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TY - CONF AU - Gan, P.P. AU - Huang, S. AU - Lu, Y.R. AU - Wang, S.Z. AU - Yuan, Z.X. AU - Zhu, K. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Spectral Diagnostics of Argon Plasma in a 10mm Aperture Plasma Window J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - A 10 mm diameter 60 mm long plasma window has been designed and managed to generate arc discharge with argon gas experimentally in Peking University. Based on the previous experiments and simulations, we have measured the electron temperature and density of the plasma via argon spectral diagnostics, and analyzed the conditions to satisfy the criterion of local thermal equilibrium (L.T.E). The electron temperature is in the range of 12000 K to 16000 K. The electron density is in the range of 2.2×10¹⁶ cm⁻³ to 3.2×10¹⁶ cm⁻³, increasing with discharge current and gas flow rate. The results indicate that our argon plasma is in the L.T.E status. The sealing pressure characteristics of the plasma window is mentioned as well. PB - JACoW CP - Geneva, Switzerland SP - 2978 EP - 2981 KW - plasma KW - electron KW - cathode KW - vacuum KW - ion DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-WEPIK025 UR - http://jacow.org/ipac2017/papers/wepik025.pdf ER -