Implementation of the dead-time free F1 TDC in the COMPASS detector readout

Fischer, H.; Franz, J.; Grünemaier, A.; Heinsius, F. H.; Hennig, Lars; Königsmann, K.; Niebuhr, Marc; Schmidt, Th.; Schmitt, H.; Urban, Heinz

doi:10.1016/s0168-9002(00)01285-7

Cited by 45 publications

(15 citation statements)

References 2 publications

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“…3) are arranged to intercept four arcs of the focused Cherenkov light emitted by the hemispherical quartz radiator traversed by beam particles. The trigger system consists of scintillator signal coincidences ensuring that a beam particle has crossed the radiator and the read out electronic is based on the CMAD front end chip and the F1 TDC chip used for the COMPASS experiment [10,11]. In central part of Fig.…”

Section: Photo-electron Extraction From the Csi Layermentioning

confidence: 99%

Detection of single photons with THickGEM-based counters

Alexeev

Barbosa

Birsa

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tCherenkov imaging counters requiring large photosensitive areas, the capability to stand high rates and to operate in magnetic field environments could benefit from the use of photon detectors based on THick Gaseous Electron Multiplier (THGEM) coupled to a solid state CsI photo-cathode.A systematic study of the THGEM detector response as a function of its geometrical parameters and electrodes' applied voltage has been performed. Dedicated electrostatic calculations to optimize the detector design have been accomplished. Data obtained from small photon detector prototypes operating in single photon detection mode are presented and discussed. In particular the key aspect of photo-electron extraction from the photo-cathode surface is investigated via the timing spectrum response of the detector for different electric field conditions at the photo-cathode: a comparison of the measured time distributions and the simulation results is illustrated.

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Section: Photo-electron Extraction From the Csi Layermentioning

confidence: 99%

Detection of single photons with THickGEM-based counters

Alexeev

Barbosa

Birsa

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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“…These 9U VME modules are equipped with 4 slots for mezzanine cards with 32 channels each. Each TDC mezzanine card hosts 4 dead-time free chips, developed by the Faculty of Physics at the University of Freiburg [9]. The TDC performs digitization and readout asynchronously and without any dead time.…”

Section: Data Acquisition Systemmentioning

confidence: 99%

A Large-Scale FPGA-Based Trigger and Dead-Time Free DAQ System for the Kaos Spectrometer at MAMI

Achenbach

Gayoso

Bernauer

et al. 2011

IEEE Trans. Nucl. Sci.

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The KAOS spectrometer is maintained by the A1 collaboration at the Mainz Microtron MAMI with a focus on the study of ( + ) coincidence reactions. For its electron-arm two vertical planes of fiber arrays, each comprising approximately 10000 fibers, are operated close to zero degree scattering angle and in close proximity to the electron beam. A nearly dead-time free DAQ system to acquire timing and tracking information has been installed for this spectrometer arm. The signals of 144 multianode photomultipliers are collected by 96-channel front-end boards, digitized by double-threshold discriminators and the signal time is picked up by state-of-the-art F1 time-to-digital converter chips. In order to minimize background rates a sophisticated trigger logic was implemented in newly developed Vuprom modules. The trigger performs noise suppression, signal cluster finding, particle tracking and coincidence timing and can be expanded for kinematical matching ( + ) coincidences. The full system was designed to process more than 4000 read-out channels and to cope with the high electron flux in the spectrometer and the high count rate requirement of the detectors. It was successfully in-beam tested at MAMI in 2009.

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“…A typical single photoelectron spectrum obtained with this prototype detector and a gas mixture of Ar:CH 4 =50:50 is shown in figure 7: effective gains around 10 6 are recently being routinely obtained in laboratory tests. A typical time spectrum for single photon signals, obtained using the electronic chain described in [16] and, in particular, the F1 TDC [17] with 108 ps bin size, is shown in figure 8: a time resolution close to 7 ns is obtained from the fit of the main component of the time spectrum. Further studies to investigate the characteristics of the time response in different conditions are foreseen.…”

Section: Detection Of Single Photonsmentioning

confidence: 99%

Development of THGEM-based photon detectors for Cherenkov Imaging Counters

et al. 2010

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The development of a large size gaseous detector of single photons, able to stably operate at high gain and high rate, and to provide good time resolution and insensitivity to magnetic field would be beneficial to future Cherenkov Imaging Counters. The detector could be based on the use of a multilayer architecture of THGEM electron multipliers coupled to a solid state CsI photocathode. A systematic study of the response of THGEM-based counters versus the geometrical

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Implementation of the dead-time free F1 TDC in the COMPASS detector readout

Cited by 45 publications

References 2 publications

Detection of single photons with THickGEM-based counters

Detection of single photons with THickGEM-based counters

A Large-Scale FPGA-Based Trigger and Dead-Time Free DAQ System for the Kaos Spectrometer at MAMI

Development of THGEM-based photon detectors for Cherenkov Imaging Counters

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