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51. 105P Dynamic change in blood derived variant allele frequency as a predictive marker for response from checkpoint inhibitor based therapies among metastatic solid tumours

Author

Kato, S., primary, Li, B., additional, Cha, S.W., additional, Bianchi-Frias, D., additional, Kamei, N., additional, Hoiness, R., additional, Hoo, J., additional, Gray, P.N., additional, Iyama, T., additional, Kashiwagi, M., additional, Lu, H-M., additional, and Kurzrock, R., additional

Published
2020
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54. First operation in SPIDER and the path to complete MITICA

Author

Serianni, G., primary, Toigo, V., additional, Bigi, M., additional, Boldrin, M., additional, Chitarin, G., additional, Dal Bello, S., additional, Grando, L., additional, Luchetta, A., additional, Marcuzzi, D., additional, Pasqualotto, R., additional, Pomaro, N., additional, Zaccaria, P., additional, Zanotto, L., additional, Agostinetti, P., additional, Agostini, M., additional, Antoni, V., additional, Aprile, D., additional, Barbisan, M., additional, Battistella, M., additional, Brombin, M., additional, Canton, A., additional, Cavazzana, R., additional, Dalla Palma, M., additional, Dan, M., additional, Delogu, R., additional, De Lorenzi, A., additional, De Muri, M., additional, Denizeau, S., additional, Fadone, M., additional, Fellin, F., additional, Ferro, A., additional, Gaio, E., additional, Gambetta, G., additional, Gasparini, F., additional, Gnesotto, F., additional, Jain, P., additional, Maistrello, A., additional, Manduchi, G., additional, Manfrin, S., additional, Marchiori, G., additional, Marconato, N., additional, Moresco, M., additional, Patton, T., additional, Pavei, M., additional, Peruzzo, S., additional, Pilan, N., additional, Pimazzoni, A., additional, Piovan, R., additional, Poggi, C., additional, Recchia, M., additional, Rigoni, A., additional, Rizzolo, A., additional, Rostagni, G., additional, Sartori, E., additional, Siragusa, M., additional, Sonato, P., additional, Spada, E., additional, Spagnolo, S., additional, Spolaore, M., additional, Taliercio, C., additional, Tinti, P., additional, Ugoletti, M., additional, Valente, M., additional, Zamengo, A., additional, Zaniol, B., additional, Zaupa, M., additional, Cavenago, M., additional, Boilson, D., additional, Rotti, C., additional, Veltri, P., additional, Chareyre, J., additional, Decamps, H., additional, Dremel, M., additional, Graceffa, J., additional, Geli, F., additional, Schunke, B., additional, Svensson, L., additional, Urbani, M., additional, Bonicelli, T., additional, Agarici, G., additional, Garbuglia, A., additional, Masiello, A., additional, Paolucci, F., additional, Simon, M., additional, Bailly-Maitre, L., additional, Bragulat, E., additional, Gomez, G., additional, Gutierrez, D., additional, Labate, C., additional, Mico, G., additional, Moreno, J. F., additional, Pilard, V., additional, Kouzmenko, G., additional, Rousseau, A., additional, Chakraborty, A., additional, Baruah, U., additional, Patel, H., additional, Singh, N. P., additional, Patel, A., additional, Dhola, H., additional, Raval, B., additional, Cristofaro, S., additional, Fantz, U., additional, Heinemann, B., additional, Kraus, W., additional, Kashiwagi, M., additional, and Tobari, H., additional

Published
2020
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56. P91 Prognostic value of tissue-tracking mitral annular displacement by speckle-tracking echocardiography in asymptomatic patients with aortic stenosis with preserved left ventricular ejection fraction

Author

Teraguchi, I, primary, Hozumi, T, additional, Emori, H, additional, Takemoto, K, additional, Maniwa, N, additional, Kashiwagi, M, additional, Shimamura, K, additional, Shiono, Y, additional, Kuroi, A, additional, Matsuo, Y, additional, Ino, Y, additional, Kitabata, H, additional, Kubo, T, additional, Tanaka, A, additional, and Akasaka, T, additional

Published
2020
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57. P313 Prognostic value of automated measurement of mitral annular displacement by speckle-tracking echocardiography in asymptomatic aortic stenosis patients with preserved left ventricular ejection fraction

Author

Hozumi, T, primary, Teraguchi, I, additional, Takemoto, K, additional, Fujita, S, additional, Wada, T, additional, Kashiwagi, M, additional, Shimamura, K, additional, Shiono, Y, additional, Kuroi, A, additional, Matsuo, Y, additional, Ino, Y, additional, Kubo, T, additional, Tanaka, A, additional, and Akasaka, T, additional

Published
2020
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61. First operation in SPIDER and the path to complete MITICA

Author

Serianni G., Toigo V., Boilson D., Rotti C., Bonicelli T., Paolucci F., Chakraborty A., Kashiwagi M., Fantz U., the NBTF team, the contributing Staff of IO, F4E, IPR, QST, IPP, and other laboratories

Subjects
MITICA, NBIs, SPIDER
Abstract

To reach fusion conditions and to control the plasma configuration in ITER, the next step in thermonuclear fusion research, two heating and current-drive neutral beam injectors (NBIs) will supply 17MW each, by accelerating negative hydrogen or deuterium ions to 1MeV. The requirements of ITER NBIs (40A negative H or D ions for 1 hour) have never been simultaneously attained. So in the dedicated Neutral Beam Test Facility (NBTF) at Consorzio RFX (Italy) the performances of the ITER NBI (divergence

Published
2019

62. Progress of the ITER Neutral Beam Test Facility project

Author

Toigo V., Dal Bello S., Boilson D., Rotti C., Bonicelli T., Paolucci F., Chakraborty A., and Kashiwagi M.

