Spectroscopy of Tokomak
g-ray Spectroscopy of Tokamak Plasmas.
Tech Area / Field
- FUS-PLA/Plasma Physics/Fusion
8 Project completed
Senior Project Manager
Karabashev S G
Russian Academy of Sciences / Physical Technical Institute, Russia, St Petersburg
- Kurchatov Research Center, Russia, Moscow\nVNIIEF, Russia, N. Novgorod reg., Sarov
- JAERI, Japan, Tokyo\nJoint European Torus (JET) / Joint Undertaking, UK, Abingdon\nENEA, Italy, Frascati\nForschungszentrum Jülich, Germany, Jülich
Project summaryAlpha-particle heating is a key part of any fusion design. The study of the physics of alpha particle heating is a prime goal of the next generation of fusion experiments. The basic aim of the project is the study of the behavior of fusion alpha particles in the DT-plasma by means gamma-ray spectroscopy.
Gamma-ray spectroscopy is a new diagnostic trend in the plasma physics. The method is based on the detection and analysis of high energy gamma rays resulting from fusion and nuclear reactions that take place with the background impurity and targets injected in the plasma.
The capabilities of new methods of fast ion diagnostics based on the nuclear reactions have been investigated. Particularly, the resonant capture reactions between confined protons/alphas and low-Z artificial impurities in the plasma have been examined. In this case, the intensity of the decay gamma rays is proportional to the particle concentration at resonance energy. Another method is based on Doppler shape analysis of the 4.44-MeV gamma-ray spectra from the 9Ве (a, ng) 12С reaction. In-beam study of this diagnostic reaction and estimates of the reaction rates and signal values in the tokamaks have been carried out.
The main branches of the proposed project:
- search and study of the diagnostic reactions using the Ioffe Cyclotron and Arzamas Tandem Generator;
- research and development of the new diagnostic methods based on the reactions; simulation of diagnostic gamma-ray spectra using experimental data base;
- performance of recommendations for application of the investigated reactions for plasma diagnostics at large tokamak;
- fabrication of gamma-diagnostic hardware;
- study of fast ion (and, if it would be possible, alpha-particle) behavior in tokamak plasma using gamma-ray spectroscopic methods.
Main results of the project:
- elaborated gamma-diagnostic technique for fast proton and alpha particles;
- experimental and evaluated data base for the diagnostics;
- gamma-ray diagnostic detectors;
- diagnostic data on slowing down of fast ions in tokamak plasmas;
- recommendations on the application of gamma-ray spectroscopy at large tokamaks and prototypic detectors for international fusion plasma activities.
Proposed project responds to the ISTC's objectives, inasmuch as provide weapons scientist and engineers, who possess knowledge and skills related to weapons of mass destruction, opportunities to redirect the talents to peaceful and long-term international activity - controlled fusion.
The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.
ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.