Search

Your search keyword '"Cirant S."' showing total 440 results
Start Over Author "Cirant S."
440 results on '"Cirant S."'

1. The Real-Time system for MHD activity control in the FTU tokamak

Author

Minelli D., Mellera V., Nardone A., Moro A., Lazzaro E., Iannone F., Grosso A., Granucci G., Garavaglia S., Figini L., Ferrero R., Farina D., Davoudi M., D’Arcangelo O., D’Antona G., Cirant S., Bruschi A., Botrugno A., Bin W., Nowak S., Marchetto C., Galperti C., Boncagni L., Alessi E., Sozzi C., Panella M., Piergotti V., Platania P., Ramponi G., Simonetto A., Tilia B., Vitale E., and Tudisco O.

Subjects
Physics, QC1-999
Abstract

The Real-Time system for the control of the magnetohydrodynamics instabilities in FTU tokamak is presented. It is based on both a-priori information derived from statistical treatment of a database and Real-Time elaboration of live diagnostics data. The analysis codes are executed in different time threads based on multi-processors machines. The actuator is the 2×0.4MW 140 GHz ECRH system equipped with the new fast quasi-optical steerable launcher.

Published
2012
Full Text
View/download PDF

2. In vessel characterization and first power tests on plasma of the Real-Time controllable EC launcher on FTU Tokamak

Author

Nardone A., Muzzini V., Minelli D., Mellera V., Grosso G., Granucci G., Garavaglia S., Galperti C., Figini L., Ferrero R., Farina D., Davoudi M., D’Arcangelo O., D’Antona G., Cirant S., Bruschi A., Boncagni L., Bin W., Artaserse G., Alessi E., Moro A., Nowak S., Ramogida G., Simonetto A., and Sozzi C.

Subjects
Physics, QC1-999
Abstract

The Electron Cyclotron (EC) fast launcher for real time control experiments has been installed on FTU and characterized to be fully integrated in a real-time MHD control module under development. The launcher scheme is based on a two module system, symmetric with respect to the equatorial plane of FTU, with a front steering concept and the launched beams are real-time controllable both in poloidal and toroidal directions. Specific design parameters, defined by the FTU MHD dynamics (typically island size and q profile changes), are the beam dimensions with zooming capabilities, the steering range and mirror speed with the most demanding requirement on poloidal speed of the Steering Mirror (SM) Δθ = 1° in 10 ms. A set of tests has been done to verify the system performance. High power tests of the launcher have been done on a 500 kA, 0.5·1020m−3 and 5.3 T plasma with 2·300 kW of EC power delivered to the plasma. The steering mechanism was tested under the automatic control system and showed a dynamic response in line with the requirements. Results of these tests will be presented in the paper.

Published
2012
Full Text
View/download PDF

3. Fast elaboration of diagnostic data for real time control in FTU tokamak

Author

Nowak S., Marchetto C., Galperti C., Cirant S., Botrugno A., Boncagni L., Alessi E., Sozzi C., and Tudisco O.

Subjects
Physics, QC1-999
Abstract

The automatic controller developed for MHD instability control on FTU via the real time (RT) EC launcher [1, 2] is based on the a-priori estimate of the instabilities location and on the fast elaboration of the stream of diagnostic data. A fast data acquisition system, based on existing standard FTU diagnostics, collects thermal and magnetic signals by a 12-channels ECE polychromator [3] and by a set of 22 Mirnov coils respectively. Moreover, the EC time waveform from directional couplers along the transmission line is acquired as well. This set of signals is processed in a timescale significantly shorter than the typical time step of the controller (1ms). RT elaboration algorithms aim at supplying the controller [4] with reliable information about the existence and the spatial location of the instability and about the actual ECRH deposition layer in plasma. The main algorithms blocks are ECE-ECE, ECE-Mirnov and ECE-ECRH cross-correlation, and SVD (Singular Value Decomposition) of Mirnov signals. The capabilities of effective detection, false positive resilience, and mode discrimination will be discussed through the application to actual plasma data.

