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1. Transport and stability studies on TFTR

Author

E. Nieschmidt, K. L. Wong, Cris W. Barnes, H. F. Dylla, R. J. Knize, D. Mueller, A. Miller, Hyeon K. Park, R. A. Hulse, Brentley Stratton, S. von Goeler, Gregory W. Hammett, G. Taylor, Neil Pomphrey, M. McCarthy, S. D. Scott, J.F. Schivell, R. J. Fonck, G. D. Tait, Hans-Stephan Bosch, S. J. Zweben, M. C. Zarnstorff, A. T. Ramsey, W. Stodiek, S. J. Kipatrick, N. R. Sauthoff, D. Dimock, V. Arunsalam, R. T. McCann, G. L. Schmidt, S. L. Davis, R. B. Howell, Robert James Goldston, A. Cavallo, M. G. Bell, R. Kaita, D. K. Owens, E.D. Fredrickson, J. Timberlake, J. Manickam, H. H. Towner, Robert Budny, J. Sinnis, J. E. Stevens, L. C. Johson, D. K. Mansfield, Manfred Bitter, K. P. Jaehnig, M. H. Redi, M. Ulrickson, D.L. Jassby, G. Greene, P. Colestock, H. W. Hendel, M. Williams, P. C. Efthimion, G. Schilling, R. M. Wieland, T. Saito, K. McGuire, H. Hsuan, S. Yoshikawa, F. C. Jobes, G. Kuo-Petravic, R. J. Hawryluk, S. S. Medley, N. Bretz, A.B. Ehrhardt, K. W. Hill, A. L. Roquemore, W. Morris, C. E. Bush, D. C. McCune, David W. Johnson, D. H. McNeill, Dale Meade, L. R. Grisham, Einar Hinnov, B. Grek, P. H. LaMarche, D. R. Mikkelsen, Dennis M. Manos, and K. M. Young

Subjects
Tokamak, Materials science, Atmospheric-pressure plasma, Plasma, Condensed Matter Physics, Thermal diffusivity, law.invention, Ion, Nuclear Energy and Engineering, law, Electron temperature, Neutron source, Atomic physics, Beam (structure)
Abstract

During the 1987 run, TFTR reached record values of QDD, neutron source strength, and Ti(0). Good confinement together with intense auxiliary heating has resulted in a plasma pressure greater than 3*105 Pascals on axis, which is at the ballooning stability boundary. At the same time improved diagnostics, especially ion temperature profile measurements, have led to increased understanding of tokamak confinement physics. Ion temperature profiles are much more peaked than previously thought, implying that ion thermal diffusivity, even in high ion temperature supershot plasmas, is greater than electron thermal diffusivity. Based on studies of the effect of beam orientation on plasma performance, one of the four neutral beamlines has been re-oriented from injecting co-parallel to counter parallel, which will increase the available balanced neutral injection power from 14 MW to 27 MW. With this increase in balanced beam power, and the addition of 7 MW of ICRF power it is planned to increase the present equivalant QDT of 0.25 to close to break-even conditions in the coming run.

Published
1988
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2. TFTR Initial operations

Author

D. Mikkelson, H. W. Hendel, H. F. Dylla, R.J. Hawryluk, D. McCune, P. C. Efthimion, Dale Meade, Robert James Goldston, Joseph L. Cecchi, E. Nieschmidt, J. Coonrod, M. Bell, D. Mueller, K. McGuire, R. B. Krawchuk, M. McCarthy, K.W. Hill, R. Little, G. D. Tait, J. Isaacson, Robert Kaita, L. C. Johnson, S. S. Medley, G. Taylor, L. Samuelson, D. J. Grove, N. L. Bretz, M. Ulrickson, J. Schivell, W. Blanchard, A. L. Roauemore, D.K. Owens, S. L. Davis, F. Tenney, Kenneth M. Young, J. A. Schmidt, S. Sesnic, R. J. Fonck, J. Sinnis, A. T. Ramsey, J. D. Strachan, and N. R. Sauthoff

Subjects
Physics, Hydrogen, Feedback control, chemistry.chemical_element, Plasma, Condensed Matter Physics, Nuclear physics, Nuclear Energy and Engineering, chemistry, Deuterium, Impurity, Atomic physics, Tokamak Fusion Test Reactor, Scaling, Current decay
Abstract

