V.M. Blanco Carballo

Applications of GridPix detectors

GridPix detectors provide an excellent tracking and vertex determination for internal radioactive sources with a 4p angular acceptance. In both WIMP search and neutrinoless double beta decay experiments, we expect that GridPix detectors have the ability to significantly improve the measurements.

New results from GridPix detectors

GridPix detector prototypes have been made using a TimePix pixel chip and a PSI 46 pixel chip. A system of discharge protection has been successfully tested. GridPix detectors have been tested using cosmic rays, a 90Sr source and the T9 test beam facility at CERN. GridPix detectors perform well for 3D track reconstruction, dE/dx measurements and transition radiation detection.

A miniaturized multiwire proportional chamber using CMOS wafer scale post-processing

This paper presents the technology of a new microsystem consisting of a CMOS chip with integrated high voltage electrodes, to be used as a detector for ionizing radiation. Its application ranges from particle detection in nuclear and high-energy physics to X-ray detection for materials research and medical purposes. In this paper, the process integration is detailed and system trade-off considerations are reported

Charge protection characterisation and drift time resolution improvement for GridPix

A GridPix detector is a gaseous detector capable of detecting single primary electrons from ionising particles. Such a detector consists of a pixel chip as active anode covered with a thin layer of silicon rich silicon nitride (SiRN) for protection against discharges. A layer of 8 µm SiRN, and according recent tests even 4 µm, is sufficient to protect against discharges. The effect of the thickness of the SiRN layer on the operation of a detector has been determined.