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Description
The Low Gain Avalanche Diodes (LGADs) are silicon detectors that use the impact ionization process to achieve gain values of about $\mathcal{O}$(10). One of the important factors to consider when using LGADs for experiments studying charged cosmic rays in space is their timing performance. While conventional silicon microstrip sensors only provide spatial information of the charged particles passing through the tracker, LGADs have the potential to provide additional timing information. This study demonstrates that an LGAD, with an active area of approximately 1 cm², can achieve a jitter of less than 40 ps. The devices used in this study consist of pad sensors with three different thicknesses. Each thickness contains three different active areas and three layout designs for each area. The timing performance of these devices is evaluated using a pulsed infrared laser. Different layout designs and gain layers are compared to determine the best time resolution. The timing performance is estimated in terms of signal uniformity, gain, noise, and jitter.
