Fig. 1.1 Mass Driver Two Assembly. At this time the superconducting bucket wasn't ready for firing in the mass driver. An ohmic bucket was then built, see Chapter 3, to simulate the superconducting bucket without the need for liquid helium, vacuum system, and guide strips. The ohmic bucket became a major enterprise of its own in addition to the accelerator. In order to get the ohmic bucket moving into the accelerator while its current remained near its peak value, it required and injection system. The recharge capacitor banks for phases one and two were also constructed at this time and can be seen in Fig. 1.2 along with the accelerator, injector coils, and an ohmic bucket. The control circuitry used to operate the mass driver during these early tests is shown in Fig. 1.3. At this time a decision was made to complete only the 1.25m accelerator section. The added systems needed to operate the mass driver and the growing complexity was pushing the schedule far behind what was planned.
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