System level design of the ITER bolometer port plug cameras

Area of Science:

• Fusion energy research
• Plasma diagnostics
• Optical engineering

Background:

• The International Thermonuclear Experimental Reactor (ITER) requires a comprehensive bolometer diagnostic system to measure plasma radiation.
• A significant portion of the diagnostic channels will be delivered by cameras installed in various ports.

Purpose of the Study:

• To present the system-level design status of the ITER port bolometer cameras.
• To outline solutions for integrating essential camera components within strict spatial limitations.
• To compare different remote handling maintenance strategies for hot cell operations.

Main Methods:

• Detailed design of sensor holders, support structures, and apertures (pinhole/collimator).
• Integration of cable connectors, ceramic track plates, and mineral-insulated cables.
• Development of internal electrical interfaces and external mechanical mountings.
• Assembly process demonstration using an example of an upper port camera with 60 lines of sight.

Main Results:

• Successful integration of diverse camera components within a restricted space envelope.
• Functional design of internal electrical interfaces and external mechanical mountings.
• Comparison of two distinct architectural options for remote handling maintenance in the hot cell.

Conclusions:

• The port camera system design addresses the complex integration challenges for the ITER bolometer diagnostic.
• Proposed solutions ensure the functionality and maintainability of the diagnostic system.
• The design facilitates efficient remote handling operations crucial for the ITER maintenance scheme.