1–4 Oct 2024
Kraków, Poland
Europe/Warsaw timezone

A gaseous time projection chamber with Micromegas readout for low-radioactive material screening

1 Oct 2024, 16:20
20m
PAU (Kraków, Poland)

PAU

Kraków, Poland

Sławkowska 17

Speaker

Wenming Zhang (School of Physics and Astronomy, Shanghai Jiao Tong University)

Description

Low-radioactive material screening is becoming essential for rare event search experiments. A gaseous time projection chamber (TPC) can be used for such purposes with large active areas and high efficiency. A gaseous TPC with a Micromegas readout plane of approximately 40 × 60 cm2 is successfully constructed for surface alpha contamination measurements. We have characterized the energy resolution, gain stability, and tracking capability with calibration sources. With the unique track-related background suppression cuts of the gaseous TPC, we have established that the intrinsic alpha background rate of the TPC is (0.17 ± 0.02)×10−6 Bq/cm2. The surface-treated acrylic samples from the JUNO collaboration are currently being tested in the TPC.

Primary author

Wenming Zhang (School of Physics and Astronomy, Shanghai Jiao Tong University)

Presentation materials