tipp2014 January 2014

tipp2014@nikhef.nl

17 participants
185 discussions

[Tipp2014] [Indico] New abstract submission: DE LA TAILLE, Christophe
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to DE LA TAILLE, Christophe: === Dear Christophe De La Taille, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=146&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: DE LA TAILLE, Christophe Submitted on: 31 January 2014 13:45 Title: PETIROC2 : 32 ch SiGe SiPM readout ASIC for GHz time and charge measurement Abstract content PETIROC2 is a 32 channel readout ASIC for high speed readout of SiPM matrixes. It features a 1 GHz 20 dB preamp followed by 1 GHz high speed discriminator and time-to-amplitude converter to measure the time down to 50 ps. A variable shaper channel measures the charge over 10 bits and also feeds a discriminator for high level signal trigger. The time and charge signals are digitized internally so that the chips can output only digital signals. The ASIC is realize in SiGe 0.35um technology and takes largely advantage of the SiGe bipolar transistors to achieve GHz bandwidhts at a few mW power/channel. The chip was submitted in november 13 and is presently at dicing, experimental results will be available at the conference. Summary Primary Authors: Dr. DE LA TAILLE, Christophe (OMEGA CNRS/IN2P3 et Ecole Polytechnique (FR)) <taille(a)in2p3.fr> Co-authors: CALLIER, Stéphane (OMEGA / IN2P3 - CNRS) <callier(a)lal.in2p3.fr> Mr. DULUCQ, Frederic (CNRS/IN2P3) <fdulucq(a)in2p3.fr> FLEURY, Julien (WEEROC) <julien.fleury(a)weeroc.com> Dr. AHMAD, Salleh (WEEROC FRANCE) <ahmad(a)weeroc.com> MARTIN CHASSARD, Gisele (OMEGA (FR)) <gisele.martin.chassard(a)cern.ch> Mr. RAUX, Ludovic (OMEGA IN2P3) <ludovic.raux(a)in2p3.fr> SEGUIN-MOREAU, Nathalie (IN2P3 & Ecole Polutechnique (FR)) <nsmoreau(a)in2p3.fr> BLIN, Sylvie (CNRS) <sblin(a)in2p3.fr> THIENPONT, Damien (IN2P3/OMEGA) <thienpon(a)in2p3.fr> Dr. TONGBONG, Jeanne (CNRS) <tongbong(a)in2p3.fr> Abstract presenters: Dr. DE LA TAILLE, Christophe Track classification: Data-processing: 3a) Front-end Electronics Presentation type: --not specified-- Comments:

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[Indico] Soumission d'un nouveau résumé: Dr. ATTIÉ, David
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to Dr. ATTIÉ, David: === Dear David Attié, Votre soumission de résumé a été traitée avec succès Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Statut de votre résumé: <https://indico.cern.ch/abstractDisplay.py?abstractId=145&confId=192695>. See below a detailed summary of your submitted abstract: Une conférence: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Envoyé par: Dr. ATTIÉ, David Envoyé le: 31 January 2014 13:41 Titre: Study of a Large Prototype TPC using Micro-Pattern Gas Detectors Abstract content In the last decade, R&D of detectors for the future International Linear Collider (ILC) has been carried out by the community. The International Large Detector (ILD) is one detector concept at the ILC where calorimetry and tracking systems are combined. The tracking system consists of a Si vertex detector and forward tracking disks coupled to a large volume Time Projection Chamber (TPC). Within the framework of the LC-TPC collaboration, a Large Prototype (LP) TPC has been built as a demonstrator. Its endplate is able to contain up to seven identical Micro-Pattern Gas Dectectors (MPGD) modules. Recently, the LP has been equipped with resistive anode Micromegas (MM) or Gas electron Multiplier (GEM) modules. Both the MM and GEM technologies have been studied with a 5 GeV electron beam in a 1 Tesla magnet. After introducing the LP, the current status, recent results (drift velocity, field distortions, ion gate and spatial resolution measurements) as well as future plans of the LC-TPC R&D with MM and GEM will be presented. Summary on behalf of the LC-TPC collaboration Auteurs principaux: Dr. ATTIE, David (CEA/Irfu) <david.attie(a)cea.fr> Co-auteurs: Abstract presenters: Dr. ATTIE, David Classification des thématiques: Sensors: 1c) Gaseous Detectors Experiments: 2a) Experiments & Upgrades Type de présentation: --non spécifié-- Commentaires:

