tipp2014

tipp2014@nikhef.nl

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[Tipp2014] [Indico] New abstract submission: MOLLO, Carlos Maximiliano
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to MOLLO, Carlos Maximiliano: === Dear Carlos Maximiliano Mollo, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/271/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: MOLLO, Carlos Maximiliano Submitted on: 25 February 2014 17:09 Title: feasibility study of a 3-inch Vacuum Silicon Photo Multiplier Tube Abstract content The Vacuum Silicon PhotoMultiplier Tube (VSiPMT) is an innovative design that we proposed for the first time at the 11th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD08) in Siena, triggering deep discussions on the feasibility of the device itself and on the convenience of such an idea. The basic idea is to replace the classical dynode chain of a PMT with a SiPM, which acts as an electron multiplying detector. Such a solution will match the goal of a large photocathode sensitive area with the performances of a SiPM. In this work we will present the feasibility study of a 3-inch VSiPMT. The work was based mainly on the electron beam focus on the SiPM surface. As will be shown, the linearity and the efficiency of the VSiPMT can be affected by poor electron focusing on the MPPC. For this reason, the focusing system requires special attention with the respect of classical PMTs. It will be presented COMSOL simulations of a possible solution for the electron beam focusing trying to keep the external dimensions of the device similar to those of a classical 3-inch PMT. Summary A feasibility study of a 3-inch Vacuum Silicon Photo Multiplier Tube Introduction The Vacuum Silicon PhotoMultiplier Tube (VSiPMT) is an innovative design that we propose the first time at the 11th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD08) in Siena, triggering deep discussions on the feasibility of the device itself and on the convenience of such an idea. The basic idea is to replace the classical dynode chain of a PMT with a SiPM, which acts as an electron multiplying detector. Such a solution will match the goal of a large photocathode sensitive area with the performances of a SiPM. This will lead to many advantages such as lower power consumption, mild sensitivity to magnetic fields and high quantum efficiency. The feasibility of this idea has been thoroughly studied both from a theoretical and experimental point of view. As a first step we performed the full characterization of a special non-windowed Hamamatsu MPPC with a laser source. The response of the SiPM to an electron beam was studied as a function of the energy and of the incident angle by means of a Geant4-based simulation. After this firsts results Hamamatsu accepted to considered the idea and built, expressly for us, two prototypes for testing purposes. In this work, we present some results of the full characterization of the first two prototypes of VSiPMT. Both devices exhibit very attractive features, such as low power consumption, weak sensitivity to magnetic fields, high resolution in the pulses height giving so excellent photon counting capability. owever, the two prototypes made by Hamamatsu presents a photocathode of only 3 mm in diameter. In order, for these innovative devices, to be competitive, compared to traditional PMT (e.g. in areas such as underwater neutrino telescopes or dark matter search experiments), it was necessary to study the feasibility of a 3-inch VSiPMT. This study was based mainly on the electron beam focus on the SiPM surface. As will be shown, the linearity and the efficiency of the VSiPMT can be affected by poor electron focusing on the MPPC. For this reason, the focusing system requires special attention with the respect of classical PMTs. Will be present COMSOL simulations (figure 3) of a possible solution for the electron beam focusing trying to keep the external dimensions of the device similar to those of a classical 3-inch PMT. We are confident that the realization of the VSiPMT will start a revolutionary generation of photo- detectors for near‐future applications. Moreover, fields like medical equipment, physical checkup and diagnosis (e.g. Radioimmunoassay and Enzyme immunoassay), biomedicine, environmental measurement equipment, oil well logging, all will require further improvements in photon detection performances, as linearity, gain, quantum efficiency improvement and single photon counting capability. We believe that the proposed device has the potential to fulfill these requirements. Primary Authors: MOLLO, Carlos Maximiliano (INFN) <maximil(a)na.infn.it> Co-authors: Abstract presenters: MOLLO, Carlos Maximiliano Track classification: Sensors: 1d) Photon Detectors Presentation type: --not specified-- Comments:

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[Tipp2014] [Indico] New abstract submission: VIVOLO, Daniele
