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41 to 50 of 570 Results

Learning Plasma Dynamics and Robust Rampdown Trajectories with Predict-First Experiments at TCV May 31, 2025 Allen M. Wang, Alessandro Pau, Cristina Rea, Oswin So, Charles Dawson, Olivier Sauter, Mark D. Boyer, Anna Vu, Cristian Galperti, Chuchu Fan, Antoine Merle, Yoeri Poels, Cristina Venturini, Stefano Marchioni, and the TCV Team, 2025, "Learning Plasma Dynamics and Robust Rampdown Trajectories with Predict-First Experiments at TCV", https://doi.org/10.7910/DVN/MX50AU, Harvard Dataverse, V1 The rampdown in tokamak operations is a difficult to simulate phase during which the plasma is often pushed towards multiple instability limits. To address this challenge, and reduce the risk of disrupting operations, we leverage recent advances in Scientific Machine Learning (SciML) to develop a neural state-space model (NSSM) that predicts plasma...
A surface-shunting method for the prevention of a fault-mode-induced quench in high-field no-insulation REBCO magnets May 29, 2025 Dong, Fangliang; Park, Dongkeun; Kim, Junseong; Bascuñán, Juan; Iwasa, Yukikazu, 2025, "A surface-shunting method for the prevention of a fault-mode-induced quench in high-field no-insulation REBCO magnets", https://doi.org/10.7910/DVN/CVZ9RQ, Harvard Dataverse, V1, UNF:6:rQ+9PRgNhYdVbsIVfksWgg== [fileUNF] In this paper, we apply a surface-shunting method to prevent quenches in no-insulation (NI) REBCO magnets triggered by external failures of magnet current leads or power suppliers (i.e., fault mode). In a high-field magnet system, an NI coil may still be at risk during the mentioned quench events even if the whole magnet is well-designed, non-defec...
First measurement in a magnetic confinement fusion experiment of the T + T → 5He + n intermediate two-body resonant reaction May 28, 2025 B. Eriksson, S. Conroy, G. Ericsson, J. Eriksson, A. Hjalmarsson, C. R. Brune, M. Gatu Johnson, M. Nocente, S. Fugazza, M. Rebai, Jet contributors, 2024, "First measurement in a magnetic confinement fusion experiment of the T + T → 5He + n intermediate two-body resonant reaction", https://doi.org/10.7910/DVN/MCVSYQ, Harvard Dataverse, V2 We report on the first experimental measurements made at a magnetic confinement fusion device of the tritium(T)-tritium(T) reaction T + T → 4He + 2n indicating the presence of the intermediate two-body resonant reaction T + T → 5He+n. During the second deuterium-tritium campaign (DTE2) at the Joint European Torus, measurements of fusion plasmas wit...
Highly Efficient Superconducting Diodes and Rectifiers for Quantum Circuitry May 14, 2025 Josep Ingla-Aynés, Yasen Hou, Sarah Wang, En-De Chu, Oleg A. Mukhanov, Peng Wei, Jagadeesh S. Moodera, 2025, "Highly Efficient Superconducting Diodes and Rectifiers for Quantum Circuitry", https://doi.org/10.7910/DVN/BSAD8L, Harvard Dataverse, V7 Superconducting electronics is essential for energy-efficient quantum and classical high-end computing applications. Towards this goal, non-reciprocal superconducting circuit elements, such as superconducting diodes (SDs) can fulfill many critical needs. SDs have been the subject of multiple studies, but integrating several SDs in a superconducting...
