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Prototype Multi-Energy Soft X-ray Diagnostic for EAST

Supported by. NSTX-U. Prototype Multi-Energy Soft X-ray Diagnostic for EAST. Kevin Tritz Johns Hopkins University. Coll of Wm & Mary Columbia U CompX General Atomics FIU INL Johns Hopkins U LANL LLNL Lodestar MIT Lehigh U Nova Photonics ORNL PPPL Princeton U Purdue U SNL

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Prototype Multi-Energy Soft X-ray Diagnostic for EAST

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  1. Supported by NSTX-U Prototype Multi-Energy Soft X-ray Diagnostic for EAST Kevin Tritz Johns Hopkins University Coll of Wm & Mary Columbia U CompX General Atomics FIU INL Johns Hopkins U LANL LLNL Lodestar MIT Lehigh U Nova Photonics ORNL PPPL Princeton U Purdue U SNL Think Tank, Inc. UC Davis UC Irvine UCLA UCSD U Colorado U Illinois U Maryland U Rochester U Tennessee U Tulsa U Washington U Wisconsin X Science LLC Culham Sci Ctr York U Chubu U Fukui U Hiroshima U Hyogo U Kyoto U Kyushu U Kyushu Tokai U NIFS Niigata U U Tokyo JAEA Inst for Nucl Res, Kiev Ioffe Inst TRINITI Chonbuk Natl U NFRI KAIST POSTECH Seoul Natl U ASIPP CIEMAT FOM Inst DIFFER ENEA, Frascati CEA, Cadarache IPP, Jülich IPP, Garching ASCR, Czech Rep NSTX-U Monday Physics Meeting PPPL, Princeton, NJ June 25th, 2012

  2. ME-SXR fast Te technique used to reconstruct RF heated Te profile between MPTS measurements L. Delgado-Aparicio, et al., JAP 102, 073304 (2007). L. Delgado-Aparicio, et al., PPCF 49, 1245 (2007). • • Reconstructed Te shows peak >4keV ~15% higher than MPTS measurement • MPTS profiles used to cross-check ME-SXR reconstruction, provide normalization

  3. Original diode-based ME-SXR system operated on NSTX during 2010 run Edge ME-SXR tangential, mid-plane view on NSTX vacuum hardware mounted on 6” Conflat attached to port-mounted gate valve amplifiers mounted on back (atmosphere-side) of Conflat flange

  4. Abel inversion of tangential ME-SXR data shows detailed edge dynamics before profile crash • • 16 kHz internal MHD mode coupled to edge • edge MHD slows prior to profile crash • • SXR profile begins to flatten • strong steepening of edge emission profile prior to crash (possible C accumulation?)

  5. Atmospheric re-entrant ‘in-vessel’ design necessary to accommodate EAST port geometry

  6. ME-SXR assembly to be mounted at mid-planeon port side wall • • ME-SXR provides coverage from edge to mid-radius • FOV footprint in plasma can be adjusted by changing mounting position/angle

  7. In vessel housing provides compact systemfor ease of mounting

  8. Expanded view of ME-SXR assembly

  9. Toroidally-displaced core/edge ME-SXR systems currently proposed for EAST under DOE international solicitation • • ME-SXR proposed in “International collaboration to advance the three dimensional science of stability and control for long-pulse, high-performance tokamaks” Gates/Sabbagh • System designed to study lithium effects on ELM and MHD/NTM behavior, disruption pre-cursors and thermal quench, and positioned to study effects of planned 3D coils on plasma

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