 | Proposed target structure for the 1500-foot Mark II accelerator. Scale is given by the two figures at lower right. |
 | Schematic of Mark II, 1500 feet long. The injector is at near end, target at far. |
| Proposed target structure for the 1500-foot Mark II accelerator. Scale is given by the two figures at lower right. |
| Schematic of Mark II, 1500 feet long. The injector is at near end, target at far. |