Results 1 - 10 of 78
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[en] The plan of the data acquisition (DAQ) scheme in High Energy Physics (HEP) experiments comprises of information transfer from the front-end electronics (FEE) of the detectors placed in experimental cavern to the data storage via the FPGA based data processing units. With major upgrades of the LHC experiments at CERN, the data transmission rates in the DAQ frameworks are expected to reach about few terrabytes per second within the following couple of years. In this paper, the optimization technique is implemented on a latest 20nm Intel Arria-10 FPGA. It is tested for the link rate of three high-speed communication protocols commonly used for data transmission in the HEP experiments. The robustness of the optimization technique has been tested with most stressed and transitional data conditions. The test results and the improvements in the metrics of signal integrity for different link speeds are presented and discussed
[en] In the field of experimental nuclear physics and high energy physics Data Acquisition Systems are used to acquire raw data at highest possible event rates. Although digital systems and VME are now prevalent, the older CAMAC systems are still in use at IUAC and other laboratories to utilize existing hardware. The IUAC experimental and accelerator facilities GPSC, LINAC, HIRA and test laboratories make use of CAMAC. In view of ageing and obsolete CAMAC controllers it has become necessary to provide new commercially available crate controllers in many setups. The software system LAMPS (BARC-TIFR), developed for CAMAC and VME is used extensively in several laboratories in India. Reported in this paper are details of setting up LAMPS data acquisition for two new crate controllers: C111C, an Ethernet CAMAC controller available from CAEN and CCUSB a USB based CAMAC Crate Controller from WIENER
[en] In physics it is frequently needed to precisely measure the count rate of some process. Quite often one needs to account for electronics dead time, pile-up and other features of data acquisition system to avoid systematic shifts of the count rate. In this article we present a statistical mechanism to diminish or completely eliminate systematic errors arising from the correlation between the events. Also we present examples of application of this method to the analysis of "Troitsk nu-mass" and "Tristan in Troitsk" experiments.
[en] Pelletron Laboratory The areas of research within the Pelletron Laboratory are ion–matter interactions and their exploitation in IBA, ion beam modification and ion beam lithography. For IBA, the research focuses on the development of new high performance detectors, digitizing data acquisition systems and the development of IBA software. The ion beam modification focuses mainly on the fabrication of nano- and microsized ion tracks by means of energetic heavy ion beams from a cyclotron. Central to ion beam lithography is the fabrication of nano- and microfluidic high aspect ratio structures to polymers, quartz and glasses.
[en] The user customisable VME modules, which are available in market are mostly processor based, where VME IOs are handled by the processor chip and response time is slow. This paper will describe the design and development of a FPGA based VME 64 standard general purpose 6U module and its application for time stamp sharing. This module has front end SFP port for high speed optical communication to other module. The module will also serve as development platform to implement any user level logic for VME board. The module also has future scope for attachment of mezzanine board for further extension of input processing
[en] X-ray cargo inspection systems installed in airports and borders, are used to identify contraband such as nuclear materials, explosives, or drugs. It includes X-ray generator, cargo transporting equipment, control system and image processing system. The image processing system, particularly, is composed of sensor module, data acquisition system, control unit and computer. In this study, we have been developed a data acquisition system for FPGA-based 64-channel image sensor module. The system produces local timing signals to control the sensor module, digitize analog output signals generated from sensor module, and transmit digital data sequentially to control unit without loss. The timing of the main control signals was verifed by using a logic analyzer. The detector array was irradiated with visible light, and output pulses corresponding to the incident direction and intensity were observed by oscilloscope. Finally, the images were successfully captured according to the intensity of visible light by data acquisition software
[en] The Indian National Gamma Array (INGA) has been the main workhorse for endeavours pertaining to in beam gamma ray spectroscopy within the country for over two decades. The facility has ushered extensive and unique developments both in the domains of electronics and date acquisition systems along with the advances in data sorting and analysis. A major landmark in the context of INGA has been the use of Digital Signal Processing based electronics and data acquisition system. The current presentation aims at discussing the results from the recently concluded campaign of INGA at VECC, wherein the digital DAQ developed by the UGC-DAE-Consortium for Scientific Research, Kolkata Center (UGC-DAE CSR KC) group has been used. The results from this campaign are expected to amplify the power of the system, which to the best of our knowledge is one of it's maiden kind in the context of implementing the DSP algorithms for gamma rays spectroscopy. (author)
[en] Radiometry is a Non-Destructive Technique (NDT) used to test quality of products or manufacturing procedures in industries. It has been used for testing shielding integrity of material for many decades. It involves use of a gamma ray source and compatible detector. It is observed that working with corded detectors could be strenuous in practical radiometry applications. Corded detectors have limitations on its length and accessibility. A Wi-Fi enabled detector can present a solution to this problem. This paper discusses a systematic study performed to investigate the response characteristics of a Wi-Fi enabled Gd3Ga3Al2O12(Ce) scintillation detector. The objective of this research is to study the feasibility of using such type of data acquisition system in radiometry application. The effect of different parameters such as recording time, distance and shielding between source and detector on the intensity of radiation is studied. This data acquisition system shows conformance with the corded detector close to 5%. Accordingly, the detector was successfully used for shielding integrity test on a lab-scale shield
[en] ZDAQ is a light data acquisition system, based on ZeroMQ and mongoose-cpp networking frameworks. Providing binary data collection, events building, web accessible finite state machine and process control, it is well suited to manage distributed data source of laboratory or beam test. It provides a simple event building (one unique process, no parallel building) with flexible data writing formats. It is intensively used for the tests of the Semi Digital HCAL (RPC+Fe) prototype designed for ILD and also for the tests of the new electronic for improved RPC (CMS HL-LHC upgrade)
[en] The data acquisition system for the experimental nuclear physics using cyclotrons at VECC relied upon CAMAC, VME backplanes along with use of commercially available hardware modules as the number of detectors used in the nuclear physics experiments were few in numbers. However, the modern experiments which were planned to be performed with a large number of heterogeneous detectors in order of thousands, these module based approach with VME and CAMAC as backplane are no more convenient as the count rate handling capacity of the DAQ reduces to hundreds of Hz when number of channels increases. With this motivation, the development of FPGA based state-of-the-art independent digital DAQ with readout ASIC for the front-end electronics has been undertaken which will cater to the requirements of handling huge number of detectors with high count rate handling capability