We present the detailed design and hardware implementation required to build a laser wire scanner for H- bunches at the Los Alamos Neutron Science Center (LANSCE) in the low energy beam transport (LEBT) section of the LANSCE beam line. The presented design is modular and supports a variety of input laser beam orientations, as well as differing laser beam diameters and powers. A custom-built laser interaction point, and drift chamber are added to the current beam line to photo-ionize the H- secondary electrons and collect the freed electrons in a custom-built, high-speed Faraday cup detector. Our chamber design is modular and constructed to minimally impact LANSCE production, while also allowing for in-run cycle reconfigurations. This setup will allow for the testing of a variety of laser system diagnostics configurations at the LANSCE facility. Future directions for direct separation and spatially resolved detection of the neutral hydrogen and charged anions will also be presented.

Traditional phase scans at LANSCE are useful for tuning longitudinal capture but provide only indirect information about the bunch distribution. This work extends a deep neural network-based reconstruction method to the first two modules of the side-coupled cavity linac. Simulated two-dimensional phase scans were generated with HPSim by varying the RF phases of Modules 5 and 6 and recording the transmitted current after the absorber/collector diagnostic. A retrained network reconstructed correlated Gaussian longitudinal phase space distributions from these scans, recovering their approximate size, orientation, and centroid. These results support further development using realistic distributions and measured CCL phase scans.