GOHI Technology (Wuhan) Co.,Ltd-Micromegas Tracking Detectors

Micromegas Detector

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Micromegas (Micro-Mesh Gaseous Structure) is a high-performance micro-pattern gaseous detector (MPGD). Its core structure consists of a thin metallic micro-mesh and a readout anode plane, separated by a narrow gap of only tens to one hundred micrometers, across which a high electric field is applied. This design enables the ionization electrons, produced by charged particles in the gas, to rapidly drift into the gap and induce large avalanche signals, thereby achieving submillimeter spatial resolution and nanosecond-level time response.

Based on patented thermal bonding method and strict quality control system, we can offer reliable large-size Micromegas detectors.

Detector Key Features:

Active area:	150×150 mm², 400×400 mm², 600×600 mm²
Avalanche gaps:	100 μm, 300 μm, 500 μm (optional)
Readout strip pitch:	400 μm for 150×150 mm², 400 μm, 800μm, 1.6mm (optional) for 400×400 mm²
Resistive anode:	400 nm Ge, ~100MΩ/sq
X-Y 2D readout scheme:	Single-side readout for 150×150 mm² and 400×400 mm² models; Back-to-back readout for 600×600 mm² model
Readout connector:	Hirose 140 pins (128 signal pins)
Spatial resolution:	<100 μm（~70 μm for 150×150 mm² model）
Counting rate:	>100 kHz/cm² (standard type); >1 MHz/cm² (fast grounding type)
Maximum gas gain:	> 5×10⁴ @ 5.9 keV X-rays for 150×150 mm²
Detection efficiency:	>95% for MIPs; 98% for 150×150 mm² model in beam test
Gas mixture:	Normal gas

2D readout structure

single-side readout

back-to-back readout

The 600mm×600mm Micromegas detector

Custom Design Service:

• Single-mesh or double-mesh structure

• Low material budget and low radiation background

• Wide gas pressure adaptability (30 mbar to 10 bar)

• Different size with optional features

Also, we can offer the readout electronics and whole system soluation. Any questions, feel free to contact us!