tipp2014

tipp2014@nikhef.nl

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[Tipp2014] [Indico] New abstract submission: LEVORATO, Stefano
by noreply-indico-team＠cern.ch 01 Feb '14

01 Feb '14

The following email has been sent to LEVORATO, Stefano: === Dear Stefano Levorato, 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=179&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: LEVORATO, Stefano Submitted on: 01 February 2014 09:51 Title: MPGD-based counters of single photons for Cherenkov imaging counters. Abstract content Architectures based on MicroPattern Gas Detectors (MPGD) represent a possible answer to the quest for novel gaseous counters with single photon detection capability able to overcome all the limitations of the present generation of gaseous photon detectors. In Cherenkov imaging counters, gaseous photon detectors are still the unique option when insensitivity to magnetic field, low material budget, and affordable costs in view of large detection surfaces are required. A systematic R&D programme has been performed for several years to develop novel gas photon detectors base on an arrangement of multiple layers of THick-Gas Electron Multipliers (THGEM): a deep understanding of the THGEM characteristics has been achieved and their parameters have been optimised in view of the photon detection application. Large gains are required to detect effectively single photoelectrons and, after the optimisation process, the novel detectors exhibit electrical stability up to gains as high as to 1-2 x 105 also in presence of radioactive backgrounds. The delicate aspect of the photoelectron extraction from a GEM-like photocathode has been studied in detail and conditions for effective extraction have been obtained. The suppression of the signal produced by ionising particles crossing the photon detectors has been proven. In parallel with establishing the detector principle, the engineering towards large-size counters is ongoing and an intermediate size detector with 300 x 300 mm2 active surface has been successfully operated. Recently a new hybrid approach has been considered: an architecture where the last multiplication stage is obtained by using a Micromegas arrangement. The completed R&D studies and the engineering aspects are summarised and the characterization of the hybrid detector prototypes are reported. Summary Nowadays, the Cherenkov imaging technique for Particle IDentification (PID) has been established as a robust, reliable experimental approach thanks to the use in several experiments. They are used and foreseen in the experimental apparata of several future research programmes. The effectiveness of visible and UV single photon detection is at the basis of the success of these counters. So far, only vacuum-based detectors and gaseous photon detectors have been adopted. Other photon detectors being developed are interesting only for applications in the far future. Gaseous photon detectors are still the only available option to instrument detection surfaces when insensitivity to magnetic field, low material budget, and affordable costs in view of large detection surfaces are required. The present generation of gaseous photon detectors, namely MWPC where a cathode plane is formed by a Printed Circuit Board (PCB) segmented in pads and coated with a CsI film, adopted in several experiments (NA44, HADES, COMPASS, STAR, JLab-HallA and ALICE) exhibit some performance limitations: ageing, causing a severe decrease of the quantum efficiency after a collected charge of the order of some mC/cm2, feedback pulses with a rate increasing at large gain-values, and long recovery time (about 1 day) after an occasional discharge in the detector. These limitations are related to the photon feedback from the multiplication region and to the bombardment of the CsI photocathode film by the positive ions generated in the multiplication process. They impose to operate at low gain (a few times 104), resulting in two relevant consequences: the efficiency of single photoelectron detection is reduced and rate limitations are present. Moreover, in these detectors the signal formation is intrinsically slow. There is a clear quest for novel gaseous photon detectors with advanced characteristics, namely intrinsically fast signals and reduced photon and ion backflow to operate at larger gains and to ensure longer detector life-time. In a multilayer structure of electron multipliers, the photons from the multiplication process cannot reach the photocathode and a good fraction of the ions is trapped in the intermediate layers. The signal is mainly due to the electron motion, namely its development is fast. GEM-based photon detectors coupled to semi transparent or reflective photocathodes have been proposed shortly after the introduction of the GEM concept. The threshold Cherenkov counter Hadron Blind Detector (HBD) of the PHENIX experiment at BNL RHIC represents the first application of these ideas, even if high gain is not required in a threshold counter. THich GEMs (THGEM), introduced in parallel by several groups about ten years ago, are electron multipliers derived from the GEM design, by scaling the geometrical parameters and changing the production technology. Large gains and good rate capabilities have been reported for detectors with single or double THGEM layers. THGEMs can be produced in large series and