Speaker
Description
Particle tracking in high-energy physics experiments requires tracking detectors with large sensitive area, good spatial resolution, and high counting rate capability. This contribution presents research and development on large-area, high-performance micro-Resistive Groove (μRGroove) detectors. Two μRGroove detectors with fast-grounding line arrays and sensitive areas of 50 cm × 50 cm and 100 cm × 50 cm were designed and fabricated based on the PEP (Parttern Etching Plating) process. Benefiting from the single-stage amplification structure of μRGroove, large-area μRGroove detectors feature stable structure without tension, good scalability and convenient installation. Due to good geometry compatibility between the groove multiplication structure and the fast-grounding lines, the dead area introduced by the fast grounding lines can be less than 1.6%. The basic performance of the large-area μRGroove detectors was tested using X-rays. From the X-ray test results, the gas gain is comparable to that of small-area μRGroove detectors; the signal gain uniformity is approximately 7%; and the counting rate capability for MIP is approximately 2.4 MHz/cm² . Furthermore, beam tests of both detectors were conducted at the CERN SPS-H4 beamline. Both detectors achieved detection efficiencies greater than 97% and position resolutions better than 70 μm. Notably, the 100 cm × 50 cm μRGroove detector showed no significant degradation in gain or position resolution under high-flux pion beam irradiation exceeding 1 MHz/cm². Optimizations are being implemented to impove the detector structure and position reconstruction performance of large-area μRGroove detectors.
| Name of the speaker | Lunlin Shang |
|---|---|
| Eligible for the Georges Charpak Young Scientist Award. | no |