Subjects
Neutral Beam Test Facility, ITER, NBTF, SPIDER
Abstract

This paper gives an overview of the progress of the Neutral Beam Test Facility realization, including the experimental status of SPIDER.

Published
2019

63. Achievement of DC 1 MV Insulation in High-Voltage Power Supply for ITER Neutral Beam Test Facility

Author

Kashiwagi M., Watanabe K., Maejima T., Yamashita Y., Boldrin M., Zanotto L., Dal Bello, S., Toigo V., Simon M., Escudero Gomez G., Paolucci F., Bonicelli T., and Decamps H.

Subjects
Neutral beam injector (NBI), ITER, NBTF, High-voltage power supply
Abstract

Toward the ITER neutral beam (NB) system operating at DC -1 MV, several insulating techniques with oil, gas (air, SF6) and in vacuum have been developed. For the NB Test Facility (NBTF) established in Padua (Italy), the DC 1 MV power supply (PS) components such as transformers, transmission line, HV Deck and HV bushing have been manufactured, installed and the on-site acceptance tests have started to ensure compliance with the ITER requirement in advance of the ITER. The 1 MV acceleration voltage to produce deuterium negative ion beams with 1 MeV, 40 A for 3600 sec is obtained with five-stage (200kV each) DC generator (transformer and rectifier) and transmitted to the beam source in a single SF6-gas insulated transmission line (pressurized tanks) with length of ~100 m. During the installation of the transmission line, increase of contact resistance at connection points of the inner conductor inside the transmission line were observed. For such a long component, the tanks cannot be closed just after connecting the conductor. Thus, exposure to the air for several months induced the increase of the contact resistance. To avoid an electric and thermal impact on high-current conductors, a recovery technique of the contact resistance without disconnection was investigated. Finally, most of PS component have been installed and the voltage holding test for each section of the PS system as the on-site acceptance test has started. In this paper, recent progress of voltage holding test of the ITER NBTF DC 1 MV high-voltage PS including European component is reported.

Published
2019

71. Progress in the ITER Neutral Beam Test Facility

Author

Toigo V., Dal Bello S., Bigi M., Boldrin M., Chitarin G., Grando L., Luchetta A., Marcuzzi D., Pasqualotto R., Pomaro N., Serianni G., Zaccaria P., Zanotto L., Agostinetti P., Agostini M., Antoni V., Aprile D., Barbisan M., Battistella M., Brombin M., Cavazzana R., Dalla Palma M., Dan M., De Lorenzi A., Delogu R., De Muri M., Fadone M., Fellin F., Ferro A., Fiorentin A., Gaio E., Gambetta G., Gasparini F., Gnesotto F., Jain P., Maistrello A., Manduchi G., Manfrin S., Marchiori G., Marconato N., Moresco M., Ocello E., Patton T., Pavei M., Peruzzo S., Pilan N., Pimazzoni A., Piovan R., Poggi C., Recchia M., Rizzolo A., Rostagni G., Sartori E., Siragusa M., Sonato P., Sottocornola A., Spada E., Spagnolo S., Spolaore M., Taliercio C., Tinti P., Ugoletti M., Valente M., Zamengo A., Zaniol B., Zaupa M., Boilson D., Rotti C., Veltri P., Chareyre J., Decamps H., Dremel M., Graceffa J., Geli F., Schunke B., Svensson L., Urbani M., Bonicelli T., Agarici G., Garbuglia A., Masiello A., Paolucci F., Simon M., Bailly-Maitre L., Bragulat E., Gomez G., Gutierrez D., Labate C., Mico G., Moreno J.F., Pilard V., Kouzmenko G., Rousseau A., Kashiwagi M., Tobari H., Watanabe K., Maejiama T., Kojima A., Umeda N., Sasaki S., Chakraborty A., Baruah U., Patel H., Singh N.P., Patel A., Dhola H., Raval B., Gutpa V., Fantz U., Heinemann B., Kraus W., Cavenago M., Hanke S., Ochoa S., Blatchford P., Chuilon B., Xue Y., Croci G., Gorini G., Muraro A., Rebai M., Tardocchi M., D'Arienzo M., Sandri S., Tonti A., and Panin F.