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to VIVOLO, Daniele: === Dear Daniele Vivolo, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/270/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: VIVOLO, Daniele Submitted on: 25 February 2014 16:36 Title: Test on VSiPMT prototypes Abstract content Vacuum Silicon PhotoMultiplier Tube (VSiPMT) is an innovative photodetector based on the combination of SiPM and PMT technologies. The basic idea consists in replacing the classical dynode chain of a PhotoMultiplier Tube with a SiPM. Such a design was proposed by our group in order to match the goal of a large photocathode sensitive area with the unrivalled photon counting performances of SiPMs. Moreover, much more improvements with respect to the standard PMT technology are expected to be obtained by VSiPMTs. First of all, the absence of the standard dynode chain will lead to avoid using voltage dividers and, hence, to a much lower power consumption. Transit Time Spread is expected to be sensibly reduced, since there will be no dynode chain spread, while Single Photoelectron resolution and gain stability will be much improved. In the proposed configuration, the SiPM acts as an electron multiplying detector. Therefore, the proof of feasibility of VSiPMT has required a thorough study both from a theoretical and experimental point of view. The extremely encouraging results obtained by our group led us to a new, advanced phase, consisting in the test of some VSiPMT prototypes realized by Hamamatsu. Our results show that VSiPMT prototypes performances go far beyond our expectations, thus charting the course for the development of an unrivalled innovative photon detection technology. In the present work we will describe accurately the results of our tests on Hamamatsu prototypes and we will show our studies and our purposes for the optimization of the device. Summary The detection of (single) photons is an essential experimental tool for a wide range of research areas. To date, in astroparticle physics experiments based on Cherenkov detectors a crucial role has been played by photomultiplier tubes. PMT technology has been improved continuously in the last years: the quantum efficiency of the photocathode has now reached a level of 40%, close to the theoretical maximum; single photon sensitivity and time resolution have been improved by a careful design of electrostatic focusing on the 1st dynode; with new coatings the secondary electron yield of dynodes has greatly improved, reducing the required number of dynodes and their size. Nevertheless standard photomultiplier tubes suffer the following drawbacks: • fluctuations in the first dynode gain make single photon counting difficult; • linearity is strongly related to the gain and decreases as the latter increases; • transit time spreads over large fluctuations; • mechanical structure is complex, voluminous, rather massive and expensive; • they are sensitive to magnetic fields. Moreover, in low background experiments the radioactivity of the photomultiplier components is a key concern. In fact, in many applications PMTs can dominate the total radioactivity of the detector. A significant effort is being made by manufacturers and research teams in order to reduce the background from photomultiplier tubes by rigorous choice of the raw materials used for all components. However, significant traces of radioactive nuclei are encountered in the metal and ceramic parts of the electron multiplication system. Hybrid photodetectors, not using dynode structures for amplification, are an attractive solution. In fact, in this type of device photoelectrons emerging from the photocathode are focused onto a silicon detector. As silicon is virtually free of radioactivity and the mass of the photodiode can be very small, the background from the inner part of the tube can be significantly reduced. The Vacuum Silicon PhotoMultiplier Tube (VSiPMT) is an innovative photodetector based on the combination of SiPM and PMT technologies. The basic idea consists in replacing the classical dynode chain of a PhotoMultiplier Tube with a SiPM. Such a design was proposed by our group in order to match the goal of a large photocathode sensitive area with the unrivalled photon counting performances of SiPMs. Moreover, much more improvements with respect to the standard PMT technology are expected to be obtained by VSiPMTs. First of all, the absence of the standard dynode chain will lead to avoid using voltage dividers and, hence, to a much lower power consumption. Transit Time Spread is expected to be sensibly reduced, since there will be no dynode chain spread, while Single Photoelectron resolution and gain stability will be much improved. Differently from standard hybrids based on APDs, in the VSiPMT the HV between the photocathode and the silicon device is limited to 2-4 kV. Moreover, this HV is needed for the transportation of the photoelectrons and to make them overcome the SiO2 coating layer covering the SiPM. Therefore, the photoelectrons