Authors established and quality-controlled a 10 cm x 10 cm GEM foil production facility at FTD Bonn, achieving uniform 70/50 μm holes and <1 nA leakage at 600 V.
Progress on large area GEMs (VCI 2010)
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abstract
The Gas Electron Multiplier (GEM) manufacturing technique has recently evolved to allow the production of large area GEMs. A novel approach based on single mask photolithography eliminates the mask alignment issue, which limits the dimensions in the traditional double mask process. Moreover, a splicing technique overcomes the limited width of the raw material. Stretching and handling issues in large area GEMs have also been addressed. Using the new improvements it was possible to build a prototype triple-GEM detector of ~ 2000 cm2 active area, aimed at an application for the TOTEM T1 upgrade. Further refinements of the single mask technique give great control over the shape of the GEM holes and the size of the rims, which can be tuned as needed. In this framework, simulation studies can help to understand the GEM behavior depending on the hole shape.
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physics.ins-det 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
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GEM Production at the FTD in Bonn
Authors established and quality-controlled a 10 cm x 10 cm GEM foil production facility at FTD Bonn, achieving uniform 70/50 μm holes and <1 nA leakage at 600 V.