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Showing 1 to 20 of 29 for “"neutral beam"”.
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Modelling the neutralisation process in neutral beam injectors
High power neutral beams currently play an important role in heating, fuelling and diagnosing magnetically confined thermonuclear fusion plasmas. At the Joint European Torus (JET) in Oxfordshire, England, the formation of such a beam involves passing a positive ion beam through a neutral gas target …
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Tritium Inventory in the Neutral Beam Box of TFTR
Made available in DSpace on 2017-07-06T18:48:59Z (GMT). No. of bitstreams: 3 Kelly_James_P_MS.pdf: 46135971 bytes, checksum: 486626d2ffde3d72952df736e73dfad1 (MD5) Kelly_James_P_MS_ABS.pdf: 600494 bytes, checksum: 496ef90024c559288dcf8f2a5af7f20b (MD5) license.txt: 4813 bytes, checksum: …
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Neutral Beam Fueling Requirements for a Steady-State Field-Reversed Mirror
Made available in DSpace on 2017-07-06T18:48:13Z (GMT). No. of bitstreams: 3 Gibson_Donald_R_Jr_MS.pdf: 32644743 bytes, checksum: 8474bd6965c18d605e611cb9fe5e2a6e (MD5) Gibson_Donald_R_Jr_MS_ABS.pdf: 486821 bytes, checksum: 264b24043a3df056c722f0d546dbd413 (MD5) license.txt: 4813 bytes, checksum: …
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Monte Carlo Simulation of Neutral-Beam Injection for Mirror Fusion Reactors
Made available in DSpace on 2014-12-14T06:26:09Z (GMT). No. of bitstreams: 1 8004231.pdf: 4748768 bytes, checksum: ba96354193999c0b0cacfee641c5435e (MD5) Previous issue date: 1979
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A study of Zweig's rule using phi mesons in a broad band neutral beam
… rule using phi mesons in a high energy photon beam has been performed. Measurement of the ratio sigma (gamma A -> phi pi pi A) / sigma (gamma A -> omega pi pi A) = 0.10 ± 0.02 is taken as evidence that there is not as strong suppression as could be expected. Other ratios show strange particle …
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A study of prompt fast ion losses from neutral beam injection in the DIII-D tokamak
A study of the prompt losses of injected neutral beam born fast ions was conducted on the DIII-D tokamak at General Atomics using scintillator based fast ion loss detectors (FILD) and a reverse orbit calculation code. Prompt losses, also called first orbit losses, result from injected neutrals that …
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Production of Positive Kaon Negative Kaon and Ppbar Pairs in High Energy Photoproduction (phi-Prime)
Using the Fermilab broad-band neutral beam and a multi-particle spectrometer, we have investigated the channels: (UNFORMATTED TABLE FOLLOWS)
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Electron Currents in Field Reversed Mirror Dynamics--Theory and Hybrid Simulation
… operation of the FRM as well as its start-up by neutral-beam injection. However, the fluid approximation is invalid near a field null. We have developed a detailed non-fluid model for the bulk dynamics of the electrons in this region. The region is treated as unmagnetized; electrons are …
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Current profile measurements using MSE on Alcator C-Mod
… Balmer-alpha decay emission from an energetic neutral beam injected into a magnetically confined plasma. This dissertation consists of three parts: (1) the current status of the C-Mod MSE diagnostic which includes major upgrades in the hardware and calibration techniques; (2) the elimination of …
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Dimuon production by high energy neutrons
In the broad band neutral beam at Fermi National Accelerator Laboratory, the dimuon production by high energy neutrons has been measured for incident neutron energies of approximately 250 and 320 GeV. The mass spectra show clear peaks in the rho-omega mass region and at the J /psi mass. Cross …
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Search for semileptonic decays of photoproduced charmed mesons
In the broad band neutral beam at Fermi1ab, a search for photoproduction of charmed D mesons has been done using photons of 100 to 300 GeV. The reaction considered was [equation] s No statistically significant evidence for D production is observed based on the Ksnpi± mass spectrum. The sensitivity …
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Generation and Characterization of Energetic Neutral Beams for Surface Modification
… research is to explore ways in which energetic neutral beams can be generated and characterized for modifying polymer substrates in a charge-less etching environment, without profile distortion.<br></br><br></br>A modified inductively coupled plasma source was constructed to characterize …
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Exclusive diffractive dissociation of KL mesons at high energies
… hadronic component of the Fennilab broad band neutral beam, we have observed diffractive dissociation of KL mesons with a carbon target into the exclusive final states Ks pi+pi-, K*(890)+-pi+, Ks Ksw and Kstheta , but not Ks ""t"" The diffractive production cross section for these states is not …
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Exclusive Diffractive Dissociation of K(l) Mesons at High Energies
… hadronic component of the Fermilab broad band neutral beam, we have observed diffractive dissociation of K(,L) mesons with a carbon target into the exclusive final states Ks (pi)('+)(pi)('-), K*(890)('(+OR-)) (pi)('(-OR+)), Ks (rho)('0), Ks (omega)('0), and Ks (phi), but not Ks (psi). The …
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Production of K+K - and ppbar pairs in high energy photoproduction
Using the Fermilab broad-band neutral beam and a multi-particle spectrometer, we have investigated the channels: photon + d ==> K+K- over ppbar (n, p, d, or X) ppbar In K+K-production, we make precise measurements of the elastic phi photoproduction cross section between 35 GeV and 85 GeV. Between …
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High energy photoproduction of rho and phi vector mesons
… mesons from hydrogen in the Fermilab broad band neutral beam. Forward going two particle final states were detected in a multiparticle spectrometer consistIng of two analyzing magnets, a multiwire-proportional-chamber tracking system and a particle identification system. Recoil protons and target …
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Enabling Validation of a CubeSat Compatible Wind Sensor
… space science instrument that measures neutral wind characteristics in the upper atmosphere. Neutral gas interactions with plasma in the ionosphere/thermosphere are responsible for spacecraft drag, radio frequency disturbances such as scintillation, and other geophysical phenomena. REDD …
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Negative ion charge transfer of the reaction of S⁻ and O⁻ with atomic hydrogen producing H⁻ ions from 1500 to 10 kev
… with some success.</p> <p>A crossed beam technique was used to perform these measurements. The ion beam was produced by a conventional hot anode arc discharge. The neutral beam was produced by a joule heated tungsten oven. Counting techniques were used in the data collection" -- …
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The Motional Stark Effect diagnostic on Alcator C-Mod
… from a radially injected hydrogen Diagnostic Neutral Beam (50 keV, 5 A, 50 ms). The Lorentz electric field (EL = v ) and the magnetic field cause the nominally fully degenerate Balmer-[alpha] to split into a partially degenerate multiplet whose components are polarized relative to the local …
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Rotation studies in fusion plasmas via imaging X-ray crystal spectroscopy
… and measuring plasma rotation involves neutral beam injection (NBI). In the large, high density plasmas envisaged for next generation reactors, such as ITER, NBI will be considerably more difficult than in current experiments. As a result, there is a need to identify alternative methods …
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