S. Callier - Academia.edu (original) (raw)

Papers by S. Callier

A large prototype of 1.3m3 was designed and built as a demonstrator of the semi-digital hadronic ... more A large prototype of 1.3m3 was designed and built as a demonstrator of the semi-digital hadronic calorimeter (SDHCAL) concept proposed for the future ILC experiments. The prototype is a sampling hadronic calorimeter of 48 units. Each unit is built of an active layer made of 1m2 Glass Resistive Plate Chamber(GRPC) detector placed inside a cassette whose walls are made of stainless steel. The cassette contains also the electronics used to read out the GRPC detector. The lateral granularity of the active layer is provided by the electronics pick-up pads of 1cm2 each. The cassettes are inserted into a self-supporting mechanical structure built also of stainless steel plates which, with the cassettes walls, play the role of the absorber. The prototype was designed to be very compact and important efforts were made to minimize the number of services cables to optimize the efficiency of the Particle Flow Algorithm techniques to be used in the future ILC experiments. The different component...

Calorimeters with silicon detectors have many unique features and are proposed for several world-... more Calorimeters with silicon detectors have many unique features and are proposed for several world-leading experiments. We discuss the tests of the first three 18x18 cm^2 layers segmented into 1024 pixels of the technological prototype of the silicon-tungsten electromagnetic calorimeter for a future e^+e^- collider. The tests have beem performed in November 2015 at CERN SPS beam line.

Showers produced by positive hadrons in the highly granular CALICE scintillator-steel analogue ha... more Showers produced by positive hadrons in the highly granular CALICE scintillator-steel analogue hadron calorimeter were studied. The experimental data were collected at CERN and FNAL for single particles with initial momenta from 10 to 80 GeV/c. The calorimeter response and resolution and spatial characteristics of shower development for proton- and pion-induced showers for test beam data and simulations using Geant4 version 9.6 are compared.

$Research paper thumbnail of Study of $\Lambda $ Identification Method by the $\pi ^{ - }p \to K^{0}\Lambda $ Reaction for a $\Lambda p$ Scattering Experiment at J-PARC$

Proceedings of the 3rd J-PARC Symposium (J-PARC2019), 2021

The π − p → K 0 Λ reaction is an important elementary process to produce Λ from a proton target a... more The π − p → K 0 Λ reaction is an important elementary process to produce Λ from a proton target and is a key for a Λp scattering experiment where the momentum of Λ should be tagged from the missing momentum of the (π − , K 0) reaction. However, the (π − , K 0) spectroscopy method has not been established yet due to the difficulty of the K 0 detection. Therefore, we have proposed a new K 0 detection method where π + and π − from the K 0 decay are measured by a forward magnetic spectrometer and a detector cluster surrounding the target, respectively. The feasibility of the K 0 detection method was confirmed by analyzing the J-PARC E40 data taken with such a detector system. In the analysis, Λ's were successfully identified in the missing mass spectrum of the π − p → K 0 X reaction.

HGCROC-Si and HGCROC-SiPM: the front-end readout ASICs for the CMS HGCAL

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2020

1 Abstract—The two variants of HGCROC are the ASICs designed to readout the more than 6 million c... more 1 Abstract—The two variants of HGCROC are the ASICs designed to readout the more than 6 million channels of the future HGCAL of CMS, which will consist of hexagonal silicon sensors for a large part but also SiPM-on-scintillators tiles. The SiPM version of the chip was made from the silicon version by adapting only the first amplifier stage. The first aspect is on the performance for both versions in terms of noise, charge and timing, the DAQ and Trigger paths, as well as results from irradiation qualification with total ionizing dose and heavy ions for single-event effects. The third version of HGCROC chip is a major digital release, with RadHard solutions and an additional buffer.

Proceedings of the 5th International Workshop on New Photon-Detectors (PD18), 2019

We have fabricated the CATCH (Cylindrical Active Tracker and Calorimeter system for Hyperonproton... more We have fabricated the CATCH (Cylindrical Active Tracker and Calorimeter system for Hyperonproton scattering) system which consists of CFT (Cylindrical Fiber Tracker) and a BGO calorimeter for a scattering experiment between a Σ hyperon and a proton. CATCH measures trajectories and energy deposits of particles emitted a target which is installed at the most inner part of CATCH. CFT consists of 8 layers of scintillation fibers with two fiber configurations. About 5, 000 fibers are used and are read by MPPC for each fiber. All MPPCs are operated by EASIROC boards which have essential functions such as measurement of ADC, TDC, and bias adjustment for MPPCs. We performed a test experiment and confirmed that the CATCH system had sufficient performances for the Σp scattering experiment. We actually performed the first stage of the Σp scattering experiment at J-PARC in June 2018. The energy calibration was performed by using pp and πp elastic scatterings. Elastic scatterings between pp and π − p were identified with the CATCH system. The particle separation between proton and pion was also performed by using a correlation between the energy deposits in CFT and BGO calorimeter. Although more detailed analysis for deriving the cross section of Σp scattering is necessary to derive the cross section of Σp scattering, we have confirmed that CFT has enough angular resolution of tracking and energy resolution in order for the identification of the scattering events and particles.