TSTR (Tokamak Fusion Test Reactor) has operated since December 1982 with ohmically heated plasmas. Routine operation with feedback control of plasma current, position and density has been obtained for plasmas with Ip800 kA, a = 68 cm, R = 250 cm, and Bt=27 kG. A maximum plasma current of 1 MA was achieved with q2.5. Energy confinement times of ~150 msec were measured for hydrogen and deuterium plasmas with e = 2 x 1013 cm-3, Te(0) 21.5 keV, Ti(0) = 1.5 keV and Zeff1 3. The preliminary results suqgest a size-cubed scaling from PLT, and are consistent with Alcator C scaling where T ~ nR2a. Initial measurements of plasma disruption characteristics indicate current decay rates of ~ 800 kA in 8 ms which is within the TFTR design requirement of 3 MA in 3 ms.

Published
1984
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3. Experimental results from the TFTR tokamak

Author

P. H. LaMarche, D. R. Mikkelsen, S. D. Scott, S. von Goeler, M. C. Zarnstorff, H.W. Kugel, Dennis M. Manos, C. H. Ma, D. L. Hillis, J. D. Bell, R. J. Hawryluk, S. S. Medley, F.P. Boody, N. Bretz, David W. Johnson, M. Shimada, R. Weiland, Robert Budny, Dale Meade, K. M. Young, G. L. Schmidt, S. Yoshikawa, Sydney Cohen, R. J. Colchin, R. Kaita, R. Groebner, M. McCarthy, H. W. Hendel, Einar Hinnov, S. L. Davis, J. Coonrod, M. H. Redi, L. C. Emerson, W. R. Blanchard, M. Ulrickson, E. Nieschmidt, R. Kamperschroer, B. Prichard, D. Dimock, S. L. Milora, J. B. Wilgen, George W. Taylor, H.P. Eubank, M. G. Bell, V. K. Pare, Hyeon K. Park, L. R. Grisham, A. C. England, J.F. Schivell, Robert James Goldston, J. E. Simpkins, D. Mueller, D. K. Mansfield, P. C. Efthimion, Joseph L. Cecchi, J. Sinnis, A. L. Roquemore, B. Grek, H. F. Dylla, David A Rasmussen, K. McGuire, R. T. McCann, W. Morris, C. E. Bush, R. Little, M. Williams, D. C. McCune, C. E. Thomas, L. C. Johnson, Brentley Stratton, D. K. Owens, J. D. Callen, H. H. Towner, H. Hsuan, K. W. Hill, E.D. Fredrickson, V. Arunasalam, S. Sesnic, K. L. Wong, F. Stauffer, R. A. Hulse, S.K. Combs, R. J. Fonck, S. Hiroe, Stanley Kaye, M. Murakami, G. D. Tait, S. J. Zweben, Manfred Bitter, A. T. Ramsey, N. R. Sauthoff, and S. J. Kilpatrick

Subjects
Nuclear physics, Tokamak, Materials science, Deuterium, law, Electric heating, Plasma, Atomic physics, Joule heating, Ohmic contact, Beam (structure), law.invention, Ion
Abstract

Recent experiments on TFTR have extended the operating regime of TFTR in both ohmic- and neutral-beam -heated discharges. The TFTR tokamak has reached its original machine-design specifications ( I p = 2.5 MA and B T = 5.2 T). Initial neutral-beam -heating experiments used up to 6.3 MW of deuterium beams. With the recent installation of two additional beamlines, the power has been increased up to 11 MW. A deuterium pellet injector was used to increase the central density to 2.5 x 10 20 m -3 in high-current discharges. At the opposite extreme, by operating at low plasm a current ( I p ~ 0.8 MA) and low density ( n e~ 1 x 10 19 m -3 ), high ion temperatures (9 + 2 keV) and rotation speeds (7 x 10 5 m s -1 ) have been achieved during injection. In addition, plasma-compression experiments have demonstrated acceleration of beam ions from 82 to 150 keV, in accord with expectations. The wide operating range of TFTR, together with an extensive set of diagnostics and a flexible control system, has facilitated transport and scaling studies of both ohmic- and neutral-beam -heated discharges. The result of these confinement studies are presented.