Subjects
MITICA, ITER Neutral Beam Test Facility, SPIDER
Abstract

The ITER Heating Neutral Beam (HNB) injectors, one of the tools necessary both to achieve burning conditions and to control plasma instabilities, are characterized by such demanding parameters as to require the construction of a Neutral Beam Test Facility (NBTF) dedicated to their development and optimization. The NBTF was realized in Padua (Italy), with the direct contribution of the Italian government, through the Consorzio RFX as the host entity, IO, the in kind contributions of three Domestic Agencies (F4E, JADA, INDA) and the technical and scientific support of various European laboratories and universities. The NBTF hosts two experiments: SPIDER and MITICA. The former is devoted to the optimization of the HNB and DNB ion sources and to the achievement of the required source performances. MITICA is the full size prototype of the ITER HNB, with an ion source identical to the one used in SPIDER. This paper gives an overview of the progress of the NBTF realization with particular emphasis on issues discovered during this phase of activities and to the adopted solutions in order to minimize the impact on the schedule while maintaining the goals of the facilities. The realization of MITICA is well advanced; it is expected to enter into operation in 2023 due to the long procurement times of the in-vessel mechanical components. The power supply designed to operate at 1MV are in an advanced phase of realization; all the high voltage components have been installed and the complex insulation test phase has begun in 2018. The construction and installation of SPIDER plant systems was successfully completed with their integration into the facility. The mechanical components of the ion source were installed inside the vessel and connected to the plants. The integrated commissioning with control (CODAS), protection and safety systems ended positively and the first experimental phase began. Finally, the first results of the SPIDER experimentation and of the 1MV insulation tests on the MITICA high voltage components are presented.

Published
2018

72. HV Holding in Vacuum, a Key Issue for the ITER Neutral Beam Injector

Author

De Lorenzi A., Kashiwagi M., and Svensson L.

Subjects
fusion reactors, neutral beam injector, voltage breakdown
Abstract

The achievement of burning plasma in ITER will require at least 33 MW of additional heating transferred to the plasma core by means of two 16.5 MW - 1 MeV injectors (N-NBI - Negative ion based - Neutral Beam Injector) of H or D atoms, with an extracted negative ion current of 40 A (i.e. 40 MW of extracted beam). A third Injector is foreseen as a future upgrade, to increase the power delivery to the ITER plasma up to 50 MW The N-NBI record so far obtained belongs to the Injector of JT60-U, in which have been extracted 17.4 A of negative current, accelerated up to 0.41 MeV. It is evident that the performances required for the ITER N-NBI exceed by far the present capability: for this reason, the Neutral Beam Test Facility - NBTF is under construction at the Consorzio RFX - Padova (I) premises, aimed at realizing the full scale prototype of the ITER N-NBI. Among other fundamental achievements (e.g. extracted current uniformity, efficient ion neutralization, long pulse duration), the success of the experimentation of the NBTF requires the achievement of a stable and easily obtained 1 MV voltage holding while negative ions are extracted and accelerated. The electrostatic configuration of the ITER and NBTF N-NBIs is extremely complex. It includes 5 main electrodes at high potential: five accelerating grids and a negative ion source, operating respectively at -0.2, -0.4, -0.6, -0.8, -1 MV with respect to the containing vessel. All electrodes have large surface (up to 10 m2 for the ion source, which constitutes the cathode); gap lengths are in the order of 100 mm between accelerating grids and a minimum of 980 mm for the -1 MV-to-ground gap. In such a peculiar situation, the full voltage attainment and holding is a key issue, being affected by Total Voltage Effect (TVE), Area Effect, residual gas pressure and electrode surface conditioning. This contribution aims to give an overview of the R&D so far carried out, in the Fusion Research Laboratories in particular the QST (formerly JAEA) lab in Naka, Ibaraki (Japan) , in the IRFM - CEA lab in Cadarache (France) and of the Italian Consorzio RFX lab in Padova. After a discussion of the present state-of-the-art about the voltage holding in the NBI accelerators, a description of the near future plan to achieve reliable voltage holding in the ITER N-NBI is given. The experiments will be performed in the labs of QST, RFX and, in a second stage, at the NBTF Facility in Padova. Finally, an example of spin-off of these researches is also given.

Published
2018

73. Start of SPIDER operation towards ITER Neutral Beams

Author

Serianni G., Toigo V., Chitarin G., Boilson D., Rotti C., Bonicelli T., Chakraborty A., Fantz U., Kashiwagi M., Tsumori K., and NBTF team

Subjects
Neutral Beam Test Facility, ITER, NBTF, SPIDER
Abstract

To reach fusion conditions and control plasma configuration in ITER, the next step towards establishing nuclear fusion as viable energy source, suitable combination of additional heating and current drive systems is necessary. Among them, two Neutral Beam Injectors (NBI) will provide 33MW hydrogen/deuterium particles electrostatically accelerated to 1MeV; efficient gas-cell neutralization at such beam energy requires negative ions, obtained by caesium-catalysed surface conversion of hydrogen/deuterium atoms in the ion source. ITER NBI requirements have never been simultaneously attained; so a Neutral Beam Test Facility (NBTF) was set up at Consorzio RFX (Italy). Experiments will verify continuous NBI operation for one hour, under stringent requirements for beam divergence (

