New Developments in Micromegas Microbulk Detectors

Iguaz, F.J.; Andriamonje, S.; Belloni, F.; Berthoumieux, E.; Calviani, M.; Dafní, T.; Oliveira, D.; Ferrer‐Ribas, E.; Galáan, J.; Garcáıa, J.A.; Giomataris, I.; Guerrero, C.; Gunsing,; Herrera, D.C.; Irastorza, I.G.; Papaevangelou, T.; Rodráıguez, A.; Tomáas, A.

doi:10.1016/j.phpro.2012.02.392

Cited by 6 publications

(10 citation statements)

References 22 publications

(21 reference statements)

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“…High detection efficiency (∼100%) and good vertex resolution allows for the measurement of fusion cross-sections well below the Coulomb barrier. In previous studies, THGEMs operation in Ne+CH 4 [13] and Ne+iC 4 H 10 [14] gas mixtures at atmospheric pressures have resulted in high gains (≈10 5 ). However, these mixtures are not well suited for Ne fusion reactions in TPCs as the carbon in CH 4 and iC 4 H 10 leads to background fusion reactions.…”

Section: Introductionmentioning

confidence: 92%

Low-pressure THGEM-based operation with Ne+H2 Penning mixtures

Randhawa,

Ahn,

Kolata

et al. 2022

Preprint

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Operation of Thick Gas Electron Multipliers (THGEMs) in Time Projection Chambers (TPCs) using various gas mixtures find applications in various nuclear physics and particle detection experiments. Of particular interest are use of neon-based gas mixtures at low pressures in TPCs as active targets for radioactive beams. Here, we report on the low pressure operation of THGEMs in Ne+H 2 based gas mixtures, where neon in this mixture is an important target for fusion studies with TPCs. We show that, since the Ne+H 2 forms a Penning pair, higher gains are achievable compared to pure neon gas. Moreover, H 2 as a quench-gas produces minimal background in fusion reactions compared to carbon-based neon gas mixtures. Detailed electron transport and amplification simulations have been performed and they qualitatively agree with the increased gain H 2 provides in the Ne:H 2 mixture. This allows for sufficiently high gains for the use of Ne gas with THGEMs that will enable the measurement of heavy-ion tracks for nuclear physics experiments at modest gas pressures.

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Section: Introductionmentioning

confidence: 92%

Low-pressure THGEM-based operation with Ne+H2 Penning mixtures

Randhawa,

Ahn,

Kolata

et al. 2022

Preprint

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“…The second detector used is based on the Microbulk technology [6]. Four sectorial detectors (with the shape of a quarter of a circle) were installed due to the current manufacturing limitation to a maximum wafer size of ∼25×25 cm 2 (Figure 4-right).…”

Section: Readout Plane: Micromegas Detectorsmentioning

confidence: 99%

Description and commissioning of NEXT-MM prototype: first results from operation in a Xenon-Trimethylamine gas mixture

et al. 2014

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A technical description of NEXT-MM and its commissioning and first performance is reported. Having an active volume of ∼35 cm drift × 28 cm diameter, it constitutes the largest Micromegas-read TPC operated in Xenon ever constructed, made by a sectorial arrangement of the 4 largest single wafers manufactured with the Microbulk technique to date. It is equipped with a suitably pixelized readout and with a sufficiently large sensitive volume (∼23 l) so as to contain long (∼20 cm) electron tracks. First results obtained at 1 bar for Xenon and Trymethylamine (Xe-(2%)TMA) mixture are presented. The TPC can accurately reconstruct extended background tracks. An encouraging full-width half-maximum of 11.6 % was obtained for ∼ 29 keV gammas without resorting to any data post-processing.

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“…Smaller gaps have been tested as well but appeared to produce less efficient avalanches at atmospheric pressure. Microbulk detectors show a very stable gain and excellent energy resolution [14]. The gas is continuously renewed in order to keep a constant ionizability.…”

Section: Introductionmentioning

confidence: 99%

MicroMegas-based detectors for time-of-flight measurements of neutron-induced reactions

et al. 2020

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MicroMegas detectors are versatile gaseous detectors which are used for ionizing particle detection. A MicroMegas detector consists of two adjacent gas-filled volumes. One volume acts as a drift region with an electric field operating in the ionization chamber regime, the second volume is the amplification region acting as a parallel-plate avalanche counter. The use of the microbulk technique allows the production of thin, radiation resistant, and low-mass detector with a highly variable gain. Such MicroMegas detectors have been developed and used in combination with neutron time-of-flight measurements for in-beam neutron-flux monitoring, fission and light-charged particle reaction cross section measurements, and for neutron-beam imaging. An overview of MicroMegas detectors for neutron detection and neutron reaction cross section measurements and related results and developments will be presented.

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New Developments in Micromegas Microbulk Detectors

Cited by 6 publications

References 22 publications

Low-pressure THGEM-based operation with Ne+H2 Penning mixtures

Low-pressure THGEM-based operation with Ne+H2 Penning mixtures

Description and commissioning of NEXT-MM prototype: first results from operation in a Xenon-Trimethylamine gas mixture

MicroMegas-based detectors for time-of-flight measurements of neutron-induced reactions

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