Conference Papers

Showing 1 - 10 of 162 Conference Paper Results
2021
UKAEA-CCFE-CP(21)12
18th International Conference on Plasma-Facing Materials and Components for Fusion Applications, 17th - 21st May 2021

This contribution outlines a strategy for assessing tritium (T) inventory in plasma facing components (PFC) during JET T operations. It is based on retention as a fraction of fuel injected in-vessel, currently reported as 0.24% for 2011-2012 operating period, in conjunction with the planned T pulse schedule providing fueling of 4 g T injected per d…

Preprint Published
2021
UKAEA-CCFE-CP(21)10
28th IAEA Fusion Energy Conference, Nice, France, 10-15th May 2021

This paper shows experimental results from the TCV tokamak that indicate plasma-molecule interactions involving D+2 and possibly D− play an important role as sinks of energy (through hydrogenic radiation as well as dissociation) and particles during divertor detachment if low target temperatures (< 3 eV) are achieved. Bot…

Preprint Published
2021
UKAEA-CCFE-CP(21)09
28th IAEA Fusion Energy Conference, Nice, France, 10-15th May 2021

Understanding the effects of neutron irradiation of materials is one of the outstanding issues in the development of fusion technologies. The impact of this work derives from the opportunity, for the first time in a tokamak operating with a D-T plasma, to deliver experimental results which directly link to the nuclear characteristics of real sam…

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 14/10/2022
2021
UKAEA-CCFE-CP(21)08
28th IAEA Fusion Energy Conference, Nice, France, 10-15th May 2021

The pedestal plays an important role in determining the confinement in tokamak H-mode plasmas. However, the steep pressure gradients in this transport barrier also lead to edge localized modes (ELMs) [1]. There is good understanding of the pedestal in type I ELM regimes [2], however, type I ELMs are known to damage plasma facing components and f…

Preprint
2021
UKAEA-CCFE-CP(21)07
47th EPS Plasma Physics Virtual Conference, 21-25 June 2021

The disruption mitigation system at ITER will include four shattered pellet injectors (SPI), which will be dedicated to the mitigation of electro-magnetic loads (EML), thermal loads and the avoidance and suppression of runaway electrons. Recently the JETILW was equipped with an SPI with a wide capability. Specifically: pellet diameter d = [4.57, 8.…

Preprint
2018
UKAEA-CCFE-PR(18)26
30th Symposium on Fusion Technology (SOFT), Giardini Naxos, Messina, Sicily, 16-21 September 2018

Pre-conceptual design studies for a European Demonstration Fusion Power Plant (DEMO) have been in progress since 2014.  At this stage, while a range of design options are being considered, it is essential that assessments are carried out of the safety and environmental impact of these options.  This is not only to ensure that the DEMO plant is op…

Published
2021
UKAEA-CCFE-CP(21)06
24th International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI), South Korea, 24 - 29 January 2021

In this work we provide experimental insights into the impact of plasma-molecule interactions on divertor detachment by applying new spectroscopic analysis techniques to the hydrogen Balmer line series to investigate how both atom and plasma-molecule interactions impact particle balance. Our analysis on a representative L-mode TCV density ramp dis…

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 16/02/2023
2021
UKAEA-CCFE-CP(21)05
31st Symposium on Fusion Technology (SOFT), Dubrovnik, Croatia, 20 - 25 September 2020

Plasma Event TRiggering for Alarms (PETRA) is a flexible new system at JET for detecting plasma events to trigger exception handling responses. It provides a platform for all existing and new techniques which involve processing JET real-time data to identify when to change the trajectory of a plasma shot, and reduces the technical cost and risk in …

Preprint Purchase
2021
UKAEA-RACE-CP(21)04
14th International Symposium on Fusion Nuclear Technology (ISFNT-14) Budapest,Hungary, 22-27 September 2019

Just like most industrial or scientific installations, future fusion reactors will require more or less frequent maintenance. The expected environmental conditions, as well as the necessity of carrying out many maintenance tasks in parallel in result in remote robotic maintenance becoming a necessity in order to minimize the maintenance shutdown du…

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 25/11/2022
2021
UKAEA-RACE-CP(21)03
2021 IEEE International Conference on Robotics and Automation (ICRA),Xi’an China, 30 May - 5 June 2021

Driving energy consumption plays a major role in mobile robots navigating challenging environments, especially if they are left to operate unattended under limited on-board power. This paper reports on first results of an energy-aware path planner, which can provide estimates of the driving energy consumption and energy recovery of a robot traversi…

Preprint