The MU-RAY project: detector technology and first data from Mt. Vesuvius

Journal of Instrumentation, 2014

ABSTRACT Muon Radiography allows to map the density of a volcanic cone. It is based on the measur... more ABSTRACT Muon Radiography allows to map the density of a volcanic cone. It is based on the measurement of the attenuation of the flux of muons present in the cosmic radiation on the ground. The MU-RAY project has developed an innovative detector designed for the muon radiography. The main features are the low electric power consumption, robustness and transportability, good spatial resolution and muon time of flight measurement. A 1 m(2) detector prototype has been constructed. and collected data at Mt. Vesuvius for approximately 1 month in spring 2013. A second campaign of measurement has been performed at the Puy de Dome, France, in the last four months of 2013. In this article the principles of muon radiography, the MU-RAY detector and the first results from the collected data will be described.

The EUDET-project was launched to create an infrastructure for developing and testing new and adv... more The EUDET-project was launched to create an infrastructure for developing and testing new and advanced detector technologies to be used at a future linear collider. The aim was to make possible experimentation and analysis of data for institutes, which otherwise could not be realized due to lack of resources. The infrastructure comprised an analysis and software network, and instrumentation infrastructures for tracking detectors as well as for calorimetry.

The purpose of the MU-RAY project is to develop an innovative approach to the study of volcanoes ... more The purpose of the MU-RAY project is to develop an innovative approach to the study of volcanoes and their monitoring based on a particle physics approach. The test site is Vesuvio: one of the higher risk volcanoes in the world. In this context, muon radiography is an innovative method of enormous impact. This is an imaging technique which relies on the measurement, by means of a cosmic ray telescope, of the absorption in the volcano of muons with near-horizontal trajectories, produced by the interactions of cosmic rays with the atmosphere. Since 2003 this technique has been successfully used on volcanoes in Japan, providing pictures of their vertices with resolutions much better than those obtained with the traditional techniques based on gravimeters. Researchers from Naples and Florence are currently involved in the construction and testing of a prototype telescope based on the use of bars of plastic scintillator with a triangular section whose scintillation light is collected by special fibres (wave length shifters) and transported to SiPM (Silicon photomultipliers). A complete prototype telescope, consisting of three xy scintillation planes and 1 m 2 active area has been assembled and is now under test.

The Silicon-Tugsten ECAL developed by the CALICE collaboration is a sam-pling calorimeter based o... more The Silicon-Tugsten ECAL developed by the CALICE collaboration is a sam-pling calorimeter based on tungsten absorber and highly segmented (5 × 5mm) silicon sensor active layers. In this memo we describe the past achievements, present status and future plans of the project.

Petiroc, a new front-end ASIC for time of flight application

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC), 2013

Petiroc is a 16-channel front-end ASIC designed to readout silicon photomultipliers (SiPMs) for p... more Petiroc is a 16-channel front-end ASIC designed to readout silicon photomultipliers (SiPMs) for particle time-of-flight measurement applications. Petiroc combines a very fast and low-jitter trigger with an accurate charge measurement. The concept of the ASIC is to combine two measurement lines that won't interfere one with another to measure both first incident photon timing measurement and whole crystal light charge integration. An adjustment of the SiPM high voltage is possible using a channel-by-channel input DAC. That allows a fine SiPM gain and dark noise adjustment at the system level to correct for the non-uniformity of SiPMs. The power consumption is 3.5 mW/channel, excluding ASIC outing buffer. First measurement on Petiroc shows a time jitter down to 16ps on 20 photoelectrons test pulses and 46ps with 15 photoelectrons from a Hamamatsu MPPC. Charge measurement has been measured and 1% linearity has been measured up to 2000 photoelectrons. Energy resolution has been meas...

Journal of Instrumentation, 2020

As part of its HL-LHC upgrade program, the CMS collaboration is developing a High Granularity Cal... more As part of its HL-LHC upgrade program, the CMS collaboration is developing a High Granularity Calorimeter (CE) to replace the existing endcap calorimeters. The CE is a sampling calorimeter with unprecedented transverse and longitudinal readout for both electromagnetic (CE-E) and hadronic (CE-H) compartments. The calorimeter will be built with ∼30,000 hexagonal silicon modules. Prototype modules have been constructed with 6-inch hexagonal silicon sensors with cell areas of 1.1 cm2, and the SKIROC2-CMS readout ASIC. Beam tests of different sampling configurations were conducted with the prototype modules at DESY and CERN in 2017 and 2018. This paper describes the construction and commissioning of the CE calorimeter prototype, the silicon modules used in the construction, their basic performance, and the methods used for their calibration.

