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11 results on '"Hirshman SP"'

1. OVERVIEW OF RECENT TFTR RESULTS

Author

ZARNSTORFF, MC, BATEMAN, G, BATHA, SH, BEER, M, BELL, MG, BELL, RE, BIGLARI, H, BITTER, M, BOIVIN, R, BRETZ, NL, BUDNY, RV, BUSH, CE, CALLEN, JD, CHANG, Z, CHEN, L, CHENG, CZ, COWLEY, SC, DARROW, DS, DURST, RD, EFTHIMION, PC, FONCK, RJ, FREDRICKSON, ED, FU, GY, FURTH, HP, GREENE, GJ, GREK, B, GRISHAM, LR, HAMMETT, GW, HAWRYLUK, RJ, HEIDBRINK, WW, HILL, KW, HIRSHMAN, SP, HOFFMAN, DJ, HOSEA, JC, HUGHES, M, HULSE, RA, JANOS, AC, JASSBY, DL, JOBES, FC, JOHNSON, DW, JOHNSON, LC, KAMPERSCHROER, J, KESNER, J, KUGEL, H, LAMARCHE, PH, LEBLANC, B, LEVINTON, F, MACHUZAK, JS, MAJESKI, R, MANOS, DM, MANSFFIELD, DK, MARMAR, ES, MAUEL, ME, MAZZUCATO, E, MCCARTHY, MP, MCCUNE, DC, MCGUIRE, KM, MEADE, DM, MEDLEY, SS, MIKKELSEN, DR, MONTICELLO, DA, MUELLER, D, MURAKAMI, M, MURPHY, J, NAGAYAMA, Y, NAVRATIL, GA, NAZIKIAN, R, OWENS, DK, PARK, HK, PARK, W, PAUL, SF, PERKINS, FW, PERRY, E, PHILLIPS, CK, PHILLIPS, M, PITCHER, S, POMPHREY, N, RASMUSSEN, DA, REDI, MH, REWOLDT, G, RIMINI, F, ROBERTS, D, ROQUEMORE, AL, SABBAGH, SA, SCHILLING, G, SCHIVELL, J, SCHMIDT, GL, SCOTT, SD, SNIPES, JA, STEVENS, JE, STODIEK, W, STRACHAN, JD, STRATTON, BC, SYNAKOWSKI, EJ, TANG, WM, TAYLOR, G, TERRY, JL, THOMPSON, M, TOWNER, HH, and TSUI, H

Published
1993

2. A 3D approach to equilibrium, stability and transport studies in RFX-mod improved regimes RID B-1418-2009 RID B-6676-2011 RID G-6971-2011

Author

Terranova, D, Bonfiglio, D, Boozer, Ah, Cooper, Aw, Gobbin, M, Hirshman, Sp, Lorenzini, R, Marrelli, L, Martines, E, Momo, B, Pomphrey, N, Predebon, I, Sanchez, R, Spizzo, G, Agostini, M, Alfier, A, Apolloni, L, Auriemma, F, Baruzzo, M, Bolzonella, T, Bonomo, F, Brombin, M, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Dal Bello, S, Delogu, R, De Masi, G, Drevlak, M, Fassina, A, Ferro, A, Franz, P, Gaio, E, Gazza, E, Giudicotti, Leonardo, Grando, L, Guo, Sc, Innocente, P, Lopez Bruna, D, Manduchi, G, Marchiori, G, Martin, Piero, Martini, S, Menmuir, S, Munaretto, S, Novello, L, Paccagnella, R, Pasqualotto, R, Pereverzev, Gv, Piovan, R, Piovesan, P, Piron, L, Puiatti, Me, Recchia, M, Sattin, F, Scarin, P, Serianni, G, Soppelsa, A, Spagnolo, S, Spolaore, M, Taliercio, C, Valisa, M, Vianello, N, Wang, Z, Zamengo, A, Zaniol, B, Zanotto, L, Zanca, P, and Zuin, M.