The National Direct-Drive Inertial Confinement Fusion Program May 5, 2025 Regan, S.P.; Goncharov, V.N.; Sangster, T.C.; Campbell, E.M.; Betti, R.; Bates, J.W.; Bauer, K.; Bernat, T.; Bhandarkar, S.; Boehly, T.R.; Bonino, M.J.; Bose, A.; Cao, D.; Carlson, L.; Chapman, R.; Chapman, T.; Collins, G.W.; Collins, T.J.B.; Craxton, R.S.; Delettrez, J.A.; Edgell, D.H.; Epstein, R.; Farrell, M.; Forrest, C.J.; Follett, R.K.; Frenje, J.A.; Froula, D.H.; Johnson, M.G.; Gibson, C.R.; Gonzalez, L.; Goyon, C.; Glebov, V.Yu.; Gopalaswamy, V.; Greenwood, A.; Harding, D.R.; Hohenberger, M.; Hu, S.X.; Huang, H.; Hund, J.; Igumenshchev, I.V.; Jacobs Perkins, D.W.; Janezic, R.T.; Karasik, M.; Kelly, J.H.; Kessler, T.J.; Knauer, J.P.; Kosc, T.Z.; Luo, R.; Loucks, S.J.; Marozas, J.A.; Marshall, F.J.; Mauldin, M.; McCrory, R.L.; Mckenty, P.W.; Michel, D.T.; Michel, P.; Moody, J.D.; Myatt, J.F.; Nikroo, A.; Nilson, P.M.; Obenschain, S.P.; Palastro, J.P.; Peebles, J.; Petrasso, R.D.; Petta, N.; Radha, P.B.; Ralph, J.E.; Rosenberg, M.J.; Sampat, S.; Schmitt, A.J.; Schmitt, M.J.; Schoff, M.; Seka, W.; Shah, R.; Rygg, J.R.; Shaw, J.G.; Short, R.; Shmayda, W.T.; Shoup, M.J., III; Shvydky, A.; Solodov, A.A.; Sorce, C.; Stadermann, M.; Stoeckl, C.; Sweet, W.; Taylor, C.; Taylor, R.; Theobald, W.; Turnbull, D.P.; Ulreich, J.; Wittman, M.D.; Woo, K.M.; Youngblood, K.; Zuegel, J.D., 2025, "The National Direct-Drive Inertial Confinement Fusion Program", https://doi.org/10.7910/DVN/QHTSAA, Harvard Dataverse, V1 The National Direct-Drive Inertial Confinement Fusion Program consists of the 100-Gbar Campaign on the 30-kJ, 351-nm, 60-beam OMEGA Laser System and the MegaJoule Direct Drive (MJDD) Campaign on the 1.8-MJ, 351-nm, 192-beam National Ignition Facility (NIF). The main goals of the 100-Gbar Campaign are to demonstrate and understand the physics for ho...
Development of a platform for experimental and computational studies of magnetic and radiative effects on astrophysically relevant jets at OMEGA Apr 26, 2025 G. Rigon, C. Stoeckl, T. M. Johnson, J. Katz, J. Peebles, C. K. Li, 2024, "Development of a platform for experimental and computational studies of magnetic and radiative effects on astrophysically relevant jets at OMEGA", https://doi.org/10.7910/DVN/8B54XT, Harvard Dataverse, V2 Accurate modeling of astrophysical jets is critical for understanding accretion systems and their impact on the interstellar medium. While astronomical observations can validate models, they have limitations. Controlled laboratory experiments offer a complementary approach for qualitative and quantitative demonstration. Laser experiments offer a co...
Distortions in charged-particle images of laser direct-drive inertial confinement fusion implosions Apr 7, 2025 P. V. Heuer, J. L. Peebles, J. Kunimune, H. G. Rinderknecht, J. R. Davies, V. Gopalaswamy, J. Frelier, M. Scott, J. Roberts, R. B. Brannon, H. McClow, R. Fairbanks, S. P. Regan, J. A. Frenje, M. Gatu Johnson, F. H. Seguin, A. J. Crilly, B. D. Appelbe, M. Farrell, J. Stutz, 2025, "Distortions in charged-particle images of laser direct-drive inertial confinement fusion implosions", https://doi.org/10.7910/DVN/2RQIUR, Harvard Dataverse, V1 Energetic charged particles generated by inertial confinement fusion (ICF) implosions encode information about the spatial morphology of the hotspot and dense fuel during the time of peak fusion reactions. The knock-on deuteron imager (KoDI) was developed at the Omega Laser Facility to image these particles in order to diagnose low-mode asymmetries...
