Search Results - "Mikkelsen, D. R."

Electromagnetic transport from microtearing mode turbulence by Guttenfelder, W, Candy, J, Kaye, S M, Nevins, W M, Wang, E, Bell, R E, Hammett, G W, LeBlanc, B P, Mikkelsen, D R, Yuh, H

“…This Letter presents nonlinear gyrokinetic simulations of microtearing mode turbulence. The simulations include collisional and electromagnetic effects and use…”
Get full text

Dimits shift in realistic gyrokinetic plasma-turbulence simulations by Mikkelsen, D R, Dorland, W

“…In simulations of turbulent plasma transport due to long wavelength (k perpendicular rhoi < or = 1) electrostatic drift-type instabilities, we find a…”
Get full text

Suppression of electron temperature gradient turbulence via negative magnetic shear in NSTX by Yuh, H Y, Kaye, S M, Levinton, F M, Mazzucato, E, Mikkelsen, D R, Smith, D R, Bell, R E, Hosea, J C, LeBlanc, B P, Peterson, J L, Park, H K, Lee, W

“…Negative magnetic shear is found to suppress electron turbulence and improve electron thermal transport for plasmas in the National Spherical Torus Experiment…”
Get full text

Microtearing instabilities and electron transport in the NSTX spherical tokamak by Wong, K L, Kaye, S, Mikkelsen, D R, Krommes, J A, Hill, K, Bell, R, Leblanc, B

“…We report a successful quantitative account of the experimentally determined electron thermal conductivity chi(e) in a beam-heated H mode plasma by the…”
Get full text

Comparing linear ion-temperature-gradient-driven mode stability of the National Compact Stellarator Experiment and a shaped tokamak by Baumgaertel, J. A, Hammett, G. W, Mikkelsen, D. R

“…Phys. Plasmas 20, 022305 (2013) One metric for comparing confinement properties of different magnetic fusion energy configurations is the linear critical…”
Get full text

Continuous tokamak operation with an internal transformer by SINGER, C. E, MIKKELSEN, D. R

“…A large improvement in efficiency of current drive in a tokamak can be obtained using neutral beam injection to drive the current in a plasma which has low…”
Get full text

Gyrokinetic studies of the effect of beta on drift-wave stability in NCSX by Baumgaertel, J. A, Hammett, G. W, Mikkelsen, D. R, Nunami, M, Xanthopoulos, P

“…Phys. Plasmas 19, 122306 (2012) The gyrokinetic turbulence code GS2 was used to investigate the effects of plasma beta on linear, collisionless ion temperature…”
Get full text

Simulating Gyrokinetic Microinstabilities in Stellarator Geometry with GS2 by Baumgaertel, J. A, Belli, E. A, Dorland, W, Guttenfelder, W, Hammett, G. W, Mikkelsen, D. R, Rewoldt, G, Tang, W. M, Xanthopoulos, P

“…Phys. Plasmas 18, 122301 (2011) The nonlinear gyrokinetic code GS2 has been extended to treat non-axisymmetric stellarator geometry. Electromagnetic…”
Get full text

An Enhanced Nonlinear Critical Gradient for Electron Turbulent Transport due to Reversed Magnetic Shear by Peterson, J. L, Hammett, G. W, Mikkelsen, D. R, Yuh, H. Y, Candy, J, Guttenfelder, W, Kaye, S. M, LeBlanc, B

“…The first nonlinear gyrokinetic simulations of electron internal transport barriers (e-ITBs) in the National Spherical Torus Experiment show that reversed…”
Get full text

Electromagnetic Transport from Microtearing Mode Turbulence by Guttenfelder, W., Kaye, S. M., Bell, R. E., Hammett, G. W., LeBlanc, B. P., Mikkelsen, D. R., Candy, J., Nevins, W. M., Wang, E., Yuh, H.