Published
2010

3. Overview of the RFX fusion science program

Author

Martin, P, Adamek, J, Agostinetti, P, Agostini, M, Alfier, A, Angioni, C, Antoni, V, Apolloni, L, Auriemma, F, Barana, O, Barison, S, Baruzzo, M, Bettini, P, Boldrin, M, Bolzonella, T, Bonfiglio, D, Bonomo, F, Boozer, A, Brombin, M, Brotankova, J, Buffa, A, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Cavinato, M, Chacon, L, Chitarin, G, Cooper, W, Dal Bello, S, Dalla Palma, M, Delogu, R, De Lorenzi, A, De Masi, G, Dong, J, Drevlak, M, Escande, D, Fantini, F, Fassina, A, Fellin, F, Ferro, A, Fiameni, S, Fiorentin, A, Franz, P, Gaio, E, Garbet, X, Gazza, E, Giudicotti, L, Gnesotto, F, Gobbin, M, Grando, L, Guo, S, Hirano, Y, Hirshman, S, Ide, S, Igochine, V, In, Y, Innocente, P, Kiyama, S, Liu, S, Liu, Y, Bruna, D, Lorenzini, R, Luchetta, A, Manduchi, G, Mansfield, D, Marchiori, G, Marcuzzi, D, Marrelli, L, Martini, S, Matsunaga, G, Martines, E, Mazzitelli, G, Mccollam, K, Menmuir, S, Milani, F, Momo, B, Moresco, M, Munaretto, S, Novello, L, Okabayashi, M, Ortolani, S, Paccagnella, R, Pasqualotto, R, Pavei, M, Perverezev, G, Peruzzo, S, Piovan, R, Piovesan, P, Piron, L, Pizzimenti, A, Pomaro, N, Pomphrey, N, Predebon, I, Puiatti, M, Rigato, V, Rizzolo, A, Rostagni, G, Rubinacci, G, Ruzzon, A, Sakakita, H, Sanchez, R, Sarff, J, Sattin, F, Scaggion, A, Scarin, P, Schneider, W, Serianni, G, Sonato, P, Spada, E, Soppelsa, A, Spagnolo, S, Spolaore, M, Spong, D, Spizzo, G, Takechi, M, Taliercio, C, Terranova, D, Toigo, V, Valisa, M, Veranda, M, Vianello, N, Villone, F, Wang, Z, White, R, Yadikin, D, Zaccaria, P, Zamengo, A, Zanca, P, Zaniol, B, Zanotto, L, Zilli, E, Zollino, G, Zuin, M, Martin P, Adamek J, Agostinetti P, Agostini M, Alfier A, Angioni C, Antoni V, Apolloni L, Auriemma F, Barana O, Barison S, Baruzzo M, Bettini P, Boldrin M, Bolzonella T, Bonfiglio D, Bonomo F, Boozer AH, Brombin M, Brotankova J, Buffa A, Canton A, Cappello S, Carraro L, Cavazzana R, Cavinato M, Chacon L, Chitarin G, Cooper WA, Dal Bello S, Dalla Palma M, Delogu R, De Lorenzi A, De Masi G, Dong JQ, Drevlak M, Escande DF, Fantini F, Fassina A, Fellin F, Ferro A, Fiameni S, Fiorentin A, Franz P, Gaio E, Garbet X, Gazza E, Giudicotti L, Gnesotto F, Gobbin M, Grando L, Guo SC, Hirano Y, Hirshman SP, Ide S, Igochine V, In Y, Innocente P, Kiyama S, Liu SF, Liu YQ, Bruna DL, Lorenzini R, Luchetta A, Manduchi G, Mansfield DK, Marchiori G, Marcuzzi D, Marrelli L, Martini S, Matsunaga G, Martines E, Mazzitelli G, McCollam K, Menmuir S, Milani F, Momo B, Moresco M, Munaretto S, Novello L, Okabayashi M, Ortolani S, Paccagnella R, Pasqualotto R, Pavei M, Perverezev GV, Peruzzo S, Piovan R, Piovesan P, Piron L, Pizzimenti A, Pomaro N, Pomphrey N, Predebon I, Puiatti ME, Rigato V, Rizzolo A, Rostagni G, Rubinacci G, Ruzzon A, Sakakita H, Sanchez R, Sarff JS, Sattin F, Scaggion A, Scarin P, Schneider W, Serianni G, Sonato P, Spada E, Soppelsa A, Spagnolo S, Spolaore M, Spong DA, Spizzo G, Takechi M, Taliercio C, Terranova D, Toigo V, Valisa M, Veranda M, Vianello N, Villone F, Wang Z, White RB, Yadikin D, Zaccaria P, Zamengo A, Zanca P, Zaniol B, Zanotto