Beam and viewing dump positioning inside TFTR for CTS alpha-particle diagnostics

Technical Report · Mon Jul 15 04:00:00 EDT 1991

DOI:https://doi.org/10.2172/5003474· OSTI ID:5003474

Rhee, D Y; Woskov, P P ^[1]; Ellis, R; Park, H ^[2]

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1. Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center
2. Princeton Univ., NJ (United States). Plasma Physics Lab.

A collective Thomson scattering (CTS) diagnostic system for localized measurement of energetic ions is being developed for TFTR. This system will use a 200KW, 56GHz gyrotron and a sensitive heterodyne receiver. In addition, a key element of this system will be beam and viewing dumps which are needed to minimize detection of stray gyrotron and ECE background radiation by the receiver system. It is the purpose of this study to determine the size and location of these dumps inside TFTR taking into account beam refraction and launch and receiver antenna optics scanning. The beam dump must cover all the area in the vacuum chamber where the beam is expected to impinge, and the viewing dump must cover all the areas within the direct line of sight of the receiver antenna. The beam launch system and the receiver antenna are to be placed nearly symmetrically above and below the midplane of the tokamak vacuum vessel, respectively. The beam dump is to be placed at the bottom inside of the vacuum vessel to absorb the gyrotron beam which will be launched from a top port. The viewing dump is expected to be placed symmetrically at the top inside of the vacuum vessel, and therefore a detailed analysis of only the beam dump is required here. 5 refs., 7 figs., 1 tab.

• Research Organization: Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-91ER54109
• OSTI ID: 5003474
• Report Number(s): DOE/ER/54109-T2; PFC/RR--91-12; ON: DE92002784
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ALPHA PARTICLES
BEAM DUMPS
BEAM POSITION
CHARGED PARTICLES
CLOSED PLASMA DEVICES
DOCUMENT TYPES
PLASMA DIAGNOSTICS
PROGRESS REPORT
TFTR TOKAMAK
THERMONUCLEAR DEVICES
TOKAMAK DEVICES