NSTX NSTX APS – April 2010, Washington, DC– ME-SXR imaging (Delgado-Aparicio)February, 12-17 th , 2010 Multi-energy SXR imaging for magnetically confined fusion studies Luis F. Delgado-Aparicio Princeton Plasma Physics Laboratory APS – April meeting, Washington, DC, USA February, 12-17, 2010 College W&M Colorado Sch Mines Columbia U CompX General Atomics INEL Johns Hopkins U LANL LLNL Lodestar MIT Nova Photonics New York U Old Dominion U ORNL PPPL PSI Princeton U Purdue U SNL Think Tank, Inc. UC Davis UC Irvine UCLA UCSD U Colorado U Illinois U Maryland U Rochester U Washington U Wisconsin Culham Sci Ctr U St. Andrews York U Chubu U Fukui U Hiroshima U Hyogo U Kyoto U Kyushu U Kyushu Tokai U NIFS Niigata U U Tokyo JAEA Hebrew U Ioffe Inst RRC Kurchatov Inst TRINITI KBSI KAIST POSTECH ASIPP ENEA, Frascati CEA, Cadarache IPP, Jülich IPP, Garching ASCR, Czech Rep U Quebec NSTX NSTX Supported by
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Multi-energy SXR imaging for magnetically confined fusion studies
NSTX. Supported by. Multi-energy SXR imaging for magnetically confined fusion studies. College W&M Colorado Sch Mines Columbia U CompX General Atomics INEL Johns Hopkins U LANL LLNL Lodestar MIT Nova Photonics New York U Old Dominion U ORNL PPPL PSI Princeton U Purdue U SNL - PowerPoint PPT Presentation
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Motivation for the development of Multi-Energy Soft X-ray (ME-SXR) systems
1. The motivation for the construction of ME-SXR arrays is the development of versatile diagnostics which can serve a wide range of MCF experiments for a number of critical simultaneous profile
measurements.
2. Useful in a wide variety of applications.
1. Compared to magnetic measurements at the wall, the ME-SXR technique has advantages for low-f MHD detection, such as spatial
localization and insensitivity to stray magnetic fields.
1. Evaluate discrepancies between Thomson Scattering and Electron Cyclotron Emission diagnostics for electron temperature
Principle of the “optical” soft x-ray (OSXR) array
20 m CsI:Tl deposition
X-rays from NSTX plasma (vaccum side)
Visible light system (air side)
Fiber optic vaccum window (FOW)
=550 nm
It’s a system that uses a fast (~1 s) and efficient scintillator (CsI:Tl) in order to convert soft x-ray photons (0.1<Eph<10 keV) to visible green light (~550 nm).
To discrete channels and light detectors (PMT, APD, Image intensifier)
Benefits of optical-based SXR array• High spatial resolution (~1 cm)• Spatial oversampling• Filter/energy band versatility• Simple design and components
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Edge optical-based ME-SXR system under construction for NSTX (2010 run)
1. The motivation for the construction of ME-SXR arrays is the development of versatile diagnostics which can serve a wide range of MCF experiments for a number of critical simultaneous profile measurements.
2. Useful in a wide variety of applications: a) RF heating, b) particle transport, c) thermal transport and d) a variety of MHD events.
3. Compared to magnetic measurements, the ME-SXR technique has advantages for low-f MHD detection, such as spatial localization and insensitivity to stray magnetic fields.
4. The use of thinner filters will allow imaging and measurements of pedestal & gradient regions using continuum and impurity line-emission.
5. Recommend the use of few ME-SXR cameras (tangential/poloidal views) in multiple toroidal locations for study of non-axisymmetric perturbations.
• The Johns Hopkins University: Gaib Morris, Scott Spangler, Steve Patterson, Russ Pelton and Joe Ondorff.
• Princeton Plasma Physics Laboratory: Bill Blanchard, Patti Bruno, Thomas Czeizinger, John Desandro, Russ Feder, Jerry Gething, Scott Gifford, Bob Hitchner, James Kukon, Doug Labrie, Steve Langish, Jim Taylor, Sylvester Vinson, Doug Voorhes and Joe Winston (NSTX).
• This work was supported by The Department of Energy (DOE) grant No. DE-FG02-86ER52314ATDOE