Bonanno, D

Bongiovanni, D

Gallo, G

Lo Presti, D

Longhitano, F

Reito, S

Undetermined

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Journal of Physics: Conference SeriesPAPER • OPEN ACCESSThe read-out and data transmission for theMAGNEX focal plane detector for the NUMENprojectTo cite this article: D Bonanno et al 2018 J. Phys.: Conf. Ser. 1056 012006 View the article online for updates and enhancements.Related contentThe Front-end for the new focal planedetector for the NUMEN projectD G Bongiovanni, C Agodi, D Bonanno etal.-Challenges for high rate signal processingfor the NUMEN experimentD Lo Presti, C Agodi, D Bonanno et al.-Focal plane detector optical readoutG Gallo, D L Bonanno, D G Bongiovanniet al.-This content was downloaded from IP address 131.204.73.184 on 20/08/2019 at 23:431Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distributionof this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Published under licence by IOP Publishing Ltd1234567890 ‘’“”Conference on Neutrino and Nuclear Physics (CNNP2017) IOP PublishingIOP Conf. Series: Journal of Physics: Conf. Series 1056 (2018) 012006  doi :10.1088/1742-6596/1056/1/012006The read-out and data transmission for theMAGNEX focal plane detector for the NUMENproject.D Bonanno1, D Lo Presti1,2, D Bongiovanni3, G Gallo2,3, FLonghitano1 and S Reito1 for the NUMEN collaboration1 National Institute of Nuclear Physics (INFN-CT), Via Santa Sofia 64, 95123 Catania, I2 Department of Physics and Astronomy, University of Catania, Via Santa Sofia 64, 95123Catania, I3 Laboratori Nazionali del Sud (INFN-LNS), Via Santa Sofia 62, 95123 Catania, IE-mail: danilo.bonanno@ct.infn.itAbstract. The main task of the read-out electronics for the new NUMEN focal plane detector(FPD) is the real-time data collection from the front-end ASICs and the high bandwidthtransmission to data acquisition, in addition to the slow control of the front-end electronics andthe synchronization of the whole detector. The read-out electronics architecture, designed to bemodular and expandable to the final size of the detectors, is based on System On Module (SOM).This very versatile device couples high performance FPGA to powerful processor architectureand allows a graphical approach to the programming and interfacing. A detailed description ofthe architecture and the specifications of the read-out electronics are presented.1. IntroductionWith the ongoing upgrades of the cyclotron accelerator [1] at INFN Laboratori Nazionali del Sud(LNS) foreseen for the NUMEN project [2, 3, 4], an upgrade of the FPD [5] of the MAGNEXspectrometer [6, 7, 8] will be necessary. It includes the design of new front-end (FE) and read-out (RO) electronics, able to couple with the increased event rate (up to 10MHz in the NUMENexperiments). The Segmented anode and the FE electronics were totally redesigned with asolution that includes the VMM3 chip [9]. This solution led to the development of a totallydigital RO based on System On Module (SOM) by National Instruments [10].2. FE-RO ArchitectureThe main idea for the design of the electronics of the new FPD is the use of the same architectureof FE and RO (Figure 1) both for the tracker and the Particles Identification Detector (PID)wall. This choice allows an easier syncronization of the detectors, the uniformity of the dataformat, a contained software development as well as the reduction of the costs. The requirementsfor such system are: readout of about 1400 channels for the tracker and 4000 channels for thePID-wall, capability to handle a foreseen event rate of 100 kHz/cm, modularity, scalability, andradiation hardness. The architecture is based on a replica of the same module shown in Figure2. Each module is equipped with a variable number of VMM3 chips according to the number of21234567890 ‘’“”Conference on Neutrino and Nuclear Physics (CNNP2017) IOP PublishingIOP Conf. Series: Journal of Physics: Conf. Series 1056 (2018) 012006  doi :10.1088/1742-6596/1056/1/012006the corresponding channels to be read-out. These chips are read-out by an FPGA based systemmanufactured by National Instruments (SOM). A single SOM has 160 General Purpose InputOutput pin (GPIO) that could be used, appropriately configured, for data read-out, slow controland communication ports. Taking into account the GPIOs required for slow control and for anadditional Gigabit Ethernet connection, a SOM would be able to manage and read-out the dataof 10 VMM chips. In particular for the tracker, if we keep in mind that the pitch of the stripof the segmented anode is 0.75 mm, and that a VMM reads 64 strip, each SOM should transferdata with a bandwidth of about 3 Gb/s, at the highest event-rate foreseen for the experiment.So the final number of VMM chips coupled to a SOM will be a compromise between the bestbandwidth used by two Gigabit Ethernet