Published
2012
Full Text
View/download PDF

5. Overview of the ITER EC H&CD system and its capabilities

Author

Omori, T., Henderson, M.A., Albajar, F., Alberti, S., Baruah, U., Bigelow, T.S., Beckett, B., Bertizzolo, R., Bonicelli, T., Bruschi, A., Caughman, J.B., Chavan, R., Cirant, S., Collazos, A., Cox, D., Darbos, C., de Baar, M.R., Denisov, G., Farina, D., Gandini, F., Gassmann, T., Goodman, T.P., Heidinger, R., Hogge, J.P., Illy, S., Jean, O., Jin, J., Kajiwara, K., Kasparek, W., Kasugai, A., Kern, S., Kobayashi, N., Kumric, H., Landis, J.D., Moro, A., Nazare, C., Oda, Y., Pagonakis, I., Piosczyk, B., Platania, P., Plaum, B., Poli, E., Porte, L., Purohit, D., Ramponi, G., Rao, S.L., Rasmussen, D.A., Ronden, D.M.S., Rzesnicki, T., Saibene, G., Sakamoto, K., Sanchez, F., Scherer, T., Shapiro, M.A., Sozzi, C., Spaeh, P., Strauss, D., Sauter, O., Takahashi, K., Temkin, R.J., Thumm, M., Tran, M.Q., Udintsev, V.S., and Zohm, H.

Published
2011
Full Text
View/download PDF

8. Conceptual design of the ECH upper launcher system for ITER

Author

Heidinger, R., Bertizzolo, R., Bruschi, A., Chavan, R., Cirant, S., Collazos, A., de Baar, M., Elzendoorn, B., Farina, D., Fischer, U., Gafert, J., Gandini, F., Gantenbein, G., Goede, A., Goodman, T., Hailfinger, G., Henderson, M., Kasparek, W., Kleefeldt, K., Landis, J.-D., Meier, A., Moro, A., Platania, P., Poli, E., Ramponi, G., Saibene, G., Sanchez, F., Sauter, O., Scherer, T., Serikov, A., Shidara, H., Sozzi, C., Spaeh, P., Strauss, D., Udintsev, V.S., Vaccaro, A., Zohm, H., and Zucca, C.

Published
2009
Full Text
View/download PDF

9. Diplexers for power combination and switching in high power ECRH systems

Author

Bruschi, A., Erckmann, V., Kasparek, W., Petelin, M.I., Thumm, M., Bin, W., Cirant, S., D'Arcangelo, O., Hollmann, F., Lubyako, L., Noke, F., Plaum, B., Purps, F., and Zohm, H.

Subjects
Antennas (Electronics) -- Design and construction, Cyclotron -- Usage, Phase modulation -- Analysis, Business, Chemistry, Electronics, Electronics and electrical industries
Published
2010

14. Design of the remote-steering ITER ECRH upper-port launcher

Author

Verhoeven, A.G.A., Bongers, W.A., Bruschi, A., Cirant, S., Danilov, I., Elzendoorn, B.S.Q., Fernández, Á., Graswinckel, M.F., Heidinger, R., Henderson, M., Jamar, J., Kasparek, W., Kruijt, O.G., Lamers, B., Plaum, B., Ronden, D.M.S., Saibene, G., Schüller, F.C., Westerhof, E., and Zohm, H.

Published
2007
Full Text
View/download PDF

15. EU developments of the ITER ECRH system

Author

Henderson, M.A., Alberti, S., Benin, P., Bonicelli, T., Chavan, R., Campbell, D., Cirant, S., Dammertz, G., Dormicchi, O., Dumbrajs, O., Fasel, D., Goodman, T.P., Heidinger, R., Hogge, J.-P., Kasparek, W., Lievin, C., Piosczyk, B., Poli, E., Ramponi, G., Saibene, G., Sauter, O., Serikov, A., Taddia, G., Thumm, M., Tran, M.Q., Verhoeven, A.G.A., and Zohm, H.

Published
2007
Full Text
View/download PDF

21. New millimeter-wave access for JET reflectometry and ECE

Author

Cupido, L., Luna, E. de la, Antonucci, C., Guigon, A., van Amerongen, F.J., Bongers, W.A., Donné, A.J.H., Graswinckel, M.F., Bruschi, A., Cirant, S., Simonetto, A., Sozzi, C., Wagner, D., Manso, E., Meneses, L., Silva, F., Varela, P., Balshaw, N., Chareau, J.M., Conway, G., Fessey, J., Hanks, S., Pearce, R., Ricardo, V., Sands, D., Starky, D., and Tisconia, T.

Published
2005
Full Text
View/download PDF

24. Design and R&D of an ECRH system on JET

Author

Verhoeven, A.G.A., Bongers, W.A., Elzendoorn, B.S.Q., Graswinckel, M., Hellingman, P., Kooijman, W., Kruijt, O.G., Maagdenberg, J., Ronden, D., Stakenborg, J., Sterk, A.B., Tichler, J., Alberti, S., Henderson, M., Hoekzema, J.A., Fernandez, A., Likin, K., Bruschi, A., Cirant, S., Novak, S., Piosczyk, B., Thumm, M., Guigon, A., Damiani, C., Pamela, J., Kaye, A., Fleming, C., and Zohm, H.

