The next generation of particle detectors will feature unprecedented readout rates and require optimizing lossy data compression and transmission from front-end application-specific integrated circuits (ASICs) to off-detector trigger processing logic. Typically, channel aggregation and thresholding are applied, removing information useful for particle reconstruction in the process. A new...
For the High-Luminosity LHC era, the trigger and data acquisition system of the
Compact Muon Solenoid experiment will be entirely replaced. Novel design choices have been
explored, including ATCA prototyping platforms with SoC controllers and newly available
interconnect technologies with serial optical links with data rates up to 28 Gb/s. Trigger data
analysis will be performed through...
Coincidence detectors and time-tagging units are used in many physical experiments. Some experiment in quantum optics need however many channels, which initiated this project, but the board could be used for other experiments too. This device is a 32 channel time-tagging and coincidence detector unit, with about 8 ps of timing resolution, which can process up to 200 million pulses per second...
The time characteristics of fast Multi-pixel Photon Counter (MPPC) are important features that affect its application. The fast timing detector is widely used for picosecond (ps) level time detection, some fast MPPCs with about 100ps@SPE. The time characteristics of fast MPPC refer to the rise time (RT), fall time (FT) and electron transition time (TT)of the output signal. Fast MPPC has an...
Abstract：The research on the time performance test method of ultra-fast photodetector provides an important experimental basis for the performance measurement of domestic ultra-fast photodetector, beam current experiment or detector performance calibration in some special places. In this paper, based on the MCP-PMTs with about 50ps@SPE and some fast SiPM with about 100ps@SPE, the time...
During the operation of J-PARC timing system since 2006, there were a few unexpected trigger-failure events occurred. It was difficult to find the faulty module among many suspicious modules. In order to find such a module easily, a Yokogawa PLC- type triggered scaler module was developed. It can accept the start of J-PARC Main Ring (MR) slow cycle (2.48s/5.2s) signal and the start of rapid...
The dead layer thickness increase of HPGe detectors in during the operation time is main effect for reducing the volume and the full energy peak efficiency FEPE of the HPGe detector. In the work, we studied the influences of dead layer thickness on the whole gamma spectrum response for HPGe detector by using Monte Carlo simulation. From the simulated relation of the FEPEs and the dead layer...
The Reactor Excursion and Leak Analysis Program (RELAP5) is a light water reactor transient analysis code for simulation of hydraulic and thermal transients in both nuclear and nonnuclear systems for which a new RELAP5-based real time simulation code has been developed at the Center for Nuclear Technologies (CNT) for the Dalat Nuclear Research Reactor (DNRR) in Vietnam. However, a probable bug...
In the present work, the response function of a neutron dose rate meter (Aloka TPS-451C) has been evaluated based on the characteristics of various neutron standard fields with 252Cf and 241Am-Be sources (established in the previous works) and a self-developed unfolding code (applied the Singular Value Decomposition, SVD, approach). Measurements of neutron ambient dose equivalent rates,...
Charge integration ratio (Qratio), method in the Pulse Shape Discrimination (PSD) technique has been widely used to discriminate between fast neutron and gamma in organic scintillation detectors. Here Qratio is defined as the ratio of tail integration to total integration of digitized pulses. In this method, tail integration window is depends much on the decay components in fluorescence of...
In previous studies, the great potential in transmutating transuranic elements from spent nuclear fuel of the accelerator-driven system (ADS) was confirmed by the calculation results obtained by the Monte Carlo method simulation codes. The fast neutron spectrum system showed a benefit for reducing minor actinide (MA) inventories in the fuel cycle. However, the reliability of the calculation...
As the most complx medical equipment, proton therapy system(PTS) must have a safety interlock system(SIS) which completely avoid non-necessary radiation dose to patients or personnel during operation. Due to the proton beam moves with around two thirds of light speed, the safety interlock system should cut off the proton beam within specified time to ensure the over dose in each field less...
The Jiangmen Underground Neutrino Observatory (JUNO) aims to determine the neutrino mass ordering along with other purposes. There are about 20000 20’ inch and 25000 3’ inch PMTs in central and veto detects. The DAQ is required to readout about 40GB/s full waveform data from large PMTs with 1us sample window, 1GHz sample rate and 1kHz trigger rate. The small PMTs require only readout time and...