connections, available in the SOM, and the possibilityto design an unique kind of board for the front-end of each detector in the experiment.Figure 1. FE-RO architecture.Figure 2. FE-RO module.3. System on Module (SOM)The System on Module (SOM) is a very compact, flexible, reliable, high-performance, industrial-grade, deployment-ready embedded computer. It combines a 667 MHz Dual-Core ARM Cortex-A9 processor, NI Linux Real-Time OS and an Artix-7 programmable Xilinx FPGA. A functionalblock diagram of the SOM is presented in figure 3. Both the real-time processor, whose mainfunctions are communication and signal processing, and the FPGA, usefull to implement high-speed controls, custom timings and triggering, can be programmed with LabVIEW, allowing avery short development time, and a high debugging capacity [11]. In addition, the processorallows to run any application developed for linux-based operative system. Through a single high-density connector, it is possible to access lines dedicated to the main communication standardsmanaged by the processor, as well as 160 digital I / O lines managed directly at the FPGA level:16 Single-Ended 3.3 V and 144 configurable also as 72 differentials. This powerful combinationof resources in a single system allows the management of the slow control of front-end ASICs, theread-out of data and their transfer, through a standard ethernet protocol, towards the systemof storage. The SOM is also able to generate and distribute, with a very low skew, all the clocksignals necessary for the correct functioning of the apparatus. The computational resources of31234567890 ‘’“”Conference on Neutrino and Nuclear Physics (CNNP2017) IOP PublishingIOP Conf. Series: Journal of Physics: Conf. Series 1056 (2018) 012006  doi :10.1088/1742-6596/1056/1/012006this system would also allow to implement triggering and filtering strategies in the case it isnecessary to reduce the data bandwidth at larger event rate. Radiation tolerance tests werealso conducted at the University of Sao Paulo, in the Nuclear and Energy Research Institute(IPEN) reactor. Although data analysis is still in progress, the tests have demostrated thatthe SOM, exposed to a neutron flux (from 104 to 106 n/cm2*s) well above that estimated bythe simulations for the NUMEN experiment, at maximum beam intensity, is subject to someeffects (single event upset) recoverable by a system reset operation. Due to the flexibility of thesystem and its described features, its application as read-out electronics for all the spectrometerdetectors is promising and reliable.Figure 3. Functional block diagram of theSOM (Courtesy by National Instruments).4. StatusThe developers of the chip sent us a complete system to testing and studying the second versionof the chip (VMM2). When all the features that could be of interest for the experiment wereinvestigated and verified, was developed a new read-out board equipped with a SOM thatallowed, coupled with the original front-end board, to test the control and the communicationbetween the SOM and the chip. Then was developed a front-end board with VMM2 useful tostudy the coupling between the whole acquisition system (composed by front-end and read-outcustom boards) and some detector prototypes intended to use in the experiment. Meanwhile anew version of the chip (VMM3) was available and the front-end board was upgraded with anew design that is now under construction.References[1] Calabretta L et al. 2017 Modern Physics Letters A 32 1740009[2] Cappuzzello F et al. 2015 Journal of Physics: Conference Series 630 012018[3] Agodi C et al. 2015 Nuclear and Particle Physics Proceedings 265-266 28 – 30 ISSN 2405-6014 proceedingsof the Neutrino Oscillation Workshop[4] Cappuzzello F et al. 2018 The European Physical Journal A 54 7241234567890 ‘’“”Conference on Neutrino and Nuclear Physics (CNNP2017) IOP PublishingIOP Conf. Series: Journal of Physics: Conf. Series 1056 (2018) 012006  doi :10.1088/1742-6596/1056/1/012006[5] Cavallaro M et al. 2012 The European Physical Journal A 48 59 ISSN 1434-601X[6] Cappuzzello F et al. 2016 The European Physical Journal A 52 167 ISSN 1434-601X[7] Cappuzzello F et al. 2014 Nuclear Instruments and Methods in Physics Research Section A: Accelerators,Spectrometers, Detectors and Associated Equipment 763 314 – 319 ISSN 0168-9002[8] Cunsolo A et al. 2007 The European Physical Journal Special Topics 150 343–346[9] De Geronimo et al. 2013 IEEE Trans.Nucl.Sci. 60 2314–2321[10] URL http://www.ni.com/pdf/manuals/376962c.pdf[11] URL http://www.ni.com/white-paper/6983/en/

The read-out and data transmission for the MAGNEX focal plane detector for the NUMEN project

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The read-out and data transmission for the MAGNEX focal plane detector for the NUMEN project

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