Spinal cord injury inflicts considerable damage on human physical and physiological regulation and cellular integrity. Although drug therapy and functional electrical stimulation are currently used as treatment, neuronal regeneration in the Central Nervous System (CNS) is crucial for re-establishing neural pathways and function. Regeneration researchers strive to create the most permissive environment for neural growth through strategies such as manipulating gene expression, removing inhibitory factors of glial cells, making antibodies against destructive myelin-associated proteins, injecting neurotrophins and other growth factors, grafting Schwann cells and olfactory ensheathing cells, and even introducing pluripotent stem cells.
Magnetic fields both positively and negatively affect the electron beam orbit in a 100 keV beamline in the Test Lab, Injector Test Stand (ITS) at Thomas Jefferson National Accelerator Facility (Jlab). DC air-core magnets and iron solenoid magnets are used to steer and focus the electron beam throughout the beamline, but time-varying magnetic fields (prominent at power line frequency) adversely modulate the electron beam orbit. We took a number of steps to identify the sources of these fields and engineer a design to shield the beamline.