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[Tipp2014] [Indico] New abstract submission:
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to : === Dear , The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=144&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: Submitted on: 31 January 2014 13:35 Title: Radio Detection of Cosmic Rays at the Auger Engineering Radio Array Abstract content The Pierre Auger Observatory detects ultra-high energy cosmic rays by measuring extensive air showers induced in the earth's atmosphere. Besides established detection techniques using a 3000 km2 array of particle detectors sampling shower particles at ground level, and detecting fluorescence light emitted during the shower development with telescopes, the Observatory explores the potential of radio detection of cosmic rays with the Auger Engineering Radio Array (AERA). Radio detection has the potential to provide information on e.g. cosmic ray shower properties with a duty-cycle not limited by day and moon light as in case of the fluorescence technique. AERA consists of 124 autonomous detector stations sensitive to MHz frequencies. The stations feature dual-polarized radio antennas, custom low-noise analog and digital electronics and a broad-band wireless communication system. With AERA we face the challenge of self-triggering on the radio pulse in a background dominated environment by implementing various real-time signal processing strategies within the station electronics. Complementary, we explore the potential of the radio technique as an integral part of future multi-component detectors by utilizing trigger information from the other Auger detectors and recently, by particle detectors integrated in the radio stations. We will discuss the current cosmic ray measurements and the status and prospects of AERA. Summary Primary Authors: Mr. WEIDENHAUPT, Klaus (RWTH Aachen University) <weidenhaupt(a)physik.rwth-aachen.de> Co-authors: AUGER COLLABORATION, Pierre (Observatorio Pierre Auger) <k.weidenhaupt(a)gmail.com> Abstract presenters: Mr. WEIDENHAUPT, Klaus Track classification: Experiments: 2b) Astrophysics and Space Instrumentation Presentation type: --not specified-- Comments: Dear organizers, I would like to present on behalf of the Pierre Auger collaboration, which I added as a co-author. The full author list of the Collaboration can be obtained from: http://www.auger.org/archive/authors_2013_07.html

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[Tipp2014] [Indico] New abstract submission: RIBOLDI, Stefano
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to RIBOLDI, Stefano: === Dear Stefano Riboldi, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=143&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: RIBOLDI, Stefano Submitted on: 31 January 2014 13:32 Title: Germanium detector configuration, readout and signal processing of the GERDA phase II experiment Abstract content The Germanium Detector Array (GERDA) experiment, investigating neutrino-less double beta decay of 76Ge at the Gran Sasso National Laboratory of INFN - Italy is currently upgrading to phase II, in order to improve both its sensitivity and background rejection capabilities. Many technological improvements are foreseen during the planned upgrade; among what most concerns the core of the GERDA experiment there will be: i) the complete rearrangement of the Germanium naked detector array configuration and its handling in the cryogenic (liquid Argon), hostile environment; ii) the major redesign of the cryogenic front-end preamplifiers (CC3), that will be specifically suited to the new low capacitance Broad Energy (BE) Ge detectors and iii) the optimization of the off-line subsequent digital processing, for better energy estimation and pulse shape discrimination of the HPGe waveforms. Given the even tighter specifications of the GERDA phase II experiment with respect to phase I (e.g. energy resolution, pulse shape discrimination, etc.) and the even more stringent associated constraints (e.g. lower-background materials, more deployed detectors, flexibility in handing detectors and associated electronics, etc.), the whole design process turns out to be multi-objective, iterative and multi-disciplinary (involving e.g. physics, electronics, mechanics, leading-edge technologies such as nano-structured materials, etc.). The main steps of this roadmap, a few non-trivial key points (e.g. concerning the design of the very front end electronics) and the overall final results in terms of positive achievements and associated drawbacks will be presented, together with the expected preliminary results of the commissioning phase. Summary Primary Authors: RIBOLDI, Stefano (Universita' degli Studi di Milano) <stefano.riboldi(a)unimi.it> Co-authors: Abstract presenters: RIBOLDI, Stefano Track classification: Sensors: 1b) Semiconductor Detectors Data-processing: 3a) Front-end Electronics Presentation type: --not specified-- Comments: On behalf of the GERDA collaboration