Published
2018

74. Advances in the physics studies for the JT-60SA tokamak exploitation and research plan

Author

Giruzzi, G, primary, Yoshida, M, additional, Aiba, N, additional, Artaud, J F, additional, Ayllon-Guerola, J, additional, Beeke, O, additional, Bierwage, A, additional, Bolzonella, T, additional, Bonotto, M, additional, Boulbe, C, additional, Chernyshova, M, additional, Coda, S, additional, Coelho, R, additional, Corona, D, additional, Cruz, N, additional, Davis, S, additional, Day, C, additional, De Tommasi, G, additional, Dibon, M, additional, Douai, D, additional, Farina, D, additional, Fassina, A, additional, Faugeras, B, additional, Figini, L, additional, Fukumoto, M, additional, Futatani, S, additional, Galazka, K, additional, Garcia, J, additional, Garcia-Muñoz, M, additional, Garzotti, L, additional, Giudicotti, L, additional, Hayashi, N, additional, Honda, M, additional, Hoshino, K, additional, Iantchenko, A, additional, Ide, S, additional, Inoue, S, additional, Isayama, A, additional, Joffrin, E, additional, Kamada, Y, additional, Kamiya, K, additional, Kashiwagi, M, additional, Kawashima, H, additional, Kobayashi, T, additional, Kojima, A, additional, Kurki-Suonio, T, additional, Lang, P, additional, Lauber, Ph, additional, de la Luna, E, additional, Marchiori, G, additional, Matsunaga, G, additional, Matsuyama, A, additional, Mattei, M, additional, Mazzi, S, additional, Mele, A, additional, Miyata, Y, additional, Moriyama, S, additional, Morales, J, additional, Moro, A, additional, Nakano, T, additional, Neu, R, additional, Nowak, S, additional, Orsitto, FP, additional, Ostuni, V, additional, Oyama, N, additional, Paméla, S, additional, Pasqualotto, R, additional, Pégourié, B, additional, Perelli, E, additional, Pigatto, L, additional, Piron, C, additional, Pironti, A, additional, Platania, P, additional, Ploeckl, B, additional, Ricci, D, additional, Romanelli, M, additional, Rubino, G, additional, Sakurai, S, additional, Särkimäki, K, additional, Scannapiego, M, additional, Shinohara, K, additional, Shiraishi, J, additional, Soare, S, additional, Sozzi, C, additional, Suzuki, T, additional, Suzuki, Y, additional, Szepesi, T, additional, Takechi, M, additional, Tanaka, K, additional, Tojo, H, additional, Turnyanskiy, M, additional, Urano, H, additional, Valisa, M, additional, Vallar, M, additional, Varje, J, additional, Vega, J, additional, Villone, F, additional, Wakatsuki, T, additional, Wauters, T, additional, Wischmeier, M, additional, Yamoto, S, additional, and Zagórski, R, additional

Published
2019
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75. P2453Value of pre-operative left atrial minimum volume as a surrogate for post-operative symptoms in patients with aortic stenosis who underwent aortic valve replacement

Author

Hozumi, T, primary, Morimoto, J, additional, Takemoto, K, additional, Wada, T, additional, Maniwa, N, additional, Kashiwagi, M, additional, Shimamura, K, additional, Shiono, Y, additional, Kuroi, A, additional, Matsuo, Y, additional, Kitabata, H, additional, Ino, Y, additional, Kubo, T, additional, Tanaka, A, additional, and Akasaka, T, additional

Published
2019
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76. P2700Impact of instantaneous wave-free ratio on graft failure after coronary artery bypass graft surgery

Author

Wada, T, primary, Shiono, Y, additional, Higashioka, D, additional, Kashiwagi, M, additional, Shimamura, K, additional, Kuroi, A, additional, Honda, K, additional, Matsuo, Y, additional, Kitabata, H, additional, Ino, Y, additional, Kubo, T, additional, Tanaka, A, additional, Hozumi, T, additional, Nishimura, Y, additional, and Akasaka, T, additional

Published
2019
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77. P4349Simple and rapid estimation of left ventricular longitudinal deformation by tissue-tracking mitral annular displacement in single apical view

Author

Nishi, T, primary, Hozumi, T, additional, Takemoto, K, additional, Wada, T, additional, Maniwa, N, additional, Kashiwagi, M, additional, Shimamura, K, additional, Shiono, Y, additional, Kuroi, A, additional, Matsuo, Y, additional, Kitabata, H, additional, Ino, Y, additional, Kubo, T, additional, Tanaka, A, additional, and Akasaka, T, additional

Published
2019
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79. Progress in the ITER neutral beam test facility

