Triple grating polychromator for Thomson scattering.
M. Greenwald,W. I. B. Smith +1 more
TL;DR: A high rejection, high transmission, triple grating polychromator with crossed dispersion with cross dispersion has been designed and constructed for Thomson scattering plasma diagnostics.
read more
Abstract: A high rejection, high transmission, triple grating polychromator with crossed dispersion has been designed and constructed for Thomson scattering plasma diagnostics. Identical gratings, collimating, and field lenses were used for all three stages. A mechanically convenient arrangement was made possible by using the field lenses to adjust the dispersion of the second stage to the required design value. The transmission in the passband for light polarized perpendicular to the rulings of the grating was measured at 33% for the instrument itself, and at 15% through the instrument and 1.8 m of attached fiber optics. With the 30-nm passband set 4–34-nm wavelengths away from the ruby laser line, the order of 10−11 of 694-nm light incident in the input slit was present in each 3-nm wide output channel, giving a relative rejection factor of 10−10.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Field‐reversed experiments (FRX) on compact toroids
TL;DR: The rotational instability of toroid plasmas in field-reversed theta-pinch experiments (FRX) has been investigated in this article, where the authors have shown that the toroid configuration remains in a stable equilibrium for up to 50 μsec followed by the destructive n = 2 rotation.
292
Thomson scattering on a low-pressure, inductively-coupled gas discharge lamp
TL;DR: In this paper, an experimental system for laser Thomson scattering on a low-pressure, inductively-coupled gas discharge lamp and measurements of ne and Te in this lamp are presented.
89
Laser scattering on low temperature plasmas : high resolution and stray light rejection
MJ Marco Sande,van de +1 more
- 01 Jan 2002
TL;DR: In this paper, the effect of coherent Thomson scattering and the influence of the laser on plasma are discussed briefly and a calibration method to measure densities in an absolute manner is described and the derivation of the Electron Energy Distribution Function (EEDF) from a measured Thomson spectrum is discussed.
Thomson scattering from an ICP
Mao Huang,Gary M. Hieftje +1 more
TL;DR: In this article, the theory concerning how electrons in the plasma scatter incident laser light and how the scattered-light spectra are related to electron-density fluctuations is briefly described, and special problems and detailed experimental considerations for Thomson scattering from an ICP are discussed.
52
Multipoint Thomson scattering
F. M. Levinton,G. A. Navratil +1 more
TL;DR: In this paper, a multianode microchannel plate (MCP) with a 25mm−diam multialkali photocathode was used for single shot measurement of electron temperature and density profiles in a magnetically confined plasma.
15
References
Diffraction gratings (manufacture)
TL;DR: In this paper, the development of interference (or 'holographic') techniques for manufacturing spectroscopic diffraction gratings, and the relationship between ruled gratings and those made interferometrically, are discussed.