A coherent FM laser radar based system for remote metrology in ITER
- Oak Ridge National Lab., TN (United States). Robotics and Process Systems Div.
- Coleman Research Corp., Springfield, VA (United States)
The plasma facing surfaces in ITER must be aligned to millimeter accuracy with respect to the magnetic flux surfaces to prevent impurity influx into the plasma and to avoid component damage. Checking of in-vessel component alignment during initial assembly, operation, and subsequent maintenance is anticipated. A fully remote metrology system is necessary, particularly since major remote operations such as shield blanket exchange and divertor cassette replacement are planned. The metrology system must be compatible with the ITER in-vessel environment of high gamma radiation, super-clean ultra-high-vacuum, and elevated temperature. A fast scanning rate is required since the plasma facing surface in ITER is very large. A coherent FM laser radar based metrology system, developed by Coleman Research Corporation, is being adopted to accomplish this task. Conceptually, this metrology system consists of a compact remotely deployed laser transceiver optics module, linked through fiber optics to the laser source and imaging units that are located outside the biological shield. Range measurements conducted on a variety of surfaces using the system have yielded sub-millimeter accuracy. Therefore, the technique will easily meet the precision requirement for the ITER application. Computer simulations have been carried out to determine the optimum number of units required for complete mapping of the plasma facing surfaces.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 505854
- Report Number(s):
- CONF-950905-; ISBN 0-7803-2970-8; TRN: 97:013547
- Resource Relation:
- Conference: 16. IEEE/NPSS symposium on fusion engineering, Champaign, IL (United States), 1-5 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 IEEE 16. symposium on fusion engineering. Volume 1; Miley, G.H.; Elliott, C. [eds.] [Univ. of Illinois, Urbana, IL (United States). Fusion Studies Lab.]; PB: 886 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Metrology/viewing system for next generation fusion reactors
A Remotely Deployed Laser System for Viewing/Metrology