Belle II is a luminosity frontier experiment designed to search for physics beyond the standard model of particle physics, and has successfully started the physics data taking on March 2019.
We use seven sub-detectors to record the enormous numbers of events that are produced by the SuperKEKB accelerator.
There are many components to be monitored in our system for smooth data taking, such...
China Fusion Engineering Experimental Reactor (CFETR), an important step to realize the dream of fusion energy, has entered the stage of engineering design and research. The preliminary design of real-time plasma control system (PCS) for CFETR is promoted synchronously. The design of CFETR PCS is composed of real-time control framework, control algorithms integration, and two assistant tools...
The paper presents the development of the second version of a 64-ch SiPM readout ASIC named DIET, which individually amplifies the input current, extracts and digitizes the energy and the arrival time in each channel. Compared to the previous version, more control logics have been integrated on-chip and hence fewer external control ports are required. The crosstalk between the analog and...
The new generation of neutron instrument will use large-scale neutron detectors to complete experiments efficiently and quickly, which means the large number of detector units, the large span of installation location and the complex and flexible experiment scheme. The traditional centralized trigger system and clock synchronization system often use star fan-out structure, and use dedicated...
Deep-sea in situ radiation detection equipment is designed to work at the deep seafloor for half a year. During the period of running, the equipment will generate large volume of data. Besides, this equipment is powered by batteries. So design challenge of large capacity storage with low power is met in the equipment development. This paper proposes a low-power large-capacity storage solution...
The Hadron Experimental Facility at the Japan Proton Accelerator Research Complex (J-PARC) is designed to provide high-intensity beams. A new branched proton beam line called as the “B-line” at J-PARC has been constructed and is going to start its operation from Feb. 2020. A small fraction (<0.1%) of the primary beam is branched by a Lambertson magnet and goes into the B-line. While the beam...
Abstract—Accurate timing is required in the annihilation event calibration and coincidence of the In-Beam positron emission tomography (In-Beam PET), which is the main way for the in-situ monitoring in the Heavy-Ion Cancer Therapy Device (HICTD). To achieve a high-resolution and low-cost time information, a linear digital timing measure method for In-Beam PET based on photomultiplier tube...
Heavy-Ion Cancer Therapy Device (HICTD) developed by the Institute of Modern Physics of the Chinese Academy of Sciences has been equipped for clinical application. The positron emission tomography (PET) located on the beam line, called In-Beam PET, is a key detector in HICTD, which is employed for monitoring during heavy-ion therapy beta+ emitters like $^{11}$C, $^{15}$O, $^{10}$C are...
The back-streaming neutrons (Back-n) facility at China Spallation Neutron Source provides an excellent white neutron source for accurate measurements of nuclear data. At Back-n, the GAEA (gamma spectrometer with germanium array) spectrometer in planning is designed for neutron-induced cross-sections measurements with high accuracy and efficiency. As six kinds of detectors are used in GAEA, it...
The paper presents the development of a 16 channel low power and high integration readout ASIC for time projection chamber (TPC) for the CEPC (Circular Electron Positron Collider) experiment. In order to achieve high spatial and momentum resolution, ~1 million readout channels are required with waveform sampling in 8-10 bits and 10-40 MS/s. Power consumption became very critical and was...
An experiment to search for mu-e conversion named COMET is constructing in J-PARC Hadron hall. The experiment will be carried out using a two staged approach, Phase-I and Phase-II.
The data taking system of the Phase-I experiment is going to be developed based on common network technology. The data taking system needs two kinds of networks. One is a front-end network. This network bundles...
The CDEX (China Dark matter Experiment) now deploys ~10 kg pPCGe (p-type Point Contact Germanium) detectors in CJPL (China Jinping Underground Laboratory). It aims to detect rare events such as dark matter and 0vbb (Neutrinoless double beta decay). The discrimination of bulk and very bulk events are essential for improvements of the analysis threshold of dark matter. Very bulk events are...
In Cooling storage ring External-target Experiment (CEE) in Heavy Ion Research Facility in Lanzhou (HIRFL), Multi-gap Resistive Plate Chambers (MRPC) detectors are utilized for high precision Time Of Flight (TOF) measurement. Especially for some Internal TOF (iTOF) detectors, which is designed to identify the particles scattered after the ion beam hit the target, a very high precision of the...