Author

Toigo, V., primary, Dal Bello, S., additional, Bigi, M., additional, Boldrin, M., additional, Chitarin, G., additional, Grando, L., additional, Luchetta, A., additional, Marcuzzi, D., additional, Pasqualotto, R., additional, Pomaro, N., additional, Serianni, G., additional, Zaccaria, P., additional, Zanotto, L., additional, Agostinetti, P., additional, Agostini, M., additional, Antoni, V., additional, Aprile, D., additional, Barbisan, M., additional, Battistella, M., additional, Brombin, M., additional, Cavazzana, R., additional, Dalla Palma, M., additional, Dan, M., additional, Denizeau, S., additional, De Lorenzi, A., additional, Delogu, R., additional, De Muri, M., additional, Fadone, M., additional, Fellin, F., additional, Ferro, A., additional, Fiorentin, A., additional, Gaio, E., additional, Gambetta, G., additional, Gasparini, F., additional, Gnesotto, F., additional, Jain, P., additional, Maistrello, A., additional, Manduchi, G., additional, Manfrin, S., additional, Marchiori, G., additional, Marconato, N., additional, Moresco, M., additional, Ocello, E., additional, Patton, T., additional, Pavei, M., additional, Peruzzo, S., additional, Pilan, N., additional, Pimazzoni, A., additional, Piovan, R., additional, Poggi, C., additional, Recchia, M., additional, Rizzolo, A., additional, Rostagni, G., additional, Sartori, E., additional, Siragusa, M., additional, Sonato, P., additional, Sottocornola, A., additional, Spada, E., additional, Spagnolo, S., additional, Spolaore, M., additional, Taliercio, C., additional, Tinti, P., additional, Ugoletti, M., additional, Valente, M., additional, Zamengo, A., additional, Zaniol, B., additional, Zaupa, M., additional, Boilson, D., additional, Rotti, C., additional, Veltri, P., additional, Chareyre, J., additional, Decamps, H., additional, Dremel, M., additional, Graceffa, J., additional, Geli, F., additional, Schunke, B., additional, Svensson, L., additional, Urbani, M., additional, Bonicelli, T., additional, Agarici, G., additional, Garbuglia, A., additional, Masiello, A., additional, Paolucci, F., additional, Simon, M., additional, Bailly-Maitre, L., additional, Bragulat, E., additional, Gomez, G., additional, Gutierrez, D., additional, Labate, C., additional, Mico, G., additional, Moreno, J.F., additional, Pilard, V., additional, Kouzmenko, G., additional, Rousseau, A., additional, Kashiwagi, M., additional, Tobari, H., additional, Watanabe, K., additional, Maejima, T., additional, Kojima, A., additional, Umeda, N., additional, Sasaki, S., additional, Chakraborty, A., additional, Baruah, U., additional, Patel, H., additional, Singh, N.P., additional, Patel, A., additional, Dhola, H., additional, Raval, B., additional, Gupta, V., additional, Fantz, U., additional, Heinemann, B., additional, Kraus, W., additional, Cavenago, M., additional, Hanke, S., additional, Ochoa, S., additional, Blatchford, P., additional, Chuilon, B., additional, Xue, Y., additional, Croci, G., additional, Gorini, G., additional, Muraro, A., additional, Rebai, M., additional, Tardocchi, M., additional, D’Arienzo, M., additional, Sandri, S., additional, Tonti, A., additional, and Panin, F., additional

Published
2019
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84. Numerical study of atomic production rate in hydrogen negative ion sources with the effect of non-equilibrium electron energy distribution function.

Author

Shibata, T., Kashiwagi, M., Inoue, T., Hatayama, A., and Hanada, M.

Subjects
*HYDROGEN ions, *ELECTRON energy states, *DISTRIBUTION (Probability theory), *PROBABILITY theory, *ELECTRON transport
Abstract

Spatial non-uniformity of the dissociative hydrogen atom (H0) production has been investigated in a large negative ion source (JAEA 10 A source) with the electron energy distribution function (EEDF) obtained by a Monte-Carlo simulation code for electron transport in 3D3V (three dimensional real and velocity) space. It has been shown that the H0 production rate becomes larger in the upper region (one side in the longitudinal direction) of the source chamber. This spatial non-uniformity of the H0 production profile is mainly explained by the non-equilibrium features of the EEDF in the upper region, i.e., the EEDF consists of thermal electron component with kinetic energy [variant_greek_epsilon] < 25 eV and fast electron component with energy [variant_greek_epsilon] > 25 eV in the upper region, while the EEDF mainly consists of only thermal electrons in the bottom region. These characteristics for the EEDF and the energy dependence of cross-sections for dissociation and dissociative ionization processes lead to the non-uniform profile of the H0 production. The above numerical results of the spatial H0 non-uniformity are validated and confirmed by comparisons with those by spectroscopic measurement. It has been clarified that the non-equilibrium (fast electron) component of the EEDF has a large contribution to the non-uniformity of the H0 production rate. [ABSTRACT FROM AUTHOR]

Published
2013
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85. P4667Value of speckle-tracking echocardiographic tricuspid annular displacement for the assessment of right ventricular systolic dysfunction

Author

Maniwa, N, primary, Hozumi, T, additional, Takemoto, K, additional, Ota, S, additional, Kashiwagi, M, additional, Shimamura, K, additional, Shiono, Y, additional, Kuroi, A, additional, Kameyama, T, additional, Matsuo, Y, additional, Ino, Y, additional, Kitabata, H, additional, Kubo, T, additional, Tanaka, A, additional, and Akasaka, T, additional

Published
2018
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86. P784Association between cholesterol crystals piercing fibrous cap and plaque rupture in patients with acute coronary syndrome

Author

Katayama, Y, primary, Tanaka, A, additional, Emori, H, additional, Taruya, A, additional, Wada, T, additional, Maniwa, N, additional, Kashiwagi, M, additional, Shimamura, K, additional, Shiono, Y, additional, Matsuo, Y, additional, Kitabata, H, additional, Ino, Y, additional, Kubo, T, additional, Hozumi, T, additional, and Akasaka, T, additional

