Neutron flux measurements around PLT

Zankl, G.; Strachan, J.D.; Lewis, Robert H.; Pettus, W.G.; Schmotzer, J.K.

doi:10.2172/5092223

Cited by 3 publications

(7 citation statements)

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“…The enhanced outward d-t flux indicates that the d-t emission profile was shifted outwards with respect to the vessel centre (R= 135 cm), consistent with the d-t centre being at R= 146 ± 10 cm. In a similar experiment using indium foils, the d-d emission centre was 142 ± 4 cm [9], consistent with an outward Shafranov shift of the plasma centre. The outward shift of the d-t centre indicates that the confined tritons include co-going ions since entirely countergoing ions would feature an inward shift.…”

Section: Triton Burn-up Datasupporting

confidence: 66%

“…18). The up-down symmetry of the d-t emission confirms that the d-t reactions occurred within the plasma since, if the reactions had [9], occurred from unconfined tritons encountering deuterium in the wall, the emission would be strongly peaked toward the bottom of the plasma. The enhanced outward d-t flux indicates that the d-t emission profile was shifted outwards with respect to the vessel centre (R= 135 cm), consistent with the d-t centre being at R= 146 ± 10 cm.…”

Section: Triton Burn-up Datamentioning

confidence: 69%

“…The d-d neutron emission was measured with indium activation samples [9] to about 30% accuracy. The d-t neutrons were selectively detected with a sample (aluminium) for which the neutron activation threshold is greater than 2.5 MeV and for which the final (radioactive) product of the reaction cannot be produced by other neutron or hard X-ray reactions in the sample material.…”

Section: Mevtritonsmentioning

confidence: 99%

“…The absence of time resolution prevents us from assessing the influence of single shot variations in triton confinement and burn-up. 3 He ionization chamber [9]. Counts below the peak centred at 2.5 MeV are generated by scattered neutrons.…”

Section: Mevtritonsmentioning

confidence: 99%

“…The 2.5 MeV neutron emission level was monitored by placing an indium activation foil [9] at the same location as the aluminium sample. The two threshold reactions have about the same energy dependence with respect to the two neutron emissions so that the scattered neutrons of degraded energy are roughly of equal importance in each activation sample (Fig.7).…”

Section: Fig 7 (A) Cross-section For the 21 Al(n A) Reaction Togementioning

confidence: 99%

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Burn-up of fusion-produced tritons and³He ions in PLT and PDX

Heidbrink¹,

Chrien²,

Strachan³

1983

Nucl. Fusion

Self Cite

116

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He ion 'burn-up' was measured on the PLT and PDX tokamaks by detection of the 14 MeV neutron and 15 MeV proton emission. In discharges with B,j>> 2 T, the measured ^e and triton burn-up is consistent (within a factor of three) with predictions based on classical theories of ion confinement and slowing down. In discharges with weaker toroidal fields but constant plasma current, the burn-up of both ions fell by more than a factor of ten so that the observed burn-up was significantly less than expected classically.

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Section: Triton Burn-up Datasupporting

confidence: 66%

Section: Triton Burn-up Datamentioning

confidence: 69%

Section: Mevtritonsmentioning

confidence: 99%

Section: Mevtritonsmentioning

confidence: 99%

Section: Fig 7 (A) Cross-section For the 21 Al(n A) Reaction Togementioning

confidence: 99%

See 3 more Smart Citations

Burn-up of fusion-produced tritons and³He ions in PLT and PDX

Heidbrink¹,

Chrien²,

Strachan³

1983

Nucl. Fusion

Self Cite

116

View full text Add to dashboard Cite

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Observation of d(d,p)t Reactions in the Princeton Large Torus

1983

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Protons from d(d,p) t fusion reactions have been observed in the Princeton Large Torus (PLT) using a surface-barrier detector. The time evolution of the escaping protons agreed with the d-d neutron evolution. The proton energy spectrum was measured during Ohmic, lower-hybrid and ICRF heating. The proton spectrum during lower-hybrid heating indicates non-thermal enhancement of the d-d fusion rate, in agreement with charge-exchange data.

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Charge-exchange and fusion reaction measurements during compression experiments with neutral beam heating in the Tokamak Fusion Test Reactor

Kaita¹,

Heidbrink²,

Hammett³

et al. 1986

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ABSTRACT. Adiabatic toroidal compression experiments were performed in conjunction with high power neutral beam injection in the Tokamak Fusion Test Reactor (TFTR). Acceleration of beam ions to energies nearly twice the injection energy was measured with a charge exchange neutral particle analyser. Measurements were also made of 2.5 MeV neutrons and 15 MeV protons produced in fusion reactions between the deuterium beam ions and the thermal deuterium and 3 He ions, respectively. When the plasma was compressed, the d (d,n) 3 He fusion reaction rate increased by a factor of five, and the 3 He(d,p)a rate by a factor of twenty. These data were simulated with a bounce averaged Fokker-Planck program, which assumed conservation of angular momentum and magnetic moment during compression. The results indicate that the beam ion acceleration was consistent with adiabatic scaling.

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Neutron flux measurements around PLT

Cited by 3 publications

References 0 publications

Burn-up of fusion-produced tritons and³He ions in PLT and PDX

Burn-up of fusion-produced tritons and³He ions in PLT and PDX

Observation of d(d,p)t Reactions in the Princeton Large Torus

Charge-exchange and fusion reaction measurements during compression experiments with neutral beam heating in the Tokamak Fusion Test Reactor

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Neutron flux measurements around PLT

Cited by 3 publications

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Burn-up of fusion-produced tritons and3He ions in PLT and PDX

Burn-up of fusion-produced tritons and3He ions in PLT and PDX

Observation of d(d,p)t Reactions in the Princeton Large Torus

Charge-exchange and fusion reaction measurements during compression experiments with neutral beam heating in the Tokamak Fusion Test Reactor

Contact Info

Product

Resources

About

Burn-up of fusion-produced tritons and³He ions in PLT and PDX

Burn-up of fusion-produced tritons and³He ions in PLT and PDX