Radiation hard ceramic RPC development

The results of an experimental feasibility study of a position sensitive thermal neutron detector based on a resistive plate chamber (RPC) are presented. The detector prototype features a thin-gap (0.35 mm) hybrid RPC with an aluminium cathode lined with a 2 µm thick 10 B 4 C neutron converter layer enriched in 10 B and a float glass anode. A detection efficiency of ≈ 6.2% was measured for the neutron beam (λ = 2.5 Å) at normal incidence. A spatial resolution better than 0.5 mm FWHM was demonstrated.

Section: Discussionmentioning

confidence: 99%

“…The anode material of the prototype tested in this study was common float glass with high resistivity (∼ 10 12 Ω • cm), which limits the maximum counting rate of the detector (≤ 1 kHz/cm 2 ). It should be possible to improve this value using lower resistivity anode materials and lower polarization voltages [29][30][31].…”

Section: Discussionmentioning

confidence: 99%

Boron-10 lined RPCs for sub-millimeter resolution thermal neutron detectors: Feasibility study in a thermal neutron beam

Margato¹,

Morozov²,

Blanco³

et al. 2019

“…In order to preserve the spark protection mechanism [28], at least one of the RPC plates have to be made of a material with high volume resistivity (10 8 -10 13 Ω•cm). Typically, glass, phenolic laminates or ceramics are used for this purpose (see [27,29,30] and the references therein).…”

Section: Basic Conceptmentioning

confidence: 99%

Boron-10 lined RPCs for sub-millimeter resolution thermal neutron detectors: conceptual design and performance considerations

Margato¹,

Morozov²

2018

A novel concept for position-sensitive thermal neutron detectors based on thingap Resistive Plate Chambers (RPC) lined with a neutron converter layer is presented and its feasibility is discussed. Several detector architectures implementing a stack of RPCs in multilayer and inclined geometries are introduced. The results of a Monte Carlo simulation study are presented demonstrating the effect of the main detector design parameters on the expected detection efficiency and spatial resolution.

“…To omit geometrically acceptance losses, the RPCs are sorted meandering. Each quadratic RPC with 6 gas gaps of 250 µm consists of a stack of three separate counter cells [3,5]. The counter gas mixture consists of two components, R134a (90 %) and SF 6 (10 %) where the detector volume has been exchanged twice per hour.…”

Section: Instrumentationmentioning

confidence: 99%

“…Also the crosstalk between adjacent detector cells should not exceed 2 %. Tests with the BFTC-minimodule of 8 RPC cells have been performed [3,5] with high fluxes of electrons at the ELBE accelerator during two beam-times in 2017 in order to adopt the BFTC-prototype construction and signal readout scheme for operation with the PADI ASIC [6]. RPCs with electrode areas from 20×20 mm 2 up to 200×200 mm 2 have been assembled and tested with electrons and protons under high irradiation conditions [7,8].…”

Section: Introductionmentioning

confidence: 99%

A timing RPC with low resistive ceramic electrodes

Sultanov¹,

Akindinov²,

Beyer³

et al. 2019

A : For precise start time determination a Beam Fragmentation T 0 Counter (BFTC) is under development for the Time-of-Flight Wall of the Compressed Baryonic Matter Spectrometer (CBM) at the Facility for Antiproton and Ion Research (FAIR) at Darmstadt/Germany. This detector will be located around the beam pipe, covering the front area of the Projectile Spectator Detector. The fluxes at this region are expected to exceed 10 5 cm −2 s −1 . Resistive plate chambers (RPC) with ceramic composite electrodes could be use because of their high rate capabilities and radiation hardness of material. Efficiency ≥ 97 %, time resolution ≤ 90 ps and rate capability ≥ 10 5 cm −2 s −1 were confirmed during many tests with high beam fluxes of relativistic electrons. We confirm the stability of these characteristics with low resistive Si 3 N 4 /SiC floating electrodes for a prototype of eight small RPCs, where each of them contains six gas gaps. The active RPC size amounts 20×20 mm 2 produced on basis of Al 3 O 2 and Si 3 N 4 /SiC ceramics. Recent test results obtained with relativistic electrons at the linear accelerator ELBE of the Helmholtz-Zentrum Dresden-Rossendorf with new PADI-10 Front-end electronic will be presented.