Los Alamos Neutron Science Center (LANSCE)

Serving an international user community in support of civilian and national security research

The Los Alamos Neutron Science Center (LANSCE) supports nuclear physics and material science, helping ensure the safety and reliability of the nuclear stockpile. In addition to national security research, the LANSCE User Facility supports a vibrant research program in fundamental neutron and proton science, providing the scientific community with intense sources of neutrons and protons to perform experiments supporting civilian research and the medical and research isotope production.

The LANSCE User Program plays a key role in training the next generation of scientists and attracting the best graduate students, postdoctoral researchers, and early-career scientists. The U.S. Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) work with the Office of Science and the Office of Nuclear Energy, which have synergistic long-term needs for the linear accelerator and the neutron science that is the heart of LANSCE.

LANSCE is a NNSA designated national user facility.

LANSCE Beam and Operations Schedules

National Defense Authorization Act (NDAA)

Effective April 15, 2025, the NDAA imposes restrictions on onsite and cyber access to non-public facilities at national security laboratories for researchers who are currently citizens of China, Russia, North Korea, and Iran.

Los Alamos National Laboratory will therefore be rescinding physical and cyber access for any previously approved citizens of these countries whose authorization extends beyond April 14, 2025. It's important to clarify that these provisions do not affect U.S. Citizens (including dual citizens) or Lawful Permanent Residents (LPR) from these four countries.

The LANSCE User Facilities will accept user proposal submissions that include researchers (but not the whole team) with citizenship from the aforementioned countries. However, in accordance with the NDAA, we must emphasize that we cannot accommodate any members of your research team onsite or requesting cyber access that hold citizenship from these countries.