Location: Tsung-Dao Lee Institute, Shanghai
Open meeting: April 10-11, 2026
Focused Physics Program: April 6-9, 2026 (Low Energy Nuclear Physics in Dark Matter and Neutrino Physics)
We will hold the 2nd International Open Meeting for PandaX-xT on April 10 and 11, 2026. PandaX (Particle and Astrophysical Xenon project, https://pandax.sjtu.edu.cn/) is an experimental program that employs a series of xenon detectors to search for elusive dark matter particles and to study the fundamental properties of neutrinos. Up to now, the collaboration has constructed and operated three generations of experiments, PandaX-I, PandaX-II, and PandaX-4T, with active target masses of 120 kg, 580 kg, and 3.7 tonnes, respectively, producing many results at the forefront of dark matter search and neutrino studies.
The PandaX collaboration is actively preparing for the next phase, PandaX-xT, a multi-ten-tonne liquid xenon, ultra-low background, and general-purpose observatory. The full-scaled PandaX-xT contains a 43-t liquid xenon active target, opening new windows of discovery in dark matter, Majorana neutrinos, low-energy astrophysical neutrinos, and other ultra-rare interactions. PandaX-xT may seek further upgrades utilizing isotopic separation of natural xenon. The published conceptual design of PandaX-xT can be found at https://arxiv.org/pdf/2402.03596. We plan to develop the experiment in stages, with the 20T stage starting in 2027.
At this meeting, we will introduce the current experimental design of PandaX-xT and the status of the development of various subsystems including:
- Experimental hall infrastructure
- Outer veto detector
- Inner veto detector
- Low background Cryostat
- Time Projection Chamber
- Photosensors, Cold PCBs, and Cabling
- Readout electronics
- Data-acquisition and Online System
- Liquid xenon storage and transfer
- Cryogenics and Re-circulation
- Distillation System
- Calibration System
- Slow Control and Offline Computing
We openly invite experts around the globe to share insights on the scientific opportunities enabled by such an observatory, as well as technical challenges. We also warmly invite international collaborators. Participants are encouraged to submit abstracts for talks to present their interests and potential contributions on topics related to PandaX-xT. Prior registration will be required to participate.
To facilitate international visitors, a focused physics program will be arranged at TDLI in Shanghai from April 6 to 9. The program can be extended to the following week according to needs. You are welcome to give seminars and have in-depth discussions with local people.
