An experiment to measure an invariant mass of <inline-formula> <tex-math notation="LaTeX">\phi </tex-math></inline-formula> mesons in nuclear medium is planned as the J-PARC E16 experiment. A trigger ...merging module (TRG-MRG) has been developed to detect leading-edges from 256 channels of discriminator-output signals and transmit those serialized hit data to trigger decision module with four optical links. The result of the test shows enough performance of the TRG-MRG as 1-ns time-to-digital converter (TDC) and data multiplexer with four 6.25 Gb/s transceivers.
The J-PARC E16 experiment was proposed to investigate the restoration of chiral symmetry at the normal nuclear density. E16 will systematically measure in-medium mass of vector mesons at J-PARC ...Hadron Experimental Facility using a 30-GeV proton beam with an intensity of 2 x 1010 protons per pulse. The E16 spectrometer was designed to detect e+e- from slowly moving vector meson, particularly the φ meson. The detector system consists of GEM tracker, Gas Cerenkov detector based on GEM and electromagnetic calorimeter made of lead-glass, whose number of channels reaches about 100,000 in total. The readout electronics, trigger system and data acquisition system for the detectors have been developed, for which level-1 trigger rate of 1-2 kHz is required under several 10 MHz interaction rate. The preparation is underway for the first beam time in 2017.
DAQ-Middleware is a software framework for network-distributed data acquisition (DAQ) systems. We adopted the framework for the J-PARC E16 experiment, which requires a DAQ bandwidth of more than 660 ...MB spill (two-second spill per six-second cycle). We developed a prototype for the DAQ software and confirmed that the prototype's total throughput satisfies the requirements of the experiment.
At the J-PARC E16 experiment1, we measure mass spectra of vector mesons in nuclei from the e+e- decay channel with high precision and high statistics. We have developed the trigger system consisting ...of newly developed ASD ASICs which can extract signals from the GEM foil used as a cathode plane of the induction gap in a GEM chamber and digital electronics using FPGAs which processes binary signals from the ASIC.
Control functionality of DAQ-Middleware Maeda, H; Nagasaka, Y; Sendai, H ...
Journal of physics. Conference series,
01/2014, Letnik:
513, Številka:
1
Journal Article
Recenzirano
Odprti dostop
DAQ-Middleware is a software framework for a network-distributed data acquisition (DAQ) system that is based on the Robot Technology Middleware (RTM). The framework consists of a DAQ-Component, that ...is implemented as a data transfer module, a data gather module, a data record module, etc., and a DAQ-Operator, that is implemented as a control module of other components. The basic functionalities, that are necessary as a DAQ system, such as transferring data, starting and stopping the system, etc., are already prepared in the framework. But one of control functionalities, i.e., the functionality of changing parameter values on the DAQ-Components, wasn't provided yet. In order to implement the functionality, the framework has to have the communication method to transfer data from the DAQ-Operator to the DAQ-Component, and the new state to realize the functionality because it should be separated from a normal state to acquire data. Then we developed and added the new functionality in the DAQ-Middleware to transfer data from DAQ-Operator to DAQ-Components in the new state. The new DAQ-Middleware framework allows us to implement easily not only functionality of acquiring data but also that of controlling component modules.
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