large size at moderate cost with standard PCB technology, in spite of the large number of holes: some millions per square meter. THGEMs have intrinsic mechanical stiffness, and they are robust against damages produced by electrical discharges. Moreover, thanks to the reduced gaps between the multiplication stages, these detectors can be successfully used in magnetic field. The basic architecture of the THGEM-based photon detector that we propose consists in multiple, typically triple, THGEM layers, where the top face of the first layer is coated with a CsI film and acts as a reflective photocathode. The electron multiplication takes place in the THGEM holes thanks to the dipole electric field obtained biasing the two PCB faces. A plane of drift wires defines the drift electric field above the first THGEM layer. The field between two THGEM layers acts as a transfer field; an induction field is applied between the bottom face of the last THGEM and the anode electrode. The signals are collected at the anode plane, formed by a PCB segmented in pads. Our R&D studies performed using single and multiple THGEM arrangements to detect ionising particles or UV photons in laboratory and test beam exercises have been dedicated to explore the characteristics of the THGEM multipliers and the role of the various geometrical parameters, and to establish the guidelines towards the optimisation of the basic architecture. More than 50 different small size THGEM samples (30 x 30 mm2) have been characterised. The measurement campaigns have been accompanied by simulation studies. The main outcomes are summarised in the following. • The rim is the clearance ring around the holes. The THGEM maximum gain is increased by more than an order of magnitude by adopting large rims, namely annulus width of the order of 100 μm. These THGEMs exhibit relevant gain dependence versus rate and over time. These gain variations are absent or negligible for no rim or small rim THGEMs. On the basis of these facts, we have selected THGEM with the minimum rim imposed by the production technology to remove the drilling residuals at the hole edge, namely annulus width smaller than 10 μm. • The large gains ensured by sizable rims can be recovered by increasing the THGEM thickness up to 0.8-1 mm: these thickness-values are ideal for the second and third THGEM layers. • The time response is satisfactory: the typical resolution obtained with THGEM-AGPs is 7 ns r.m.s.. • Concerning photoelectron extraction efficiency from the CsI photoconverting layer, it is clearly established that the effective extraction rate depends on the gas atmosphere in the detector and requires an electric field ≥ 1000 V/cm at the photocathode surface. At the THGEM surface, the electric field is dominated by the THGEM bias and it has a minimum at the critical point, namely the centre of the equilateral triangle, which is the unit cell of the THGEM pattern. Higher electric fields at the critical point can be obtained by reducing the THGEM thickness and values around 0.3-0.4 mm are selected: this is the thickness suggested for the photocathode THGEM. • Photon backflow from the multiplication region to the photocathode plane is almost totally suppressed; ion backflow rate depend on the geometry details; in prototypes with staggered hole alignment it is lower than 10 %. • Triple THGEM configurations can provide gains up to 106 when detecting single photoelectrons; the gain has to be reduced in radioactive environments. This gain reduction is made less severe by applying appropriate voltage bias in front of the photocathode to suppress the ionising particle signal: the novel detectors can operate at gains at least one order of magnitude larger than the present ones. In conclusion, the THGEM-based photon detectors can satisfy all the requirements posed to overcome the limitation of the present gaseous photon detectors. In parallel with establishing the detector principle, the engineering towards large-size counters is ongoing. An essential goal of the project is to provide large size detectors with minimal dead zones while preserving the optimised characteristics obtained within the R&D studies. Some samples of good quality large size THGEMs (600 x 600 mm2) have been produced proving the feasibility of large boards. The voltages applied to the electrodes can be as high as 8 kV. Minimum dead zones can be obtained with an accurate mechanical design and the correct choice of the materials for the detector vessel, and appropriate HV distribution to the many electrodes. The goal is a dead area below 10%. An intermediate size detector with 300 x 300 mm2 active surface satisfying this prescription has been successfully operated. Recently a new hybrid approach has been considered: an architecture where the last multiplication stage is obtained by using a Micromegas arrangement. Stable operation at large gain (> 106) has been obtained detecting single photons. The hydrid detector has recently been characterized. The R&D studies and the engineering aspects are summarised; the characterization of the hybrid architecture prototypes is also reported. Primary Authors: LEVORATO, Stefano (INFN Trieste) <stefano.levorato(a)ts.infn.it> Co-authors: Abstract presenters: LEVORATO, Stefano Track classification: Sensors: 1c) Gaseous Detectors Sensors: 1d) Photon Detectors Presentation type: --not specified-- Comments:

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[Tipp2014] [Indico] New abstract submission: BADALOV, Alexey
by noreply-indico-team＠cern.ch 01 Feb '14

01 Feb '14

The following email has been sent to BADALOV, Alexey: === Dear Alexey Badalov, 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=178&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: BADALOV, Alexey Submitted on: 01 February 2014 05:44 Title: Gaudi GPU Manager Abstract content During the second long shutdown in 2017, the beam will undergo an intensity increase. This will place an increased load on the hardware, necessitating an upgrade. One potentially very cost-effective way to add computational power would be to replace some of the CPU cores with graphics processing units or other modern many-core hardware. A number of people is currently working on GPU versions of algorithms used for tracking and reconstruction. We focus on the infrastructure required to integrate these algorithms with the computational framework used at LHCb. We describe the challenges standing in the way of tapping massively parallel computation and our accomplishments in overcoming them. Summary Primary Authors: BADALOV, Alexey (University of Barcelona (ES)) <alexey.badalov(a)cern.ch> Co-authors: CAMPORA PEREZ, Daniel Hugo (CERN) <daniel.hugo.campora.perez(a)cern.ch> VILASIS CARDONA, Xavier (University of Barcelona (ES)) <xavier.vilasis.cardona(a)cern.ch> NEUFELD, Niko (CERN) <niko.neufeld(a)cern.ch> Abstract presenters: BADALOV, Alexey Track classification: Data-processing: 3b) Trigger and Data Acquisition Systems Presentation type: --not specified-- Comments:

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[Tipp2014] [Indico] New abstract submission: Prof. GAN, Kock Kiam
by noreply-indico-team＠cern.ch 01 Feb '14

01 Feb '14

The following email has been sent to Prof. GAN, Kock Kiam: === Dear Kock Kiam Gan, 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=177&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: Prof. GAN, Kock Kiam Submitted on: 01 February 2014 04:08 Title: 10 Gb/s Radiation-Hard VCSEL Array Driver Abstract content Planned upgrades to the LHC at CERN will increase its energy and luminosity. These advancements will require increasing the optical data communication bandwidth to fully exploit the accelerator and detector upgrades. This require much increased per-fiber output data rates of up to 10 Gb/s. While 10 Gb/s optical links are mature in industry, as yet there are none that have sufficient radiation hardness for the most challenging HEP deployments. We will present results from an R&D project to produce a radiation-hard VCSEL driver ASIC capable of 10 Gb/s operation per-channel. Commercial VCSEL arrays operating at 10 Gb/s are now readily available and have been proven to be radiation-hard in previous studies. Thus, the ultimate goal of the R&D is to develop an ASIC that contains a 12-channel array of 10 Gb/s VCSEL drivers. However, at this stage in our R&D we are targeting fabrication of a preliminary four-channel test chip in a 65 nm CMOS process. The four channels in the ASIC will be used to qualify the performance and radiation hardness of different driver topologies before settling on a preferred topology for the 12-channel ASIC. The ASIC will include an 8-bit DAC and band gap reference to be used for remotely controlling the VCSEL bias and modulation currents. We will present the circuit designs of the four-driver topologies included within the ASIC along with results from extracted layout simulations. Summary Primary Authors: Prof. GAN, Kock Kiam (Ohio State University (US)) <gan(a)mps.ohio-state.edu> Co-authors: Abstract presenters: Prof. GAN, Kock Kiam Track classification: Data-processing: 3a) Front-end Electronics Data-processing: 3b) Trigger and Data Acquisition Systems Data-processing: 3c) Embedded software Presentation type: --not specified-- Comments: Oral presentation is requested in order to be authorized for travel.

