Signal shape and charge sharing between electrodes of GEM in dimethyl ether

Takeuchi, Yoko; Tamagawa, Toru; Asami, Fumi; Yoshikawa, A.; Iwahashi, T.; Konami, Saori; Iwakiri, W.

doi:10.1088/1748-0221/7/03/c03042

Cited by 6 publications

(6 citation statements)

References 9 publications

(11 reference statements)

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“…Finally in an electrolyte solution consisting of a specific electron donor or acceptor participates in a redox reaction at the solid-liquid interface [99,100]. The charge is utilized to generate an electrical signal between the working electrode and the counter electrode [101,102] (iv). The electrochemical workstation will then record the electrical output.…”

Section: Fundamental Principles Of Electronic Transfermentioning

confidence: 99%

Recent advances on portable photoelectrochemical biosensors for diagnostics

Wu,

Tang

2023

Electroanalysis

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Efficient and accurate diagnostic methods are important for human health monitoring and prevention of major diseases, so the establishment of efficient and convenient testing methods for clinical diagnosis is urgent. Photoelectrochemical (PEC) biosensors have attracted much attention because of their high sensitivity, low detection background, and especially the advantages of combining photoexcitation and electrochemical detection. With the rapid development of integrated circuit technology many wireless transmissions of highly aggregated portable micro devices are manufactured, its small size, easy to carry, and the ability to visualize the results of the test is shown to be the potential for the application of such devices. This review aims to cover recent advances in PEC biosensing within the field of portable detection, including the principles of PEC biosensors, common photovoltaic materials, and scalable fabrication techniques for portable PEC biosensing. Future prospects in the field are also discussed.

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Section: Fundamental Principles Of Electronic Transfermentioning

confidence: 99%

Recent advances on portable photoelectrochemical biosensors for diagnostics

Wu,

Tang

2023

Electroanalysis

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“…The important feature of GEM detectors is that in properly chosen operating conditions, the charge delivered to the readout pads is proportional to the energy of the ionizing particle. The shape of the current pulse may be different [5,6] depending on the gas used in the detector and on the operating conditions. The current pulses from each readout pad are received by the shaping charge amplifier with introduced low cut frequency, which forms the voltage pulses of standard shape.…”

Section: Gem Detectorsmentioning

confidence: 99%

FPGA and Embedded Systems Based Fast Data Acquisition and Processing for GEM Detectors

et al. 2018

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Gas electron multiplier (GEM) detectors (Sauli in Nucl Instrum Methods Phys Res A 805:2-24, 2016. https://doi.org/10. 1016/j.nima.2015.07.060 (special issue in memory of Glenn F. Knoll); Buzulutskov in Instrum Exp Tech 50(3):287-310, 2007. https://doi.org/10.1134/S0020441207030013) are widely used for detection of ionizing radiation. When used in the proportional mode, they provide information about time, location, and energy of a detected particle (Chernyshova et al. in Fusion Eng Design, 2017. https://doi.org/10.1016/j.fusengdes.2017.03.107; Altunbas et al. in Nucl Instrum Methods Phys Res A 490(1-2):177-203, 2002. https://doi.org/10.1016/S0168-9002(02)00910-5. http://linkinghub.elsevier.com/retrieve/ pii/S0168900202009105). Modern technologies allow full utilization of detector properties, by acquiring the waveform of output current pulses and processing them using sophisticated digital signal processing (DSP) algorithms. The current pulses must be digitized at high speed (up to 125 MHz) with high resolution (up to 12-bits). Due to the high volume of the produced data, it is necessary to provide the high-performance data acquisition system (DAQ) to transmit the data to processing units. Efficient processing of the GEM data requires distributed parallel processing system to perform multiple tasks (Czarski et al. in Rev Sci Instrum 87(11), 11E336, 2016. https://doi.org/10.1063/1.4961559): (1) Filter out the background and transmit only hit related data. (2) Extract the parameters of a hit, describing the time and charge (related to energy). (3) Estimate the hit position by combining information from multiple anode pads. (4) In case of 2D GEM detectors, correlate pulses received from X and Y pads (pixels) or W, U and V pads (pixels). (5) Separate the hits overlapping in space or in time (if possible) to support detector operation at higher rates. The above functionalities may be achieved in different hardware architectures. The typical hardware platforms include FPGA chips, standard or embedded computer systems with different computation accelerators (Wojenski et al. in J Instrum 11(11):C11035, 2016. http://stacks. iop.org/1748-0221/11/i=11/a=C11035; Nowak et al. in J Phys Conf Ser 513(5):052-024, 2014. https://doi.org/10.1088/ 1742-6596/513/5/052024. http://stacks.iop.org/1742-6596/513/i=5/a=052024?key=crossref.c5912cfa72c30b309821e14c43 84948f. The paper shows possible solutions with their feasibility for particular applications.

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“…Note, however, that the number of candidates scales multiplicatively with the number of 1D hits from each axis. To combat this, most GEM systems (including the OLYMPUS detectors) are designed to share the charge signal as equally as possible between the dimensions of the readout so that the magnitude of the 1D hits can be compared so as to indicate better which pairs of of 1D hits go together to properly form a 2D hit [185,186].…”

Section: Gem Detectorsmentioning

confidence: 99%

A precision measurement of the e+p/e-p elastic scattering cross section ratio at the OLYMPUS experiment

Henderson¹

2017

Preprint

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Measurements of the ratio of the proton elastic form factors (µ p G E /G M ) using Rosenbluth separation and those using polarization-based techniques show a strong discrepancy, which has persisted both in modern experimental results and in re-analyses of previous data. The most widely accepted hypothesis to explain this discrepancy is the treatment of the contributions from hard two-photon exchange (TPE) to elastic electron-proton scattering in the radiative corrections applied to the Rosenbluth separation measurements. Calculations of the hard TPE contribution are highly model dependent, but the effect may be measured experimentally with a precise determination of the ratio of the positron-proton and electron-proton elastic scattering cross sections.The OLYMPUS experiment collected approximately 4 fb −1 of e + p and e − p scattering data at the DORIS storage ring at DESY in 2012, with the goal of measuring the elastic σ e + p /σ e − p ratio over the kinematic range (0.4 ≤ ≤ 0.9), (0.6 ≤ Q 2 ≤ 2.2) GeV 2 /c 2 at a fixed lepton beam energy of 2.01 GeV. The detector for the OLYMPUS experiment consisted of refurbished elements of the Bates Large Acceptance Spectrometer Toroid (BLAST) surrounding an internal gaseous hydrogen target, with the addition of multiple systems for the monitoring of the luminosity collected by the experiment. A detailed simulation of the experiment was developed to account for both radiative corrections and various systematic effects.This work presents preliminary results from the OLYMPUS data, demonstrating that the elastic σ e + p /σ e − p ratio rises to several percent at ≈ 0.4 and indicating a significant contribution from TPE to e ± p scattering. Additionally, the value of σ e + p /σ e − p has been measured to unprecedented precision at = 0.98, which provides a valuable normalization point for other experimental data.

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Signal shape and charge sharing between electrodes of GEM in dimethyl ether

Cited by 6 publications

References 9 publications

Recent advances on portable photoelectrochemical biosensors for diagnostics

Recent advances on portable photoelectrochemical biosensors for diagnostics

FPGA and Embedded Systems Based Fast Data Acquisition and Processing for GEM Detectors

A precision measurement of the e+p/e-p elastic scattering cross section ratio at the OLYMPUS experiment

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