need a much lower voltage to be detected by a SiPM. The multiplication given by the SiPM is independent of the kinetic energy of the photoelectrons, as the output signal of a SiPM is independent of the number of electrons/holes created by the photoelectron in the same cell and is instead proportional to the number of cells fired. Several studies have been performed in last years by the INFN Napoli group on this subject. On the base of the very encouraging results obtained by our group, a first prototype of the VSiPMT has been developed in collaboration with Hamamatsu and tested in our labs. The measured performances are extremely encouraging. The work function of the VSiPMT has been evaluated showing a good linearity with satisfactory gain output G=(3÷6)·105. This prototype showed extremely good photon counting capabilities thanks to the very good performance in terms of SPE resolution (<17%), peak-to-valley ratio (> 60) and Transit Time Spread (< 0.5 ns). With an optimized design, the VSiPMT will exhibit several attractive features such as: • excellent single photon detection; • high gain; • small electron amplification system size; • negligible power consumption; • low radioactivity background; • weak dependence on magnetic fields; • small price with respect to PMTs; • good performance at low temperature. In this work we will provide an accurate description of the prototypes and of the extremely encouraging results of our tests. Moreover, we will show our studies and our purposes for the optimization of the device. Primary Authors: VIVOLO, Daniele () <vivolo(a)na.infn.it> Co-authors: Prof. BARBARINO, Giancarlo (Università degli studi di Napoli - Federico II and INFN Naples) <barbarino(a)na.infn.it> Dr. BARBATO, Felicia Carla Tiziana (Università degli studi di Napoli - Federico II and INFN Naples) <barbato(a)na.infn.it> DE ASMUNDIS, Riccardo (Universita e INFN (IT)) <riccardo.de.asmundis(a)cern.ch> DE ROSA, Gianfranca (INFN) <gianfranca.derosa(a)na.infn.it> FIORILLO, Giuliana (Universita e INFN (IT)) <giuliana.fiorillo(a)cern.ch> MIGLIOZZI, Pasquale (Universita e INFN (IT)) <pasquale.migliozzi(a)cern.ch> MOLLO, Carlos Maximiliano (INFN) <maximil(a)na.infn.it> ROSSI, Biagio (Laboratorium fuer Hochenergiephysik-Universitaet Bern-Unknown) <biagio.rossi(a)cern.ch> Abstract presenters: VIVOLO, Daniele Track classification: Sensors: 1d) Photon Detectors Presentation type: Oral Comments:

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[Tipp2014] [Indico] New abstract submission: KAGAN, Harris
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to KAGAN, Harris: === Dear Harris Kagan, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/269/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: KAGAN, Harris Submitted on: 25 February 2014 15:39 Title: Recent results of diamond radiation tolerance Abstract content Progress in experimental particle physics in the coming decade depends crucially upon the ability to carry out experiments at high energies and high luminosities. These two conditions imply that future experiments will take place in very high radiation areas. In order to perform these complex and perhaps expensive experiments new radiation hard technologies will have to be developed. Chemical Vapor Deposition (CVD) diamond has been developed as a radiation tolerant material for use very close to the interaction region where detectors must operate in extreme radiation conditions. During the past few years many CVD diamond devices have been manufactured and tested. As a detector for high radiation environments CVD diamond benefits substantially from its radiation hardness, very low leakage current, low dielectric constant, fast signal collection and ability to operate at room temperature. As a result CVD diamond has now been used extensively in beam conditions monitors at every experiment in the LHC. In addition, CVD diamond is now being considered as a sensor material for particle tracking detectors closest to the interaction region where the most extreme radiation conditions exist. We will present the present state-of-the-art of polycrystalline CVD diamond and single crystal CVD diamond and the latest results on the radiation tolerance of these materials for a range of protons, pions and neutrons obtained from strip detectors constructed with these materials. Summary Primary Authors: KAGAN, Harris (Ohio State University (US)) <harris.kagan(a)cern.ch> Co-authors: TRISCHUK, William (University of Toronto (CA)) <william.trischuk(a)cern.ch> OTHER, Members Of Rd42 (The RD42 Collaboration) <rd42(a)cern.ch> Abstract presenters: KAGAN, Harris TRISCHUK, William OTHER, Members Of Rd42 Track classification: Sensors: 1b) Semiconductor Detectors Sensors: 1e) Novel technologies Experiments: 2a) Experiments & Upgrades Presentation type: Oral Comments: If selected for presentation, the RD42 collaboration will provide a speaker. Abstract submitted on behalf of the full collaboration by the Spokespersons.

