REMINDER of two published NIM papers on (multistage) Gridpix structures:

1) GEMGrid: a wafer post-processed GEM-like radiation detector
V.M. Blanco Carballo et al, NIM A608 (2009) 86-91
(this one you likely will not find via Inspire; don't know why)

2) TwinGrid: A wafer post-processed multistage Micro Patterned
Gaseous Detector
Y. Bilevych et al, NIM A610 (2009) 644-648


and ofcourse Victor's thesis on the Nikhef website:
https://www.nikhef.nl/pub/services/biblio/theses_pdf/thesis_V_Blanco_Carballo.pdf

Jan Timmermans