L, Zilli E, Zollino G, Zuin M, Martin, P, Adamek, J, Agostinetti, P, Agostini, M, Alfier, A, Angioni, C, Antoni, V, Apolloni, L, Auriemma, F, Barana, O, Barison, S, Baruzzo, M, Bettini, P, Boldrin, M, Bolzonella, T, Bonfiglio, D, Bonomo, F, Boozer, A, Brombin, M, Brotankova, J, Buffa, A, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Cavinato, M, Chacon, L, Chitarin, G, Cooper, W, Dal Bello, S, Dalla Palma, M, Delogu, R, De Lorenzi, A, De Masi, G, Dong, J, Drevlak, M, Escande, D, Fantini, F, Fassina, A, Fellin, F, Ferro, A, Fiameni, S, Fiorentin, A, Franz, P, Gaio, E, Garbet, X, Gazza, E, Giudicotti, L, Gnesotto, F, Gobbin, M, Grando, L, Guo, S, Hirano, Y, Hirshman, S, Ide, S, Igochine, V, In, Y, Innocente, P, Kiyama, S, Liu, S, Liu, Y, Bruna, D, Lorenzini, R, Luchetta, A, Manduchi, G, Mansfield, D, Marchiori, G, Marcuzzi, D, Marrelli, L, Martini, S, Matsunaga, G, Martines, E, Mazzitelli, G, Mccollam, K, Menmuir, S, Milani, F, Momo, B, Moresco, M, Munaretto, S, Novello, L, Okabayashi, M, Ortolani, S, Paccagnella, R, Pasqualotto, R, Pavei, M, Perverezev, G, Peruzzo, S, Piovan, R, Piovesan, P, Piron, L, Pizzimenti, A, Pomaro, N, Pomphrey, N, Predebon, I, Puiatti, M, Rigato, V, Rizzolo, A, Rostagni, G, Rubinacci, G, Ruzzon, A, Sakakita, H, Sanchez, R, Sarff, J, Sattin, F, Scaggion, A, Scarin, P, Schneider, W, Serianni, G, Sonato, P, Spada, E, Soppelsa, A, Spagnolo, S, Spolaore, M, Spong, D, Spizzo, G, Takechi, M, Taliercio, C, Terranova, D, Toigo, V, Valisa, M, Veranda, M, Vianello, N, Villone, F, Wang, Z, White, R, Yadikin, D, Zaccaria, P, Zamengo, A, Zanca, P, Zaniol, B, Zanotto, L, Zilli, E, Zollino, G, Zuin, M, Martin P, Adamek J, Agostinetti P, Agostini M, Alfier A, Angioni C, Antoni V, Apolloni L, Auriemma F, Barana O, Barison S, Baruzzo M, Bettini P, Boldrin M, Bolzonella T, Bonfiglio D, Bonomo F, Boozer AH, Brombin M, Brotankova J, Buffa A, Canton A, Cappello S, Carraro L, Cavazzana R, Cavinato M, Chacon L, Chitarin G, Cooper WA, Dal Bello S, Dalla Palma M, Delogu R, De Lorenzi A, De Masi G, Dong JQ, Drevlak M, Escande DF, Fantini F, Fassina A, Fellin F, Ferro A, Fiameni S, Fiorentin A, Franz P, Gaio E, Garbet X, Gazza E, Giudicotti L, Gnesotto F, Gobbin M, Grando L, Guo SC, Hirano Y, Hirshman SP, Ide S, Igochine V, In Y, Innocente P, Kiyama S, Liu SF, Liu YQ, Bruna DL, Lorenzini R, Luchetta A, Manduchi G, Mansfield DK, Marchiori G, Marcuzzi D, Marrelli L, Martini S, Matsunaga G, Martines E, Mazzitelli G, McCollam K, Menmuir S, Milani F, Momo B, Moresco M, Munaretto S, Novello L, Okabayashi M, Ortolani S, Paccagnella R, Pasqualotto R, Pavei M, Perverezev GV, Peruzzo S, Piovan R, Piovesan P, Piron L, Pizzimenti A, Pomaro N, Pomphrey N, Predebon I, Puiatti ME, Rigato V, Rizzolo A, Rostagni G, Rubinacci G, Ruzzon A, Sakakita H, Sanchez R, Sarff JS, Sattin F, Scaggion A, Scarin P, Schneider W, Serianni G, Sonato P, Spada E, Soppelsa A, Spagnolo S, Spolaore M, Spong DA, Spizzo G, Takechi M, Taliercio C, Terranova D, Toigo V, Valisa M, Veranda M, Vianello N, Villone F, Wang Z, White RB, Yadikin D, Zaccaria P, Zamengo A, Zanca P, Zaniol B, Zanotto L, Zilli E, Zollino G, and Zuin M