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[Tipp2014] [Indico] New abstract submission: KRIEGER, Peter
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to KRIEGER, Peter: === Dear Peter Krieger, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/268/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: KRIEGER, Peter Submitted on: 25 February 2014 15:23 Title: Upgraded readout and trigger electronics for the ATLAS liquid argon calorimeters for future LHC running Abstract content The ATLAS Liquid Argon (LAr) calorimeters produce almost 200K signals that must be digitized and processed by the front-end and back-end electronics at every triggered event. Additionally, the front-end electronics sums analog signals to provide coarse-grained energy sums to the first-level (L1) trigger system. The current design was optimized for the nominal LHC luminosity of 10$^{34}$cm$^{-2}$s$^{-1}$. However, in future higher-luminosity phases of LHC operation, the luminosity (and associated pile-up noise) will be 3-7 times higher. An improved spatial granularity of the trigger primitives is therefore proposed, in order to improve the trigger performance at high background rejection rates. For the first upgrade phase in 2018, new LAr Trigger Digitizer Boards are being designed to receive the higher granularity signals, digitize them on-detector and send them via fast optical links to a new digital processing system (DPS). This applies digital filtering and identifies significant energy depositions in each trigger channel. The refined trigger primitives are transmitted to the L1 system, allowing extraction of improved trigger signatures. This talk will present the concept for the upgraded readout and describe the components being developed for the new system. R&D activities as well as architectural and performance studies will be described, as will details of the on-going design of mixed-signal front-end ASICs, radiation tolerant optical-links, and the high-speed FPGA-based DPS units. These studies also guide the way towards the second upgrade phase, in which all LAr Calorimeter read-out electronics must be replaced due to radiation damage, ageing, and a new ATLAS trigger scheme. Summary Primary Authors: KRIEGER, Peter (University of Toronto (CA)) <krieger(a)physics.utoronto.ca> Co-authors: Abstract presenters: KRIEGER, Peter Track classification: Sensors: 1a) Calorimetry Data-processing: 3b) Trigger and Data Acquisition Systems Presentation type: Oral Comments: I am submitting this abstract on behalf of the ATLAS Liquid Argon Calorimeter group, in my role as the Chair of our speakers committee. I have identified myself as the presenter, above, since this is necessary for abstract submission. The actual speaker will be identified only after the abstract has been accepted. Please let me know if this poses any problems.

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[Tipp2014] [Indico] New abstract submission: KRIEGER, Peter
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to KRIEGER, Peter: === Dear Peter Krieger, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/267/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: KRIEGER, Peter Submitted on: 25 February 2014 15:14 Title: Performance of the ATLAS liquid argon calorimeter after three years of LHC operation Abstract content The ATLAS Liquid Argon (LAr) calorimeter is a unique device employing novel detector technologies and geometries to provide precision barrel and endcap electromagnetic calorimetry in the pseudorapidity region |η|<3.2, endcap hadronic calorimetry in the range 1.5<|η|<3.2, and forward calorimetry in the region 3.1<|η|<4.9. The electromagnetic calorimeters use lead as passive material and are characterized by an accordion geometry that allows a fast and uniform response without azimuthal gaps. Copper and tungsten were chosen as passive material for the hadronic calorimetry; while a classic parallel-plate geometry was adopted at large polar angles, an innovative design based on cylindrical electrodes with thin liquid argon gaps is employed for the coverage at low angles, where the particle flux is higher. All detectors are housed in three cryostats maintained at about 88.5K. The approximately 200,000 cells are read out via front-end boards housed in on-detector crates that also contain calibration, trigger and timing boards. The talk will focus on the design and performance of the detector during the first three years of LHC operation, during which approximately 27 fb$^{-1}$ of pp collision data were collected at centre-of-mass energies of 7-8 TeV. Throughout this period, the calorimeter consistently operated with performances very close to specifications, with a data-taking efficiency greater than 99% in 2012. The high efficiency is in part due to sophisticated data monitoring infrastructure designed to quickly identify issues that would degrade the detector performance, to ensure that only the best quality data are used for physics analysis. Summary Primary Authors: Prof. KRIEGER, Peter (University of Toronto, Dept. of Physics) <krieger(a)physics.utoronto.ca> Co-authors: Abstract presenters: Prof. KRIEGER, Peter Track classification: Sensors: 1a) Calorimetry Presentation type: Oral Comments: I am submitting this abstract on behalf of the ATLAS Liquid Argon Calorimeter group, in my role as the Chair of our speakers committee. I have identified myself as the presenter above, since this was required for submission of the abstract. The actual speaker will be identified only after the talk has been accepted. Please let me know if this poses any problems.