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[Tipp2014] [Indico] New abstract submission:
by noreply-indico-team＠cern.ch 01 Feb '14

01 Feb '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=176&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 23:38 Title: Calibrating photon detection efficiency in IceCube Abstract content The IceCube neutrino observatory is composed of more than five thousand Digital Optical Modules (DOMs), installed on the surface and at depths between 1500 and 2500 m in clear ice at the South Pole. Each DOM incorporates a 10” diameter photomultiplier tube (PMT) intended to detect light emitted when high energy neutrinos interact with atoms in the ice. Depending on the energy of the neutrino and the distance from debris particle tracks, PMTs can be hit by up to several thousand photons. The number of photons per PMT and their time distribution is used to reject background events and to determine the energy and direction of each neutrino. The detector energy scale was established with good precision independent of lab measurements on DOM optical sensitivity, based on light yield from stopping muons and calibration of ice properties. A laboratory setup has now been developed to more precisely measure the DOM optical sensitivity as a function of angle and wavelength. DOM sensitivities are measured in water using a broad beam of light whose intensity is measured with a NIST calibrated photodiode. This study will refine the current knowledge of IceCube response and lay a foundation for future precision upgrades to the detector. Summary Primary Authors: WENDT, Christopher (UW Madison / WIPAC) <chris.wendt(a)icecube.wisc.edu> TOSI, Delia (UW Madison / WIPAC) <delia.tosi(a)icecube.wisc.edu> Co-authors: Abstract presenters: WENDT, Christopher TOSI, Delia Track classification: Sensors: 1d) Photon Detectors Experiments: 2c) Detectors for neutrino physics Presentation type: --not specified-- Comments: The abstract should appear as "Christopher Wendt and Delia Tosi for the IceCube Collaboration"

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

31 Jan '14

The following email has been sent to TECCHIO, Monica: === Dear Monica Tecchio, 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=175&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: TECCHIO, Monica Submitted on: 31 January 2014 22:02 Title: The Data Acquisition System for the KOTO detector Abstract content The goal of KOTO experiment at J-PARC is to discover and measure the rate of the rare decay KL -> pi0-nu-nubar, for which the Standard Model predicts a branching ratio of (2.4 +/- 0.4)x10E-11 . The experiment is a follow-up to E391 at KEK with a completely new readout electronics, trigger and data acquisition system. The KOTO DAQ comprises a front-end 14-Bit, 125MHz ADC board and a two-level hardware trigger electronics. The ADC board injects the frontend detector signals into a low pass filter before digitization. The digitized pulses are stored inside a 4 μs deep pipeline while waiting for the first level trigger decision, based on a minimum energy deposition in the CsI calorimeter in anti-coincidence with signals in veto detectors. Data is then buffered inside a L2 trigger board, which calculates the center-of-energy of the event. Data accepted by the second level trigger board is read out via a front panel 1Gb Ethernet port into a computer cluster through a network switch using UDP protocol. After several commissioning runs in 2011 and 2012, KOTO has taken the first physics run in May 2013. We will review the performance of the DAQ during this run as well as plans to upgrade the clock distribution system and the overall trigger hardware connectivity. Finally we present a redesign of the Level 2 trigger and readout electronics able to accommodate the increase in data rate expected in the next few years. Summary Primary Authors: XU, Jia (University of Michigan) <jiaxu(a)umich.edu> SHARMA, Arjun (University of Chicago) <arjunsharmatejinc(a)uchicago.edu> Co-authors: TECCHIO, Monica (University of Michigan) <tecchio(a)umich.edu> CAMPBELL, Myron (High Energy Physics) <myron(a)umich.edu> AMEEL, Jon (U) <sivaluna(a)umich.edu> SUJIYAMA, Yasuyuki (Osaka University) <sugiyama(a)champ.hep.sci.osaka-u.ac.jp> CARRUTH, Celeste (University of Michigan) <cceleste(a)umich.edu> WHALLON, Nikola (University of Michigan) <alokin(a)umich.edu> SU, Stephanie (University of Michigan) <stephsu(a)umich.edu> MICALLEF, Jessica (University of Michigan) <jessimic(a)umich.edu> HUTCHESON, Melissa (University of Michigan) <melhutch(a)umich.edu> CAI, Tejin (University of Chicago) <tejinc(a)uchicago.edu> SHARMA, Arjun (University of Chicago) <arjunsharma(a)uchicago.edu> Abstract presenters: XU, Jia Track classification: Data-processing: 3b) Trigger and Data Acquisition Systems Presentation type: --not specified-- Comments:

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[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=174&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 20:08 Title: performance of 2nd generation CALICE ASICs (HARDROC, MICROROC, SKIROC & SPIROC) Abstract content In the framework of CALICE, EUDET and AIDA programs, technological prototypes for ILC calorimetry have been developped. They rely dout ASIC on highly integrated readout ASICs to perform signal readout, auto-trigger and energy measurement over several millions of channels. Ultra-low power is achieved thanks to power pulsing, which must maintain calorimetric performance. The chips developped for the various types of calorimeters (RPCs, Micromegas, Si diodes or SiPMs) have now been tested extensively on test bench and test beam and the most sallient features will be presented. Summary Primary Authors: DE LA TAILLE, Christophe (OMEGA Ecole Polytechnique & CNRS/IN2P3) <taille(a)in2p3.fr> Co-authors: Mr. DULUCQ, Frederic (OMEGA-Ecole Polytechnique-CNRS/IN2P3) <fdulucq(a)in2p3.fr> CALLIER, Stéphane (OMEGA / IN2P3 - CNRS) <callier(a)lal.in2p3.fr> MARTIN CHASSARD, Gisele (OMEGA (FR)) <gisele.martin.chassard(a)cern.ch> SEGUIN-MOREAU, Nathalie (Universite de Paris-Sud 11 (FR)) <nsmoreau(a)in2p3.fr> Mr. RAUX, Ludovic (OMEGA Ecole Polytechnique & CNRS/IN2P3) <raux(a)lal.in2p3.fr> Abstract presenters: Mr. RAUX, Ludovic Track classification: Sensors: 1a) Calorimetry Presentation type: --not specified-- Comments:

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

31 Jan '14

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

31 Jan '14

The following email has been sent to SANTONICO, Rinaldo: === Dear Rinaldo Santonico, 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=172&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: SANTONICO, Rinaldo Submitted on: 31 January 2014 18:13 Title: New materials for the RPCs of the next future Abstract content RPCs presently working in many accelerator and cosmic ray experiments are made up with resistive plates of phenolic laminate (improperly referred to as “bakelite”) or glass. They are operated with gas mixtures mostly constituted of C2H2F4, i-C4H10, and small amounts of SF6. In the next future however all these materials should be reconsidered for different reasons. Indeed for the resistive plates a mechanically more stable material than phenolic laminate would be of great interest to improve the RPC performance and a lower resistivity glass would also be crucial to improve the glass-RPC rate capability. Concerning the gas, an alternative to the use of C2H2F4 will be needed to reduce the environment impact (measured by the GWP) and possibly the cost of the present gas mixtures. Finally new types of front end electronics, which should be considered as an intrinsic part of the detector, will be crucial for any further development. A last relevant point in the search for new materials will be the cooperation with the industry, not only for the procurement of the items needed for the RPC construction but also in the perspective that some new RPC application could be of interest even outside of the Particle Physics community. The proposed talk will focus the present situation concerning the search for new materials for the RPCs to be developed in the next future. Summary Primary Authors: SANTONICO, Rinaldo (Universita e INFN Roma Tor Vergata (IT)) <rinaldo.santonico(a)roma2.infn.it> Co-authors: PAOLOZZI, Lorenzo (Universita e INFN Roma Tor Vergata (IT)) <lorenzo.paolozzi(a)cern.ch> DI STANTE, Luigi (Dipartimento di Fisica(RomaII)) <luigi.di.stante(a)cern.ch> PASTORI, Enrico (INFN Univ. di Roma II) <enrico.pastori(a)roma2.infn.it> LIBERTI, Barbara (Universita e INFN Roma Tor Vergata (IT)) <barbara.liberti(a)roma2.infn.it> CARDARELLI, Roberto (Universita e INFN Roma Tor Vergata (IT)) <roberto.cardarelli(a)roma2.infn.it> AIELLI, Giulio (Universita e INFN Roma Tor Vergata (IT)) <giulio.aielli(a)cern.ch> DI CIACCIO, Anna (Universita e INFN Roma Tor Vergata (IT)) <anna.di.ciaccio(a)cern.ch> Dr. CAMARRI, Paolo (University of Roma "Tor Vergata") <camarri(a)roma2.infn.it> Abstract presenters: SANTONICO, Rinaldo Track classification: Sensors: 1c) Gaseous Detectors Presentation type: --not specified-- Comments:

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

31 Jan '14

The following email has been sent to Dr. WOODY, Craig: === Dear Craig Woody, 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=171&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: Dr. WOODY, Craig Submitted on: 31 January 2014 18:04 Title: Design Studies of the Electromagnetic and Hadronic Calorimeters for sPHENIX Abstract content The PHENIX Experiment at RHIC is planning a series of major upgrades that will transform the current PHENIX detector into a new detector, sPHENIX, which will be used to carry out a systematic measurement of jets in heavy ion collisions in order to study the phase transition of normal nuclear matter to the Quark Gluon Plasma near its critical temperature. The baseline design of sPHENIX will utilize the former BaBar solenoid magnet and incorporate two new calorimeters, one electromagnetic (EMCAL) and another hadronic (HCAL), that will be used to measure jets in the central region. The calorimeters will cover a region of ±1.1 in pseudorapidity and 2pi in phi, and will result in a factor of 6 increase in acceptance over the present PHENIX detector. The HCAL will be first hadronic calorimeter ever used in an experiment at RHIC and will enable this first comprehensive study of jets in heavy ion collisions. It will be based on scintillator plates interspersed between steel absorber plates that are read out using wavelength shifting fibers. It will have a total depth of ~ 5 Labs that will be divided into two longitudinal sections, and will have an energy resolution ~ 50%/√E for single particles and <100%/√E for jets. The EMCAL will be a tungsten-scintillating fiber design, and will have a depth of ~ 17 X0 and an energy resolution of ~ 15%/√E. Both calorimeters will be read out using silicon photomultipliers and waveform digitizing electronics. In addition, it is planned to add a preshower detector in front of the EMCAL that will consist of ~ 2 X0 of tungsten absorbers and silicon strip detectors in order to improve electron and single photon identification. This talk will discuss the detailed design of both calorimeters and the preshower, and the construction of the first prototypes of each of these devices. These prototypes were recently tested in a test beam at Fermilab and the first preliminary results of those tests will be presented. A discussion of additional upgrade plans that will transform sPHENIX into ePHENIX, which will be a detector for a future Electron Ion Collider at Brookhaven, will be discussed in a separate contribution to this conference. Summary The PHENIX Collaboration is planning a series of major new upgrades that will transform the current PHENIX detector at RHIC into a new, multipurpose detector that will be used to carry out a systematic study of jets in heavy ion collisions in order to study the Quark Gluon Plasma near its critical temperature, and to study polarized electron-hadron and electron-ion collisions at a future Electron Ion Collider at Brookhaven. The first in this series of upgrades is sPHENIX, which will utilize the BaBar solenoid magnet and instrument it with two new calorimeters, one electromagnetic and one hadronic, that will have full azimuthal coverage and cover 2.2 units of rapidity, thereby increasing the current PHENIX acceptance by a factor of six. The sPHENIX hadron calorimeter will be the first hadronic calorimeter ever used in an experiment at RHIC, and will enable the first study of jets at RHIC that utilizes a complete