Signal Induction Simulation for Frontier Gaseous and Solid-State Detectors with Resistive Elements

by Djunes Janssens (CERN)

Friday 28 Mar 2025, 11:00 → 12:15 Europe/Zurich

222/R-001 (CERN)

An increasing number of modern detector designs incorporate materials with finite conductivity to achieve various objectives, including enhanced robustness, improved spatial precision, and operation at high fluences. Notable examples can be found within the Micro-Pattern Gaseous Detector (MPGD), Resistive Plate Chamber (RPC), and solid-state sensor families—including resistive Micromegas, µRWELL, Resistive Silicon Detectors (RSDs or AC-LGADs), and 3D Diamond sensors. The continuous advancement of simulation tools, such as Garfield++, has played a crucial role in the development and understanding of particle detector technologies. Consequently, it is essential that these modeling tools keep pace with this ongoing technological progress.

This seminar presents a universally applicable method for numerically computing the signals induced in such structures using an extended version of the Ramo-Shockley theorem. Various strategies will be discussed for characterizing a broad range of resistive technologies, from MRPCs and MPGDs to solid-state detectors. This will include, techniques for incorporating the effects form externally connected impedances elements, as they can influence not only the field configuration during avalanche development—such as in the case of Silicon Photomultipliers (SiPMs)—but also signal formation and thermal noise.

This work has been developed within the framework of CERN EP R&D and is currently an active topic within the DRD collaborations, particularly DRD1 and DRD3. These methods, which describe the microscopic interactions within the detector and the resulting macroscopic observables, can provide deeper insights into the physics underlying existing detector technologies. Furthermore, they can inform and optimize the design of next-generation particle detectors by theoretically estimating performance through calculations of induced signal responses. These calculations, in turn, can guide the development of accompanying front-end electronics, optimizing them for the specific demands of future high energy physics experiments.

 

DetectorSeminar2025DjunesJanssens.pdf

DetectorSeminar2025DjunesJanssens.pptx

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