Published
1987
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4. Progress in the neutral beam injection heating experiment on the Tokamak fusion test reactor

Author

D. Dimock, Cris W. Barnes, P. H. LaMarche, D. R. Mikkelsen, R. J. Fonck, A. T. Ramsey, G. L. Schmidt, Dennis M. Manos, N. R. Sauthoff, M. McCarthy, Gregory W. Hammett, G. Schilling, J. D. Strachan, David W. Johnson, E. Nieschmidt, S. von Goeler, S. L. Davis, R. J. Knize, Hyeon K. Park, T. Stevenson, J. Sinnis, G. D. Tait, S. Yoshikawa, S. J. Zweben, K. P. Jaehnig, T. E. O’Connor, K. L. Wong, D. H. McNeill, R. Kaita, M. Williams, L. R. Grisham, F. C. Jobes, N. Bretz, R. A. Hulse, H. Hsuan, E.D. Fredrickson, M. H. Redi, G. Taylor, B. Grek, M. Ulrickson, R. J. Hawryluk, S. S. Medley, P. C. Efthimion, D. Mueller, V. Arunsalam, K. M. Young, Brentley Stratton, K. McGuire, R. B. Howell, Robert James Goldston, Neil Pomphrey, K. W. Hill, A. von Halle, H. F. Dylla, Manfred Bitter, R. Little, S. J. Kilpatrick, Hans-Stephan Bosch, L. C. Johnson, D. K. Owens, H. H. Towner, A. L. Roquemore, M. G. Bell, W. Morris, C. E. Bush, D. C. McCune, H. W. Hendel, J.F. Schivell, Dale Meade, Einar Hinnov, D.L. Jassby, D. K. Mansfield, R. M. Wieland, T. Saito, P. Colestock, S. D. Scott, M. C. Zarnstorff, J. Timberlake, and R. T. McCann

Subjects
Nuclear and High Energy Physics, Tokamak, Chemistry, Magnetic confinement fusion, Plasma, Neutral beam injection, law.invention, Ion, Nuclear physics, Heating system, Deuterium, law, Tokamak Fusion Test Reactor, Instrumentation
Abstract

The principal heating system for the Tokamak Fusion Test Reactor (TFTR) consists of four beamlines to inject beams of neutral deuterium into the tokamak plasma. We have recently injected beams at total powers up to about 30 MW, and we have achieved ion temperatures in the plasma core of 30 keV and more.

Published
1989
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5. Plasma-material interactions in TFTR

Author

P. C. Efthimion, Joseph L. Cecchi, R. Little, L. C. Johnson, G. L. Schmidt, Robert Budny, W. R. Wampler, E. Nieschmidt, P. H. LaMarche, D. R. Mikkelsen, E.D. Fredrickson, B. L. Doyle, S. J. Kilpatrick, H. F. Dylla, R. Groebner, A. C. England, M. Shimada, H. W. Hendel, F. Stauffer, B. Grek, K. W. Hill, Hyeon K. Park, Robert James Goldston, J. E. Simpkins, Team Tftr Team, Dennis M. Manos, M. H. Redi, S.K. Combs, C. E. Bush, A.E. Pontau, W. R. Blanchard, M. Ulrickson, S. Sesnic, D. K. Mansfield, David W. Johnson, M. G. Bell, D. Mueller, S. L. Davis, Dale Meade, K. Wilson, B. Prichard, K. M. Young, Brentley Stratton, S. L. Milora, G. Taylor, A. T. Ramsey, J.F. Schivell, D.B. Heifetz, K. L. Wong, N. Bretz, S. D. Scott, P. P. Boody, M. Williams, M. C. Zarnstorff, L. R. Grisham, H.P. Eubank, R. J. Fonck, O. K. Owens, R. A. Hulse, R. J. Hawryluk, S. S. Medley, M. Murakami, Samuel A. Cohen, S. Hiroe, S. von Goeler, G. D. Tait, J. Sinnis, and S. J. Zweben