Published
2003
Full Text
View/download PDF

34. An overview of the ITER electron cyclotron H&CD system

Author

Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Plasma Science and Fusion Center, Temkin, Richard J., Temkin, Richard J, Henderson, M., Albajar, F., Alberti, S., Baruah, U., Bigelow, T., Becket, B., Bertizzolo, R., Bonicelli, T., Bruschi, A., Caughman, J., Chavan, R., Cirant, S., Collazos, A., Darbos, C., de Baar, M., Denisov, G., Farina, D., Gandini, F., Gassman, T., Goodman, T. P., Heidinger, R., Hogge, J. P., Jean, O., Kajiwara, K., Kasparek, W., Kasugai, A., Kern, S., Kobayashi, N., Landis, J. D., Moro, A., Nazare, C., Oda, J., Paganakis, I., Platania, P., Plaum, B., Poli, E., Porte, L., Pioscyzyk, B., Ramponi, G., Rao, S. L., Rasmussen, D., Ronden, D., Saibene, G., Sakamoto, K., Sanchez, F., Scherer, T., Shapiro, M., Sozzi, C., Spaeh, P., Straus, D., Sauter, O., Takahashi, K., Tanga, A., Thumm, M., Tran, M. Q., Zohm, H., Zucca, C., Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Plasma Science and Fusion Center, Temkin, Richard J., Temkin, Richard J, Henderson, M., Albajar, F., Alberti, S., Baruah, U., Bigelow, T., Becket, B., Bertizzolo, R., Bonicelli, T., Bruschi, A., Caughman, J., Chavan, R., Cirant, S., Collazos, A., Darbos, C., de Baar, M., Denisov, G., Farina, D., Gandini, F., Gassman, T., Goodman, T. P., Heidinger, R., Hogge, J. P., Jean, O., Kajiwara, K., Kasparek, W., Kasugai, A., Kern, S., Kobayashi, N., Landis, J. D., Moro, A., Nazare, C., Oda, J., Paganakis, I., Platania, P., Plaum, B., Poli, E., Porte, L., Pioscyzyk, B., Ramponi, G., Rao, S. L., Rasmussen, D., Ronden, D., Saibene, G., Sakamoto, K., Sanchez, F., Scherer, T., Shapiro, M., Sozzi, C., Spaeh, P., Straus, D., Sauter, O., Takahashi, K., Tanga, A., Thumm, M., Tran, M. Q., Zohm, H., and Zucca, C.

Abstract

This paper reviews the design and functionality of the 24 MW 170 GHz electron cyclotron heating and current drive system being planned for the ITER Tokamak. The sub-systems (power supplies, gyrotrons, transmission lines and launcher antennas) are described based on present day technologies, while on-going R&D provides component and sub-system testing with the possibility of increasing the reliability of the overall EC system. Modifications to the steering ranges of the launching antennas are under investigation that can improve the functional capabilities of the EC system without increasing cost and relaxing the engineering constraints.

Published
2017

35. Matched calorimetric loads for high power millimeter-wave gyrotrons

Author

Bruschi, A, Muzzini, V, Spinicchia, N, Benocci, R, Carcano, G, Cirant, S, Gandini, F, Gittini, G, Granucci, G, Leuterer, F, Mellera, V, Monaco, F, Muenich, M, Nardone, A, Schuetz, H, Signorelli, E, Simonetto, A, Sozzi, C, Bruschi A., Muzzini V., Spinicchia N., Benocci R., Carcano G., Cirant S., Gandini F., Gittini G., Granucci G., Leuterer F., Mellera V., Monaco F., Muenich M., Nardone A., Schuetz H., Signorelli E., Simonetto A., Sozzi C., Bruschi, A, Muzzini, V, Spinicchia, N, Benocci, R, Carcano, G, Cirant, S, Gandini, F, Gittini, G, Granucci, G, Leuterer, F, Mellera, V, Monaco, F, Muenich, M, Nardone, A, Schuetz, H, Signorelli, E, Simonetto, A, Sozzi, C, Bruschi A., Muzzini V., Spinicchia N., Benocci R., Carcano G., Cirant S., Gandini F., Gittini G., Granucci G., Leuterer F., Mellera V., Monaco F., Muenich M., Nardone A., Schuetz H., Signorelli E., Simonetto A., and Sozzi C.

