ITER Test Blanket Module Error Field Experiments at DIII-D

M.J. Schaffer, J.A. Snipes, P. Gohil, Antti Salmi, Tuomas Tala, P.C. de Vries, T. E. Evans, M.E. Fenstermacher, X. Gao, A.M. Garofalo, D. A. Gates, C. M. Greenfield, W. W. Heidbrink, G.J. Kramer, R.J. La Haye, S. Liu, A. Loarte, M.F.F. Nave, T. H. Osborne, N. Oyama & 21 others J.K. Park, N. Ramasubramanian, H. Reimerdes, G. Saibene, K. Shinohara, D. A. Spong, W.M. Solomon, J.A. Boedo, V. Chuyanov, E.J. Doyle, M. Jakubowski, H. Jhang, R. M. Nazikian, V. D. Pustovitov, O. Schmitz, R. Srinivasan, T. S. Taylor, M.R. Wade, K. I. You, L. Zeng, DIII-D Team

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

Experiments at DIII-D investigated the effects of ferromagnetic error fields similar to those expected from proposed ITER Test Blanket Modules (TBMs). Studied were effects on: plasma rotation and locking; confinement; L-H transition; edge localized mode (ELM) suppression by resonant magnetic perturbations; ELMs and the H-mode pedestal; energetic particle losses; and more. The experiments used a 3-coil mock-up of 2 magnetized ITER TBMs in one ITER equatorial port. The experiments did not reveal any effect likely to preclude ITER operations with a TBM-like error field. The largest effect was slowed plasma toroidal rotation ν across the entire radial profile by as much as Δν/ν0 ~50% via non-resonant braking. Changes to global Δn/n, Δβ/β and ΔH98/H98 were ~3 times smaller. These effects are stronger at higher β and lower ν. Other effects were smaller. The TBM field increased sensitivity to locking by an applied n=1 test field, but it was nulled in an L-mode plasma by re-adjusting the DIII-D n=1 error field compensation system. Numerical modeling by IPEC reproduces the locking semi-quantitatively and predicts similar compensation of locking in H-mode.
Original languageEnglish
Title of host publicationProceedings of the 23rd IAEA Fusion Energy Conference
PublisherInternational Atomic Energy Agency IAEA
Publication statusPublished - 2010
MoE publication typeNot Eligible
Event23rd IAEA Fusion Energy Conference, FEC 2010 - Daejon, Korea, Republic of
Duration: 10 Oct 201016 Oct 2010

Conference

Conference23rd IAEA Fusion Energy Conference, FEC 2010
CountryKorea, Republic of
CityDaejon
Period10/10/1016/10/10

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blankets
modules
locking
toroidal plasmas
braking
field tests
energetic particles
coils
adjusting
retarding
perturbation
sensitivity
profiles

