamma ray astronomy, and searching for the clue of dark matter particles, with a planned mission period of more than 3 years. The calorimeter, which is composed of 308 BGO (Bismuth Germanate Oxid) crystal bars, is a critical sub-detector for measuring the energy of cosmic particles from 5 GeV to 10TeV, distinguishing...
The data acquisition system (DAQ) of the CMS experiment at the CERN Large Hadron Collider assembles events at a rate of 100 kHz, transporting event data at an aggregate throughput of 100 GB/s to the high level trigger (HLT) farm. The HLT farm selects interesting events for storage and offline analysis at a rate of around 1 kHz. The DAQ system has been redesigned during the accelerator shutdown in...
Since the 1990s, there has been a dramatic interest in quantum communication. Quantum communication has become the hotspot of future information technology research because of its unique advantages in improving the security, capability and efficiency of information transmission. Free space quantum communication is being developed to ultra-long-distance satelliteto- ground quantum experiment, which...
Generally, the readout system for a typical particle physics experiment is implemented with multi electronic modules resided in a standard crate, e.g. VME. Each module receives data from the front-end electronics (FEE) and transmits them to the crate controller for transferring to the data acquisition (DAQ) system in real time. With the increasing physical event rate and number of electronic channels,...
In modern particle accelerators RF phase detectors have to fulfill high demands on the stability and the accuracy to meet the goals of state-of-the-art synchronization systems. Especially challenges are those cases where the RF signal phase shift accuracy must be measured with fs-accuracy for several hours over the full 2π phase detection range. In these cases special measures on the components non-linearities...
Data acquisition systems in High Energy Physics need to cope with increasing requirement of transmission bandwidth and storage capability. The LHC increase of luminosity and the bunch space reduction, after the first machine shutdown period, will produce more interactions per bunch crossing and increase the level of signal background. In this paper we present the design and study of second level trigger...
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