Neutral beam injector research and development work in the USA Page: 2 of 8
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We describe neutral beam injector research and development at the
Brookhaven National Laboratory, Lawrence Berkeley and Lawrence Livermore
Laboratories, and Oak Ridge National Laboratory.
All neutral beam systems for present and near-term applications are
based on the acceleration and neutralization of positive ions. The research
and development is carried out at LBL/LLL and ORNL. Present emphasis at
LBL/LLL is on 80 to 120 kV systems for the mirror program and for the TFTR
and D III tokamaks. Present emphasis at ORNL is on 40 to 80 kV systems for
the PLT, ISX, and PDX, and 80 to 200 kV systems for LITT and TNS tokamaks.
Injectors for the future experiments and reactors may operate at ener-
gies of 200 keV or higher, especially for mirror machine applications,
where positive-ion-based efficiencies will be very low, assuming no energy
recovery. Research on negative-ion-based systems with potentially high
efficiencies is carried out at BNL and at LBL/LLL and ORNL. The first dem-
onstration of a high-power neutral beam based on negative ions is planned
The US neutral beam :.njector research and development work is carried
out primarily at Department of Energy (DOE) Laboratories: The Brookhaven
National Laboratory (BNL) The Lawrence Berkeley and Livermore Laboratories
(LBL/LLL), and The Oak Ridge National Laboratory (ORNL).
High-power neutral beam systems based on pc tive-ion acceleration
and neutralization have produced effective heating in recent confinement
experiments [1, 2, 3]. For near-term applications, multi-megawatt neutral
beam systems with particle energies uptol20 keV are in the testing phase.
Systems using negative ions, for increased efficiency at high energies,
are in the research phase, but are receiving increasing emphasis for appli-
cations in the mid-1980's. The development of suitable test facilities
has been the pacing item in our program; four test stands with multi-megawatt
capabilities at voltages above 100 kV are in operation or nearing completion.
2. NEUTRAL BEAM INJECTORS BARD ON POSITIVE IONS
2.1 TBL/LLL Neutr'l Seam Work
The Lawrence Laboratories Neutral-Beam Development Group's positive-
ion-based work  proceeds along two lines: The first is required for
the neat-term applications: The presently identified applications, 2XIIB,
TMX, MFTF, TFTR, and D III, require injection at energies up to 120 keV,
ion currents per module up to 80 A, and pulse lengths to 0.5 sec. We
have achieved 120 kV, 0.5 sec operation of a fractional-area (14 A) TFTR
prototype source, and have tested a full-size TFTR source to 120 kV and
65 A for 20 ms. Half-second testing of the full-size TFTR source will be-
gin in August 1978, when the High Voltage Test Stand (HVTS) is fully op-
erational (section 4.4).
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Pyle, R.V.; Baker, W.R. & Barr, W.L. Neutral beam injector research and development work in the USA, article, July 1, 1978; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc1182193/m1/2/: accessed April 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.