Cite this

Schaffer, M. J., Snipes, J. A., Gohil, P., Salmi, A., Tala, T., de Vries, P. C., ... DIII-D Team (2010). ITER Test Blanket Module Error Field Experiments at DIII-D. In Proceedings of the 23rd IAEA Fusion Energy Conference [ITR/1-3] International Atomic Energy Agency IAEA.
Schaffer, M.J. ; Snipes, J.A. ; Gohil, P. ; Salmi, Antti ; Tala, Tuomas ; de Vries, P.C. ; Evans, T. E. ; Fenstermacher, M.E. ; Gao, X. ; Garofalo, A.M. ; Gates, D. A. ; Greenfield, C. M. ; Heidbrink, W. W. ; Kramer, G.J. ; La Haye, R.J. ; Liu, S. ; Loarte, A. ; Nave, M.F.F. ; Osborne, T. H. ; Oyama, N. ; Park, J.K. ; Ramasubramanian, N. ; Reimerdes, H. ; Saibene, G. ; Shinohara, K. ; Spong, D. A. ; Solomon, W.M. ; Boedo, J.A. ; Chuyanov, V. ; Doyle, E.J. ; Jakubowski, M. ; Jhang, H. ; Nazikian, R. M. ; Pustovitov, V. D. ; Schmitz, O. ; Srinivasan, R. ; Taylor, T. S. ; Wade, M.R. ; You, K. I. ; Zeng, L. ; DIII-D Team. / ITER Test Blanket Module Error Field Experiments at DIII-D. Proceedings of the 23rd IAEA Fusion Energy Conference. International Atomic Energy Agency IAEA, 2010.
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title = "ITER Test Blanket Module Error Field Experiments at DIII-D",
abstract = "Experiments at DIII-D investigated the effects of ferromagnetic error fields similar to those expected from proposed ITER Test Blanket Modules (TBMs). Studied were effects on: plasma rotation and locking; confinement; L-H transition; edge localized mode (ELM) suppression by resonant magnetic perturbations; ELMs and the H-mode pedestal; energetic particle losses; and more. The experiments used a 3-coil mock-up of 2 magnetized ITER TBMs in one ITER equatorial port. The experiments did not reveal any effect likely to preclude ITER operations with a TBM-like error field. The largest effect was slowed plasma toroidal rotation ν across the entire radial profile by as much as Δν/ν0 ~50{\%} via non-resonant braking. Changes to global Δn/n, Δβ/β and ΔH98/H98 were ~3 times smaller. These effects are stronger at higher β and lower ν. Other effects were smaller. The TBM field increased sensitivity to locking by an applied n=1 test field, but it was nulled in an L-mode plasma by re-adjusting the DIII-D n=1 error field compensation system. Numerical modeling by IPEC reproduces the locking semi-quantitatively and predicts similar compensation of locking in H-mode.",
author = "M.J. Schaffer and J.A. Snipes and P. Gohil and Antti Salmi and Tuomas Tala and {de Vries}, P.C. and Evans, {T. E.} and M.E. Fenstermacher and X. Gao and A.M. Garofalo and Gates, {D. A.} and Greenfield, {C. M.} and Heidbrink, {W. W.} and G.J. Kramer and {La Haye}, R.J. and S. Liu and A. Loarte and M.F.F. Nave and Osborne, {T. H.} and N. Oyama and J.K. Park and N. Ramasubramanian and H. Reimerdes and G. Saibene and K. Shinohara and Spong, {D. A.} and W.M. Solomon and J.A. Boedo and V. Chuyanov and E.J. Doyle and M. Jakubowski and H. Jhang and Nazikian, {R. M.} and Pustovitov, {V. D.} and O. Schmitz and R. Srinivasan and Taylor, {T. S.} and M.R. Wade and You, {K. I.} and L. Zeng and {DIII-D Team}",
year = "2010",
language = "English",
booktitle = "Proceedings of the 23rd IAEA Fusion Energy Conference",
publisher = "International Atomic Energy Agency IAEA",
address = "Austria",

}

Schaffer, MJ, Snipes, JA, Gohil, P, Salmi, A, Tala, T, de Vries, PC, Evans, TE, Fenstermacher, ME, Gao, X, Garofalo, AM, Gates, DA, Greenfield, CM, Heidbrink, WW, Kramer, GJ, La Haye, RJ, Liu, S, Loarte, A, Nave, MFF, Osborne, TH, Oyama, N, Park, JK, Ramasubramanian, N, Reimerdes, H, Saibene, G, Shinohara, K, Spong, DA, Solomon, WM, Boedo, JA, Chuyanov, V, Doyle, EJ, Jakubowski, M, Jhang, H, Nazikian, RM, Pustovitov, VD, Schmitz, O, Srinivasan, R, Taylor, TS, Wade, MR, You, KI, Zeng, L & DIII-D Team 2010, ITER Test Blanket Module Error Field Experiments at DIII-D. in Proceedings of the 23rd IAEA Fusion Energy Conference., ITR/1-3, International Atomic Energy Agency IAEA, 23rd IAEA Fusion Energy Conference, FEC 2010, Daejon, Korea, Republic of, 10/10/10.

ITER Test Blanket Module Error Field Experiments at DIII-D. / Schaffer, M.J.; Snipes, J.A.; Gohil, P.; Salmi, Antti; Tala, Tuomas; de Vries, P.C.; Evans, T. E.; Fenstermacher, M.E.; Gao, X.; Garofalo, A.M.; Gates, D. A.; Greenfield, C. M.; Heidbrink, W. W.; Kramer, G.J.; La Haye, R.J.; Liu, S.; Loarte, A.; Nave, M.F.F.; Osborne, T. H.; Oyama, N.; Park, J.K.; Ramasubramanian, N.; Reimerdes, H.; Saibene, G.; Shinohara, K.; Spong, D. A.; Solomon, W.M.; Boedo, J.A.; Chuyanov, V.; Doyle, E.J.; Jakubowski, M.; Jhang, H.; Nazikian, R. M.; Pustovitov, V. D.; Schmitz, O.; Srinivasan, R.; Taylor, T. S.; Wade, M.R.; You, K. I.; Zeng, L.; DIII-D Team.