Abstract

This paper summarizes the main achievements of the RFX fusion science program in the period between the 2008 and 2010 IAEA Fusion Energy Conferences. RFX-mod is the largest reversed field pinch in the world, equipped with a system of 192 coils for active control of MHD stability. The discovery and understanding of helical states with electron internal transport barriers and core electron temperature >1.5 keV significantly advances the perspectives of the configuration. Optimized experiments with plasma current up to 1.8 MA have been realized, confirming positive scaling. The first evidence of edge transport barriers is presented. Progress has been made also in the control of first-wall properties and of density profiles, with initial first-wall lithization experiments. Micro-turbulence mechanisms such as ion temperature gradient and micro-tearing are discussed in the framework of understanding gradient-driven transport in low magnetic chaos helical regimes. Both tearing mode and resistive wall mode active control have been optimized and experimental data have been used to benchmark numerical codes. The RFX programme also provides important results for the fusion community and in particular for tokamaks and stellarators on feedback control of MHD stability and on three-dimensional physics. On the latter topic, the result of the application of stellarator codes to describe three-dimensional reversed field pinch physics will be presented. © 2011 IAEA, Vienna.

Published
2011

4. Three-dimensional equilibria and transport in RFX-mod: A description using stellarator tools

Author

Gobbin, M, Bonfiglio, D, Boozer, A, Cooper, A, Escande, D, Hirshman, S, Lore, J, Lorenzini, R, Marrelli, L, Martin, P, Martines, E, Momo, B, Pomphrey, N, Predebon, I, Puiatti, M, Sanchez, R, Spizzo, G, Spong, D, Terranova, D, Gobbin M, Bonfiglio D, Boozer AH, Cooper AW, Escande DF, Hirshman SP, Lore J, Lorenzini R, Marrelli L, Martin P, Martines E, Momo B, Pomphrey N, Predebon I, Puiatti ME, Sanchez R, Spizzo G, Spong DA, Terranova D, Gobbin, M, Bonfiglio, D, Boozer, A, Cooper, A, Escande, D, Hirshman, S, Lore, J, Lorenzini, R, Marrelli, L, Martin, P, Martines, E, Momo, B, Pomphrey, N, Predebon, I, Puiatti, M, Sanchez, R, Spizzo, G, Spong, D, Terranova, D, Gobbin M, Bonfiglio D, Boozer AH, Cooper AW, Escande DF, Hirshman SP, Lore J, Lorenzini R, Marrelli L, Martin P, Martines E, Momo B, Pomphrey N, Predebon I, Puiatti ME, Sanchez R, Spizzo G, Spong DA, and Terranova D

Abstract

RFX-mod self-organized single helical axis (SHAx) states provide a unique opportunity to advance 3D fusion physics and establish a common knowledge basis in a parameter region not covered by stellarators and tokamaks. The VMEC code has been adapted to the reversed-field pinch (RFP) to model SHAx equilibria in fixed boundary mode with experimental measurements as constraint. The averaged particle diffusivity over the helical volume, estimated with the Monte Carlo code ORBIT, has a neoclassical-like dependence on collisionality and does not show the 1/ trend of un-optimized stellarators. In particular, the helical region boundary, corresponding to an electron transport barrier with zero magnetic shear and improved confinement, has been investigated using numerical codes common to the stellarator community. In fact, the DKES/PENTA codes have been applied to RFP for local neoclassical transport computations, including radial electric field, to estimate thermal diffusion coefficients in the barrier region for typical RFX-mod temperature and density profiles. A comparison with power balance estimates shows that residual chaos due to secondary tearing modes and small-scale turbulence still contribute to drive anomalous transport in the barrier region. © 2011 American Institute of Physics.

