Design and performance evaluation of front-end electronics for COMET straw tracker

Ueno, Katsunori; Hamada, Eitaro; Hashimoto, Shotaro; Ikeno, M.; Mihara, S.; Nishiguchi, H.; Uchida, Tomohisa; Yamaguchi, H.

doi:10.1016/j.nima.2018.08.027

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…speed and high accuracy. We evaluated the performance of this prototype and confirmed that it satisfies all the requirements described above [3]. Fig.…”

Section: Roestisupporting

confidence: 65%

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Gigabit Ethernet Daisy-Chain on FPGA for COMET Read-out Electronics

Hamada,

Fujii,

Igarashi

et al. 2020

Preprint

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The COMET experiment at J-PARC aims to search for the neutrinoless transition of a muon to an electron. We have developed the readout electronics board called ROESTI for the COMET straw tube tracker. We plan to install the ROESTI in the gas manifold of the detector. The number of vacuum feedthroughs needs to be reduced due to space constraints and cost limitations. In order to decrease the number of vacuum feedthroughs drastically, we developed a network processor with a daisy-chain function of Gigabit Ethernet for the FPGA on the ROESTI. We implemented two SiTCPs, which are hardwarebased TCP processors for Gigabit Ethernet, in the network processor. We also added the data path controllers which handle the Ethernet frames and the event data. The network processor enables ROESTI to process the slow control over UDP/IP and to transfer event data over TCP/IP. By using the network processor, we measured the throughput, the stability, and the data loss rate for two to six ROESTIs. In any number of boards, the throughput of the event data transfer achieved the theoretical limit of TCP over the Gigabit Ethernet stably and ROESTI stably sent 100% of the data.

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“…speed and high accuracy. We evaluated the performance of this prototype and confirmed that it satisfies all the requirements described above [3]. Fig.…”

Section: Roestisupporting

confidence: 65%

“…(Read-Out Electronics for Straw Tube Instrument) which reads out the signal from the detector precisely [3]. In order to prevent the degradation of the detector signal, the ROESTI needs to be located near the detector.…”

Section: Introductionmentioning

confidence: 99%

Gigabit Ethernet Daisy-Chain on FPGA for COMET Read-out Electronics

Hamada,

Fujii,

Igarashi

et al. 2020

Preprint

Self Cite

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“…Signals from both the straw tracker and the ECAL are processed with front-end readout electronics, which contains preamplification, pulse shaping, discrimination, and digitization [37]. All the functionalities are controlled by FPGAs.…”

Section: Experimental Apparatus 231 Straw-tube Tracker and Electron C...mentioning

confidence: 99%

Search for Muon-to-Electron Conversion with the COMET Experiment

Moritsu¹

2022

Universe

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Charged Lepton Flavor Violation is expected to be one of the most powerful tools to reveal physics beyond the Standard Model. The COMET experiment aims to search for the neutrinoless coherent transition of a muon into an electron in the field of a nucleus. Muon-to-electron conversion has never been observed, and can be, and would be, clear evidence of new physics if discovered. The experimental sensitivity of this process, defined as the ratio of the muon-to-electron conversion rate to the total muon capture rate, is expected to be significantly improved by a factor of 100 to 10,000 in the coming decade. The COMET experiment will take place at J-PARC with single event sensitivities of the orders of 10−15 and 10−17 in Phase-I and Phase-II, respectively. The ambitious goal of the COMET experiment is achieved by realizing a high-quality pulsed beam and an unprecedentedly powerful muon source together with an excellent detector apparatus that can tolerate a severe radiation environment. The construction of a new beam line, superconducting magnets, detectors and electronics is in progress towards the forthcoming Phase-I experiment. We present the experimental methods, sensitivity and backgrounds along with recent status and prospects.

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“…Performance evaluation of the semi-final version of the ROESTI was done. Almost all the performance satisfy requirements and the detail is described in [12,13]. On the basis of the results, we are developing the final version of the ROESTI.…”

Section: Straw Tube Trackermentioning

confidence: 99%

Status on the StrECal System for COMET Phase-I

Ueno

2021

Proceedings of the 3rd J-Parc Symposium (J-Parc2019)

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The COMET experiment at J-PARC aims to search for the charged lepton flavor violating process of neutrinoless µ-e conversion, which indicates the new physics beyond the standard model. The goal sensitivities of its Phase-I and Phase-II are respectively to be improved by a factor of 100 and 10000 to the current limit given by SINDRUM-II at PSI. When the µ-e conversion occurs, almost all the energy of the muon mass is carried out by the electron which has the monochromatic energy of about 105 MeV. The experiment requires to detect such electron with an excellent momentum resolution, better than 200 keV/c, in order to achieve the goal sensitivity. High rate capability is also necessary for accumulation of enough statistics with high power proton driver at J-PARC. In addition, the detector system needs the ability of particle identification (PID) with those conditions. Based on these requirements, we plan to construct a StrECal system which consists of a straw tube tracker and an electron calorimeter (ECal). The system is put in the detector solenoid with a B-field of 1 T. The straw tube tracker detects the particle momentum with the operation in the vacuum. The tracker is constructed by the extremely light material, which can achieve the high momentum resolution. The ECal consists of segmented scintillating crystals, which is placed downstream of the straw tube tracker. The ECal measures the energy of electron with good resolution to add redundancy to the momentum measurement, which can provide the ratio E/p for PID combining the measured momentum in the straw tracker. The ECal also provides the trigger signals, carrying the timing with respect to which the events are referenced. Development of the StrECal system is now ongoing and its construction has begun. In this paper, we report the status on the StrECal system including its readout electronics and the trigger system. The prospect of final detector system is also described.

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Design and performance evaluation of front-end electronics for COMET straw tracker

Cited by 4 publications

References 8 publications

Gigabit Ethernet Daisy-Chain on FPGA for COMET Read-out Electronics

Gigabit Ethernet Daisy-Chain on FPGA for COMET Read-out Electronics

Search for Muon-to-Electron Conversion with the COMET Experiment

Status on the StrECal System for COMET Phase-I

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