Report to the DESY PRC

We present an overview of the CALICE activities on calorimeter development for a future linear co... more We present an overview of the CALICE activities on calorimeter development for a future linear collider. We report on test beam analysis results, the status of prototype development and future plans.

$Research paper thumbnail of Establishment of a Modern Experimental Technique of a $\Sigma p$ Scattering Experiment at J-PARC$

We are performing a scattering experiment between a Σ hyperon and a proton (J-PARC E40) at the K1... more We are performing a scattering experiment between a Σ hyperon and a proton (J-PARC E40) at the K1.8 beamline in the J-PARC Hadron Hall. The purpose of this experiment is to investigate the ΣN interaction by measuring the differential cross sections of the Σ + p, Σ − p elastic scatterings and Σ − p → Λn inelastic scattering. The experimental data gives a strong constraint on the theoretical models of the ΣN interaction. The identification of Σp scattering event with a high statistics is important by overcoming the difficulties in the hyperon proton scattering experiment. We have introduced a new identification method of the Σp scattering event, which does not need to detect Σ particles directly. We used a new detector system called CATCH and two spectrometer systems installed at the upstream and the downstream of a liquid hydrogen target. A high intensity π beam of 20 M/spill was used to produce Σ particle. The momenta of π beam and scattered K + were measured by the spectrometers to reconstruct the momentum of a Σ beam produced via the πp → ΣK + reactions. The scattering angle and the kinetic energy of recoil protons from the Σp scattering were measured by CATCH for the identification of the Σp scattering events by checking the kinematic consistency. A part of the experiment was performed in 2018 and 2019 in J-PARC. As a result of analyzing the collected data, the Σ − production and the Σ − p scattering reaction have been identified. It means that our new measurement and analysis method are successfully working well. Analysis for deriving the differential cross section of the Σp scattering is on going.

In addition to intra-operative counting probes, compact gamma cameras are very attractive to prov... more In addition to intra-operative counting probes, compact gamma cameras are very attractive to provide more efficient tumor localization during radio-guided cancer surgery. In that context, we propose to study the potentiality of SiPM devices in order to develop novel very light hand-held gamma cameras with high performances. We report here the design and features of a photodetection module, based on 2x2 SiPM monolithic arrays, each of them consisting of 4x4 SiPMs coupled to a miniaturized readout electronics based on a dedicated ASIC. The overall dimensions of the electronics (64 channels) fit the size of the detector, enabling to assemble side-by-side several elementary modules without dead-zone. Beyond the compactness, the readout electronics also provides multiplexed charge measurement, individual SiPM bias voltage adjustment, real-time temperature-compensated circuit and low power consumption. Preliminary evaluation of the performances of the photodetection module for gamma imagi...

MAGICS: a MiniAturized Gamma Imager for Cancer Surgery

The ILD Si-W ECAL is a sampling calorimeter with tungsten absorber and highly segmented silicon l... more The ILD Si-W ECAL is a sampling calorimeter with tungsten absorber and highly segmented silicon layers for the International Large Detector (ILD), one of the two detector concepts for the International Linear Collider. SKIROC2 is an ASIC for the ILD Si-WECAL. To investigate the issues found in prototype detectors, we prepared dedicated ASIC evaluation boards with either BGA sockets or directly soldered SKIROC2. We report a performance study with the evaluation boards, including signal-to-noise ratio and TDC performance with comparing SKIROC2 and an updated version, SKIROC2A. Corresponding author. Prepared for submission to JINST Calorimetry for the High Energy Frontier (CHEF2017) Oct. 2017 Lyon Performance study of SKIROC2/A ASIC for ILD Si-W ECAL T. Suehara,a,1 I. Sekiya, S. Callier, V. Balagura, V. Boudry, J-C. Brient, C. de la Taille, K. Kawagoe, A. Irles, F. Magniette, J. Nanni, R. Pöschl, T. Yoshioka, and ILD SiW-ECAL group Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819...

OMEGA SiPM readout ASICs

The paper describes various multi-channel ASICs designed by OMEGA laboratory and WEEROC company t... more The paper describes various multi-channel ASICs designed by OMEGA laboratory and WEEROC company to readout SiPM or MPPC-based detectors used in particle physics or astrophysics experiments.

A detailed investigation of hadronic interactions is performed using π− data with energies in the... more A detailed investigation of hadronic interactions is performed using π− data with energies in the range 2–10 GeV, recorded at FNAL in 2008, incident on a high granularity silicon-tungsten electromagnetic calorimeter. The region in which primary π− interact with the detector material and the secondary particles produced are characterised using a novel track-finding algorithm that reconstructs tracks within hadronic showers in a calorimeter in the absence of a magnetic field. The principle of carrying out detector monitoring and calibration using MIP-like tracks is also demonstrated.