The THGEM: A thick robust gaseous electron multiplier for radiation detectors

Systematic investigation of critical charge limits in Thick GEMs

“…Some THGEM variants have the metal around the holes chemically etched, which creates metal-free rims surrounding the holes. Large rims with a width of (100 μm) allow for an order of magnitude higher gains, thus improving stability against electrical discharges [4,5], at the cost of long-term gain dependence on time and radiation rate [6]. The latter is marginal when employing THGEMs with a small (≲20 μm) or no rim [6].…”

Development of an advanced two‐dimensional microdosimetric detector based on THick Gas Electron Multipliers

“…Having a small size detector sensitive volume requires having a high multiplication gain to achieve a reasonable signal to noise ratio. It has been shown that using a multiple‐GEM arrangement (for different applications) has the advantage of increase in gain without impractical high voltage across the THEGM . Hence, the double‐THGEM arrangement was assembled using the MILPLEX THGEMs and the detector response was investigated.…”

“…However, THGEM is relatively easy to manufacture and handle and large sizes can be envisaged. Moreover, due to the structure, cascading THGEMs is possible to achieve higher gain at lower THGEM voltage, which decreases the discharge probability …”

Systematic investigation of critical charge limits in Thick GEMs

“…Some THGEM variants have the metal around the holes chemically etched, which creates metal-free rims surrounding the holes. Large rims with a width of O(100 µm) allow for an order of magnitude higher gains, thus improving stability against electrical discharges [4,5], at the cost of long-term gain dependence on time and radiation rate [6]. The latter is marginal when employing THGEMs with a small ( 20 µm) or no rim [6].…”