Subjects
Nuclear and High Energy Physics, Materials science, chemistry.chemical_element, Plasma, Oxygen, Nuclear Energy and Engineering, chemistry, Sputtering, Getter, Impurity, Limiter, General Materials Science, Atomic physics, Carbon, Helium
Abstract

This paper presents a summary of plasma-material interactions which influence the operation of TFTR with high current (≤ 2.2 MA) ohmically heated, and high-power (∼ 10 MW) neutral-beam heated plasmas. The conditioning procedures which are applied routinely to the first-wall hardware are reviewed. Fueling characteristics during gas, pellet, and neutral-beam fueling are described. Recycling coefficients near unity are observed for most gas fueled discharges. Gas fueled discharges after helium discharge conditioning of the toroidal bumper limiter, and discharges fueled by neutral beams and pellets, show R

Published
1987
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6. Confinement Studies In TFTR

Author

Robert James Goldston, A. Wouters, D.J. Grove, J. Sinnis, J.D. Callen, V. Arunasalam, H.W. Hendel, J. Coonrod, F. J. Stauffer, M. Williams, S. Sesnic, R. Little, R. Kaita, A.C. England, L.C. Emerson, S. D. Scott, David A Rasmussen, H. F. Dylla, M. C. Zarnstorff, H.W. Kugel, L. C. Johnson, D. K. Owens, S. von Goeler, P. C. Efthimion, C.E. Thomas, Joseph L. Cecchi, R. M. Wieland, G. D. Tait, H. H. Towner, C. E. Bush, A. L. Roquemore, P. H. LaMarche, R. Hulse, Szymon Suckewer, D. R. Mikkelsen, A. T. Ramsey, K. McGuire, H. Yamada, D. Dimock, J.F. Schivell, Manfred Bitter, N. R. Sauthoff, Eric Fredrickson, E. Nieschmidt, M. Kikuchi, Hyeon K. Park, D. A. Boyd, Dennis M. Manos, M. Shimada, Stanley Kaye, C.H. Ma, D. K. Mansfield, P.H. Rutherford, D. C. McCune, David W. Johnson, B. Grek, D. Mueller, G. Taylor, J. H. Kamperschroer, S. J. Kilpatrick, K-L. Wong, B. Prichard, Dale Meade, N. Bretz, S. Yoshikawa, Harold P. Furth, H.P. Eubank, V.K. Pare, R. J. Fonck, Brentley Stratton, R. T. McCann, M. G. Bell, K. W. Hill, R.J. Colchin, W. R. Blanchard, M. Ulrickson, M. McCarthy, J. E. Simpkins, K. M. Young, F. Tenney, J.D. Bell, M. Murakami, L. R. Grisham, R. J. Hawryluk, S. S. Medley, F.P. Boody, J-L. Schwob, and S. L. Davis

Subjects
Physics, Scaling law, Plasma heating, 020209 energy, General Engineering, Plasma confinement, Ion temperature, 02 engineering and technology, 01 natural sciences, Neutral beam injection, 010305 fluids & plasmas, 0103 physical sciences, Stored energy, 0202 electrical engineering, electronic engineering, information engineering, Atomic physics
Abstract

The paper describes the present (end of February 1985) status of the plasma confinement studies in the TFTR tokamak with emphasis on those with neutral beam injection (NBI). Recent improvements in the device capabilities have substantially extended operating parameters: B /sub T/ increased to 4.0 T, I /sub p/ to 2.0 MA, injection power (P /sub b/ ) to /sup 5/ MW with H/sup 0/ or D/sup 0/ beams, n /sub e/ to 5 x 10/sup 19/ m/sup -3/ and Z /sub eff/ reduced to 1.4. With ohmic heating (OH) alone, the previously established scaling for gross energy confinement time (T /sub E/ /sup 0/ n /sub e/ q) has been confirmed at higher I /sub p/ and B /sub T/ , and the maximum T /sub E/ of 0.4 sec has been achieved. With NBI at P /sub b/ substantially (by factor > 2) higher than P /sub OH/ , excellent power and particle accountability have been established. This suggest that the less-than-expected increase in stored energy with NBI is not due to problems of power delivery, but due to problems of confinement deterioration. T /sub E/ is observed to scale approximately as I /sub p/ P /sub b/more » /sup 0.5/ (independent of n /sub e/ ), consistent with previous L-mode scalings. With NBI we have achieved the maximum T /sub E/ of 0.2 s and the maximum T /sub i/ (o) of 4.4 keV in the normal operating regime, and even higher T /sub i/ (o) in the energetic-ion regime with low-n /sub e/ and low I /sub p/ operation.« less