“…This Letter presents nonlinear gyrokinetic simulations of microtearing mode turbulence. The simulations include collisional and electromagnetic effects and use…”
Get full text

Electromagnetic Transport from Microtearing Mode Turbulence by Guttenfelder, W., Candy, J., Kaye, S. M., Nevins, W. M., Wang, E., Bell, R. E., Hammett, G. W., LeBlanc, B. P., Mikkelsen, D. R., Yuh, H.

“…This Letter presents nonlinear gyrokinetic simulations of microtearing mode turbulence. The simulations include collisional and electromagnetic effects and use…”
Get full text

Dimits Shift in Realistic Gyrokinetic Plasma-Turbulence Simulations by Mikkelsen, D. R., Dorland, W., University of Maryland, College Park, Maryland 20742

“…In simulations of turbulent plasma transport due to long wavelength (k{sub perpendicular}){rho}{sub i}{<=}1) electrostatic drift-type instabilities, we find a…”
Get full text

Suppression of Electron Temperature Gradient Turbulence via Negative Magnetic Shear in NSTX by Yuh, H. Y., Levinton, F. M., Kaye, S. M., Mazzucato, E., Mikkelsen, D. R., Bell, R. E., Hosea, J. C., LeBlanc, B. P., Peterson, J. L., Smith, D. R., Park, H. K., Lee, W.

“…Negative magnetic shear is found to suppress electron turbulence and improve electron thermal transport for plasmas in the National Spherical Torus Experiment…”
Get full text

Validation in Fusion Research: Towards Guidelines and Best Practices by Terry, P. W, Greenwald, M, Leboeuf, J. -N, McKee, G. R, Mikkelsen, D. R, Nevins, W. M, Newman, D. E, Stotler, D. P

“…Because experiment/model comparisons in magnetic confinement fusion have not yet satisfied the requirements for validation as understood broadly, a set of…”
Get full text

Techniques for measuring the alpha-particle distribution in magnetically confined plasmas by Post, D. E., Mikkelsen, D. R., Hulse, R. A., Stewart, L. D., Weisheit, J. C.

Get full text

MeV Light Atom Beams for Heating and/or Diagnostics of Tokamak Plasmas by Grisham, L. R., Post, D. E., Mikkelsen, D. R.

“…We have studied the possible usefulness and feasibility of multi-MeV beams of light atoms (6 ≤ A ≤ 30) for applications in magnetically confined plasmas. These…”
Get full text

Fusion power production from TFTR plasmas fueled with deuterium and tritium by Strachan, JD, Adler, H, Alling, P, Ancher, C, Anderson, H, Anderson, JL, Ashcroft, D, Barnes, CW, Barnes, G, Batha, S, Bell, MG, Bell, R, Bitter, M, Blanchard, W, Bretz, NL, Budny, R, Bush, CE, Camp, R, Caorlin, M, Cauffman, S, Chang, Z, Cheng, CZ, Collins, J, Coward, G, Darrow, DS, DeLooper, J, Duong, H, Dudek, L, Durst, R, Efthimion, PC, Ernst, D, Fisher, R, Fonck, RJ, Fredrickson, E, Fromm, N, Fu, GY, Furth, HP, Gentile, C, Gorelenkov, N, Grek, B, Grisham, LR, Hammett, G, Hanson, GR, Hawryluk, RJ, Heidbrink, W, Herrmann, HW, Hill, KW, Hosea, J, Hsuan, H, Janos, A, Jassby, DL, Jobes, FC, Johnson, DW, Johnson, LC, Kamperschroer, J, Kugel, H, Lam, NT, LaMarche, PH, Loughlin, MJ, LeBlanc, B, Leonard, M, Levinton, FM, Machuzak, J, Mansfield, DK

“…Peak fusion power production of 6.2 ± 0.4 MW has been achieved in TFTR plasmas heated by deuterium and tritium neutral beams at a total power of 29.5 MW. These…”
Get full text