Published
2011

5. A 3D approach to equilibrium, stability and transport studies in RFX-mod improved regimes

Author

Terranova, D, Bonfiglio, D, Boozer, A, Cooper, A, Gobbin, M, Hirshman, S, Lorenzini, R, Marrelli, L, Martines, E, Momo, B, Pomphrey, N, Predebon, I, Sanchez, R, Spizzo, G, Agostini, M, Alfier, A, Apolloni, L, Auriemma, F, Baruzzo, M, Bolzonella, T, Bonomo, F, Brombin, M, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Dal Bello, S, Delogu, R, De Masi, G, Drevlak, M, Fassina, A, Ferro, A, Franz, P, Gaio, E, Gazza, E, Giudicotti, L, Grando, L, Guo, S, Innocente, P, Lopez-Bruna, D, Manduchi, G, Marchiori, G, Martin, P, Martini, S, Menmuir, S, Munaretto, S, Novello, L, Paccagnella, R, Pasqualotto, R, Pereverzev, G, Piovan, R, Piovesan, P, Piron, L, Puiatti, M, Recchia, M, Sattin, F, Scarin, P, Serianni, G, Soppelsa, A, Spagnolo, S, Spolaore, M, Taliercio, C, Valisa, M, Vianello, N, Wang, Z, Zamengo, A, Zaniol, B, Zanotto, L, Zanca, P, Zuin, M, Terranova D, Bonfiglio D, Boozer AH, Cooper AW, Gobbin M, Hirshman SP, Lorenzini R, Marrelli L, Martines E, Momo B, Pomphrey N, Predebon I, Sanchez R, Spizzo G, Agostini M, Alfier A, Apolloni L, Auriemma F, Baruzzo M, Bolzonella T, Bonomo F, Brombin M, Canton A, Cappello S, Carraro L, Cavazzana R, Dal Bello S, Delogu R, De Masi G, Drevlak M, Fassina A, Ferro A, Franz P, Gaio E, Gazza E, Giudicotti L, Grando L, Guo SC, Innocente P, Lopez-Bruna D, Manduchi G, Marchiori G, Martin P, Martini S, Menmuir S, Munaretto S, Novello L, Paccagnella R, Pasqualotto R, Pereverzev GV, Piovan R, Piovesan P, Piron L, Puiatti ME, Recchia M, Sattin F, Scarin P, Serianni G, Soppelsa A, Spagnolo S, Spolaore M, Taliercio C, Valisa M, Vianello N, Wang Z, Zamengo A, Zaniol B, Zanotto L, Zanca P, Zuin M, Terranova, D, Bonfiglio, D, Boozer, A, Cooper, A, Gobbin, M, Hirshman, S, Lorenzini, R, Marrelli, L, Martines, E, Momo, B, Pomphrey, N, Predebon, I, Sanchez, R, Spizzo, G, Agostini, M, Alfier, A, Apolloni, L, Auriemma, F, Baruzzo, M, Bolzonella, T, Bonomo, F, Brombin, M, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Dal Bello, S, Delogu, R, De Masi, G, Drevlak, M, Fassina, A, Ferro, A, Franz, P, Gaio, E, Gazza, E, Giudicotti, L, Grando, L, Guo, S, Innocente, P, Lopez-Bruna, D, Manduchi, G, Marchiori, G, Martin, P, Martini, S, Menmuir, S, Munaretto, S, Novello, L, Paccagnella, R, Pasqualotto, R, Pereverzev, G, Piovan, R, Piovesan, P, Piron, L, Puiatti, M, Recchia, M, Sattin, F, Scarin, P, Serianni, G, Soppelsa, A, Spagnolo, S, Spolaore, M, Taliercio, C, Valisa, M, Vianello, N, Wang, Z, Zamengo, A, Zaniol, B, Zanotto, L, Zanca, P, Zuin, M, Terranova D, Bonfiglio D, Boozer AH, Cooper AW, Gobbin M, Hirshman SP, Lorenzini R, Marrelli L, Martines E, Momo B, Pomphrey N, Predebon I, Sanchez R, Spizzo G, Agostini M, Alfier A, Apolloni L, Auriemma F, Baruzzo M, Bolzonella T, Bonomo F, Brombin M, Canton A, Cappello S, Carraro L, Cavazzana R, Dal Bello S, Delogu R, De Masi G, Drevlak M, Fassina A, Ferro A, Franz P, Gaio E, Gazza E, Giudicotti L, Grando L, Guo SC, Innocente P, Lopez-Bruna D, Manduchi G, Marchiori G, Martin P, Martini S, Menmuir S, Munaretto S, Novello L, Paccagnella R, Pasqualotto R, Pereverzev GV, Piovan R, Piovesan P, Piron L, Puiatti ME, Recchia M, Sattin F, Scarin P, Serianni G, Soppelsa A, Spagnolo S, Spolaore M, Taliercio C, Valisa M, Vianello N, Wang Z, Zamengo A, Zaniol B, Zanotto L, Zanca P, and Zuin M

