Development of Groove Gaseous Multiplier

Micro-pattern gaseous detector （MPGD） meets difficulties on manufacture, discharge and distortion. Devoting to solve the problems, the Groove gaseous multiplier was promoted. The performance of Groove was measured at 8.04 keV copper target X-ray. The comparison of the signal shape and the result of Garfield++ simulation displayed the signal was dominated by the ion conduction. The Groove with 0.2 mm slot width and 0.8 mm thickness operated in 93%Ar+7%CO₂ mixture achieves the best gain of 3×10⁴, and the best energy resolution of 15.6%.