Published
2018
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87. P861Relationship between noninvasive assessment of left ventricular intra-ventricular pressure gradients estimated by vector flow mapping and left ventricular systolic and diastolic function

Author

Hozumi, T, primary, Nozawa, Y, additional, Teraguchi, I, additional, Takemoto, K, additional, Ota, S, additional, Kashiwagi, M, additional, Shimamura, K, additional, Kuroi, A, additional, Kamayama, T, additional, Matsuo, Y, additional, Kitabata, H, additional, Ino, Y, additional, Kubo, T, additional, Tanaka, A, additional, and Akasaka, T, additional

Published
2018
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94. Complete compensation of criss-cross deflection in a negative ion accelerator by magnetic technique

Author

Aprile, Daniele, primary, Agostinetti, P., additional, Baltador, C., additional, Denizeau, S., additional, Hiratsuka, J., additional, Ichikawa, M., additional, Kashiwagi, M., additional, Kojima, A., additional, Marconato, N., additional, Pimazzoni, A., additional, Sartori, E., additional, Serianni, G., additional, Veltri, P., additional, Yoshida, M., additional, and Chitarin, G., additional

Published
2018
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95. Methods of Beam Emittance Measurements of High Power Negative Ion beams for NBIs.

Author

Saquilayan, G. Q., Kashiwagi, M., Tobari, H., Hiratsuka, J., Ichikawa, M., Umeda, N., Watanabe, K., Wada, M., and Sasao, M.

Subjects
*BEAM emittance (Nuclear physics), *PLASMA beam injection heating, *POWER density, *NEUTRAL beams, *ELECTRIC arc
Abstract

A thermal beam emittance measurement method is developed specifically to measure high power density beams for the ITER neutral beam injection system (NBI)’s. A one-dimensional carbon-fiber composite (CFC) target is utilized to withstand the high current densities of the negative hydrogen beam making the beam emittance measurement possible. Schemes for the emittance measurement were discussed since beam instabilities are present in various stages of the beam phase. The allowable time for the measurement will be less than 2 seconds and it’s necessary to monitor the CFC temperature to not exceed 2000°C. The proposed measurement scheme to minimize beam instabilities is through the constant operation of the arc discharge and pulsed beam extraction. Mechanical structures are also being designed for rapid measurements to select different phases of the beam and for implementing the measurement system to long pulse beam operation. [ABSTRACT FROM AUTHOR]

Published
2018
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96. Evaluation of the Temperature Dependence of the Cesium Deposition on the Plasma Grid in the JT-60SA Negative Ion Source.

Author

Yoshida, M., Oohara, W., Ichikawa, M., Hiratsuka, J., Umeda, N., Kojima, A., and Kashiwagi, M.

Subjects
CESIUM, ANIONS, ION sources, IONIZATION (Atomic physics), QUARTZ crystal microbalances
Abstract

In order to evaluate deposition of cesium (Cs) in the plasma grid (PG) and investigate the origin of the gradual degradation of the negative ion current in a 100 s long pulsed operation in the JT-60SA negative ion source, Cs behavior in the source is model. To do this, Cs adsorption/desorption coefficient with a wide range of temperature is experimentally measured by a surface ionization detector and a quartz crystal microbalance. As a result, both of the adsorption and desorption are drastically varied at temperature range from room temperature to 100 °C. Based on these data, the model calculates the amounts of the Cs mass in the chamber wall and PG. The calculation result shows that, in the operation, an increase of temperature in the chamber wall (Twall) causes the evaporation of the huge amount of Cs in it. This leads to over pilling-up of Cs in the PG and the slight degradation of the negative ion production. Therefore, it is found that the constant temperature operation is needed to sustain the thickness of the Cs monolayer in the PG, and the Twall is desired to be less than 60 °C to suppress the evaporation of Cs in the chamber wall. According to this model, it is showed that there are many combinations of the temperatures to achieve it with low Cs consumption. [ABSTRACT FROM AUTHOR]

Published
2018
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97. Numerical analysis of the production profile of H0 atoms and subsequent H- ions in large negative ion sources.

Author

Takado, N., Tobari, H., Inoue, T., Hanatani, J., Hatayama, A., Hanada, M., Kashiwagi, M., and Sakamoto, K.

Subjects
HYDROGEN, MONTE Carlo method, ELECTRONS, ATOMS, TEMPERATURE
Abstract

The production and transport processes of H0 atoms are numerically simulated using a three-dimensional Monte Carlo transport code. The code is applied to the large JAEA 10 ampere negative ion source under the Cs-seeded condition to obtain a spatial distribution of surface-produced H- ions. In this analysis, the amount of H0 atoms produced through dissociation processes of H2 molecules is calculated from the electron temperature and density obtained by Langmuir probe measurements. The high-energy tail of electrons, which greatly affects H0 atom production, is taken into account by fitting a single-probe characteristic as a two-temperature Maxwellian distribution. In the H0 atom transport process, the energy relaxation of the H0 atoms, which affects the surface H- ion production rate, is taken into account. The result indicates that the surface H- ion production is enhanced near the high-electron-temperature region where H0 atom production is localized. [ABSTRACT FROM AUTHOR]

Published
2008
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98. The PRIMA Test Facility: SPIDER and MITICA test-beds for ITER neutral beam injectors