Abstract

The full three-dimensional (3D) approach is now becoming an important issue for all magnetic confinement configurations. It is a necessary condition for the stellarator but also the tokamak and the reversed field pinch (RFP) now cannot be completely described in an axisymmetric framework. For the RFP the observation of self-sustained helical configurations with improved plasma performances require a better description in order to assess a new view on this configuration. In this new framework plasma configuration studies for RFX-mod have been considered both with tools developed for the RFP as well as considering codes originally developed for the stellarator and adapted to the RFP. These helical states are reached through a transition to a very low/reversed shear configuration leading to internal electron transport barriers. These states are interrupted by MHD reconnection events and the large Te gradients at the barriers indicate that both current and pressure driven modes are to be considered. Furthermore the typically flat Te profiles in the helical core have raised the issue of the role of electrostatic and electromagnetic turbulence in these reduced chaos regions, so that a stability analysis in the correct 3D geometry is required to address an optimization of the plasma setup. In this viewtheVMECcode proved to be an effectiveway to obtain helical equilibria to be studied in terms of stability and transport with a suite of well tested codes. In this work, the equilibrium reconstruction technique as well as the experimental evidence of 3D effects and their first interpretation in terms of stability and transport are presented using both RFP and stellarator tools. © 2010 IOP Publishing Ltd.

Published
2010

6. OVERVIEW OF RECENT TFTR RESULTS

Author

Zarnstorff, Mc, Bateman, G., Batha, Sh, Beer, M., Bell, Mg, Bell, Re, Biglari, H., Bitter, M., Boivin, R., Bretz, Nl, Budny, Rv, Bush, Ce, Callen, Jd, Chang, Z., Chen, L., Cheng, Cz, Cowley, Sc, Darrow, Ds, Durst, Rd, Efthimion, Pc, Fonck, Rj, Fredrickson, Ed, Fu, Gy, Furth, Hp, Greene, Gj, Grek, B., Grisham, Lr, Hammett, Gw, Hawryluk, Rj, Heidbrink, Ww, Hill, Kw, Hirshman, Sp, Hoffman, Dj, Hosea, Jc, Hughes, M., Hulse, Ra, Janos, Ac, Jassby, Dl, Jobes, Fc, Johnson, Dw, Johnson, Lc, Kamperschroer, J., Kesner, J., Kugel, H., Lamarche, Ph, Leblanc, B., Levinton, F., Machuzak, Js, Majeski, R., Manos, Dm, Mansffield, Dk, Marmar, Es, Mauel, Me, Mazzucato, E., Mccarthy, Mp, Mccune, Dc, Mcguire, Km, Meade, Dm, Medley, Ss, Mikkelsen, Dr, Monticello, Da, Mueller, D., Murakami, M., Murphy, J., Nagayama, Y., Navratil, Ga, Nazikian, R., Owens, Dk, Park, Hk, Park, W., Paul, Sf, Perkins, Fw, Perry, E., Phillips, Ck, Phillips, M., Pitcher, S., Pomphrey, N., Rasmussen, Da, Redi, Mh, Rewoldt, G., Rimini, F., Roberts, D., Roquemore, Al, Sabbagh, Sa, Schilling, G., Schivell, J., Schmidt, Gl, Scott, Sd, Snipes, Ja, Stevens, Je, Stodiek, W., Strachan, Jd, Stratton, Bc, Synakowski, Ej, Tang, Wm, Taylor, G., Terry, Jl, Thompson, M., Towner, Hh, Tsui, H., Tuszewski, M., Ulrickson, M., Vongoeler, S., Vonhalle, A., Wieland, Rm, William Tang, Wilson, Jr, Wong, Kl, Woskov, P., Wurden, Ga, Yamada, M., Young, Km, and Zweben, Sj

