Integration study of the Portable Diagnostic Package on the Helicity Injected Torus with Steady Inductance spheromak*

An Advanced Research Projects Agency-Energy (ARPA-E) funded Portable Diagnostic Package (PDP) with high-portability has a planned deployment to the Helicity Injected Torus - Steady Inductive Upgrade (HIT-SIU) device, located at the University of Washington, Seattle. The PDP consisting of a Thomson Scattering (TS) system and an Optical Emission Spectroscopy (OES) system has been designed at the Oak Ridge National Laboratory to travel to various plasma devices relevant to fusion along with a team of researchers.  The TS and OES diagnostics are used to measure n_e, T_e, n_i, and T_i at multiple spatial positions with varying temporal resolution. The PDP will focus on measuring these key plasma parameters on HIT-SIU after the device is reconfigured from HIT-SI3.  Electron temperatures of 5-15 eV and electron densities of 1-5 x 10¹⁹ m^-3 have been measured previously in the HIT-SI3 device. The implementation of the portable system along with a sensitivity analysis of the diagnostics on the HIT-SIU device will be discussed.