M. Bizzarri

Use of FPGA embedded processors for fast cluster reconstruction in the NA62 liquid krypton electromagnetic calorimeter

The goal of the NA62 experiment at the CERN SPS is the measurement of the Branching Ratio of the very rare kaon decay K+??+??? with a 10% accuracy by collecting 100 events in two years of data taking. An efficient photon veto system is needed to reject the K+??+??0 background and a liquid krypton electromagnetic calorimeter will be used for this purpose in the 1-10 mrad angular region. The L0 trigger system for the calorimeter consists of a peak reconstruction algorithm implemented on FPGA by using a mixed parallel architecture based on soft core Altera NIOS II embedded processors together with custom VHDL modules. This solution allows an efficient and flexible reconstruction of the energy-deposition peak. The system will be totally composed of 36 TEL62 boards, 108 mezzanine cards and 215 high-performance FPGAs. We describe the design, current status and the results of the first performance tests.

First operation of the level-0 trigger of the NA62 liquid krypton calorimeter

The NA62 experiment at CERN Super Proton Synchrotron aims at studying ultra-rare decays of charged kaons for precise tests of the Standard Model. The complete experimental setup is being commissioned for the first physics data taking in the autumn of 2014. This paper presents the final design and implementation of the Level-0 trigger system of the LKr calorimeter, acting as hermetic photon veto of the experiment in the 1-8.5 mrad region. The first on-field performance tests are presented.

A pulsed nanosecond IR laser diode system to automatically test the Single Event Effects in the laboratory

A pulsed nanosecond IR laser diode system to automatically test the Single Event Effects in laboratory is described. The results of Single Event Latchup (SEL) test on two VLSI chips (VA HDR64, 0.8 and 1:2 mm technology) are discussed and compared to those obtained with high-energy heavy ions at GSI (Darmstadt). r 2002 Elsevier Science B.V. All rights reserved.

A LYSO Calorimeter for the SuperB Factory

The SuperB project is an asymmetric e+e? accelerator of 1036cm?2s?1 luminosity, capable of collecting a data sample of 50?75 ab?1 in five years of running. The SuperB electromagnetic calorimeter (EMC), that will be described in this paper, provides energy and direction measurement of photons and electrons, and is used for identification of electrons versus other charged particles. In particular we will present its design, geometry study and related simulations, as well as R&D on LYSO crystals, a project for the mechanical structure and development on readout and electronics. A matrix of 6 crystals has been tested this year June 2010 at the Beam Test Facility of Frascati (BTF) at energies between 200 MeV and 500 MeV, and a beam test with the complete prototype of 25 crystals is foreseen at CERN in October 2010 to cover the energy range between 500 MeV and 7 GeV.

The Level-0 calorimetric trigger of the NA62 experiment

The NA62 experiment at the CERN SPS aims at measuring the branching ratio of the very rare kaon decay K+ → π+ ν (expected 10−10) with a 10% background. Since an high-intensity kaon beam is required to collect enough statistics, the Level-0 trigger plays a fundamental role in both the background rejection and in the particle identification. The calorimetric trigger collects data from various calorimeters and it is able to identify clusters of energy deposit and determine their position, fine-time and energy. This paper describes the complete hardware commisioning and the setup of the trigger for the 2015 physics data taking.

The Level 0 trigger processor of the NA62 liquid krypton electromagnetic calorimeter

The NA62 experiment at the CERN SPS aims to measure the Branching Ratio of the ultra-rare decay K+ → π+ νν̅, collecting about 100 events in two years of data taking with a signal to background ratio of 10:1. An hermetic photon veto system has been designed to efficiently reject the pi0 background, one of the main background sources, and the 20-ton liquid krypton calorimeter is a fundamental component of such system in the angular acceptance region 1-10 mrad. We present the design of the Level 0 trigger processor that identifies electromagnetic clusters in the calorimeter providing information on time, position and energy reconstruction for each cluster. It is composed of 36 readout boards (TEL62), organized in a three layer parallel system, 108 mezzanines and 215 high-performance FPGAs. It is designed to sustain an instantaneous hit rate of 30 MHz, to process data with a latency of about 100 μs, and to achieve a time resolution of 1.5 ns on the single cluster. Updated production and functionality test results of a trigger slice are presented.

The SuperB factory electromagnetic calorimeter

The SuperB project is an asymmetric e+e− accelerator of 1036 cm−2s−1 luminosity, capable of collecting a 50–75 ab−1 data sample in five years of running. The SuperB electromagnetic calorimeter (EMC) provides energy and direction measurement of photons and electrons and identification versus other charged particles for electrons. A matrix of 25 LYSO crystals has been tested at the Beam Test Facility at Frascati in May 2011 at energies between 100 MeV and 500 MeV. Results from this test will be presented. Design and Monte Carlo studies for the general EMC system will also be presented.

The radiation sensitivity mapping of ICs using an IR pulsed laser system

Abstract Recent results obtained with a pulsed nanosecond IR laser system to automatically test single event latch-up effects in laboratory are presented. In particular, the capabilities of this system to perform detailed mapping for ICs sensitivity to radiation are discussed. Two VLSI ASIC circuits were used for sensitivity mapping. The results are compared with those obtained in heavy ion tests at GSI (Darmstad, Germany).

The NA62 Calorimeter Level 0 Trigger Operation and Performances

The NA62 experiment at the CERN SPS aims to measure the branching ratio of the very rare kaon decay

Performance and operation of the calorimetric trigger processor of the NA62 experiment at CERN SPS

K^+ \rightarrow \pi^+ \nu \bar{\nu}