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[Tipp2014] [Indico] New abstract submission: POLAK, Ivo
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to POLAK, Ivo: === Dear Ivo Polak, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=142&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: POLAK, Ivo Submitted on: 31 January 2014 13:28 Title: Gain stabilisation of SiPMs Abstract content The gain of SiPMs depends both on bias voltage and on temperature. For stable operations, both need to be kept constant. In an ILC calorimeter with millions of channels this is a challenging task. It is, therefore, desirable to compensate automatically for temperature variations by readjusting the bias voltage. We have designed an adaptive power supply to achieve this task. We anticipate a gain stability at the level of 1%. First, we present measurements of the gain dependence on temperature and bias voltage for several SiPMs from three different manufacturers and determine the dV/dT dependence. We then demonstrate the performance of the gain stability with a prototype that was constructed in industry after performing measurements with a test board. Summary Primary Authors: POLAK, Ivo (Acad. of Sciences of the Czech Rep. (CZ)) <ivo.polak(a)cern.ch> Co-authors: EIGEN, Gerald (University of Bergen (NO)) <gerald.eigen(a)cern.ch> Abstract presenters: POLAK, Ivo Track classification: Sensors: 1d) Photon Detectors Presentation type: --not specified-- Comments: I am not sure what classification it should be. I hope 1D is close to our HW/ measurement work with SiPM.

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[Tipp2014] [Indico] New abstract submission: BLIN, Sylvie
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to BLIN, Sylvie: === Dear Sylvie Blin, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=141&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: BLIN, Sylvie Submitted on: 31 January 2014 13:19 Title: SPACIROC3: A Front-End Readout ASIC for JEM-EUSO cosmic ray observatory Abstract content The SPACIROC ASIC is designed for the JEM-EUSO fluorescence-imaging telescope on board of the International Space Station. Its goal is the detection of Extreme Air Showers (EAS) above a few 10^19 eV, developing underneath at a distance of about 400 km, in the troposphere. The SPACIROC family is dedicated to readout 64-channel Multi Anode PMT (MAPMT) or similar detectors. The two main features of this ASIC are the photon counting for each input and the charge-to-time (Q-to-T) conversions for each 8-channel sum. In the photon counting mode, the 100% trigger efficiency is achieved for 1/3 photo-electron (pe) input charges and in order to avoid pile-up in case of a large flux of photons, the double pulse resolution is required to be shorter than 10ns. For the Q-to-T converter, the ASIC should operate in a large dynamic range (1pe to 100pe per pixel). The operating conditions of JEM-EUSO require having low power dissipation (1mW/channel). High-speed performances with low power are obtained thanks to the SiGe technology used for the ASIC. This ASIC has been submitted in three successive versions: SPACIROC1, which showed global good behavior, has been used to equip the EUSO-BALLON instrument. The second version was a conservative design to improve performances and decrease power consumption. The third version has been designed to improve the double pulse separation and to increase the charge dynamic range thanks to new front end architecture. The design and performances (with and without MAPMT) of the third version of SPACIROC are presented in TIPP2014 paper. Summary Primary Authors: Mrs. BLIN, Sylvie (CNRS/IN2P3/OMEGA) <sblin(a)in2p3.fr> Co-authors: Mr. BARRILLON, Pierre (CNRS/IN2P3/LAL) <barrillo(a)lal.in2p3.fr> Mr. DULUCQ, Frederic (CNRS/IN2P3/OMEGA) <frederic.dulucq(a)in2p3.fr> Mrs. DAGORET-CAMPAGNE, Sylvie (CNRS/IN2P3/LAL) <dagoret(a)lal.in2p3.fr> Mr. DE LA TAILLE, Christophe (CNRS/IN2P3/OMEGA) <taille(a)in2p3.fr> Ms. MIYAMOTO, Hiroko (CNRS/IN2P3/LAL) <miyamoto(a)lal.in2p3.fr> Mr. MORETTO, Camille (CNRS/IN2P3/LAL) <moretto(a)lal.in2p3.fr> Mr. RABANAL, Julio (CNRS/IN2P3/LAL) <jarr40(a)gmail.com> Mr. THIENPONT, Damien (CNRS/IN2P3/OMEGA) <damien.thienpont(a)in2p3.fr> Ms. TONGBONG, Jeanne (CNRS/IN2P3/OMEGA) <jeanne.tongbong(a)in2p3.fr> Abstract presenters: Mrs. BLIN, Sylvie Track classification: Data-processing: 3a) Front-end Electronics Presentation type: --not specified-- Comments:

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[Tipp2014] [Indico] New abstract submission: CIBINETTO, Gianluigi
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to CIBINETTO, Gianluigi: === Dear Gianluigi Cibinetto, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=140&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: CIBINETTO, Gianluigi Submitted on: 31 January 2014 13:04 Title: A Cylindrical GEM Detector with Analog Readout for the BESIII Experiment Abstract content We are developing a low mass, cylindrical GEM detector with analog readout for the inner tracker upgrade of the BESIII experiment at the BEPC-II e+e- collider. The GEM detector will replace the current inner drift chamber that is suffering early aging due to the increase of the machine luminosity. The new inner tracker is expected to match the momentum resolution (σpt/Pt~0.5% at 1 GeV) and radial resolution (σxy~100μm) of the drift chamber and to improve significantly the spatial resolution along the beam direction (σz ~150μm) with very small material budget (about 1X0). The inner tracker will be composed by three layers of triple cylindrical GEM with an angular coverage of 93% of the solid angle. Each layer is composed by five cylindrical structures: the cathode, three GEMs and the anode readout. To minimize the material, no support frames are used inside the active area and the GEM foils are mechanically stretched being glued to fiberglass rings at their ends. The anode configuration is studied by means of Maxwell and Garfield simulations and with a small-scale planar prototype that is tested with cosmic rays. Preliminary R&D and simulation studies will be presented together with the mechanical design of the detector. Due to the 1 T magnetic field of the experiment an analog readout is mandatory to achieve the desired spatial resolution; the charge will be measured with “time-over-threshold” technique. Our plan to develop a new ASIC chip based on UMC-110nm technology with limited power consumption will be also presented. Summary Primary Authors: CIBINETTO, Gianluigi (INFN Ferrara) <cibinett(a)fe.infn.it> Co-authors: BETTONI, Diego (Universita di Ferrara (IT)) <diego.bettoni(a)cern.ch> FIORAVANTI, Elisa (INFN Ferrara) <fioravanti(a)fe.infn.it> GARZIA, Isabella (INFN) <garzia(a)fe.infn.it> SANTORO, Valentina (INFN Ferrara) <santoro(a)fe.infn.it> SAVRIE, Mauro (Universita di Ferrara (IT)) <savrie(a)fe.infn.it> BALDINI FERROLI, Rinaldo (Centro Studi e Ricerche 'Enrico Fermi') <baldini(a)centrofermi.it> BERTANI, Monica (Laboratori Nazionali di Frascati (LNF)-Istituto Nazionale Fisica) <monica.bertani(a)cern.ch> CALCATERRA, Alessandro (LNF-INFN) <acal(a)lnf.infn.it> FELICI, Giulietto (Laboratori Nazionali di Frascati (LNF)) <giulietto.felici(a)cern.ch> PATTERI, Piero (INFN LNF) <patteri(a)lnf.infn.it> ZALLO, Adriano (INFN LNF) <zallo(a)lnf.infn.it> BIANCHI, Fabrizio () <fabrizio.bianchi(a)to.infn.it> DESTEFANIS, Marco (INFN Turin) <destefan(a)to.infn.it> MAGGIORA, Marco (Univ. + INFN) <marco.maggiora(a)to.infn.it> MARCELLO, Simonetta (Universita' di Torino e INFN) <marcello(a)to.infn.it> Abstract presenters: CIBINETTO, Gianluigi Track classification: Sensors: 1c) Gaseous Detectors Presentation type: --not specified-- Comments:

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[Tipp2014] [Indico] New abstract submission: RUSCHKE, Alexander
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to RUSCHKE, Alexander: === Dear Alexander Ruschke, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=139&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: RUSCHKE, Alexander Submitted on: 31 January 2014 13:02 Title: The POSSUMUS-Detector Abstract content We present the newly developed Position Sensitive Scintillating Muon SiPM -Detector (POSSUMUS). This modular designed scintillation detector is capable to determine particle's position two-dimensional with resolution of a few mm for minimum ionizing particles. POSSUMUS is usable for large area trigger applications with few readout channels. The idea of this detector is to combine two trapezoidal shaped plastic scintillators to form one rectangular shaped scintillator rod. Each trapezoid in a rod is optically insulated against the other. In both trapezoids the scintillation light is collected by wavelength shifting fibers (WLS-fibers) and guided to Silicon-Photo-Multipliers (SiPM), where the light yield is detected. The SiPMs are located at opposite sites of each WLS-fiber, an automatic voltage adjustment allows for a stable gain of the detected light signals. Position resolution in the transverse direction is achieved by the geometric shape of the scintillators. The amount of light produced by incoming particles is proportional to their path length in the trapezoid and thus position dependent. The longitudinal position resolution, along the scintillator rod, is determined by the propagation time of light to either end of the rod. Because of its modularity, the POSSUMUS-detector can be used for trigger applications of different sizes with only few readout channels. By combining several scintillator rods, position sensitive areas from 100 cm2 to few m2 are achievable. In this talk we present a fully operating prototype of POSSUMUS, the multi-channel gain stabilization system for SiPMs and results for transverse and longitudinal position resolution Summary Primary Authors: RUSCHKE, Alexander (Ludwig-Maximilians-Univ. Muenchen (DE)) <alexander.ruschke(a)cern.ch> Co-authors: BIEBEL, Otmar (Ludwig-Maximilians-Univ. Muenchen (DE)) <otmar.biebel(a)cern.ch> HERTENBERGER, Ralf (Ludwig-Maximilians-Univ. Muenchen (DE)) <r.hertenberger(a)lmu.de> MULLER, Ralph (Ludwig-Maximilians-Univ. Muenchen (DE)) <ralph.mueller(a)cern.ch> Mr. GROSSMANN, Johannes (LMU) <johannes.grossmann(a)physik.uni-muenchen.de> Abstract presenters: RUSCHKE, Alexander Track classification: Sensors: 1d) Photon Detectors Presentation type: --not specified-- Comments:

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[Tipp2014] [Indico] New abstract submission: SIMON, Frank
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to SIMON, Frank: === Dear Frank Simon, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=138&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: SIMON, Frank Submitted on: 31 January 2014 12:58 Title: The Time Structure of Hadronic Showers in Analog and Digital Calorimeters confronted with Simulations Abstract content The intrinsic time structure of hadronic showers influences the timing capability and the required integration time of highly granular hadronic calorimeters for future collider experiments. To evaluate the influence of different active media and different absorbers, dedicated experiments with tungsten and steel hadron calorimeters of the CALICE collaboration have been carried out. These use plastic scintillator tiles with SiPM readout and RPCs, both arranged as 15 small detector cells read out with fast digitizers and deep buffers. The results of the studies provide detailed information on the time structure of hadronic showers, and are confronted with GEANT4 simulations to evaluate the realism of current hadronic shower models with respect to the time evolution of hadronic cascades. Summary Primary Authors: SIMON, Frank (Max-Planck-Institut fuer Physik) <frank.simon(a)cern.ch> Co-authors: Abstract presenters: SIMON, Frank Track classification: Sensors: 1a) Calorimetry Presentation type: --not specified-- Comments: Presentation on behalf of the CALICE collaboration, Speaker still to be confirmed

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[Tipp2014] [Indico] New abstract submission: MAEDA, Yosuke
by noreply-indico-team＠cern.ch 31 Jan '14

31 Jan '14

The following email has been sent to MAEDA, Yosuke: === Dear Yosuke Maeda, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/userAbstracts.py?confId=192695>. Status of your abstract: <https://indico.cern.ch/abstractDisplay.py?abstractId=137&confId=192695>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: MAEDA, Yosuke Submitted on: 31 January 2014 12:53 Title: Neutron-insensitive gamma-ray detector with aerogel for rare neutral-kaon decay experiment Abstract content A novel gamma-ray detector which is highly sensitive to photons but insensitive to neutrons was developed for the rare neutral-kaon decay experiment (KOTO experiment) at J-PARC. This experiment aims to study the KL->pi0nunubar decay with an electromagnetic calorimeter and hermetic veto detectors placed around a neutral with high neutron and kaon rates. The veto system requires a gamma-ray detector which should be located in the beam and able to detect gammas escaping there with high efficiency even under the large neutron flux of 500MHz. This detector consists of multiple modules of lead and aerogel pair. Incident gammas are converted to electrons and positrons in lead sheets and photons from their Cerenkov radiation in aerogel are viewed by photomultiplier tubes. Since protons or charged pions, which are mainly produced by neutrons, do not emit Cerenkov lights because of their small velocity, excellent blindness to neutrons can be achieved while keeping high photon detection efficiency around 99.9% for energy larger than 1 GeV. The half number of modules of the detector were installed and actually worked as an in-beam photon veto detector in the first physics data taking of the KOTO experiment. The detector operated stably during 1 week of data taking and expected performance on gamma-ray detection was confirmed as a result of evaluation using KL->3pi0 decay events. In this presentation, the design of this detector, stability and performance studies in the physics data taking, and the future prospects will be reported. Summary Primary Authors: MAEDA, Yosuke (Kyoto University) <maeda_y(a)scphys.kyoto-u.ac.jp> Co-authors: Abstract presenters: MAEDA, Yosuke Track classification: Sensors: 1e) Novel technologies Experiments: 2a) Experiments & Upgrades Presentation type: --not specified-- Comments:

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tipp2014 January 2014