tipp2014

tipp2014@nikhef.nl

1261 discussions

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

31 Jan '14

The following email has been sent to NAKAMURA, Katsuro: === Dear Katsuro Nakamura, 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=169&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: NAKAMURA, Katsuro Submitted on: 31 January 2014 17:56 Title: Development of a Data Acquisition System for the Belle II Silicon Vertex Detector Abstract content The Silicon Vertex Detector (SVD) is one of the main detectors in the Belle II experiment (KEK, Japan) which takes essential roles in the decay-vertex determination, low-energy-track reconstruction, and background rejection. The SVD consists of four layers of Double-sided Silicon Strip Detectors (DSSD) and is being developed toward the start of the Belle II experiment in 2016. Due to more than 220,000 strips in the whole SVD and the Belle II maximum trigger rate of 30 kHz, the integration of a large number of readout channels and the reduction of data size are challenging issues on the development of the SVD readout electronics. APV25 chips are employed to read the DSSD signals, and Flash-ADC (FADC) boards digitize and decode the outputs of the APV25s. To increase the integration density of the readout channels, one FADC board processes 48 APV25 outputs with one FPGA. The FPGA performs pedestal-subtraction, two-step common-mode correction, and zero-suppression for the sake of the data reduction. The development of the first prototype of the SVD readout system was completed in Dec. 2013, and the performance study of this system was done in an electron beam at DESY in Jan. 2014. In the beam test, the prototype system was implemented into the Belle II DAQ for the first time and the whole data-streaming was successfully operated. In this presentation, we will introduce features of the SVD readout system, and report on prototype performance results from the beam test, as well as future prospects for the Belle II experiment. Summary Primary Authors: NAKAMURA, Katsuro (KEK) <katsuro(a)post.kek.jp> Co-authors: BERGAUER, Thomas (HEPHY) <thomas.bergauer(a)oeaw.ac.at> CASAROSA, Giulia (INFN Pisa) <giulia.casarosa(a)pi.infn.it> FRIEDL, Markus (HEPHY) <markus.friedl(a)oeaw.ac.at> HARA, Koji (KEK) <koji.hara(a)kek.jp> HIGUCHI, Takeo (Kavli IPMU (WPI)) <takeo.higuchi(a)ipmu.jp> IRMLER, Christian (HEPHY) <christian.irmler(a)oeaw.ac.at> ITOH, Ryosuke (KEK) <ryosuke.itoh(a)kek.jp> KONNO, Tomoyuki (Tokyo Metropolitan Univ.) <konno(a)hepmail.phys.se.tmu.ac.jp> LIU, Zhen-an (IHEP) <liuza(a)ihep.ac.cn> NAKAO, Mikihiko (KEK) <mikihiko.nakao(a)kek.jp> NATKANIEC, Zbigniew (IFJ) <zbigniew.natkaniec(a)ifj.edu.pl> OSTROWICZ, Waclaw (IFJ) <waclaw.ostrowicz(a)ifj.edu.pl> PAOLONI, Eugenio (INFN Pisa and Univ. of Pisa) <eugenio.paoloni(a)pi.infn.it> SCHNELL, Michael (Univ. of Bonn) <schnell(a)physik.uni-bonn.de> SUZUKI Y., Soh (KEK) <soh.suzuki(a)kek.jp> THALMEIER, Richard (HEPHY) <richard.thalmeier(a)oeaw.ac.at> TSUBOYAMA, Toru (KEK) <toru.tsuboyama(a)kek.jp> YAMADA, Satoru (KEK) <satoru.yamada(a)kek.jp> YIN, Hao (HEPHY) <hao.yin(a)assoc.oeaw.ac.at> Abstract presenters: NAKAMURA, Katsuro Track classification: Data-processing: 3b) Trigger and Data Acquisition Systems Presentation type: --not specified-- Comments:

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

31 Jan '14

The following email has been sent to SFORZA, Federico: === Dear Federico Sforza, 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=168&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: SFORZA, Federico Submitted on: 31 January 2014 17:53 Title: Construction and test of high precision drift-tube (sMDT) chambers for the ATLAS muon spectrometer Abstract content For the upgrade of the ATLAS muon spectrometer in March 2014 new muon tracking chambers (sMDT) with drift-tubes of 15 mm diameter, half of the value of the standard ATLAS Monitored Drift-Tubes (MDT) chambers, and 10 $\mu m$ positioning accuracy of the sense wires have been constructed. The new chambers are designed to be fully compatible with the present ATLAS services but, with respect to the previously installed ATLAS MDT chambers, they are assembled in a more compact geometry and they deploy two additional tube layers that provide redundant track information. The chambers are composed of 8 layers of in total 624 aluminium drift-tubes. The assembly of a chamber is completed within a week. A semi-automatised production line is used for the assembly of the drift-tubes prior to the chamber assembly. The production procedures and the quality control tests of the single components and of the complete chambers will be discussed. The wire position in the completed chambers have been measured by using a coordinate measuring machine and cosmic ray muons tracks in a test stand with two MDT reference chambers. Summary New high precision drift-tube chambers with a tube diameter of 15 mm, a factor of two smaller than the standard Monitored Drift-Tube (MDT) chambers, have been developed for the upgrade of the ATLAS muon spectrometer in the 2013-2014 shutdown of the Large Hadron Collider at CERN. The new chambers consist of 624, 2.2 m long, aluminium drift tubes deployed in 8 layers, for a total with a width of 1.2 m, and an accuracy of 10 $\mu$m in the positioning of the sense wires. The new chambers operate with the same Ar:CO$_2$ (93:7) gas mixture at 3 bar pressure and the same read-out electronics as the present chambers. The tube layers with 78 drift tubes each are arranged in two multi-layers of 4 tube layers separated by a spacer frame containing an optical alignment system which monitors deformation with few micron precision. The smaller tube diameter allows for more tube layers and, therefore, more tracking redundancy and for about a factor 10 higher rate capability in the neutron and gamma ray environment of the ATLAS muon spectrometer. Extensive quality control tests are employed to ensure the high reliability of the detector. The drift tubes are assembled and tested prior to the chamber construction using semi-automated wiring and testing stations where the wire tension, HV leakage current and gas leak rate of each drift tube are measured, quality controlled, and stored in a database. The chamber is then assembled with a procedure that allows to complete a 4 layer sub-section of the chamber in less than two working days. After the assembly the geometry of the chamber is tested using a precision 3D-position measurement machine and a cosmic ray test facility with two MDT reference chambers with precisely known wire position and geometry. Primary Authors: KORTNER, Oliver (Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D) <okortner(a)cern.ch> KROHA, Hubert (Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D) <kroha(a)mppmu.mpg.de> SCHWEGLER, Philipp (Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D) <philipp.schwegler(a)cern.ch> SFORZA, Federico (Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D) <federico.sforza(a)cern.ch> Co-authors: Abstract presenters: SFORZA, Federico Track classification: Sensors: 1c) Gaseous Detectors Presentation type: --not specified-- Comments:

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

31 Jan '14

The following email has been sent to GERALIS, Theodoros: === Dear Theodoros Geralis, 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=167&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: GERALIS, Theodoros Submitted on: 31 January 2014 17:27 Title: A real x-y microbulk Micromegas with segmented mesh Abstract content We present for a first time, the development of Micromegas detectors based on Microbulk technology with segmented mesh. The space charge produced within the amplification volume induces both signals and the mesh strips provide the y coordinate while the anode strips the x coordinate. The manufacturing of a segmented mesh simplifies the x-y readout that up to now was produced in a complicated and delicate way due to the x-y strips formation (x-pads link in the front and y-pads link via through holes in the back plane) and had a high risk of deteriorating the detector quality or even damaging the detector in the last stages of construction. This R&D is a project supported by the RD51 collaboration. The design and manufacturing has been optimized and produced segmented mesh Microbulk Micromegas with excellent properties in Energy resolution, stability and good position resolution. We have designed appropriate FE-electronics for providing the bias HV to every individual mesh strip and reading it out. The design aims to an ultra low background, ultra low threshold detector appropriate for rare event searches, thanks to its low material budget that may further improve the excellent Microbulk technology background properties close to ~(few)x10-7 cnts/keV/cm2/s. We will present details of the design and the manufacturing of the segmented mesh microbulk, results on the detector performance, prospects for further improvements and possibilities that open for rare processes, neutron detection and other applications. We believe that this design constitutes a break-through in the Micro Pattern Gaseous Detectors developments. Summary Primary Authors: Dr. GERALIS, Theodoros (NCSR Demokritos) <geral(a)inp.demokritos.gr> Co-authors: Mr. AZNAR, Fransisco (University of Zaragoza) <faznar(a)unizar.es> Dr. IGUAZ, Fransisco J. (University of Zaragoza) <fjiguaz(a)gmail.com> Dr. DAFNI, Theopisti (University of Zaragoza) <tdafni(a)unizar.es> Dr. FERRER RIBAS, Esther (IRFU Sacaly) <esther.ferrer-ribas(a)cea.fr> Dr. PAPAEVANGELOU, Thomas (IRFU Sacaly) <thomas.papaevangelou(a)cea.fr> Dr. DAVENPORT, Martyn (CERN) <martyn.davenport(a)cern.ch> Dr. FERRY, Serge (CERN) <serge.ferry(a)cern.ch> Dr. DE OLIVEIRA, Rui (CERN) <rui.de.oliveira(a)cern.ch> Mr. KALAMARIS, Athanasios (NCSR Demokritos) <kalamaris(a)inp.demokritos.gr> Dr. KEBBIRI, Mariam (IRFU Saclay) <mariam.kebbiri(a)cern.ch> Abstract presenters: Dr. GERALIS, Theodoros Track classification: Sensors: 1c) Gaseous Detectors Presentation type: --not specified-- Comments:

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

31 Jan '14

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

31 Jan '14

The following email has been sent to LIU, Zhenan: === Dear Zhenan Liu, 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=165&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: LIU, Zhenan Submitted on: 31 January 2014 16:48 Title: Sharing high speed optical data transmission links with Slow Control stream Abstract content An unified overall readout and optical high speed data transmission, called Belle2link, has been designed for use between Front-End electronics of all sub-detectors and the backend data acquisition in the Belle II experiment at KEK, Japan. These links provide not only a good electrical isolation, but also a bidirectional centralized data collection and command distribution. Further more the capacity of the gigabit fiber is far more than be needed, which stimulated us a idea to share the high speed data link with the slow control function(detector parameters setting). In addition to the description of belle2link in TIPP2011, this talk describes in detail about the relization of this slow control, including parameter setting in frontend electronics, combining slow control data in FE part with and separating slow control data in BE part from detector physics data, data priority management, single command mode and batch commands mode implementation. Tests made with drift chamber and silicon vertex detector systems are provided together with results and discussions. Summary The Belle2link, an unified overall readout with optical high speed data transmission shared with slow control functionality of detector parameter control has been designed for the Belle II experiment at KEK, Japan. A model system based on drift chamber system was successful and tt has been accepted by the collaboration. System for Drift Chamber had passed with cosmic ray test and beam test, system for Silicon Virtex Detector is now under beam test at DESY, Germany which showed also a success. Implementation and tests to other systems are under going. Primary Authors: Prof. LIU, Zhen-an (IHEP) <liuza(a)ihep.ac.cn> Co-authors: Abstract presenters: Prof. LIU, Zhen-an Track classification: Sensors: 1e) Novel technologies Experiments: 2a) Experiments & Upgrades Data-processing: 3b) Trigger and Data Acquisition Systems Presentation type: --not specified-- Comments: co-authors to be added later

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

31 Jan '14

The following email has been sent to Prof. KLANNER, Robert: === Dear Robert Klanner, 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=164&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. KLANNER, Robert Submitted on: 31 January 2014 16:40 Title: Impact of Low-Dose Electron Irradiation on the Charge Collection of n+p Silicon Strip Sensors Abstract content The response of p+n strip sensors to electrons from a 90Sr source and focussed laser light with different wave lengths was measured using the ALiBaVa read-out system. The measurements were performed over a period of several weeks, during which a number of operating conditions were varied. The sensors were fabricated by Hamamatsu on 200 µm thick float-zone silicon. Their pitch is 80 µm, and both p-stop and p-spray isolation of the p+n strips were studied. The electrons from the 90Sr source were collimated to a spot with a full-width-at-half maximum of 1.8 mm at the sensor and the dose rate at the maximum in the SiO2 was about 0.6 mGy/s. The estimated dose at the end of the measurements was about 1 kGy in SiO2. In addition, test structures (pad diodes, MOS capacitors with and without p-stop and p-spray implants, and gate-controlled diodes) fabricated together with the sensors, were investigated for X-ray doses of up to 1 kGy in SiO2 in order to determine technological parameters and their dependencies on X-ray dose. As function of irradiation time with the 90Sr source significant changes in charge collection and charge sharing are observed. Annealing studies with temperatures up to 80°C have shown that the observed changes are only partially reversed. The observations are qualitatively explained with the help of TCAD simulations. The relevance of the measurements for the design and the use of p+n strip sensors in different radiation environments are discussed. Summary Primary Authors: Mr. KLANNER, Robert (University of Hamburg) <robert.klanner(a)desy.de> Co-authors: Abstract presenters: Mr. KLANNER, Robert Track classification: Sensors: 1b) Semiconductor Detectors Presentation type: --not specified-- Comments:

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

31 Jan '14

The following email has been sent to KOBAYASHI, Aine: === Dear Aine Kobayashi, 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=163&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: KOBAYASHI, Aine Submitted on: 31 January 2014 16:33 Title: Development of a Muon Polarimeter for the T-violation Search Experiment at J-PARC Abstract content TREK is a precision-frontier experiment, planned at J-PARC (Tokai, Japan), for a T-violation search in Kaon decays into the pi0 mu+ nu final state. The signature is a non-zero transverse polarization (P_T) of muons in the direction perpendicular to the decay plane. Using the same process the E246 experiment at KEK has set an upper limit on | P_T | < 0.0050 at the 90% confidence level. TREK is an upgrade of E246 with the goal of achieving more than a factor of 20 higher sensitivity using high intensity Kaon beam from J-PARC and the detector with major upgrades that include a new GEM tracker, new photon device for the CsI(Tl) calorimeter and a new magnet system providing uniform field. The most important element of TREK is the new muon polarimeter of novel design, incorporating an active muon stopper instrumented by an array of drift tubes for tracking. This design allows the tracks of muons and positrons to be reconstructed, providing a large acceptance for positrons with higher analyzing power, background suppression, and handles for controlling systematic uncertainties such as those arising from uncertainty on the decay position and its distribution. We present an overview of the TREK experiment and detail of the muon polarimeter R&D with results of studies using Monte Carlo simulation and beam tests of the full size prototype. Summary Primary Authors: KOBAYASHI, Aine (University of Tokyo (JP)) <aine.kobayashi(a)cern.ch> Co-authors: KAWAMOTO, Tatsuo (University of Tokyo (JP)) <tatsuo.kawamoto(a)cern.ch> IMAZATO, Jun (KEK) <jun.imazato(a)kek.jp> YOSHIHARA, Keisuke (University of Tokyo (JP)) <keisuke.yoshihara(a)cern.ch> Prof. SHIMIZU, Suguru (Osaka University(JP)) <suguru(a)phys.sci.osaka-u.ac.jp> Prof. IGARASHI, Youichi (KEK) <youichi.igarashi(a)kek.jp> Prof. YAMAZAKI, Hirohito (Tohoku University(JP)) <yamazaki(a)lns.tohoku.ac.jp> Prof. HASINOFF, Mike (University of British Columbia (CA)) <mike.hasinoff(a)cern.ch> Abstract presenters: KOBAYASHI, Aine Track classification: Sensors: 1c) Gaseous Detectors Experiments: 2a) Experiments & Upgrades Presentation type: --not specified-- Comments:

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

31 Jan '14

The following email has been sent to HAMAR, Gergoe: === Dear Gergoe Hamar, 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=162&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: HAMAR, Gergoe Submitted on: 31 January 2014 16:29 Title: High granularity scanner for MPGD based photon detectors Abstract content Gaseous detectors can be made sensitive to photons, and become excellent choice for applications such as Cherenkov radiation imaging for particle identification. Micopattern Gaseous Detector (MPGD) technologies opened new ways to photon detection, where the possibility for reduced ion feedback, better timing and the suppression of non-photon signals are factors of improved performance. On the other hand the microstructure of an MPGD renders the photo-electron emission, transfer and subsequent detection to be a very complex process. We have developed a high resolution UV photon scanner, where single photon-electron response measures local detection efficiency and gas gain with position resolution better than 100 microns. Studies on Thick GEM based photon detectors proved the existence of inefficient symmetry points, and shed light on hole-gain structure and microscale variance. In fact practically all MPGD detectors, even if not designed for photon detection in the first place, can be made sensitive, and thus be explored, by the scanning system. Measurement of the microsturcture of the charge transport can lead to a better understanding of the detection mechanisms, and help in optimization of various MPGD, especially for Cherenkov detectors. The presentaion will focus on details of the critical parts of such a system; and recent results on TGEM microstructure with its dependence on the applied micropattern configurations. Summary Primary Authors: HAMAR, Gergo (Wigner RCP, Budapest) <hamar.gergo(a)wigner.mta.hu> VARGA, Dezso (Wigner RCP, Budapest) <varga.dezso(a)wigner.mta.hu> Co-authors: Abstract presenters: HAMAR, Gergo Track classification: Sensors: 1c) Gaseous Detectors Presentation type: --not specified-- Comments:

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

31 Jan '14

The following email has been sent to D'AURIA, Saverio: === Dear Saverio D'Auria, 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=161&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: D'AURIA, Saverio Submitted on: 31 January 2014 16:26 Title: The Atlas SCT operation and performance Abstract content We report on the operation and performance of the ATLAS Semi-Conductor Tracker (SCT), which has been functioning for 3 years at the Large Hadron Collider at CERN. The SCT is constructed of 4088 silicon detector modules. We find 99% of the 6.3 million strips are operational, the noise occupancy and hit efficiency exceed the design specifications; the alignment is very close to the ideal to allow on-line track reconstruction and invariant mass determination. We will report on the operation and performance of the detector including an overview of the issues encountered. We observe a significant increase in leakage currents from bulk damage due to non-ionizing radiation which is in agreement with the predictions.We will also cover the time evolution of the key parameters of the strip tracker, including the evolution of noise and gain, the measurement of the Lorentz angle and the tracking efficiency in the harsh LHC environment. Valuable lessons for future silicon strip detector projects will be presented. Summary We propose a talk that summarizes the data-taking operations of the ATLAS Semi Conductor Tracker at the LHC, including the main difficulties we had to cope to, namely the failure of the optical transmitter on the readout board and the higher current of a subset of sensors. We have an updated determination of the radiation damage and we can show the performance of the SCT during tha LHC Run-1. The activities during the shutdown consist mostly in increasing the number of readout boards, to cope with a higher trigger rate. Primary Authors: ATLAS SCT COLLABORATION, Semi Conductor Tracker (ATLAS) <saverio.dauria(a)cern.ch> Co-authors: Abstract presenters: ATLAS SCT COLLABORATION, Semi Conductor Tracker Track classification: Sensors: 1b) Semiconductor Detectors Presentation type: --not specified-- Comments: It is ATLAS policy to design and ask the speaker only after a talk is accepted. Please contact the ATLAS-SCT speakers committee for any further information. If the session chair likes to focus the talk on some specific aspect of operation and performance we'd be happy to follow the indications.

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

31 Jan '14

The following email has been sent to WILSON, Fergus: === Dear Fergus Wilson, 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=160&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: WILSON, Fergus Submitted on: 31 January 2014 16:25 Title: Experimental results for the Cherwell 1 and 2 MAPS sensors Abstract content We report on the status and performance of the CMOS Monolithic Active Pixel Sensor (MAPS) Cherwell 1 and 2 sensors for the detection of charged particles in vertexing, tracking, and calorimetry applications. Cherwell is a 4-T CMOS sensor in 180 nm technology on a 12um epitaxial substrate with low-noise, low-power, in-pixel correlated double sampling, and high conversion gain. Cherwell 1 consists of four arrays, two optimized for vertexing and tracking applications, and two for digital calorimetry applications. The vertexing arrangements have a matrix of 96x48 pixels with a pitch of 25 um. The “reference array” is readout on a rolling shutter base with a fine resolution 12-bit, single-slope column parallel ADC. The “strixel" array has the readout and ADC circuits embedded in the space between the pixel diodes. The two sections for calorimetry have a matrix of 96x48 pixels with 25 um pitch and 48x24 pixels with 50 um pitch, respectively. Additional circuitry is added to provide charge summing of 2x2 pixels during readout. Cherwell 2 is a prototype candidate sensor to be used in the upgrade of the ALICE Inner Tracker System at the LHC. It has three variants of a 128x128 pixel array on a 20um pitch using the strixel technology. We report on the characterisation and performance of the prototypes, on the test bench and at the test beam. Summary Performance of two prototype CMOS MAPS sensors. Primary Authors: WILSON, Fergus (STFC - Rutherford Appleton Lab. (GB)) <fergus.wilson(a)stfc.ac.uk> Co-authors: BEVAN, Adrian (University of London (GB)) <a.j.bevan(a)qmul.ac.uk> TURCHETTA, Renato (ral-stfc) <renato.turchetta(a)stfc.ac.uk> LEMMON, Roy Crawford (STFC Daresbury Laboratory (GB)) <roy.crawford.lemmon(a)cern.ch> VELTHUIS, Jaap () <jaap.velthuis(a)bristol.ac.uk> Abstract presenters: WILSON, Fergus Track classification: Sensors: 1b) Semiconductor Detectors Presentation type: --not specified-- Comments:

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