Abstract

High power gyrotron testing at long pulses is a necessary step in the development of mm-wave systems for fusion research. For this purpose a compact calorimetric load is being developed, with low overall reflectivity (< 5%) and aiming at 1 MW-CW capabilities, after the good performances of the loads (0.5 MW, 0.5 s per pulse) installed on the 140 GHz ECRH plant of the FTU Tokamak in Frascati. Tests at the same frequency but at higher power (0.7 MW, 1 s) and longer pulses (up to 2 s at 0.5 MW) on the ASDEX-Upgrade ECRH plant showed, after repeated exposures, damages on the absorbing layer, recognized as thermal effects due to the local enhancement of incident power: the effects visible near the entrance port are explained studying the superposition (with interference) of waves reflected inside the sphere. Samples of degraded and non-degraded coating have been analyzed with various techniques, revealing changes of the substrate's physical characteristics. Measurements of absorber temperature during and after the pulse, performed with an infrared detector looking directly into the load, allowed estimates of the peak temperature and thermal properties of the coating in the real working conditions. Improvements on power deposition, geometry and cooling are proposed, to be integrated in a new load design. (C) 2003 Elsevier Science B.V. All rights reserved.

Published
2003

37. The Thor tokamak experiment

Author

Argenti, D., Bonizzoni, G., Cirant, S., Corti, S., Grosso, G., Lampis, G., Rossi, L., Carretta, U., Jacchia, A., De Luca, F., and Fontanesi, M.

Published
1981
Full Text
View/download PDF

39. First Operations of the Real-Time ECRH/ECCD System for Control of Magnetohydrodynamics Instabilities in the FTU Tokamak

Author

Sozzi C., Alessi E., Boncagni L., Galperti C., Marchetto C., Nowak S., Apruzzese G., Bin W., Belli F., Botrugno A., Bruschi A., Buratti P., Cirant S., D'Antona G., D'Arcangelo O., Davoudi M., Farina D., Figini L., Ferrero R., Gabellieri L., Garavaglia S., Granucci G., Grosso A., Iannone F., Lazzaro E., Moro A., Mellera V., Minelli D., Panella M., Platania P., Ramogida G., Ramponi G., Simonetto A., Tilia B., Vitale V., and Tudisco O.

Subjects
____
Abstract

____

Published
2012

40. Present Status of the 24 MW, 170 GHz ITER EC H&CD system

Author

Henderson M. A., Albajar F., Alberti S., Baruah U., Bigelow T., Becket B., Bertizzolo R., Bonicelli T., Bruschi A., Caughman J., Chavan R., Cirant S., Darbos C., de Baar M., Denisov G., Farina D., Gandini F., Gassman T., Goodman T.P. Heidinger R., Hogge J.P., Kajiwara K., Kasparek W., Kasugai A., Kern S., Kobayashi N., Landis J.D., LitvaK A., Moro A., Myasnikov V., Nazare C., Oda Y., Omori T., Pagonakis I., Parmar D., Peters B., Platania P, Plaum B., Poli E., Porte L., Piosczyk B., Purohit D., Ramponi G., Rao S. L., Rasmussen D., Ronden D., Saibene G., Sakamoto K., Sanchez F., Scherer T., Schreck S., Singh N.P., Shapiro M., Sozzi C., Spaeh P., Strauss D., Sauter O., Tai E., Takahashi K., Temkin R., Thomas P.., Thumm M., and Zohm H.