Author

Toigo, V, Piovan, R, Bello, S, Gaio, E, Luchetta, A, Pasqualotto, R, Zaccaria, P, Bigi, M, Chitarin, G, Marcuzzi, D, Pomaro, N, Serianni, G, Agostinetti, P, Agostini, M, Antoni, V, Aprile, D, Baltador, C, Barbisan, M, Battistella, M, Boldrin, M, Brombin, M, Palma, M, De Lorenzi, A, Delogu, R, De Muri, M, Fellin, F, Ferro, A, Fiorentin, A, Gambetta, G, Gnesotto, F, Grando, L, Jain, P, Maistrello, A, Manduchi, G, Marconato, N, Moresco, M, Ocello, E, Pavei, M, Peruzzo, S, Pilan, N, Pimazzoni, A, Recchia, M, Rizzolo, A, Rostagni, G, Sartori, E, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Valente, M, Veltri, P, Zamengo, A, Zaniol, B, Zanotto, L, Zaupa, M, Boilson, D, Graceffa, J, Svensson, L, Schunke, B, Decamps, H, Urbani, M, Kushwah, M, Chareyre, J, Singh, M, Bonicelli, T, Agarici, G, Garbuglia, A, Masiello, A, Paolucci, F, Simon, M, Bailly maitre, L, Bragulat, E, Gomez, G, Gutierrez, D, Mico, G, Moreno, J, Pilard, V, Kashiwagi, M, Hanada, M, Tobari, H, Watanabe, K, Maejima, T, Kojima, A, Umeda, N, Yamanaka, H, Chakraborty, A, Baruah, U, Rotti, C, Patel, H, Nagaraju, M, Singh, N, Patel, A, Dhola, H, Raval, B, Fantz, U, Heinemann, B, Kraus, W, Hanke, S, Hauer, V, Ochoa, S, Blatchford, P, Chuilon, B, Xue, Y, De Esch, H, Hemsworth, R, Croci, G, Gorini, G, Rebai, M, Muraro, A, Tardocchi, M, Cavenago, M, D'Arienzo, M, Sandri, S, Tonti, A, CROCI, GABRIELE, GORINI, GIUSEPPE, REBAI, MARICA, MURARO, ANDREA, TARDOCCHI, MARCO, Tonti, A., Toigo, V, Piovan, R, Bello, S, Gaio, E, Luchetta, A, Pasqualotto, R, Zaccaria, P, Bigi, M, Chitarin, G, Marcuzzi, D, Pomaro, N, Serianni, G, Agostinetti, P, Agostini, M, Antoni, V, Aprile, D, Baltador, C, Barbisan, M, Battistella, M, Boldrin, M, Brombin, M, Palma, M, De Lorenzi, A, Delogu, R, De Muri, M, Fellin, F, Ferro, A, Fiorentin, A, Gambetta, G, Gnesotto, F, Grando, L, Jain, P, Maistrello, A, Manduchi, G, Marconato, N, Moresco, M, Ocello, E, Pavei, M, Peruzzo, S, Pilan, N, Pimazzoni, A, Recchia, M, Rizzolo, A, Rostagni, G, Sartori, E, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Valente, M, Veltri, P, Zamengo, A, Zaniol, B, Zanotto, L, Zaupa, M, Boilson, D, Graceffa, J, Svensson, L, Schunke, B, Decamps, H, Urbani, M, Kushwah, M, Chareyre, J, Singh, M, Bonicelli, T, Agarici, G, Garbuglia, A, Masiello, A, Paolucci, F, Simon, M, Bailly maitre, L, Bragulat, E, Gomez, G, Gutierrez, D, Mico, G, Moreno, J, Pilard, V, Kashiwagi, M, Hanada, M, Tobari, H, Watanabe, K, Maejima, T, Kojima, A, Umeda, N, Yamanaka, H, Chakraborty, A, Baruah, U, Rotti, C, Patel, H, Nagaraju, M, Singh, N, Patel, A, Dhola, H, Raval, B, Fantz, U, Heinemann, B, Kraus, W, Hanke, S, Hauer, V, Ochoa, S, Blatchford, P, Chuilon, B, Xue, Y, De Esch, H, Hemsworth, R, Croci, G, Gorini, G, Rebai, M, Muraro, A, Tardocchi, M, Cavenago, M, D'Arienzo, M, Sandri, S, Tonti, A, CROCI, GABRIELE, GORINI, GIUSEPPE, REBAI, MARICA, MURARO, ANDREA, TARDOCCHI, MARCO, and Tonti, A.

