Most detector concepts developed in my group over recent years incorporate gas-avalanche electron multipliers, in which radiation-induced charges are multiplied and measured. Often, very few or only single electrons are deposited in the gas or emitted from solid or noble-liquid converters into gas, which requires detection techniques incorporating advanced multipliers. The basic research includes both theoretical and experimental studies of the physics proceees involved, such as: radiation conversion, charge transport, and avalanche of photon multiplication.
Recent research focuses also on novel cryogenic noble-liquid detectors (gasous photomultipliers and bubble-assisted liquid hole multipliers) and on very slow-ion detection via internal potential emission in semiconductor media.
Recent basic research topics:
- Gas Avalanche electron multiplier concepts: Thick Gas Electron Multipliers (THGEM), Resistive WELL (RWELL), Resistive-plate WELL (RPWELL) etc.
- Room temperature & cryogenic Gas avalanche photomultipliers (GPM)
- Bubble-assisted liquid hole multipliers: "local dual-phase noble-liquid detectors" (LHM).
- Liquid-xenon detectors for combined fast-neutron & gamma imaging.
- Ion-induced internal potential emission in semiconductor media
Selected past topics:
- Gas Avalanche electron multiplier concepts (GEM, MHSP, R-MHSP)
- Avalanche-ion blocking
- Nanodosimetry: radiation-damage evaluation at DNA scales
- Visible-photon imaging detectors
- Photoemission and photocathodes for the visible and UV range
- Secondary-electron emission
- Neutron imaging detector concepts
- Optical-readout TPC
- Single-electron counting