Design Parameters and Objectives of a High-­Resolution X-­ray Imaging Crystal Spectrometer for the Large Helical Device (LHD)

Technical Report · Wed May 19 04:00:00 EDT 2010

DOI:https://doi.org/10.2172/981706· OSTI ID:981706

Bitter, M; Gates, D; Neilson, H; Reiman, A; Roquemore, A L; Morita, S; Goto, M; Yamada, H

A high-resolution X-ray imaging crystal spectrometer, whose instrumental concept was thoroughly tested on NSTX and Alcator C-Mod, is presently being designed for LHD. The instrument will record spatially resolved spectra of helium-like Ar16+ and provide ion temperature profiles with spatial and temporal resolutions of 1 cm and > 10 ms which are obtained by a tomographic inversion of the spectral data, using the stellarator equilibrium reconstruction codes, STELLOPT and PIES. Since the spectrometer will be equipped with radiation hardened, high count rate, PILATUS detectors,, it is expected to be operational for all experimental conditions on LHD, which include plasmas of high density and plasmas with auxiliary RF and neutral beam heating. The special design features required by the magnetic field structure at LHD will be described.

• Research Organization: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC)
• OSTI ID: 981706
• Report Number(s): PPPL-4514
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DESIGN
HEATING
ION TEMPERATURE
MAGNETIC FIELDS
RADIATIONS
SPECTRA
SPECTROMETERS
STELLARATORS
X-ray Spectroscopy