jet energy measurement. The evolution of sPHENIX to ePHENIX, which will be a new detector for eRHIC, will be described in a separate contribution to this conference. The hadronic calorimeter will be a steel plate and scintillating tile design that is read out with wavelength shifting fibers and silicon photomultipliers (SiPMs). It will incorporate a novel design feature where the steel plates are oriented parallel to the beam direction so that they also function as the flux return for the magnet. This results in the steel plates being wedged shaped and that the sampling fraction changes with depth. However, the calorimeter will be divided into two longitudinal compartments, which allows the measurement of the longitudinal center of gravity of the shower, and thereby an event by event correction for the longitudinal shower fluctuations. It will be divided roughly into 1/3 for the front section and 2/3 for the back section, and each section will oriented at a small angle with respect to the incoming particles. Scintillating tiles are interspersed between the steel plates and read out using wavelength shifting fibers. The fibers are bundled and read out using 3x3 mm3 silicon photomultiplers (SiPMs) which operate in the fringe field of the solenoid magnet. The EMCAL will be a tungsten plate and scintillating fiber design with the plates and fibers oriented approximately along the incoming particle direction, as in the HCAL. In order to prevent channeling of particles through the calorimeter (i.e., particles that could only interact in the scintillator), the plates and fibers will either be tilted at a small angle with respect to the incoming particle, as in the HCAL, or the plates and fibers will have an accordion structure that will prevent any direct particle path through the scintillator. The fibers are brought to the back of the calorimeter where the light is collected by an array of light collecting cavities that form the readout towers and direct the light onto SiPMs. The EMCAL will have a Moliere radius ~ 2 cm and a radiation length ~ 7 mm. Both calorimeters will use the same SiPMs and readout electronics, thereby simplifying the combined calorimeter design and resulting in an overall cost savings. The SiPM signals are amplified by custom designed preamplifiers that provide feedback for correcting the bias voltage to compensate for gain variations with temperature. An LED monitoring system is also incorporated for gain monitoring and calibration. The signals are digitized using flash ADC electronics that was used for a previous PHENIX detector. There have been detailed design and simulation studies for both the EMCAL and HCAL and prototypes of both calorimeters have been constructed. These prototypes will be tested in a test beam at Fermilab in February 2014 where their actual performance properties will be measured. In addition, we plan to test a prototype of a silicon-tungsten preshower that would go in front of the EMCAL in the sPHENIX detector. This talk will describe the detailed design of both calorimeters and the preshower, including Monte Carlo simulations, and will discuss the first results from the prototype beam tests. Primary Authors: KISTENEV, Edouard (Department of Physics) <kistenev(a)bnl.gov> Co-authors: Abstract presenters: KISTENEV, Edouard Track classification: Sensors: 1a) Calorimetry Presentation type: --not specified-- Comments: This talk is related to a separate submission for an overview talk on the future upgrade plans for PHENIX

