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TY - CONF AU - Mallick, C. AU - Bandyopadhyay, M. AU - Kumar, R.K. AU - Tewari, S.V. ED - Schaa, Volker RW TI - Magnetic Field Design for 2.45 GHz Negative Hydrogen PMECRIS Chamber using FEM Simulation J2 - Proc. of ECRIS2016, Busan, Korea, August 28 - September 1, 2016 C1 - Busan, Korea T2 - International Workshop on ECR Ion Sources T3 - 22 LA - english AB - Negative hydrogen ECRIS plasma is confined by NdFeB permanent magnet antenna around cylindrical cavity wall. Measured axial and radial magnetic field is benchmarked with the simulated data. Four axially magnetized ring magnets of remanance flux density of 1.17T is simulated using bounded current ampere's law technique. Gradient of radial and axial magnetic flux density is calculated to estimate lighter ions leaking out of the plasma wall sheath region. The peak values of radial magnetic field gradient between plasma sheath region and cavity outer wall surface increases from 0.1x10⁷ A/m2 to -0.2x10⁷ A/m2 respectively. Axial magnetic field gradient along inner ECR chamber wall increases from -2.1x10⁷ A/m2 to 2.5x10⁷ A/m2 .ECR contour dimensions of 875 Gauss which corresponds to microwave plasma resonating frequency of 2.45GHz is of thickness ~1mm and having major and minor radius of 30mm and 28mm respectively. PB - JACoW CP - Geneva, Switzerland SP - 118 EP - 121 KW - ion KW - plasma KW - ECR KW - simulation KW - ECRIS DA - 2016/10 PY - 2016 SN - 978-3-95450-186-1 DO - 10.18429/JACoW-ECRIS2016-WEPP32 UR - http://jacow.org/ecris2016/papers/wepp32.pdf ER -