7. OVERVIEW OF RECENT TFTR RESULTS

Author

Zarnstorff, Mc, Bateman, G., Batha, Sh, Beer, M., Bell, Mg, Bell, Re, Biglari, H., Bitter, M., Boivin, R., Bretz, Nl, Budny, Rv, Bush, Ce, Callen, Jd, Chang, Z., Chen, L., Cheng, Cz, Cowley, Sc, Darrow, Ds, Durst, Rd, Efthimion, Pc, Fonck, Rj, Fredrickson, Ed, Fu, Gy, Furth, Hp, Greene, Gj, Grek, B., Grisham, Lr, Gregory Hammett, Hawryluk, Rj, Heidbrink, Ww, Hill, Kw, Hirshman, Sp, Hoffman, Dj, Hosea, Jc, Hughes, M., Hulse, Ra, Janos, Ac, Jassby, Dl, Jobes, Fc, Johnson, Dw, Johnson, Lc, Kamperschroer, J., Kesner, J., Kugel, H., Lamarche, Ph, Leblanc, B., Levinton, F., Machuzak, Js, Majeski, R., Manos, Dm, Mansffield, Dk, Marmar, Es, Mauel, Me, Mazzucato, E., Mccarthy, Mp, Mccune, Dc, Mcguire, Km, Meade, Dm, Medley, Ss, Mikkelsen, Dr, Monticello, Da, Mueller, D., Murakami, M., Murphy, J., Nagayama, Y., Navratil, Ga, Nazikian, R., Owens, Dk, Park, Hk, Park, W., Paul, Sf, Perkins, Fw, Perry, E., Phillips, Ck, Phillips, M., Pitcher, S., Pomphrey, N., Rasmussen, Da, Redi, Mh, Rewoldt, G., Rimini, F., Roberts, D., Roquemore, Al, Sabbagh, Sa, Schilling, G., Schivell, J., Schmidt, Gl, Scott, Sd, Snipes, Ja, Stevens, Je, Stodiek, W., Strachan, Jd, Stratton, Bc, Synakowski, Ej, Tang, Wm, Taylor, G., Terry, Jl, Thompson, M., Towner, Hh, Tsui, H., Tuszewski, M., Ulrickson, M., Vongoeler, S., Vonhalle, A., Wieland, Rm, Williams, M., Wilson, Jr, Wong, Kl, Woskov, P., Wurden, Ga, Yamada, M., Young, Km, Zweben, Sj, and INT ATOM ENERGY AGCY

8. Eliminating islands in high-pressure free-boundary stellarator magnetohydrodynamic equilibrium solutions.

Author

Hudson SR, Monticello DA, Reiman AH, Boozer AH, Strickler DJ, Hirshman SP, and Zarnstorff MC

Abstract

Magnetic islands in free-boundary stellarator equilibria are suppressed using a procedure that iterates the plasma equilibrium equations and, at each iteration, adjusts the coil geometry to cancel resonant fields produced by the plasma. The coils are constrained to satisfy certain measures of engineering acceptability and the plasma is constrained to ensure kink stability. As the iterations continue, the coil geometry and the plasma simultaneously converge to an equilibrium in which the island content is negligible. The method is applied with success to a candidate plasma and coil design for the National Compact Stellarator Experiment [Phys. Plasmas 8, 2083 (2001)]].

Published
2002
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9. High-beta equilibria of drift-optimized compact stellarators.

Author

Ware AS, Hirshman SP, Spong DA, Berry LA, Deisher AJ, Fu GY, Lyon JF, and Sanchez R

Abstract

Compact stellarator configurations have been obtained with good neoclassical confinement that are stable to both pressure- and current-driven modes for high values of beta. These configurations are drift-optimized tokamak-stellarator hybrids with a high-shear tokamak-like rotational transform profile and /B/ that is approximately poloidally symmetric. The bootstrap current is consistent with the required equilibrium current and, while larger than that in existing stellarators, is typically only a small fraction (1/3-1/5) of that in an equivalent tokamak. These configurations have strong magnetic wells and consequently high interchange stability beta limits up to beta=23%. Because of the reduced bootstrap current, these configurations are stable to low-n ideal MHD kink modes with no wall stabilization for values of beta ( approximately 7%-11%) significantly larger than in an equivalent advanced tokamak.

Published
2002
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