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[Tipp2014] [Indico] New abstract submission: HORI, Masaki
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to HORI, Masaki: === Dear Masaki Hori, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/266/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: HORI, Masaki Submitted on: 25 February 2014 14:34 Title: Attempt at laser spectroscopy of pionic helium atoms at PSI Abstract content Metastable pionic helium atoms $\pi{\rm He}^+$ are heretofore hypothetical three-body Coulomb systems composed of a helium nucleus, an electron occupying the 1s ground state, and a $\pi^-$ occupying a Rydberg state, with principal and orbital angular momentum quantum numbers of around $n\sim\ell+1=16$ [1-2]. The atom has been conjectured to explain the apparent metastability of $\pi^-$ observed in liquid helium bubble chambers in the 1960's [3-6]. The atoms are believed to retain nanosecond-scale lifetimes against $\pi^-$ absorption in the helium nucleus. The new PiHe collaboration of Paul Scherrer Institute attempts to carry out laser spectroscopy of this atom. By measuring the transition frequencies of this atom, and comparing the results with three-body QED calculations, the $\pi^-$ mass can in principle be determined to high precision [7], as was done recently for antiprotonic helium atoms [8]. In this poster, we describe the status of the experimental setup and laser systems that will be used in this experiment. The method for resolving the laser resonance transition relies on detecting the nuclear fragments that emerge from the experimental target when the laser is in resonance with the atom. [1] G.T. Condo, Phys. Lett. 9, 65 (1964). [2] J.E. Russell, Phys. Rev. Lett. 23, 63 (1969). [3] J.G. Fetkovich and E.G. Pewitt, Phys. Rev. Lett. 11, 290 (1963). [4] M.M. Block et al., Phys. Rev. Lett. 11, 301 (1963). [5] O.A. Zaimidoroga et al., Sov. Phys. JETP 25, 63 (1967). [6] S.N. Nakamura et al., Phys. Rev. A 45, 6202 (1992). [7] M. Hori, A. Sótér, and V.I. Korobov, submitted to Physical Review A [8] M. Hori et al., Nature 475, 484 (2011). Summary Primary Authors: HORI, Masaki (Max Planck Institute of Quantum Optics) <mhori(a)nucl.phys.s.u-tokyo.ac.jp> Co-authors: SÓTÉR, Anna (Max Planck Institute of Quantum Optics) <anna.soter(a)cern.ch> AGHAI-KHOZANI, Hossein (Max-Planck Institute of Quantum Optics) <h.aghai(a)cern.ch> DAX, Andreas Josef (Paul Scherrer Institute) <andreas.dax(a)psi.ch> BARNA, Dani (CERN and University of Tokyo) <daniel.barna(a)cern.ch> Prof. HAYANO, Ryugo (University of Tokyo) <ryugo.hayano(a)cern.ch> YAMADA, Hiroyuki (University of Tokyo) <hiroyuki.yamada(a)cern.ch> MURAKAMI, Yohei (University of Tokyo) <yohei.murakami(a)cern.ch> TODOROKI, Koichi (University of Tokyo) <koichi.todoroki(a)cern.ch> Abstract presenters: HORI, Masaki Track classification: Experiments: 2a) Experiments & Upgrades Presentation type: Poster Comments:

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[Tipp2014] [Indico] New abstract submission: MACHEFERT, Frederic
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to MACHEFERT, Frederic: === Dear Frederic Machefert, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/265/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: MACHEFERT, Frederic Submitted on: 25 February 2014 13:45 Title: Upgrade of the LHCb calorimeters Abstract content The LHCb collaboration foresees a major upgrade of the detector for the high luminosity run that will take place after the LS2 shut-down. Apart from the increase of the instantaneous luminosity at the interaction point of the experiment, one of the major ingredients of this upgrade is a full readout at 40MHz of the sub-detectors and the acquisition of the data by a large farm of PC. The trigger will be done by this farm and should increase the overall trigger efficiency with respect to the current detector, especially in hadronic B meson decays. A general overview of the modifications foreseen to the calorimeter system, concerning the geometry, the electronics, the reconstruction and the monitoring will be given. The expected performances will be described and the integration of the electromagnetic and hadronic calorimeters in the new upgraded scheme will be presented. Summary The LHCb detector is located on the ring of the LHC accelerator at CERN. The fields of research of the