Oct 13 – 18, 2019
Lafodia Sea Resort, Lopud Island, Croatia
Europe/Zurich timezone

Design of a Segmented LGAD Sensor for Development of 4-D Tracking Detector

Not scheduled
Lafodia Sea Resort, Lopud Island, Croatia

Lafodia Sea Resort, Lopud Island, Croatia



sayaka Wada (University of Tsukuba)


The tracking detector capable of recording the hit-time information in a precision of O(10ps) should become a breakthrough device in future hadron collider experiments to resolve signal tracks in the harsh environment with enormous background tracks. LGAD (low-gain avalanche detector) is one of such candidates, which is expected to provide fine spatial resolution at the same time; hence to realize a 4-D tracking detector. We have fabricated LGAD diodes and segmented strip-type detectors at Hamamatsu Photonics. The performance other than the timing resolution has been reported elsewhere [1]. Recently the pad type detectors were tested in a proton beam and we obtained a time resolution better than 30 ps for the devices with 50 m active thickness. The gain non uniformity across the strip [1] was modeled in a TCAD simulation, which was then used to design segmented LGAD sensors with uniform gain. The study suggests that uniform LGAD sensors can be made maintaining a wider operation bias voltage range. We report the test beam and the TCAD simulation results.

Primary authors

sayaka Wada (University of Tsukuba) Ohnaru Kyoji (University of Tsukuba) Kazuhiko Hara (University of Tsukuba (JP)) Koji Nakamura (High Energy Accelerator Research Organization (JP)) Yoshinobu Unno (High Energy Accelerator Research Organization (JP))

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