Progress in developing hybrid RPC: GEM-like detectors with resistive electrodes

Fonte, P.; Martinengo, P.; Nappi, E.; Oliveira, Rui de; Peskov, V.

doi:10.1016/j.nima.2008.12.154

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…Recently, several groups working with such detectors fully confirmed our earlier results [12]- [14]. Unfortunately, the position resolution of RETGEM (similarly to TGEM) is limited by the hole's diameter and pitch and is about 0.7-1 mm [15], [16].…”

supporting

confidence: 64%

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First Tests of MICROMEGAS and GEM-Like Detectors Made of a Resistive Mesh

Oliveira

Peskov

Pietropaolo

et al. 2010

IEEE Trans. Nucl. Sci.

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Abstract-We describe here various detector designs: GEM-type, MICROMEGAS-type, as well as cascaded detectors made of a resistive mesh manufactured from a resistive Kapton foil, (20 m thick, surface resistivity a few M cm 2 ) by a laser drilling technique. As in any other micro-pattern detector, the maximum achievable gas gain of these detectors is restricted by the Raether limit; however, the resistive mesh makes them and the front end electronics fully spark protected. This approach may function as an alternative/or complementary component of the ongoing efforts in developing MICROMEGAS and GEMs with resistive anode readout plates and can be especially beneficial in micro-pattern detectors combined with a micro-pixel-type integrated front end electronics.

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confidence: 64%

“…Unfortunately, as noted in the introduction, the position resolution of the RETGEM is quite modest (0.7-1 mm) [15], [16] due to the large hole's diameters and pitch.…”

Section: B Csi Coated Meshesmentioning

confidence: 99%

First Tests of MICROMEGAS and GEM-Like Detectors Made of a Resistive Mesh

Oliveira

Peskov

Pietropaolo

et al. 2010

IEEE Trans. Nucl. Sci.

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“…Inside each gas chamber, an S-RETGEM was installed with a drift mesh typically placed 2 cm above it. The concept and the design of the S-RETGEM are described in several recent papers [9,10]. Recalling the main features, it is a Thick GEM [11][12][13] with double-layered micro pattern electrodes with an inner layer consisting of thin Cu strips and an outer layer comprised of a resistive grid, manufactured by screen printing technology, on top of Cu strips.…”

Section: Detectors Designmentioning

confidence: 99%

Progress in the development of a S-RETGEM-based detector for an early forest fire warning system

Charpak¹,

Benaben²,

Breuil³

et al. 2009

J. Inst.

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In this paper we present a prototype of a Strip Resistive Thick GEM (S-RETGEM) photosensitive gaseous detector filled with Ne and ethylferrocene (EF) vapours at a total pressure of 1 atm for an early forest fire detection system. Tests show that it is one hundred times more sensitive than the best commercial ultraviolet (UV) flame detectors; and therefore, it is able to reliably detect a flame of ~1.5x1.5x1.5 m 3 at a distance of about ~1km. An additional and unique feature of this detector is its imaging capability, which in combination with other techniques, may significantly reduce false fire alarms when operating in an automatic mode.Preliminary results conducted with air-filled photosensitive gaseous detectors are also presented. The approach's main advantages include both the simplicity of manufacturing and affordability of construction materials such as plastics and glues specifically reducing detector production cost. The sensitivity of these air-filled detectors at certain conditions may be as high as those filled with Ne and EF. Long-term test results of such sealed detectors indicate a significant progress in this direction.We believe that our detectors utilized in addition to other flame and smoke sensors will exceptionally increase the sensitivity of forest fire detection systems. Our future efforts will be focused on attempts to commercialize such detectors utilizing our aforementioned findings. * The sensitivity of the class -1 UV detectors is comparable to the sensitivity of the best commercial IR detectors [7].

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“…At higher gains 55 Fe was used and the gain values were estimated from the measured avalanche charge and the known sensitivity of the amplifier. As it can be seen, at room temperature, the maximum achievable gain was ~3x10 4 which is 3-10 times higher than that achieved with other micropattern gaseous detectors operated in Ar. No feedback pulses originating from the CsI photocathode were observed (they should have a delay of a few μs) even at the maximum achievable gains, proving that in RMMDs the avalanche region is geometrically well shielded with respect to the photocathode.…”

Section: Resultsmentioning

confidence: 71%

“…Usually surface streamers appear if the field lines are parallel to the dielectric surface (along all the surfaces) between the anode and the cathode electrodes. At the last three RPC conferences [3][4][5], we reported that the resistive electrode approach, used in RPCs, can be successfully applied to micropattern gaseous detectors making them sparkprotected. Our first spark-protected detectors -GEM and MICROMEGAS -had unsegmented resistive electrodes [3,5].…”

Section: Introductionmentioning

confidence: 99%

Development and preliminary tests of resistive microdot and microstrip detectors

et al. 2012

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In the last few years our group have focused on developing various designs of spark-protected micropattern gaseous detectors featuring resistive electrodes instead of the traditional metallic ones: resistive microstrip counters, resistive GEM, resistive MICROMEGAS. These detectors combine in one design the best features of RPCs (sparkprotection) and micropattern detectors (a high position resolution). In this paper we report the progress so far made in developing other types of resistive micropattern detectors: a microdot-microhole detector and a microgap-microstrip detector. The former detector is an optimal electron amplifier for some special designs of dual phase noble liquid TPCs, for example with a CsI photocathode immersed inside the noble liquid. Preliminary tests of such a detector, for the first time built and investigated, are reported in this paper. The latter detector is mainly orientated towards medical imaging applications such as Xray scanners. However, we believe that after a proper gas optimization, these detectors could also achieve a high time resolution and could thus be used in applications as TOF-PET, detection of charged particles with simultaneous high time and position resolution etc.

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Progress in developing hybrid RPC: GEM-like detectors with resistive electrodes

Cited by 9 publications

References 9 publications

First Tests of MICROMEGAS and GEM-Like Detectors Made of a Resistive Mesh

First Tests of MICROMEGAS and GEM-Like Detectors Made of a Resistive Mesh

Progress in the development of a S-RETGEM-based detector for an early forest fire warning system

Development and preliminary tests of resistive microdot and microstrip detectors

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