Proceedings of the 23rd IAEA Fusion Energy Conference. International Atomic Energy Agency IAEA, 2010. ITR/1-3.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

TY - GEN

T1 - ITER Test Blanket Module Error Field Experiments at DIII-D

AU - Schaffer, M.J.

AU - Snipes, J.A.

AU - Gohil, P.

AU - Salmi, Antti

AU - Tala, Tuomas

AU - de Vries, P.C.

AU - Evans, T. E.

AU - Fenstermacher, M.E.

AU - Gao, X.

AU - Garofalo, A.M.

AU - Gates, D. A.

AU - Greenfield, C. M.

AU - Heidbrink, W. W.

AU - Kramer, G.J.

AU - La Haye, R.J.

AU - Liu, S.

AU - Loarte, A.

AU - Nave, M.F.F.

AU - Osborne, T. H.

AU - Oyama, N.

AU - Park, J.K.

AU - Ramasubramanian, N.

AU - Reimerdes, H.

AU - Saibene, G.

AU - Shinohara, K.

AU - Spong, D. A.

AU - Solomon, W.M.

AU - Boedo, J.A.

AU - Chuyanov, V.

AU - Doyle, E.J.

AU - Jakubowski, M.

AU - Jhang, H.

AU - Nazikian, R. M.

AU - Pustovitov, V. D.

AU - Schmitz, O.

AU - Srinivasan, R.

AU - Taylor, T. S.

AU - Wade, M.R.

AU - You, K. I.

AU - Zeng, L.

AU - DIII-D Team

PY - 2010

Y1 - 2010

N2 - Experiments at DIII-D investigated the effects of ferromagnetic error fields similar to those expected from proposed ITER Test Blanket Modules (TBMs). Studied were effects on: plasma rotation and locking; confinement; L-H transition; edge localized mode (ELM) suppression by resonant magnetic perturbations; ELMs and the H-mode pedestal; energetic particle losses; and more. The experiments used a 3-coil mock-up of 2 magnetized ITER TBMs in one ITER equatorial port. The experiments did not reveal any effect likely to preclude ITER operations with a TBM-like error field. The largest effect was slowed plasma toroidal rotation ν across the entire radial profile by as much as Δν/ν0 ~50% via non-resonant braking. Changes to global Δn/n, Δβ/β and ΔH98/H98 were ~3 times smaller. These effects are stronger at higher β and lower ν. Other effects were smaller. The TBM field increased sensitivity to locking by an applied n=1 test field, but it was nulled in an L-mode plasma by re-adjusting the DIII-D n=1 error field compensation system. Numerical modeling by IPEC reproduces the locking semi-quantitatively and predicts similar compensation of locking in H-mode.

AB - Experiments at DIII-D investigated the effects of ferromagnetic error fields similar to those expected from proposed ITER Test Blanket Modules (TBMs). Studied were effects on: plasma rotation and locking; confinement; L-H transition; edge localized mode (ELM) suppression by resonant magnetic perturbations; ELMs and the H-mode pedestal; energetic particle losses; and more. The experiments used a 3-coil mock-up of 2 magnetized ITER TBMs in one ITER equatorial port. The experiments did not reveal any effect likely to preclude ITER operations with a TBM-like error field. The largest effect was slowed plasma toroidal rotation ν across the entire radial profile by as much as Δν/ν0 ~50% via non-resonant braking. Changes to global Δn/n, Δβ/β and ΔH98/H98 were ~3 times smaller. These effects are stronger at higher β and lower ν. Other effects were smaller. The TBM field increased sensitivity to locking by an applied n=1 test field, but it was nulled in an L-mode plasma by re-adjusting the DIII-D n=1 error field compensation system. Numerical modeling by IPEC reproduces the locking semi-quantitatively and predicts similar compensation of locking in H-mode.

M3 - Conference article in proceedings

BT - Proceedings of the 23rd IAEA Fusion Energy Conference

PB - International Atomic Energy Agency IAEA

ER -

Schaffer MJ, Snipes JA, Gohil P, Salmi A, Tala T, de Vries PC et al. ITER Test Blanket Module Error Field Experiments at DIII-D. In Proceedings of the 23rd IAEA Fusion Energy Conference. International Atomic Energy Agency IAEA. 2010. ITR/1-3