Subjects
____
Abstract

___

Published
2011

45. Overview of the FTU results

Author

Pucella, G., primary, Alessi, E., additional, Amicucci, L., additional, Angelini, B., additional, Apicella, M.L., additional, Apruzzese, G., additional, Artaserse, G., additional, Barbato, E., additional, Belli, F., additional, Bertocchi, A., additional, Bin, W., additional, Boncagni, L., additional, Botrugno, A., additional, Briguglio, S., additional, Bruschi, A., additional, Buratti, P., additional, Calabrò, G., additional, Cardinali, A., additional, Castaldo, C., additional, Causa, F., additional, Ceccuzzi, S., additional, Centioli, C., additional, Cesario, R., additional, Cianfarani, C., additional, Cocilovo, V., additional, Crisanti, F., additional, D'Arcangelo, O., additional, De Angeli, M., additional, De Angelis, R., additional, Di Troia, C., additional, Esposito, B., additional, Farina, D., additional, Figini, L., additional, Fogaccia, G., additional, Frigione, D., additional, Fusco, V., additional, Gabellieri, L., additional, Galperti, C., additional, Garavaglia, S., additional, Giovannozzi, E., additional, Granucci, G., additional, Iannone, F., additional, Lontano, M., additional, Maddaluno, G., additional, Marchetto, C., additional, Marinucci, M., additional, Marocco, D., additional, Mazzitelli, G., additional, Mazzotta, C., additional, Milovanov, A., additional, Minelli, D., additional, Mirizzi, F.C., additional, Moro, A., additional, Nowak, S., additional, Orsitto, F.P., additional, Pacella, D., additional, Panaccione, L., additional, Panella, M., additional, Pericoli-Ridolfini, V., additional, Pizzuto, A., additional, Podda, S., additional, Ramogida, G., additional, Ravera, G., additional, Romano, A., additional, Sozzi, C., additional, Tuccillo, A.A., additional, Tudisco, O., additional, Viola, B., additional, Vitale, E., additional, Vlad, G., additional, Zanza, V., additional, Zerbini, M., additional, Zonca, F., additional, Aquilini, M., additional, Cefali, P., additional, Di Ferdinando, E., additional, Di Giovenale, S., additional, Giacomi, G., additional, Grosso, A., additional, Mellera, V., additional, Mezzacappa, M., additional, Pensa, A., additional, Petrolini, P., additional, Piergotti, V., additional, Raspante, B., additional, Rocchi, G., additional, Sibio, A., additional, Tilia, B., additional, Tulli, R., additional, Vellucci, M., additional, Zannetti, D., additional, Almaviva, S., additional, Canal, G., additional, Caneve, L., additional, Carnevale, D., additional, Cavinato, M., additional, Cirant, S., additional, Colao, F., additional, Crescenzi, F., additional, Duval, B., additional, Fantoni, R., additional, Federspiel, L., additional, Galeani, S., additional, Grosso, G., additional, Jakubowski, L., additional, Karpushov, A., additional, Kim, D., additional, Lazzaro, E., additional, Lyublinski, I., additional, Malinowski, K., additional, Martin-Solis, J.R., additional, Maviglia, F., additional, Mosconi, M., additional, Popovic, Z., additional, Rabinski, M., additional, Reale, M., additional, Reimerdes, H., additional, Ricci, D., additional, Riva, M., additional, Roccella, S., additional, Rossel, J., additional, Sadowski, M.J., additional, Sassano, M., additional, Sauter, O., additional, Testa, D., additional, Vertkov, A., additional, Wagner, D., additional, and Zebrowski, J., additional

Published
2015
Full Text
View/download PDF

46. Status of the ITER Electron Cyclotron H&CD System

Author

Darbos C., Albajar F., Alberti S., Bruschi A., Cirant S., Farina D., Moro A., Platania P., Ramponi G., and Sozzi C.

Subjects
ITER, Electron Cyclotron, Plasma physics
Abstract

_

Published
2010

47. Density response to modulated EC Heating in FTU Tokamak

Author

Jacchia A., Cirant S., De Luca F., Buratti P., Lazzaro E., Tudisco O., Mazzotta C., Calabrò G., Ramogida G., Cianfarani C., Marocco D., Grossetti G., Granucci G., D'Arcangelo O., Bin W., FTU, and ECRH team

Subjects
____
Abstract

____

Published
2010

48. An overview of the ITER ECH&CD system and functional capabilities

Author

Henderson M.A., Albajar F., Alberti S., Baruah U., Bigelow T., Becket B., Bertizzolo R., Bonicelli T., Bruschi A., Caughman J., Chavan R., Cirant S., Collazos A., Cox A., Darbos C., de Baar M., Denisov G., Farina D., Gandini F., Gassman T., Goodman T.P. Heidinger R., Hogge J.P., Illy S., Jean O., Jin J., Kajiwara K., Kasparek W., Kasugai A., Kern S., Kobayashi N., Kumric H., Landis J.D., Moro A., Nazare C., Oda Y., Omori T., Paganakis I., Piosczyk B., Platania P., Plaum B., Poli E., Porte L., Purohit D., Ramponi G., Rzesnicki T., Rao S.L., Rasmussen D., Ronde D., Saibene G., Sakamoto K., Sanchez F., Scherer T., Shapiro M., Sozzi C., Spaeh P., Strauss D., Sauter O., Takahashi K., Tanga A., Temkin R., Thumm M., Tran M.Q., Udintsev V.S., Zohm H., and Zucca C.

Subjects
____
Abstract

Articolo numero ITR/P1-10

Published
2010

Catalog

Books, media, physical & digital resources
See catalog results