UKAEA Papers

"DISTRIBUTION OF HYDROGEN ISOTOPES, CARBON AND BERYLLIUM ON IN-VESSEL SURFACES IN THE VARIOUS JET DIVERTORS"

• J.P. Coad
• M. Rubel
• N. Bekris
• D Brennan
• D. Hole
• J. Likonen
• E. Vainonen-Ahlgren
• EFDA-JET Contributors

JET has operated with divertors of differing geometries since 1994. Impurities accumulated in the inner leg of all the divertors, and operation of the first (Mk I) divertor with beryllium tiles demonstrated that most are eroded from the main chamber walls and swept along the scrape-off layer to the inner divertor. Carbon deposited at the inner dive…

"Improvement of the Te profile on Joint European Torus measured by electron cyclotron emission"

• Patrick Blanchard
• Elena De La Luna
• Chris Gowers
• JET-EFDA Contributors

On the Joint European Torus ( JET ) , a key source of calibrated electron temperature T e profiles is from the measurements of the full electron cyclotron emission ( ECE ) spectrum made by a Fourier transform spectrometer ( FTS ) . It is absolutely calibrated by using a calibration source inside the vacuum vessel. High spatial and temporal resoluti…

"First tritium operation of ITER-prototype VUV spectroscopy on JET"

• I. H. Coffey
• R. Barnsley
• JET EFDA Contributors

"Monitoring Alfvén Cascades with Interferometry on the JET Tokamak"

• S. E. Sharapov
• B. Alper
• J. Fessey
• N. C. Hawkes
• N. P. Young
• R. Nazikian
• G. J. Kramer
• D. N. Borba
• S. Hacquin
• E. De La Luna
• S. D. Pinches
• J. Rapp
• D. Testa
• JET-EFDA Contributors

A microwave interferometry technique is applied for the first time for detecting a discrete spectrum of Alfvén cascade (AC) eigenmodes excited with fast ions in reversed magnetic shear plasmas of the Joint European Torus. The interferometry measurements of plasma density perturbations associated with ACs show an unprecedented frequency and time re…