Readout electronics for the central drift chamber of the Belle II detector

Uchida,; Ikeno,; Iwasaki, Kei; Saito,; Shimazaki,; Tanaka, M.; Taniguchi,; Uno,

doi:10.1109/nssmic.2011.6154084

Cited by 16 publications

(8 citation statements)

References 6 publications

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“…The front-end readout electronics were fabricated based on the Readout Electronics for the Central Drift Chamber of Belle-II Experiment (RECBE) [8,9] with some modifications. There are two outputs from the frontend amplifiershaper-discriminator ASIC of RECBE [10]; one is discriminated inside the ASIC and converted to timing information with 960-MHz TDC in an FPGA; the other is used to measure the charge with 10-bit, 30-MHz sampling rate ADC.…”

Section: A Prototype Chambermentioning

confidence: 99%

Test of a small prototype of the COMET cylindrical drift chamber

Wu,

Wong,

Kuno

et al. 2021

Preprint

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The performance of a small prototype of a cylindrical drift chamber (CDC) used in the COMET Phase-I experiment was studied by using an electron beam.The prototype chamber was constructed with alternating all-stereo wire configuration and operated with the He−iC 4 H 10 (90/10) gas mixture without a magnetic field. The drift space-time relation, drift velocity, dE/dx resolution, hit efficiency, and spatial resolution as a function of distance from the wire were investigated. The average spatial resolution of 150 µm with the hit efficiency of 99 % was obtained at applied voltages higher than 1800 V. We have demonstrated that the design and gas mixture of the prototype match the operation of the COMET CDC.

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Section: A Prototype Chambermentioning

confidence: 99%

Test of a small prototype of the COMET cylindrical drift chamber

Wu,

Wong,

Kuno

et al. 2021

Preprint

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“…One of the major components for the Phase-I trigger system is the COTTRI system which will take event data produced by the CDC and CTH detectors in order to make trigger decisions. The CDC detector output will be connected to readout electronics boards (RECBE) (originally designed and developed for and by the Belle II experiment [3]) which will feed into 10 COTTRI Front-End (FE) boards located behind the RECBE boards inside the detector solenoid. The trigger information from the 10 FE boards will then be fed into the COTTRI Merger-Board (MB) with all final trigger decisions being processed by a central FC7 based processor [4].…”

Section: A Comet and The Cottri Systemmentioning

confidence: 99%

Radiation Tolerance of Online Trigger System for COMET Phase-I

Dekkers

Nakazawa²,

Fujii³

et al. 2021

IEEE Trans. Nucl. Sci.

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The COMET experiment aims to search for the neutrinoless muon to electron transition process with new sensitivity levels. The online trigger system is an integral part of achieving the sensitivity levels required and will be subject to an expected neutron fluence of up to 10 12 neq • cm −2 within regions inside the detector solenoid. Consequently a significant number of soft errors in the logic of the on board field programmable gate arrays (FPGA) can occur, requiring error correction for single event upsets and firmware reprogramming schemes for unrecoverable soft errors. We studied the radiation tolerance of the COMET Phase-I front-end trigger system, called COTTRI, subject to neutron fluence on order 10 12 neq •cm −2 with multiple error correcting codes and automatic firmware reconfiguration. The regions measured were the configuration RAM, block RAM and also in a multi-gigabit transfer link using copper cables that will be used for communication between different trigger boards during Phase-I. The resulting error rates suggest the most significant impact to the experiment will come from unrecoverable soft errors in configuration RAM, with dead time expected to be (3.7 ± 1.2) %. The effect of multi-bit errors in block RAM was found to be almost negligible in COMET Phase-I. In addition, multiple solutions have already been proposed in order to suppress these errors further. Error rates observed in the multi-gigabit transfer links were measured to be of two orders of magnitude less impact compared to the unrecoverable errors in configuration RAM. We concluded that the COTTRI system meets the trigger requirement in COMET Phase-I.

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“…The Belle-II CDC readout electronics board (RECBE) [60] is used for the front-end readout of the CDC with appropriate modifications. Each board has 48 input channels, 6 ASD (Amplifier Shaper Discriminator) ASIC chips [61], 6 ADCs and an FPGA.…”

Section: Electronicsmentioning

confidence: 99%

COMET Phase-I Technical Design Report

Abramishvili,

Adamov,

Akhmetshin

et al. 2018

Preprint

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The Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of an aluminium nucleus (µ−e conversion, µ − N → e − N); a lepton flavor violating process. The experimental sensitivity goal for this process in the Phase-I experiment is 3.1 × 10 −15 , or 90 % upper limit of branching ratio of 7 × 10 −15 , which is a factor of 100 improvement over the existing limit. The expected number of background events is 0.032. To achieve the target sensitivity and background level, the 3.2 kW 8 GeV proton beam from J-PARC will be used. Two types of detectors, CyDet and StrECAL, will be used for detecting the µ−e conversion events, and for measuring the beam-related background events in view of the Phase-II experiment, respectively. Results from simulation on signal and background estimations are also described.

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Readout electronics for the central drift chamber of the Belle II detector

Cited by 16 publications

References 6 publications

Test of a small prototype of the COMET cylindrical drift chamber

Test of a small prototype of the COMET cylindrical drift chamber

Radiation Tolerance of Online Trigger System for COMET Phase-I

COMET Phase-I Technical Design Report

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