Radiation measurement at deep-sea environment helps to get a better understanding on deep-sea sedimentation, geological structure, radiation monitoring and so on. However, reports about radiation of natural deep-sea environment are rare, especially about deep-sea in-situ gamma radiation measurement. Two gamma spectrometers and two neutron spectrometers are going to be used in deep-sea in-situ...
Mu2e is a next generation search for muon to electron conversion that will improve the current physics sensitivity by 4 orders of magnitude. The experiment will need a high-quality pulsed proton beam with extinction, or the ratio of out of time to in time protons, better than 10-10. In order to achieve this performance, the beam extinction in the Delivery ring must be better than 10-5. To...
The Belle II experiment is a high-energy physics experiment using the SuperKEKB electron-positron collider. Belle II has started the so-called "phase 3" data taking from March, 2019.
With Belle II data, high precision measurement of rare decays and CP-violation in heavy quarks and leptons will be made to probe New Physics. In this presentation, we present the archiver system to monitor the...
The national project of experimental advanced superconducting tokamak (EAST) is an important part of the fusion development stratagem of China. The safety and interlock system (SIS) is in charge of implementing the investment protection of human and tokamak from potential accidents. The SIS is constituted by two horizontal layers, one for the central safety and interlock system (CSIS), and...
In the field of nuclear physics, DAQ systems based on the legacy parallel bus (CAMAC and VME) are still widely working. In case of RIKEN RIBF which is an accelerator facility dedicated for RI beams in Japan, about 20 VME crates are used for experiments. Recent trends of the DAQ front-end architecture are based on the micro-TCA (uTCA) or the direct attachment of the GigaBit Ehternet (GbE) link....
The data acquisition console is one component of EAST data acquisition system, which provides unified configuration management for data acquisition and data storage. The data acquisition console was developed many years ago, and with the increasing of data acquisition nodes and the emergence of new control nodes, the function of configuration management has become inadequate. It can’t manage...
Verification before and during treatment is very needed in Radiotherapy. 9 out of 17 cases in radiotherapy did not detect any errors during pre-treatment verification but were detected at verification during treatment or real-time measurement, namely In-Vivo Dosimetry (IVD). One of the most massive developments in IVD is using EPID. there are already several algorithms to build it, one...
Particle tracking simulations including space charge effect are very important for high intensity proton rings. Since they include not only Hamilton mechanics of a single particle but constructing charge densities and solving Poisson equations to obtain the electromagnetic field due to the space charge, they are extremely time-consuming. We have newly developed a particle tracking simulation...
The China Fusion Engineering Test Reactor (CFETR) is the next-generation facility in the roadmap for the realization of fusion energy in China, which is at the stage of concept design. During concept design, it is estimated that it will generate about ten million 3D components, 2D diagrams, project and design documents over the entire lifecycle of CFETR. To ensure the consistency of CFETR...
The COMET experiment at J-PARC aims to search for the neutrinoless transition of a muon to an electron (µ–e conversion). Since µ–e conversion is strictly forbidden in the Standard Model, it would be the clear evidence of the new physics if it is found. We have developed the readout electronics board called ROESTI for the COMET straw tube tracker. We plan to install the ROESTI in the gas...
Current Sensitive Preamplifiers (CSPs) are widely used in front-end electronics in DAQ (Data Acquisition System). The optimization of energy resolution requires front-end electronics with low noise and suitable gain, bandwidth, etc. We define the noise normalization factor containing noise, gain of CSPs and integrated gate of pulse. The linear model between energy resolution and noise...
Real-time track reconstruction in high energy physics experiments at colliders running at high luminosity is very challenging for trigger systems. When it is run on FPGAs, the Retina algorithm has been used in High Energy Physics experiments mainly in the case of parallel plane detection layers without magnetic field such as the LHCb VELO detector. However another interesting geometry is a...
We present design and test results of a four-channel 4 x 14-Gbps VCSEL array driver ASIC with a novel output structure fabricated in 65 nm CMOS technology. The driver die features a size of 2000 µm × 1230 µm with four independent channels. Each channel receives 200 mVp-p differential CML signals and outputs a 2 mA bias current and a 5 mA modulation current at 14 Gbps/ch.
The analog core of...