Progress toward hydro-equivalent ignition in OMEGA directdrive DT-layered implosions Mar 31, 2025 L. Ceurvorst; R. Betti; V. Gopalaswamy; A. Lees ; J. P. Knauer; M. J. Rosenberg ; D. Patel ; R. Ejaz ; C. A. Williams ; K. M. Woo ; P. S. Farmakis ; D. Cao ; C. A. Thomas ; I. V. Igumenshchev; K. S. Anderson ; T. J. B. Collins ; R. Epstein ; A. A. Solodov ; C. J. Forrest ; C. Stoeckl ; R. C. Shah ; V. Yu. Glebov ; H. McClow; V. N. Goncharov ; R. K. Follett ; D. Turnbull ; K. Churnetski ; D. H. Froula ; S. P. Regan ; R. T. Janezic; C. Fella; M. W. Koch; W. T. Shmayda ; M. J. Bonino; D. R. Harding; S. Sampat; K. A. Bauer ; S. F. B. Morse ; M. Gatu Johnson ; C. Wink ; R. D. Petrasso ; C. K. Li ; J. A. Fenje ; C. Shuldberg ; J. Murray; D. Guzman; B. Serrato; M. Farrell, 2025, "Progress toward hydro-equivalent ignition in OMEGA directdrive DT-layered implosions", https://doi.org/10.7910/DVN/IDFURL, Harvard Dataverse, V1 Considerable progress has been made in DT-layered implosion experiments on the OMEGA Laser System, bringing the possibility of thermonuclear ignition in direct-drive configurations with megajoule-class lasers closer to reality. Doing so has required navigating the balance between improved 1D performance and multidimensional stability. Using statist...
Biermann-battery driven magnetized collisionless shock precursors in laser produced plasmas Mar 31, 2025 T. M. Johnson, G. D. Sutcliffe, J. A. Pearcy, A. Birkel, G. Rigon, N. V. Kabadi, B. Lahmann, P. J. Adrian, B. L. Reichelt, J. H. Kunimune, S. G. Dannhoff, M. Cufari, C. K. Li, F. Tsung, H. Chen, J. Katz, V. T. Tikhonchuk, 2025, "Biermann-battery driven magnetized collisionless shock precursors in laser produced plasmas", https://doi.org/10.7910/DVN/TSBGFU, Harvard Dataverse, V1 This letter reports the first complete observation of magnetized collisionless shock precursors formed through the compression of Biermann-battery magnetic fields in laser produced plasmas. At OMEGA, lasers produce a supersonic CH plasma flow which is magnetized with Biermann-battery magnetic fields. The plasma flow collides with an unmagnetized hy...
Kinetic-Ballooning-Bifurcation in Tokamak Pedestals Across Shaping and Aspect-Ratio Mar 21, 2025 J. F. Parisi, A. O. Nelson, R. Gaur, S. M. Kaye, F. I. Parra, J. W. Berkery, K. Barada, C. Clauser, A. J. Creely, A. Diallo, W. Guttenfelder, J. W. Hughes, L. A. Kogan, A. Kleiner, A. Q. Kuang, M. Lampert, T. Macwan, J. E. Menard, M. A. Miller, 2024, "Kinetic-Ballooning-Bifurcation in Tokamak Pedestals Across Shaping and Aspect-Ratio", https://doi.org/10.7910/DVN/KCQPKI, Harvard Dataverse, V2 We use a new gyrokinetic threshold model to predict a bifurcation in tokamak pedestal width-height scalings that depends strongly on plasma shaping and aspect-ratio. The bifurcation arises from the first and second stability properties of kinetic-ballooning-modes that yields wide and narrow pedestal branches, expanding the space of accessible pedes...