collaboration are CP violation, charm physics and rare decays of the B meson. More than $3\rm{fb}^{-1}$ have been recorded since the LHC start-up, mainly in 2011 and 2012. The data quality permitted to make important measurements. The $B_s$ meson decay in a pair of muons and other new decays of the $B_s$ have been observed, the $B_c$ mass has been measured with the best precision ever, etc\ldots The performances of the detector are very satisfactory although the beam conditions have been far more aggressive than what was foreseen during the design period. The pile-up was roughly 1.7 in 2012, in spite of the expected nominal conditions foreseen to be 0.4 during the installation of the detector. The confidence of the collaboration in the detector justified those conditions, the gain in statistics being larger than the relative degradation of the data quality due to the higher number of collisions per crossing. Since a few years, the upgrade of the LHCb detector is being prepared in order to improve the measurements in major areas of flavor physics and to reach ultimately the theoretical uncertainties in several fields. The upgrade will take place during the long shut-down LS2 and will permit to increase the instantaneous luminosity up to $2 \times 10^{33}\rm{cm}^{-1}.\rm{s}^{-1}$. All the sub-detectors are affected by this upgrade. The pile-up leads to some drastic modifications of the tracking and particle identification systems. But, the most important modification concerns the first hardware trigger (L0) which will be removed. A pure software trigger, more efficient and more flexible, will remain. The suppression of the L0 implies that each sub-detector sends its data at 40MHz to the computer farm on which the trigger program is running. Estimations of the impact of the software trigger (not considering the increase of luminosity) show that the event yield should be more than doubled in B meson hadronic decays (the improvement could be larger for high multiplicity final states with up to 6 charged particles), after the suppression of the present hardware trigger. The first level trigger will disappear, but part of its electronics can be re-used and adapted in order to reduce the bandwidth at the input of the PC farm. The purpose here is not to limit the bandwidth systematically at a fixed rate like the L0 does, but to reduce the bandwidth between 1 and 40 MHz, depending on the needs and altogether to enrich the sample. The reasons for such a Low Level Trigger (LLT) are a possible stagging of the size of the PC farm at LHC start-up or an occasional problem on the farm. The calorimeter system of LHCb will evolve by reducing its complexity, the present scintillating pad detector and the preshower will be removed, their disappearance being compensated by the future software trigger and the improved tracking system. The module performances will be affected by radiations. Irradiation tests have been done either in beam or by putting modules in the LHC tunnel for several years. The results of those measurements will be presented. Some of the cells in the inner region (the closest to the beam pipe) will most probably be replaced during LS3. The calorimeter of LHCb, like the other sub-detectors must adapt its electronics (common to the electromagnetic and hadronic calorimeters) to the new running conditions of the upgrade. The consequences of the upgrade for the electronics are: the readout of the data is done at 40MHz; the gain of the PMT is reduced by a factor 5 in order to keep them alive during the high luminosity run, this reduction is compensated by an increase of the gain of the electronics (without increase of the noise with respect to the present system); the calorimeter implementation of the first level trigger is adapted to the new low level trigger. This implies the design of a new front-end electronics. A fraction of the existing system will be kept: the crates, the backplanes, some of the power supplies. The front-end and control boards will be removed and the architecture will be revised. The architecture will consists in acquiring 32 PMT per front-end board. The analog electronics should be made either from on an ASIC component or a system based on "commercial-off-the-shelf" (COTS) components. The shaping and integration of the signal in the two concurrent techniques are very different but give