List of Figures

1. Overview of the target setup. Shown are the laser hut, the beam pipes covering the laser beam line extending to the target area, and the Helmholtz coils with the RF assembly and support sub-assembly.
2. A topview of the laser hut shows the location of the interlocked door as well as the position of the laser table where all lasers and optics will be set up.
3. Top view of the optics setup inside the laser hut. All items are on a laser table which is sitting on a mezzanine inside the laser hut
4. Adjusting back-scattering light
5. Typical 40 cm polarized $^3$He target cell used in this experiment.
6. Schematic diagram of the target ladder and target positions.
7. Schematic diagram of the target cell oven control system. The instruments in the dashed box are located upstairs, while the remaining components are located in the Hall in the vicinity of the target. For clarity, the interlock circuitry is not shown (see Figure ).
8. Schematic diagram of the oven heater interlock system. The switches represent relays. In normal operation, the relays are energized (contacts closed). An alarm condition (or instrument power failure) will de-energize (open) the corresponding relays, interrupting the interlock circuit. The instruments are programmed such that their dual alarm outputs operate simultaneously.
9. Top view of the longitudinal and transverse Helmholtz coils used in the polarized $^3$He target setup. The RF coils are needed to perform NMR as well as EPR measurements. The 0$^{\circ}$ angle gives the incident electron beam direction. The dashed lines indicate the coils main axis, the long bold arrow indicates the holding field direction which can be rotated from 0$^{\circ}$ to 360$^{\circ}$. We also show the laser beam longitudinal and transverse directions.
10. The electronics is located in the Counting House A.
11. Description of the cabling of the NMR system. 10 cables go from the counting house to the target location in the hall : 8 (main+sensing) ESSEX AWG 10 for the Helmholtz coils, 1 RG58A/U for the RF coils and 1 RG58A/U for the pick-up coils.
12. Circuit for EPR lineshape measurement
13. Circuit for EPR measurement with AFP spin flip
14. Circuit for continuous EPR measurement with field feedback
15. Schematic of reference cell system
16. Valve configuration of the reference cell gas system
17. Control panel
18. Optical Setup in the Laser Hut
19. The Polarized $^3$He Target Laser Hut Setup