Published
1985
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7. Neutral beam injection on the Tokamak fusion test reactor

Author

M. Williams, M. G. Bell, K. Wilson, E. Nieschmidt, Robert Budny, S. D. Scott, K. M. Young, W. R. Wampler, G. L. Schmidt, G. Taylor, S. L. Milora, Hyeon K. Park, C. E. Bush, P. C. Efthimion, M. C. Zarnstorff, Joseph L. Cecchi, R. Groebner, K. W. Hill, J.F. Schivell, A. C. England, M. Shimada, J. Sinnis, S. von Goeler, H. W. Hendel, R. Little, David W. Johnson, B. Grek, S. J. Kilpatrick, D. K. Mansfield, L. C. Johnson, D. K. Owens, Dale Meade, R. J. Hawryluk, S. S. Medley, L. R. Grisham, P. H. LaMarche, F.P. Boody, Robert James Goldston, H.P. Eubank, D. R. Mikkelsen, D.B. Heifetz, N. Bretz, Dennis M. Manos, R. J. Fonck, A.E. Pontau, K. L. Wong, M. H. Redi, W. R. Blanchard, M. Ulrickson, S. L. Davis, R. A. Hulse, H. F. Dylla, S. Sesnic, D. Mueller, Brentley Stratton, E.D. Fredrickson, F. Stauffer, A. T. Ramsey, G. D. Tait, S. J. Zweben, and Samuel A. Cohen

Subjects
Nuclear and High Energy Physics, Chemistry, Neutron emission, Direct current, Plasma, Neutral beam injection, Ion, Bootstrap current, Nuclear physics, Physics::Accelerator Physics, Atomic physics, Tokamak Fusion Test Reactor, Instrumentation, Beam (structure)
Abstract

The neutral beam injection experiment on TFTR has now been underway for over two years, during which time we have injected as much as about 20 MW of beam power at energies up to 110 keV. We have obtained qualitative evidence of direct current drive by the injected beam ions. Recently we have produced plasmas in which the energy confinement time, βp, neutron emission, stored energy (both total and electron), and ion temperature exhibit a pronounced enhancement over previous behavior. Under these conditions we have obtained preliminary indications that significant bootstrap current is being driven. Operation will continue with new sources with which we should be able to increase the beam pulse length fourfold.

Published
1987
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8. Confinement of high-density pellet-fueled discharges in TFTR

Author

R. M. Wieland, M. C. Zarnstorff, M. G. Bell, Manfred Bitter, D. Mueller, G. L. Schmidt, K. W. Hill, W. W. Heidbrink, A. T. Ramsey, L. C. Johnson, R. J. Hawyrluk, E. Nieschmidt, David W. Johnson, E.D. Fredrickson, B. Grek, V. Arunasalam, G. Taylor, S. Sesnic, Hyeon K. Park, S. L. Milora, J. B. Wilgen, P. C. Efthimion, Dale Meade, B. L. Stratton, J.F. Schivell, S.K. Combs, A. C. England, H. W. Hendel, K. McGuire, Robert James Goldston, D. K. Mansfield, L. R. Grisham, C. E. Bush, D. C. McCune, P. H. LaMarche, R. Little, F. Stauffner, D. K. Owens, and H. H. Towner

Subjects
Materials science, Nuclear Energy and Engineering, Pellet, Limiter, Plasma confinement, High density, Graphite, Plasma, Penetration (firestop), Atomic physics, Condensed Matter Physics, Plasma current
Abstract

TFTR pellet injection results reported by Schmidt (1985) have been extended to higher density and n tau in plasmas limited by a graphite inner-wall belt limiter. Increased pellet penetration and larger density increases were achieved by operation at reduced plasma current (1.6 MA) and minor and major radius (70 cm and 235 cm). Under these conditions, beam heating results have been extended to 7 MW.