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

31 Jan '14

The following email has been sent to Dr. WOODY, Craig: === Dear Craig Woody, 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=170&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: Dr. WOODY, Craig Submitted on: 31 January 2014 17:58 Title: Future Upgrades for the PHENIX Experiment at RHIC: From sPHENIX to ePHENIX Abstract content The PHENIX Experiment at RHIC is planning a series of major upgrades that will enable a comprehensive measurement of jets in relativistic heavy ion collisions, provide enhanced physics capabilities for studying nucleon-nucleus and polarized proton collisions, and allow a detailed study of electron-nucleus collisions at a future Electron Ion Collider (eRHIC) at Brookhaven. These upgrades will include a number of major new detector systems. The first stage, sPHENIX, will utilize the former BaBar solenoid magnet and will include two new large calorimeters, one electromagnetic and another hadronic, for measuring jets in heavy ion collisions. These calorimeters will cover a region of ±1.1 in pseudorapidity and 2pi in phi, and will result in a factor of 6 increase in acceptance over the present PHENIX detector. Plans are also being developed to add a preshower detector in front of the electromagnetic calorimeter and additional tracking inside the magnet. The current RHIC schedule would allow the installation of sPHENIX to take place starting around 2017-2018 and begin taking data ~2020. Following this, RHIC would be transformed into an Electron Ion Collider and additional detectors would be added to sPHENIX to convert it to ePHENIX which would serve as a detector for eRHIC. This would involve adding additional tracking in the form of a central TPC and a system of GEM trackers, a high resolution crystal endcap calorimeter, a forward electromagnetic and hadronic calorimeter, and a set of particle id detectors, including a DIRC, a gas RICH and an aerogel detector. This talk will discuss the evolution of the current PHENIX detector to sPHENIX and ePHENIX, the R&D that is being pursued to develop the various detectors that will be needed, and the opportunities and challenges for each of their technologies. A separate contribution to this conference will describe the central electromagnetic and hadronic calorimeters for sPHENIX, including results from a recent beam test of prototypes of both of these detectors at Fermilab. Summary The PHENIX Experiment has been running at RHIC since 2000 and has accumulated a wealth of data on relativistic heavy ion collisions, nucleon-nucleus collisions and polarized proton collisions. It is one of the major RHIC experiments that contributed to the discovery of the Quark Gluon Plasma and is still in operation today. It has been focused on the systematic study of the QGP near its critical temperature using a variety of different probes, but questions such as how and why the quark-gluon plasma behaves as a perfect fluid in the vicinity of strongest coupling (near 1–2 Tc) can only be fully addressed with jet observables at RHIC energies which probe the medium over a variety of length scales. Comparing these measurements with ones probing higher temperatures at the LHC will provide valuable insight into the thermodynamics of QCD. PHENIX in its present form covers roughly half of the full azimuthal acceptance and 0.7 units of rapidity with a suite of different detectors, including an electromagnetic calorimeter. In order to increase this coverage for a complete systematic study of jets, the PHENIX Collaboration is proposing a new upgraded detector, sPHENIX, that will utilize the former BaBar solenoid magnet and instrument it with two new calorimeters, one electromagnetic and one hadronic, that will cover the full azimuth and 2.2 units of rapidity. The hadronic calorimeter will be a steel plate and scintillating tile design that is read out with wavelength shifting fibers and silicon photomultipliers (SiPMs). The EMCAL will be a tungsten-scintillating fiber design that will also be read out using SiPMs. There are also plans to add a silicon-tungsten preshower detector in front of the EMCAL. The initial tracking system for sPHENIX will utilize the existing PHENIX silicon vertex detector, and will add additional silicon tracking layers in the future. The current plan is to run with the existing PHENIX detector through 2016 followed by the installation of sPHENIX in 2017. Data taking with sPHENIX would begin ~ 2020 and last 2-3 years. This would then be followed by the transition of RHIC to an Electron Ion Collider (eRHIC), which would collide electrons, initially up to 10 GeV, with hadrons up to 250 GeV and heavy ions up to 100 GeV/A. eRHIC will allow a detailed study of the spin and momentum structure of the nucleon, an investigation of the onset of gluon saturation in heavy nuclei, and the study of hadronization in cold nuclear matter. sPHENIX will also be transformed into a new enhanced detector, ePHENIX, that will provide the necessary capabilities to study this new physics. This will include the addition of a high resolution crystal calorimeter in the electron going direction and a forward spectrometer in the hadron going direction. The forward spectrometer will consist of an EMCAL and HCAL, similar in design to the central sPHENIX calorimeters, along with a gas RICH that utilizes a photosensitive GEM detector and an aerogel Cherenkov detector. The central region will be augmented with a fast drift TPC with a GEM readout and full azimuthal coverage a DIRC detector. Additional GEM trackers will also be added to the central, forward and backward going regions. The plan would be for eRHIC and ePHENIX to start taking data sometime in the mid to late 2020’s. This talk will describe the long range plans for RHIC and the PHENIX detector, but will focus mainly on the new detectors and technologies that are planned for sPHENIX and ePHENIX. The two new calorimeters for sPHENIX have already undergone considerable design and prototypes of each detector have been constructed. These prototypes will be tested at Fermilab in February 2014 and preliminary results from these tests should be available by the time of the conference. The calorimeters and the test results will be described in a separate contribution to the conference. Primary Authors: Dr. WOODY, Craig (Brookhaven National Lab) <woody(a)bnl.gov> Co-authors: Abstract presenters: Dr. WOODY, Craig Track classification: Experiments: 2a) Experiments & Upgrades Presentation type: --not specified-- Comments: Request Overview Talk This talk will also reference a separate talk on the sPHENIX calorimeters

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