Learning Plasma Dynamics and Robust Rampdown Trajectories with Predict-First Experiments at TCV

May 31, 2025

Allen M. Wang, Alessandro Pau, Cristina Rea, Oswin So, Charles Dawson, Olivier Sauter, Mark D. Boyer, Anna Vu, Cristian Galperti, Chuchu Fan, Antoine Merle, Yoeri Poels, Cristina Venturini, Stefano Marchioni, and the TCV Team, 2025, "Learning Plasma Dynamics and Robust Rampdown Trajectories with Predict-First Experiments at TCV", https://doi.org/10.7910/DVN/MX50AU, Harvard Dataverse, V1

The rampdown in tokamak operations is a difficult to simulate phase during which the plasma is often pushed towards multiple instability limits. To address this challenge, and reduce the risk of disrupting operations, we leverage recent advances in Scientific Machine Learning (SciML) to develop a neural state-space model (NSSM) that predicts plasma...

A surface-shunting method for the prevention of a fault-mode-induced quench in high-field no-insulation REBCO magnets

May 29, 2025

Dong, Fangliang; Park, Dongkeun; Kim, Junseong; Bascuñán, Juan; Iwasa, Yukikazu, 2025, "A surface-shunting method for the prevention of a fault-mode-induced quench in high-field no-insulation REBCO magnets", https://doi.org/10.7910/DVN/CVZ9RQ, Harvard Dataverse, V1, UNF:6:rQ+9PRgNhYdVbsIVfksWgg== [fileUNF]

In this paper, we apply a surface-shunting method to prevent quenches in no-insulation (NI) REBCO magnets triggered by external failures of magnet current leads or power suppliers (i.e., fault mode). In a high-field magnet system, an NI coil may still be at risk during the mentioned quench events even if the whole magnet is well-designed, non-defec...

First measurement in a magnetic confinement fusion experiment of the T + T → 5He + n intermediate two-body resonant reaction

May 28, 2025

B. Eriksson, S. Conroy, G. Ericsson, J. Eriksson, A. Hjalmarsson, C. R. Brune, M. Gatu Johnson, M. Nocente, S. Fugazza, M. Rebai, Jet contributors, 2024, "First measurement in a magnetic confinement fusion experiment of the T + T → 5He + n intermediate two-body resonant reaction", https://doi.org/10.7910/DVN/MCVSYQ, Harvard Dataverse, V2

We report on the first experimental measurements made at a magnetic confinement fusion device of the tritium(T)-tritium(T) reaction T + T → 4He + 2n indicating the presence of the intermediate two-body resonant reaction T + T → 5He+n. During the second deuterium-tritium campaign (DTE2) at the Joint European Torus, measurements of fusion plasmas wit...

Highly Efficient Superconducting Diodes and Rectifiers for Quantum Circuitry

May 14, 2025

Josep Ingla-Aynés, Yasen Hou, Sarah Wang, En-De Chu, Oleg A. Mukhanov, Peng Wei, Jagadeesh S. Moodera, 2025, "Highly Efficient Superconducting Diodes and Rectifiers for Quantum Circuitry", https://doi.org/10.7910/DVN/BSAD8L, Harvard Dataverse, V7

Superconducting electronics is essential for energy-efficient quantum and classical high-end computing applications. Towards this goal, non-reciprocal superconducting circuit elements, such as superconducting diodes (SDs) can fulfill many critical needs. SDs have been the subject of multiple studies, but integrating several SDs in a superconducting...