Published
1986
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9. TFTR confinement results

Author

P. C. Efthimion, R. J. Fonck, Joseph L. Cecchi, G. D. Tait, S. J. Zweben, S. D. Scott, E.D. Fredrickson, G. L. Schmidt, M. C. Zarnstorff, H.W. Kugel, S. Hiroe, V. Arunsalam, J. Sinnis, H. F. Dylla, Robert James Goldston, E. Nieschmidt, F. Stauffer, K. McGuire, David W. Johnson, S. L. Milora, N. Bretz, Stanley Kaye, S. Sesnic, R. M. Wieland, J. B. Wilgen, B. Grek, S. Yoshikawa, Hyeon K. Park, J. E. Simpkins, J.F. Schivell, Samuel Cohen, R. T. McCann, G. Taylor, D. Mueller, K. L. Wong, Dale Meade, R. J. Hawryluk, M. McCarthy, S. L. Davis, S. S. Medley, Einar Hinnov, R. Little, A. T. Ramsey, J. Coonrod, F.P. Boody, K. M. Young, A. C. England, Brentley Stratton, N. R. Sauthoff, R. A. Hulse, L. C. Johnson, Manfred Bitter, D. K. Owens, D. K. Mansfield, A. L. Roquemore, H.P. Eubank, M. H. Redi, M. Shimada, H. H. Towner, S.K. Combs, W. R. Blanchard, M. Ulrickson, P. H. LaMarche, D. R. Mikkelsen, W. Morris, C. E. Bush, D. C. McCune, L. R. Grisham, M. Williams, B. Prichard, S. J. Kilpatrick, Dennis M. Manos, D. Dimock, R. Kaita, J. D. Callen, H. Hsuan, S. von Goeler, W. W. Heidbrink, R. J. Colchin, H. W. Hendel, R. Kamperschroer, M. G. Bell, V. K. Pare, K. W. Hill, and Robert Budny

Subjects
Range (particle radiation), Materials science, Toroid, Pellets, Plasma, Condensed Matter Physics, Acceleration voltage, Neutral beam injection, Nuclear Energy and Engineering, Physics::Plasma Physics, Physics::Space Physics, Limiter, Atomic physics, Beam (structure)
Abstract

The characteristics of plasma operation on the axisymmetric inner toroidal limiter in TFTR are described. After conditioning, plasmas with low metal content and low zeff are obtained with this limiter. There is no substantial increase in zeff with total input power during neutral beam injection. Compared to operation on the outer blade limiter, additional gas is required to fuel plasmas on the inner limiter. Injection of D pellets increased the plasma density substantially and produced energy confinement times up to 0.5 s in ohmically heated plasmas. The four neutral beam lines have injected up to 13.5 MW total power into the plasma for 0.5 s with up to 90 kV accelerating voltage. The scaling of the plasma stored energy was studied as a function of the input power, plasma current and plasma density. In the range 1.4 to 2.2 MA, the overall and incremental confinement times for both the total and thermal stored energies increase with plasma current at fixed density. There appears to be a weak negative scaling of the total stored energy with density at high injection power.

Published
1986
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10. Initial limiter and getter operation in TFTR

Author

E. Nieschmidt, J. Isaacson, George W. Taylor, R. J. Knize, D.J. Grove, J. Timberlake, C. E. Thomas, David W. Johnson, D. McCarthy, R. Hulse, J. D. Strachan, R. J. Hawryluk, Dale Meade, S. D. Scott, S. S. Medley, Manfred Bitter, R. Kaita, Stanley Kaye, D. R. Mikkelsen, S. J. Kilpatrick, J. Sinnis, W. R. Blanchard, M. Ulrickson, K. W. Hill, F. Tenney, Dennis M. Manos, P. C. Efthimion, J. Sredniawski, Joseph L. Cecchi, A. T. Ramsey, M. Murakami, S. L. Davis, N. R. Sauthoff, K. M. Young, N. Bretz, D. Dimock, J. Coonrod, K. McGuire, B. L. Doyle, A. L. Roquemore, D. Mueller, B. Grek, C. E. Bush, D. C. McCune, H. F. Dylla, S. von Goeler, J.F. Schivell, D. Heifetz, P. Stangeby, Samuel A. Cohen, Robert James Goldston, H. W. Hendel, M. G. Bell, R. Little, R. J. Fonck, L. C. Johnson, D. K. Owens, S. Sesnic, J. Kiraly, G. D. Tait, and H. H. Towner

