On the deterministic and stochastic solutions of Space Charge models and their impact on high resolution timing

Mangiarotti, A.; Bueno, Carmen C.; Fonte, P.; Gobbi, A.; González-Díaz, D.; Lopes, L.

doi:10.1016/j.nuclphysbps.2006.07.024

Cited by 12 publications

(22 citation statements)

References 15 publications

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“…-for fixed irradiation and geometry the growth of the induced charge with the applied voltage deviates from the exponential behaviour (25) and becomes almost linear;…”

Section: Space-charge Effectmentioning

confidence: 92%

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Review of Simulation and Modeling

Fonte¹

2012

Proceedings of XI Workshop on Resistive Plate Chambers and Related Detectors — PoS(RPC2012)

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In spite of their apparent simplicity, RPCs feature a range of physical situations somewhat more complex than those found in most other gaseous detectors. These include the interplay between materials with different electrical characteristics, space-charge dominated avalanches evolving in very high electric fields and the propagation of fast signals on heterogeneous multiconductor transmission lines. In this article the state-of-the-art of the modelling of many of these aspects is reviewed and some aspects still requiring further work highlighted.

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“…-for fixed irradiation and geometry the growth of the induced charge with the applied voltage deviates from the exponential behaviour (25) and becomes almost linear;…”

Section: Space-charge Effectmentioning

confidence: 92%

“…This self-control of the avalanche charge via the space-charge effect is a fundamental feature of the avalanche-mode RPC operation (e.g. [21]- [25]).…”

Section: Numerical Calculationsmentioning

confidence: 99%

Review of Simulation and Modeling

Fonte¹

2012

Proceedings of XI Workshop on Resistive Plate Chambers and Related Detectors — PoS(RPC2012)

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“…This information is thus largely unknown at the moment both on the experimental and theoretical side, for the case of RPC gas mixtures. Despite some theoretical guidance on this aspect exists in the avalanche as well as streamer region ( [71], [72]), no systematic analysis exists that would allow extracting the very fundamental primary information on avalanche fluctuations from the existing data.…”

Section: The Hydrodynamic Modelmentioning

confidence: 99%

Current Challenges and Perspectives in Resistive Gaseous Detectors: a manifesto from RPC 2012.

González-Díaz¹,

Sharma²

2012

Proceedings of XI Workshop on Resistive Plate Chambers and Related Detectors — PoS(RPC2012)

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ABSTRACT:Resistive gaseous detectors can be broadly defined as a sub-type of gaseous detectors that are operated in conditions where virtually no field lines exist that connect any two metallic electrodes sitting at different potential. For most practical purposes, this condition can be operationally realized as 'no gas gap being delimited by two metallic electrodes' [1]. Since early 70's, Resistive Plate Chambers (RPCs) are the most successful implementation of this idea, that leads to fully spark-protected gaseous detectors, with solid state -like reliability at working fields beyond 100kV/cm, yet enjoying the general characteristics of gaseous detectors in terms of flexibility, optimization and customization. We present a summary of the status of the field of resistive gaseous detectors as discussed in a dedicated closing session that took place during the XI Workshop for Resistive Plate Chambers and Related Detectors held in Frascati, and especially we review the perspectives and ambitions of the community towards the XII Workshop to be held in Beijing in year 2014.

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“…n th is the electronics threshold in number of electrons, n o is the total number of primary ionizations for mips, g the gap size, α and η the multiplication and attachment coefficients, E w the weighting field and K 1 is an adimensional constant of order unity that contains the effect of avalanche multiplication statistics. The signal rise-time t rise is related to the coefficients of the electron swarm as: (1.4) in absence of Space-Charge (see [20] for a discussion). The average electron drift velocity is denoted by v e .…”

Section: Introductionmentioning

confidence: 99%

Performances of 4-gap timing RPCs for relativistic ions in the rangeZ= 1–6

et al. 2009

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We present the performance of Multi-gap timing RPCs under irradiation by fully stripped relativistic ions (γβ =2.7, Z=1-6). A time resolution of 80 ps at high efficiency has been obtained by just using standard 'off the shelf' 4-gap timing RPCs from the new HADES ToF wall. The resolution worsened to 100 ps for ∼ 1 kHz/cm 2 proton flux and for ∼ 100 Hz/cm 2 Carbon flux. The chambers were operated at a standard field of E = 100 kV/cm and showed a high stability during the experiment, supporting the fact that RPCs are a convenient choice when accommodating a very broad range of ionizing particles is needed. The data provides insight in the region of very highly ionizing particles (up to ×36 mips) and can be used to constrain the existing avalanche and Space-Charge models far from the usual 'mip valley'. The implications of these results for the general case of detection based on secondary processes (n, γ) resulting in highly ionizing particles with characteristic energy distributions will be discussed, together with the nature of the time-charge correlation curve.

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On the deterministic and stochastic solutions of Space Charge models and their impact on high resolution timing

Cited by 12 publications

References 15 publications

Review of Simulation and Modeling

Review of Simulation and Modeling

Current Challenges and Perspectives in Resistive Gaseous Detectors: a manifesto from RPC 2012.

Performances of 4-gap timing RPCs for relativistic ions in the rangeZ= 1–6

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