The National Direct-Drive Inertial Confinement Fusion Program

May 5, 2025

Regan, S.P.; Goncharov, V.N.; Sangster, T.C.; Campbell, E.M.; Betti, R.; Bates, J.W.; Bauer, K.; Bernat, T.; Bhandarkar, S.; Boehly, T.R.; Bonino, M.J.; Bose, A.; Cao, D.; Carlson, L.; Chapman, R.; Chapman, T.; Collins, G.W.; Collins, T.J.B.; Craxton, R.S.; Delettrez, J.A.; Edgell, D.H.; Epstein, R.; Farrell, M.; Forrest, C.J.; Follett, R.K.; Frenje, J.A.; Froula, D.H.; Johnson, M.G.; Gibson, C.R.; Gonzalez, L.; Goyon, C.; Glebov, V.Yu.; Gopalaswamy, V.; Greenwood, A.; Harding, D.R.; Hohenberger, M.; Hu, S.X.; Huang, H.; Hund, J.; Igumenshchev, I.V.; Jacobs Perkins, D.W.; Janezic, R.T.; Karasik, M.; Kelly, J.H.; Kessler, T.J.; Knauer, J.P.; Kosc, T.Z.; Luo, R.; Loucks, S.J.; Marozas, J.A.; Marshall, F.J.; Mauldin, M.; McCrory, R.L.; Mckenty, P.W.; Michel, D.T.; Michel, P.; Moody, J.D.; Myatt, J.F.; Nikroo, A.; Nilson, P.M.; Obenschain, S.P.; Palastro, J.P.; Peebles, J.; Petrasso, R.D.; Petta, N.; Radha, P.B.; Ralph, J.E.; Rosenberg, M.J.; Sampat, S.; Schmitt, A.J.; Schmitt, M.J.; Schoff, M.; Seka, W.; Shah, R.; Rygg, J.R.; Shaw, J.G.; Short, R.; Shmayda, W.T.; Shoup, M.J., III; Shvydky, A.; Solodov, A.A.; Sorce, C.; Stadermann, M.; Stoeckl, C.; Sweet, W.; Taylor, C.; Taylor, R.; Theobald, W.; Turnbull, D.P.; Ulreich, J.; Wittman, M.D.; Woo, K.M.; Youngblood, K.; Zuegel, J.D., 2025, "The National Direct-Drive Inertial Confinement Fusion Program", https://doi.org/10.7910/DVN/QHTSAA, Harvard Dataverse, V1

The National Direct-Drive Inertial Confinement Fusion Program consists of the 100-Gbar Campaign on the 30-kJ, 351-nm, 60-beam OMEGA Laser System and the MegaJoule Direct Drive (MJDD) Campaign on the 1.8-MJ, 351-nm, 192-beam National Ignition Facility (NIF). The main goals of the 100-Gbar Campaign are to demonstrate and understand the physics for ho...

Development of a platform for experimental and computational studies of magnetic and radiative effects on astrophysically relevant jets at OMEGA

Apr 26, 2025

G. Rigon, C. Stoeckl, T. M. Johnson, J. Katz, J. Peebles, C. K. Li, 2024, "Development of a platform for experimental and computational studies of magnetic and radiative effects on astrophysically relevant jets at OMEGA", https://doi.org/10.7910/DVN/8B54XT, Harvard Dataverse, V2

Accurate modeling of astrophysical jets is critical for understanding accretion systems and their impact on the interstellar medium. While astronomical observations can validate models, they have limitations. Controlled laboratory experiments offer a complementary approach for qualitative and quantitative demonstration. Laser experiments offer a co...

Distortions in charged-particle images of laser direct-drive inertial confinement fusion implosions

Apr 7, 2025

P. V. Heuer, J. L. Peebles, J. Kunimune, H. G. Rinderknecht, J. R. Davies, V. Gopalaswamy, J. Frelier, M. Scott, J. Roberts, R. B. Brannon, H. McClow, R. Fairbanks, S. P. Regan, J. A. Frenje, M. Gatu Johnson, F. H. Seguin, A. J. Crilly, B. D. Appelbe, M. Farrell, J. Stutz, 2025, "Distortions in charged-particle images of laser direct-drive inertial confinement fusion implosions", https://doi.org/10.7910/DVN/2RQIUR, Harvard Dataverse, V1

Energetic charged particles generated by inertial confinement fusion (ICF) implosions encode information about the spatial morphology of the hotspot and dense fuel during the time of peak fusion reactions. The knock-on deuteron imager (KoDI) was developed at the Omega Laser Facility to image these particles in order to diagnose low-mode asymmetries...

