Speaker
Description
The essential performance criteria for novel 4D tracking sensors are high-precision timing, fine spatial resolution, high-rate capability, and low material budget.
Low Gain Avalanche Diode (LGAD) sensors provide this combination of capabilities, which makes them valuable in high-energy physics, nuclear experiments, beam monitoring, and medical applications such as ionCT.
While widely used single-sided LGAD strip sensors offer excellent rate and timing capability, they require two layers to provide both X and Y position coordinates. Integrating both coordinates into a single sensor would significantly simplify experimental systems and reduce the active area's material budget.
Within a broader collaboration between several institutes, coordinated and led by the GSI, we have developed a concept to transform single-sided LGADs into double-sided detectors.
For this project, single-sided conventional strip LGAD sensors with a total thickness of 200 µm and an active thickness of 85 µm, produced in 2020 at FBK for HADES experiment, were used.
Importantly, this design enables dual-sided functionality without increasing the total sensor thickness, and the procedure can be applied to sensors with any active thickness.
This contribution details the concept and the processing steps required to fabricate these devices. We present results obtained using a 90Sr source and proton beam tests, which demonstrate the stable operation and expected performance of the prototype double-sided LGAD strip sensors. To our knowledge, this represents the first successfully operating prototype of a thin double-sided strip LGAD sensor.