comparable performances. After the sampling of the output of the analog part of the front-end electronics, FPGA will be used to perform several operations : baseline subtraction, calibration of the signal for the low level trigger, event building, \ldots The output bandwidth of each front-end board will reach 20 Gbits/s. 5 Optical links driven by GBT components, designed at CERN, are used: 4 for the data acquisition path and 1 to send the low level trigger information to the counting room. A front-end crate will contain up to 16 boards, the middle slot of each crate being filled by a control board. This card receives from the counting room the clock, the slow control signals and the fast (synchronous) commands of the experiment and propagates them to the backplane and finally to the front-end boards. The control board will receive or emit the signals (slow control, commands, clock) through a bi-directional link based on the GBT system. One of the particularity of the calorimeter electronics is its location: on the gentry which is just above the calorimeter itself. Radiation levels in this region are high and extra safety precautions are essential to protect the electronics against the cumulated dose and the single event effects. Commercial components should be tested in beam in order to guarantee their usage in such conditions; the ASIC is designed with specific conception techniques; flash-based FPGA will be used in the digital part of the electronics, etc\ldots Prototypes for the analog part (both ASIC and COTS) and the digital part exist. They have been tested with a spare ECAL module at CERN in an electron beam. The performances obtained from the data are close to the expected ones and a few modifications are foreseen in order to obtain a fully satisfactory design. Peripheral systems permit to follow continuously the performances or to control the functioning of the calorimeter. These include the electronics providing high-voltage to the photo-multipliers, the pulsing system for the LED or the radioactive source based calibration of the hadronic calorimeter. A fraction of it can be kept as is or simply adapted in order to be able to receive (like the new control board described above) its slow control or clock signals and commands from the LHCb time and fast control system, through the GBT driven optical links. Primary Authors: MACHEFERT, Frederic (Universite de Paris-Sud 11 (FR)) <frederic.machefert(a)cern.ch> Co-authors: Abstract presenters: MACHEFERT, Frederic Track classification: Experiments: 2a) Experiments & Upgrades Presentation type: Oral Comments:

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[Tipp2014] [Indico] New abstract submission: NISHIMURA, Miki
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to NISHIMURA, Miki: === Dear Miki Nishimura, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/264/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: NISHIMURA, Miki Submitted on: 25 February 2014 10:45 Title: A Pixelated Positron Timing Counter with Fast Plastic Scintillator Readout by SiPMs for the MEG-II Experiment Abstract content The MEG experiment searches for the charged lepton flavor violation, $\mu$ $\rightarrow$ e$\gamma$ decay, with an unprecedented sensitivity which is expected to occur in the context of the new physics beyond standard models. The upgrade of the experiment (MEG-II) is planned to improve the sensitivity by another order of magnitude with a higher beam intensity and improved detector performance. The pixelated timing counter to precisely measure the positron time consists of several hundreds of small counters, each of which is a plastic scintillator plate readout by several SiPMs at both ends. The SiPMs at each end are connected in series to reduce the sensor capacitance and thus to make the waveform sharper for a better time resolution. In the pixelated timing counter, the signal positron will pass through several counters. A proper averaging of the measured positron times over the several hit counters will give an overall time resolution much better than the single counter resolution. The overall time resolution is expected to be 30-35ps, which is almost twice better than that of the present timing counter. The pixelated configuration will also help to suppress the pileup under the high rate environment in MEG-II. The status and prospects of the R&D studies on this new timing counter are presented. We optimized the configuration of the single counter and obtained a resolution of 50-70ps (RMS) for the single counter. The beam test result with several counters will be also discussed. We obtained the expected good resolution with 8 counters. Summary Primary Authors: NISHIMURA, Miki (The University of Tokyo) <nmiki(a)icepp.s.u-tokyo.ac.jp> Co-authors: Abstract presenters: NISHIMURA, Miki Track classification: Sensors: 1d) Photon Detectors Presentation type: Oral Comments:

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[Tipp2014] [Indico] New abstract submission: DE MARCO, Nora
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to DE MARCO, Nora: === Dear Nora De Marco, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/263/>. 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 MARCO, Nora Submitted on: 25 February 2014 10:29 Title: Performance of the Zero Degree Calorimeters of ALICE at LHC Abstract content The Zero Degree Calorimeters (ZDC) of ALICE consist of two sets of neutron and proton calorimeters, located 112.5 m away from the interaction point, complemented by two small forward electromagnetic calorimeters. In this talk the ZDC performance in Pb-Pb collisions at √sNN = 2.76 TeV will be discussed, focusing on event selection capabilities, event centrality and event plane determination. Additionally, the ZDC system operated as the ALICE luminometer, providing in particular the first measurement of neutron emission in electromagnetic dissociation of Pb nuclei at the LHC. The performance of the ZDC detector in the p-Pb data taking at √sNN = 5.02 TeV will also be shown, in particular its use as centrality estimator. Finally, the R&D activities in view of the future runs will be presented. Summary Primary Authors: Dr. DE MARCO, Nora (Sezione INFN, Turin, Italy) <demarco(a)to.infn.it> Co-authors: Abstract presenters: Dr. DE MARCO, Nora Track classification: Sensors: 1a) Calorimetry Presentation type: Oral Comments: The talk is presented on behalf of the ALICE Collaboration.

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[Tipp2014] [Indico] New abstract submission: TRISCHUK, William
by noreply-indico-team＠cern.ch 25 Feb '14

25 Feb '14

The following email has been sent to TRISCHUK, William: === Dear William Trischuk, The submission of your abstract has been successfully processed. Abstract submitted: <https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts>. Status of your abstract: <https://indico.cern.ch/event/192695/call- for-abstracts/262/>. See below a detailed summary of your submitted abstract: Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics Submitted by: TRISCHUK, William Submitted on: 25 February 2014 07:18 Title: Diamond particle detectors systems in high energy physics Abstract content With the first three years of the LHC running complete, ATLAS and CMS are planning to upgrade their innermost tracking layers with more radiation hard technologies. Chemical Vapor Deposition (CVD) diamond is one such technology. CVD diamond has been used extensively in beam condition monitors as the innermost detectors in the highest radiation areas of BaBar, Belle, CDF and all LHC experiments. This talk will describe the lessons learned in constructing the ATLAS Beam Conditions Monitor (BCM), Diamond Beam Monitor (DBM) and the CMS Pixel Luminosity Telescope (PLT) all of which are based on CVD diamond with the goal of elucidating the issues that should be addressed for future diamond based detector systems. The talk will also present the first beam test results of prototype diamond devices with 3D detector geometry that should further enhance the radiation tolerance of this material. Summary Primary Authors: TRISCHUK, William (University of Toronto (CA)) <william.trischuk(a)cern.ch> Co-authors: KAGAN, Harris (Ohio State University) <kagan(a)mps.ohio-state.edu> OTHER, Members Of (The RD42 Collaboration) <rd42(a)cern.ch> Abstract presenters: TRISCHUK, William KAGAN, Harris OTHER, Members Of Track classification: Sensors: 1b) Semiconductor Detectors Experiments: 2a) Experiments & Upgrades Presentation type: Oral Comments: If selected for presentation, the RD42 collaboration will provide a speaker. Abstract submitted on behalf of the full collaboration by the spokespeople

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