Progress toward hydro-equivalent ignition in OMEGA directdrive DT-layered implosions

Mar 31, 2025

L. Ceurvorst; R. Betti; V. Gopalaswamy; A. Lees ; J. P. Knauer; M. J. Rosenberg ; D. Patel ; R. Ejaz ; C. A. Williams ; K. M. Woo ; P. S. Farmakis ; D. Cao ; C. A. Thomas ; I. V. Igumenshchev; K. S. Anderson ; T. J. B. Collins ; R. Epstein ; A. A. Solodov ; C. J. Forrest ; C. Stoeckl ; R. C. Shah ; V. Yu. Glebov ; H. McClow; V. N. Goncharov ; R. K. Follett ; D. Turnbull ; K. Churnetski ; D. H. Froula ; S. P. Regan ; R. T. Janezic; C. Fella; M. W. Koch; W. T. Shmayda ; M. J. Bonino; D. R. Harding; S. Sampat; K. A. Bauer ; S. F. B. Morse ; M. Gatu Johnson ; C. Wink ; R. D. Petrasso ; C. K. Li ; J. A. Fenje ; C. Shuldberg ; J. Murray; D. Guzman; B. Serrato; M. Farrell, 2025, "Progress toward hydro-equivalent ignition in OMEGA directdrive DT-layered implosions", https://doi.org/10.7910/DVN/IDFURL, Harvard Dataverse, V1

Considerable progress has been made in DT-layered implosion experiments on the OMEGA Laser System, bringing the possibility of thermonuclear ignition in direct-drive configurations with megajoule-class lasers closer to reality. Doing so has required navigating the balance between improved 1D performance and multidimensional stability. Using statist...

Biermann-battery driven magnetized collisionless shock precursors in laser produced plasmas

Mar 31, 2025

T. M. Johnson, G. D. Sutcliffe, J. A. Pearcy, A. Birkel, G. Rigon, N. V. Kabadi, B. Lahmann, P. J. Adrian, B. L. Reichelt, J. H. Kunimune, S. G. Dannhoff, M. Cufari, C. K. Li, F. Tsung, H. Chen, J. Katz, V. T. Tikhonchuk, 2025, "Biermann-battery driven magnetized collisionless shock precursors in laser produced plasmas", https://doi.org/10.7910/DVN/TSBGFU, Harvard Dataverse, V1

This letter reports the first complete observation of magnetized collisionless shock precursors formed through the compression of Biermann-battery magnetic fields in laser produced plasmas. At OMEGA, lasers produce a supersonic CH plasma flow which is magnetized with Biermann-battery magnetic fields. The plasma flow collides with an unmagnetized hy...

Kinetic-Ballooning-Bifurcation in Tokamak Pedestals Across Shaping and Aspect-Ratio

Mar 21, 2025

J. F. Parisi, A. O. Nelson, R. Gaur, S. M. Kaye, F. I. Parra, J. W. Berkery, K. Barada, C. Clauser, A. J. Creely, A. Diallo, W. Guttenfelder, J. W. Hughes, L. A. Kogan, A. Kleiner, A. Q. Kuang, M. Lampert, T. Macwan, J. E. Menard, M. A. Miller, 2024, "Kinetic-Ballooning-Bifurcation in Tokamak Pedestals Across Shaping and Aspect-Ratio", https://doi.org/10.7910/DVN/KCQPKI, Harvard Dataverse, V2

We use a new gyrokinetic threshold model to predict a bifurcation in tokamak pedestal width-height scalings that depends strongly on plasma shaping and aspect-ratio. The bifurcation arises from the first and second stability properties of kinetic-ballooning-modes that yields wide and narrow pedestal branches, expanding the space of accessible pedes...

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