Plasma wall interaction and tritium retention in TFTR by Skinner, C

“…The Tokamak Fusion Test Reactor (TFTR) has been operating safely and routinely with deuterium-tritium fuel for more than two years. In this time, TFTR has…”
Get full text

Confinement and heating of a deuterium-tritium plasma by Hawryluk, RJ, Adler, H, Alling, P, Ancher, C, Anderson, H, Anderson, JL, Ashcroft, D, Barnes, CW, Barnes, G, Batha, S, Bell, MG, Bell, R, Bitter, M, Blanchard, W, Bretz, NL, Budny, R, Bush, CE, Camp, R, Caorlin, M, Cauffman, S, Chang, Z, Cheng, CZ, Collins, J, Coward, G, Darrow, DS, DeLooper, J, Duong, H, Dudek, L, Durst, R, Efthimion, PC, Ernst, D, Fisher, R, Fonck, RJ, Fredrickson, E, Fromm, N, Fu, GY, Furth, HP, Gentile, C, Gorelenkov, N, Grek, B, Grisham, LR, Hammett, G, Hanson, GR, Heidbrink, W, Herrmann, HW, Hill, KW, Hosea, J, Hsuan, H, Janos, A, Jassby, DL, Jobes, FC, Johnson, DW, Johnson, LC, Kamperschroer, J, Kugel, H, Lam, NT, LaMarche, PH, Loughlin, MJ, LeBlanc, B, Leonard, M, Levinton, FM, Machuzak, J, Mansfield, DK, Martin, A

“…The Tomamak Fusion Test reactor has performed initial high-power experiments with the plasma fueled with nominally equal densities of deuterium and tritium…”
Get full text

Plasma-surface interactions in TFTR DT experiments by Owens, D.K., Adler, H., Alling, P., Ancher, C., Ashcroft, D., Barnes, Cris W., Barnes, G., Batha, S., Bell, M.G., Bell, R., Blanchard, W., Bretz, N.L., Budny, R., Bush, C.E., Camp, R., Caorlin, M., Cauffman, S., Chang, Z., Cheng, C.Z., Coward, G., Darrow, D.S., Duong, H., Dudek, L., Efthimion, P.C., Ernst, D., Fisher, R., Fonck, R.J., Fu, G.Y., Furth, H.P., Gentile, C., Gorelenkov, N., Grek, B., Grisham, L.R., Hawryluk, R.J., Hermann, H.W., Hill, K.W., Hosea, J., Janos, A., Jobes, F.C., Johnson, L.C., Kamperschroer, J., Lam, N.T., LaMarche, P.H., Loughlin, M.J., LeBlanc, B., Leonard, M., Machuzak, J., Mansfield, D.K., Majeski, R., Marmar, E., McChesney, J., McCormack, B., McCune, D.C., McGuire, K.M., McKee, G., Medley, S.S., Mikkelsen, D.R., Mueller, D., Murakami, M., Nagy, A., Nazikian, R., Newman, R., Nishitani, T., Norris, M., O'Connor, T., Osakabe, M., Park, W., Paul, S.F., Perry, E., Petrov, M., Phillips, C.K., Pitcher, S., Raftopoulos, S., Ramsey, A., Redi, M.H., Roberts, D., Rogers, J., Rossmassler, R., Sasao, M., Schilling, G., Schmidt, G.L., Sissingh, R., Skinner, C.H., Snipes, J., Stevens, J., Strachan, J.D., Taylor, G., Thompson, M.E., Vannoy, C., von Halle, A., von Goeler, S., Voorhees, D., Walters, R.T., Wieland, R., Wilgen, J.B., Williams, M., Wong, K.L., Wurden, G.A., Yamada, M., Zarnstorff, M.C.

“…TFTR has begun its campaign to study deuterium-tritium fusion under reactor-like conditions. Variable amounts of deuterium and tritium neutral beam power have…”
Get full text