V.M. Blanco Carballo
H. van der Graaf
- TwinGrid: A wafer post-processed multistage Micro Patterned Gaseous Detector
- Nuclear Instruments & Methods in Physics Research Section A - Accelerators Spectrometers Detectors and Associated Equipment
- Volume | Issue number
- 610 | 3
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Institute for High Energy Physics (IHEF)
This paper presents a new multistage Micro Patterned Gaseous Detector (MPGD) made by wafer post-processing. The device consists of a double metal grid supported by SU-8 structures on top of a Timepix chip. The detector has been operated with He/iC(4)H(10) and Ar/iC(4)H(10) gas mixtures. Cosmic rays as well as Fe-55 decay events have been recorded using the Timepix chip in 2D and 3D readout modes. The detector can be operated like a Micromegas (high field close to the chip) or like a GEM (amplification stage followed by a low extraction field). This approach for manufacturing GEM-like radiation imaging detectors allows for precise dimensional control and considerable geometrical design freedom.
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