Subjects
Nuclear and High Energy Physics, Materials science, Plasma heating, Nuclear engineering, Zirconium alloy, Alloy, Plasma, engineering.material, Nuclear Energy and Engineering, Getter, Limiter, Electric heating, engineering, General Materials Science, Joule heating
Abstract

During the recent ohmic heating experiments on TFTR, the movable limiter array, preliminary inner bumper limiter, and prototype ZrAl alloy bulk getter surface pumping system were brought into operation. This paper summarizes the operational experience and plasma characteristics obtained with these components. The near-term upgrades of these systems are also discussed.

Published
1984
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11. Production of 14 MeV neutrons from D-D neutron generators

Author

E. Nieschmidt and F.E. Cecil

Subjects
Physics, Nuclear and High Energy Physics, Neutron emission, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Fast fission, Neutron temperature, Nuclear physics, Neutron generator, Neutron cross section, Physics::Accelerator Physics, Neutron source, Neutron, Nuclear Experiment, Instrumentation, Neutron moderator
Abstract

The production of 14 MeV neutrons from a D-D neutron generator resulting from tritium buildup from the d(d, p)t reaction in the target is discussed. The effect of the 14 MeV neutrons on fast neutron activation analysis with D-D neutron generators is evaluated.

Published
1986
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13. Acceleration of beam ions during major-radius compression in the tokamak fusion test reactor

Author

J. H. Kamperschroer, P. C. Efthimion, A. T. Ramsey, S. Sesnic, K. McGuire, Eric Fredrickson, M. Williams, V. K. Pare, Gregory W. Hammett, K. L. Wong, R. Kaita, A. C. England, Harold P. Furth, J. D. Strachan, M. G. Bell, S. D. Scott, Robert James Goldston, D. K. Mansfield, M. C. Zarnstorff, H.W. Kugel, Robert Budny, Manfred Bitter, W. W. Heidbrink, G. Taylor, E. Nieschmidt, G. D. Tait, H. W. Hendel, D. K. Owens, K. W. Hill, David W. Johnson, A. L. Roquemore, B. Grek, Hyeon K. Park, H.P. Eubank, D. Mueller, David A Rasmussen, C. Ma, C. E. Bush, D. C. McCune, R. J. Hawryluk, S. S. Medley, Dennis M. Manos, L. R. Grisham, J. Coonrod, Amos Chan, and J.F. Schivell

Subjects
Physics, Tokamak, Ion beam, General Physics and Astronomy, Magnetic confinement fusion, Plasma, Fusion power, law.invention, Particle acceleration, Physics::Plasma Physics, law, Atomic physics, Tokamak Fusion Test Reactor, Beam (structure)
Abstract

Tangentially coinjected deuterium beam ions were accelerated from 82 up to 150 keV during a major-radius compression experiment in the tokamak fusion test reactor. The ion energy spectra and the variation in fusion yield were in good agreement with Fokker-Planck code simulations. In addition, the plasma rotation velocity was observed to rise during compression.

Published
1985
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14. Acceleration of beam ions during major-radius compression in the tokamak fusion test reactor.

Author

Wong KL, Bitter M, Hammett GW, Heidbrink W, Hendel H, Kaita R, Scott S, Strachan JD, Tait G, Bell MG, Budny R, Bush C, Chan A, Coonrod J, Efthimion PC, England AC, Eubank HP, Fredrickson E, Furth HP, Goldston RJ, Grek B, Grisham L, Hawryluk RJ, Hill KW, Johnson D, Kamperschroer J, Kugel H, Ma C, Mansfield D, Manos D, McCune DC, McGuire K, Medley SS, Mueller D, Nieschmidt E, Owens DK, Paré VK, Park H, Ramsey A, Rasmussen D, Roquemore AL, Schivell J, Sesnic S, Taylor G, Williams MD, and Zarnstorff MC

Published
1985
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