Performance of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="mml15" display="inline" overflow="scroll" altimg="si1.gif"><mml:mi mathvariant="normal">μ</mml:mi></mml:math>-RWELL detector vs resistivity of the resistive stage

Bencivenni, G.; Tskhadadze, E.; Lener, M. Poli; Morello, G.; Oliveira, Rui de; Ochi, A.; Felici, G.; Gatta, M.

doi:10.1016/j.nima.2017.12.037

Cited by 21 publications

(7 citation statements)

References 8 publications

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“…Differently from the classical gas counters, where the distances between anodic and cathodic electrodes are of the order of several mm, in MPGDs, the ionisation charge produced by the charged particle in the gas is multiplied by microstructures with distances between electrodes of the order 10-100 µm, resulting in a much faster time response. These architectures are implemented for example by micro-holes in GEM [18] and μRWELL [19][20][21] and by micro-mesh in MicroMegas [22]. The last generation of MPGDs exploits modern photolithography technology on flexible and rigid supports.…”

Section: Detector Technology Optionsmentioning

confidence: 99%

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Muon detection at FCC-ee

Braibant

Giacomelli

2021

Eur. Phys. J. Plus

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Muons provide a clean experimental signature, typically traversing the whole experimental apparatus without decaying. Muon detection systems are therefore usually located at a rather large distance from the primary interaction vertex after all other sub-detectors. As such, experimental apparatuses at FCC-ee will certainly employ very large muon systems, covering areas of a few thousand square meters. For obvious reasons of cost, the most suitable detectors to realise these large muon systems are gas detectors. In particular, in recent years, micro-pattern gas detectors (MPGDs) have undergone very interesting developments, providing several new types of detectors with very good spatial and time resolution, high efficiency, high rate capability and high radiation tolerance. The good position and time resolution makes a MPGD an excellent particle tracker, reconstructing tracks at 4–5 m from the primary interaction vertex with sub-mm precision. Therefore MPGDs, apart from efficiently detecting muons, can precisely track and help identifying also hypothesized long lived particles (LLP) that would decay outside of the central trackers. MPGDs have the distinct advantage of being, at least for some detectors and some parts of them, mass-producible by industry, since they employ materials and manufacturing procedures that are used extensively for printed circuit boards (PCB) production. A particularly innovative MPGD, the $$\mu $$ μ RWELL, is considered as a possible candidate to build the large muon system of the IDEA detector concept for FCC-ee and is described in some more detail. Other technologies that could be considered for the realisation of muon detection systems are also briefly discussed.

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Section: Detector Technology Optionsmentioning

confidence: 99%

“…The signal is capacitively collected at the strips/pads on the readout boards. In recent years many μRWELL detector prototypes have been built and operated in test beams [20,21]. Typically a μRWELL detector is operated at a high voltage providing a gas gain of a few thousand.…”

Section: Detector Technology Optionsmentioning

confidence: 99%

Muon detection at FCC-ee

Braibant

Giacomelli

2021

Eur. Phys. J. Plus

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“…Development and Test of a Micro-Pattern Resistive Plate Detector Paolo Iengo carbon [7], (obtained with vacuum deposition of carbon) resistive layer instead of screen-printed strips, which is known to offer a smoother and more uniform surface.…”

Section: Pos(ichep2020)850mentioning

confidence: 99%

Development and Test of a Micro-Pattern Resistive Plate Detector.

Iengo¹

2021

Proceedings of 40th International Conference on High Energy Physics — PoS(ICHEP2020)

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We present the design and preliminary tests of a resistive strip device built with techniques developed for micro-pattern gaseous detectors. It consists of two equal electrode plates made of FR4 substrate with 250 Cu readout strips. A 50 µm insulating foil, carrying resistive lines, is glued on top of the substrate. Both the Cu and the resistive strips have a pitch of 400 µm and width of 300 µm. The plates are spaced by a 2 mm gap and rotated by 90 • providing 2D tracking capability. With such a device the surface resistivity can be tuned to values below the ones of existing RPC (either glass or phenolic-melamine). The thin separation layer between the electrodes and the readout strips provides a better capacitive coupling of the signal, allowing to operate the detector at lower gain. Moreover, the strip-shaped resistive pattern reduces the induced charge size in the direction perpendicular to the strips. All these features go in the direction of improving the rate capability. The basic concept of this new device will be presented together with results of preliminary tests ongoing at CERN.

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“…The µ-RWELL detectors were tested extensively during the last years [5,6] always operating with Ar/CO 2 /CF 4 (45/15/40) gas mixture. The relevant physical quantities are reported in this paper as a function of the detector gas gain to take into account small manufacturing differences in the amplification stage of the µ-RWELL prototypes (i.e.…”

Section: Overall Performance Of the Detectorsmentioning

confidence: 99%

The μ-RWELL for high rate application

et al. 2020

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The micro-Resistive WELL (µ-RWELL) is a compact, simple and robust Micro-Pattern Gaseous Detector (MPGD) developed for large area HEP applications requiring the operation in harsh environment. The detector amplification stage, similar to a GEM foil, is realized with a polyimide structure micro-patterned with a blind-hole matrix, embedded through a thin Diamond-Like-Carbon (DLC) resistive layer with the readout PCB. The introduction of a resistive layer (ρ = 50 ÷ 200 MΩ/ ) mitigating the transition from streamer to spark gives the possibility to achieve large gains (> 10 4 ), while affecting the detector performance in terms of rate capability. Different detector layouts have been studied: the most simple one based on a single-resistive layer, with edge grounding has been designed for low-rate applications (few tens of kHz/cm 2 ); more sophisticated schemes have been studied for high-rate purposes (≥ 10 MHz/cm 2 ). An overview of the different architectures studied for the high-rate version of the detector, together with their performance will be presented. The presence of the resistive layer also affects the charge spread on the strips and consequently the spatial resolution of the detector: a systematic study of the spatial resolution obtained with the charge centroid (CC) method as a function of the impinging angle was made. For non-orthogonal tracks the spatial resolution with CC method is compared with the performance obtained with the micro-TPC mode (µTPC): a readout approach that exploits the combined measurement of the ionization clusters time of arrival and the amplitude of the signals on the strips. Implementing the µTPC allows reaching an almost flat space resolution < 100 µm for a wide angular range. Finally the results of the detector aging campaign is presented, with detectors integrating up to 175 mC/cm 2 and bare DLC foils integrating a charge up to 800 mC/cm 2 .

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Performance of μ-RWELL detector vs resistivity of the resistive stage

Cited by 21 publications

References 8 publications

Muon detection at FCC-ee

Muon detection at FCC-ee

Development and Test of a Micro-Pattern Resistive Plate Detector.

The μ-RWELL for high rate application

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