Show/Hide Menu
Hide/Show Apps
anonymousUser
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Frequently Asked Questions
Frequently Asked Questions
Communities & Collections
Communities & Collections
Overview of the beam emission spectroscopy diagnostic system on the National Spherical Torus Experiment
Download
index.pdf
Date
2010-10-01
Author
Smith, D. R.
Feder, H.
Feder, R.
Fonck, R. J.
Labik, G.
McKee, G. R.
Schoenbeck, N.
Stratton, B. C.
Uzun Kaymak, İlker Ümit
Winz, G.
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
6
views
9
downloads
A beam emission spectroscopy (BES) system has been installed on the National Spherical Torus Experiment (NSTX) to study ion gyroscale fluctuations. The BES system measures D-alpha emission from a deuterium neutral heating beam. The system includes two optical views centered at r/a approximate to 0.45 and 0.85 and aligned to magnetic field pitch angles at the neutral beam. f/1.5 collection optics produce 2-3 cm spot sizes at the neutral beam. The initial channel layout includes radial arrays, poloidal arrays, and two-dimensional grids. Radial arrays provide coverage from r/a approximate to 0.1 to beyond the last-closed flux surface. Photodetectors and digital filters provide high-sensitivity, low-noise measurements at frequencies of up to 1 MHz. The BES system will be a valuable tool for investigating ion gyroscale turbulence and Alfven/energetic particle modes on NSTX. (C) 2010 American Institute of Physics. [doi:10.1063/1.3478660]
Subject Keywords
Instrumentation
URI
https://hdl.handle.net/11511/40223
Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
DOI
https://doi.org/10.1063/1.3478660
Collections
Department of Physics, Article