D- sup 3 He fusion in the joint European torus tokamak; Recent experimental results

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Fusion Technology; (United States)

OSTI ID:7233843

Jacquinot, J; Sadler, G J ^[1]

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1. JET Joint Undertaking, Abingdon (United Kingdom)

This paper discusses a new series of D-{sup 3}He fusion yield experiments performed in the Joint European Torus (JET) using ion cyclotron resonance heating (ICRH) to generate a high-energy {sup 3}He tail reacting with a background deuterium plasma. Using recently installed antennas with beryllium screens, radio-frequency power reaching 15 MW can be coupled to the plasma at the fundamental cyclotron resonance of {sup 3}He near the magnetic axis. Best results are obtained with 3.5-MA discharges in the double-null configuration with high recycling on the outboard limiters to stay in L mode and to control the plasma density and purity. A record fusion power level of P{sub fus} = 140 kW is obtained, corresponding to a reaction rate of 4.6 {times} 10{sup 16} reaction/s. The amplification factor Q = P{sub fus}/P{sub ICRH} reaches a maximum of 1.25% at P{sub ICRH} = 10 MW. The previous best results were P{sub fus} = 100 kW and Q = 1%. Time-resolved measurements show a correlation between fusion power and energy stored in the fast {sup 3}He ions in agreement with calculations based on classical slowing down of the {sup 3}He ions driven by ICRH to an average energy in the mega-electron-volt range.

• OSTI ID: 7233843
• Journal Information: Fusion Technology; (United States), Journal Name: Fusion Technology; (United States) Vol. 21:4; ISSN 0748-1896; ISSN FUSTE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350 -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
700410* -- Specific Fusion Devices & Experiments-- (1992-)
ALKALINE EARTH METALS
ANTENNAS
BERYLLIUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CLOSED PLASMA DEVICES
CONTROL
DATA
DEUTERIUM
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
HEATING
HELIUM 3
HELIUM ISOTOPES
HIGH-FREQUENCY HEATING
HYDROGEN ISOTOPES
ICR HEATING
IMPURITIES
INFORMATION
ISOTOPES
JET TOKAMAK
LIGHT NUCLEI
LIMITERS
METALS
NUCLEAR REACTIONS
NUCLEI
NUCLEOSYNTHESIS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA HEATING
POWER
PRODUCTION
RADIOISOTOPES
RECYCLING
RESOLUTION
STABLE ISOTOPES
SYNTHESIS
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTIONS
TIME RESOLUTION
TIMING PROPERTIES
TOKAMAK DEVICES
TRITIUM
YEARS LIVING RADIOISOTOPES
YIELDS