Abstract

The ITER Neutral Beam Test Facility (NBTF), called PRIMA (Padova Research on ITER Megavolt Accelerator), is hosted in Padova, Italy and includes two experiments: MITICA, the full-scale prototype of the ITER heating neutral beam injector, and SPIDER, the full-size radio frequency negative-ions source. The NBTF realization and the exploitation of SPIDER and MITICA have been recognized as necessary to make the future operation of the ITER heating neutral beam injectors efficient and reliable, fundamental to the achievement of thermonuclear-relevant plasma parameters in ITER. This paper reports on design and R&D carried out to construct PRIMA, SPIDER and MITICA, and highlights the huge progress made in just a few years, from the signature of the agreement for the NBTF realization in 2011, up to now - when the buildings and relevant infrastructures have been completed, SPIDER is entering the integrated commissioning phase and the procurements of several MITICA components are at a well advanced stage

Published
2017

99. A substantial step forward in the realization of the ITER HNB system: The ITER NBI Test Facility

Author

Toigo, V, Piovan, R, Dal Bello, S, Gaio, E, Luchetta, A, Pasqualotto, R, Zaccaria, P, Bigi, M, Chitarin, G, Marcuzzi, D, Pomaro, N, Serianni, G, Agostinetti, P, Agostini, M, Antoni, V, Aprile, D, Baltador, C, Barbisan, M, Battistella, M, Boldrin, M, Brombin, M, Dalla Palma, M, De Lorenzi, A, Delogu, R, De Muri, M, Fellin, F, Ferro, A, Finotti, C, Fiorentin, A, Gambetta, G, Gnesotto, F, Grando, L, Jain, P, Maistrello, A, Manduchi, G, Marconato, N, Moresco, M, Ocello, E, Pavei, M, Peruzzo, S, Pilan, N, Pimazzoni, A, Recchia, M, Rizzolo, A, Rostagni, G, Sartori, E, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Valente, M, Veltri, P, Zamengo, A, Zaniol, B, Zanotto, L, Zaupa, M, Boilson, D, Graceffa, J, Svensson, L, Schunke, B, Decamps, H, Urbani, M, Kushwah, M, Chareyre, J, Singh, M, Bonicelli, T, Agarici, G, Masiello, A, Paolucci, F, Simon, M, Bailly Maitre, L, Bragulat, E, Gomez, G, Gutierrez, D, Mico, G, Moreno, J, Pilard, V, Kashiwagi, M, Hanada, M, Tobari, H, Watanabe, K, Maeshima, T, Kojima, A, Umeda, N, Yamanaka, H, Chakraborty, A, Baruah, U, Rotti, C, Patel, H, Nagaraju, M, Singh, N, Patel, A, Dhola, H, Raval, B, Fantz, U, Heinemann, B, Kraus, W, Hanke, S, Hauer, V, Ochoa, S, Blatchford, P, Chuilon, B, Xue, Y, De Esch, H, Hemsworth, R, Croci, G, Gorini, G, Rebai, M, Muraro, A, Cavenago, M, D'Arienzo, M, Sandri, S, CROCI, GABRIELE, GORINI, GIUSEPPE, REBAI, MARICA, MURARO, ANDREA, Sandri, S., Toigo, V, Piovan, R, Dal Bello, S, Gaio, E, Luchetta, A, Pasqualotto, R, Zaccaria, P, Bigi, M, Chitarin, G, Marcuzzi, D, Pomaro, N, Serianni, G, Agostinetti, P, Agostini, M, Antoni, V, Aprile, D, Baltador, C, Barbisan, M, Battistella, M, Boldrin, M, Brombin, M, Dalla Palma, M, De Lorenzi, A, Delogu, R, De Muri, M, Fellin, F, Ferro, A, Finotti, C, Fiorentin, A, Gambetta, G, Gnesotto, F, Grando, L, Jain, P, Maistrello, A, Manduchi, G, Marconato, N, Moresco, M, Ocello, E, Pavei, M, Peruzzo, S, Pilan, N, Pimazzoni, A, Recchia, M, Rizzolo, A, Rostagni, G, Sartori, E, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Valente, M, Veltri, P, Zamengo, A, Zaniol, B, Zanotto, L, Zaupa, M, Boilson, D, Graceffa, J, Svensson, L, Schunke, B, Decamps, H, Urbani, M, Kushwah, M, Chareyre, J, Singh, M, Bonicelli, T, Agarici, G, Masiello, A, Paolucci, F, Simon, M, Bailly Maitre, L, Bragulat, E, Gomez, G, Gutierrez, D, Mico, G, Moreno, J, Pilard, V, Kashiwagi, M, Hanada, M, Tobari, H, Watanabe, K, Maeshima, T, Kojima, A, Umeda, N, Yamanaka, H, Chakraborty, A, Baruah, U, Rotti, C, Patel, H, Nagaraju, M, Singh, N, Patel, A, Dhola, H, Raval, B, Fantz, U, Heinemann, B, Kraus, W, Hanke, S, Hauer, V, Ochoa, S, Blatchford, P, Chuilon, B, Xue, Y, De Esch, H, Hemsworth, R, Croci, G, Gorini, G, Rebai, M, Muraro, A, Cavenago, M, D'Arienzo, M, Sandri, S, CROCI, GABRIELE, GORINI, GIUSEPPE, REBAI, MARICA, MURARO, ANDREA, and Sandri, S.

Abstract

Substantial progresses have been achieved in the realization of the ITER Neutral Beam Test Facility (NBTF) hosted in Padova, Italy; the buildings, completed by the end of 2015, are being progressively filled with new systems and components. The realization of SPIDER, the ITER full-size negative ion source, is well advanced and important progress is also recorded for MITICA, the full-scale prototype of the ITER HNB injector. The paper gives an overview of the achieved results, highlighting the main challenges faced.

Published
2017

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