These facilities are open to non-lab scientists
DOE’s National Laser Users Facilities (NLUF) program enables university scientists access of OMEGA (and previously NOVA), as well as other facilities at Los Alamos, etc. - some coordination with lab scientists and technicians is required/provided
Use of the Z-Machine generally requires a Sandia collaborator, but DOE’s fusion grants program (SBSS) provides support and can facilitate collaborations