Fast Tomographic Arrays for Monitoring Reconnection and Flux Rope Dynamics in PHASMA

A fast (>200MHz) tomographic array using photodiodes has been developed and implemented on the PHASe MApping experiment (PHASMA). Using custom built low noise transimpedance electronics paired with large-area blue enhanced silicon PIN diodes, an array of 16 photodetectors has been used to create a 64-pixel proof of concept for monitoring broadband dynamics arising due to electron-only magnetic reconnection between flux ropes in PHASMA. Visible light tomography clearly shows the sub-microsecond fluctuations in visible light arising due to 3D kink instability of the flux ropes. Here we present tomographic analysis from the 16 detector array and preliminary results from a fully 3D array. The 3D array provides high-bandwidth, fully 3-dimensional time resolved observations of flux rope dynamics during reconnection in PHASMA.