Comparison of inboard-outboard pedestal temperature measurements in JET using ECE diagnostics

L. Barrera, E. De La Luna, L. Figini

Research output: Contribution to conferencePaper

Abstract

Despite considerable effort, both theoretically and experimentally, a complete physical model to describe the particle and energy losses during ELMs is far from complete. On the experimental front, improved description of the spatial structure (poloidal asymmetry, radial distribution) and the dynamics of the ELM crash is a key requirement to answer some of the basic outstanding questions concerning the physics of ELMs. A significant number of diagnostics is now capable of fast measurements of the pedestal profile during an ELM, however, there is a lack of data from the inboard midplane, so assumptions of poloidal symmetry on the flux surfaces have often to be made. The aim of this work is to explore the capabilities of the electron cyclotron emission (ECE) diagnostics to provide simultaneous measurements of the edge temperature for both inboard and outboard plasma midplane. Access to the inboard region of the plasma is achieved in JET by using 1stharmonic/O-mode polarization, as it is not affected by harmonic overlap with the 2ndharmonic. This paper focuses on the validation of the inboard ECE data and the identification of the limitations of the measurements and the data analysis. © 2008 American Institute of Physics.
Original languageEnglish
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventInternational Conference on Burning Plasma Diagnostics - , Italy
Duration: 1 Jan 2008 → …

Conference

ConferenceInternational Conference on Burning Plasma Diagnostics
CountryItaly
Period1/1/08 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Barrera, L., De La Luna, E., & Figini, L. (2008). Comparison of inboard-outboard pedestal temperature measurements in JET using ECE diagnostics. Paper presented at International Conference on Burning Plasma Diagnostics, Italy. https://doi.org/10.1063/1.2905052