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34 results on '"Hesch, K."'

1. Extreme Ultraviolet (EUV) Sources for Lithography based on Synchrotron Radiation

Author

Dattoli, G., Doria, A., Gallerano, G. P., Giannessi, L., Hesch, K., Moser, H. O., Ottaviani, P. L., Pellegrin, E., Rossmanith, R., Steininger, R., Saile, V., and Wuest, J.

Subjects
Physics - Accelerator Physics
Abstract

The study presented here was initiated by a discussion to investigate the possibility of using synchrotron radiation as a source for the Next Generation Lithography (NGL) based on the EUV-concept (Extreme Ultra-Violet; here 13.5 nm or 11.3 nm radiation, respectively). The requirements are: 50 W, 2% bandwidth and minimal power outside this bandwidth. Three options were investigated. The first two deal with radiation from bending magnets and undulators. The results confirm the earlier work by Oxfords Instrument and others that these light-sources lack in-band power while emitting excessive out-of-band radiation. The third approach is a FEL (Free Electron Laser) driven by a 500 MeV linear accelerator with a superconducting mini-undulator as radiation emitting device. Such a device would produce in-band EUV-power in excess of 50 W with negligible out-of-band power., Comment: Submitted to Nuclear Instruments and Methods A

Published
2001
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3. Status of the development of the EU 170 GHz/1 MW/CW gyrotron

Author

Pagonakis, I.G. Albajar, F. Alberti, S. Avramidis, K. Bonicelli, T. Braunmueller, F. Bruschi, A. Chelis, I. Cismondi, F. Gantenbein, G. Hermann, V. Hesch, K. Hogge, J.-P. Jelonnek, J. Jin, J. Illy, S. Ioannidis, Z.C. Kobarg, T. Latsas, G.P. Legrand, F. Lontano, M. Piosczyk, B. Rozier, Y. Rzesnicki, T. Samartsev, A. Schlatter, C. Thumm, M. Tigelis, I.G. Tran, M.-Q. Tran, T.-M. Weggen, J. Vomvoridis, J.L.

Abstract

The progress in the development of the European 170 GHz, 1 MW/CW gyrotron for electron cyclotron heating & current drive (ECH&CD) on ITER is reported. A continuous wave (CW) prototype is being manufactured by Thales Electron Devices (TED), France, while a short-pulse (SP) prototype gyrotron is in parallel under manufacture at Karlsruhe Institute of Technology (KIT), with the purpose of validating the design of the CW industrial prototype components. The fabrication of most of the sub-assemblies of the SP prototype has been completed. In a first step, an existing magnetron injection gun (MIG) available at KIT was used. Despite this non-ideal configuration, the experiments provided a validation of the design, substantiated by an excellent agreement with numerical simulations. The tube, operated without a depressed collector, is able to produce more than 1 MW of output power with efficiency in excess of 30%, as expected, and compatible with the ITER requirements. © 2015 Karlsruhe Institute of Technology.

Published
2015

5. From series production of gyrotrons for W7-X toward EU-1 MW gyrotrons for ITER

Author

Jelonnek, J. Albajar, F. Alberti, S. Avramidis, K. Benin, P. Bonicelli, T. Cismondi, F. Erckmann, V. Gantenbein, G. Hesch, K. Hogge, J.-P. Illy, S. Ioannidis, Z.C. Jin, J. Laqua, H. Latsas, G.P. Legrand, F. Michel, G. Pagonakis, I.G. Piosczyk, B. Rozier, Y. Rzesnicki, T. Tigelis, I.G. Thumm, M. Tran, M.Q. Vomvoridis, J.L.

Abstract

Europe is devoting significant joint efforts to develop and to manufacture MW-level gyrotrons for electron cyclotron heating and current drive of future plasma experiments. The two most important ones are the stellarator Wendelstein W7-X at Greifswald and the Tokamak ITER at Cadarache. While the series production of the 140 GHz, 1 MW, CW gyrotrons for the 10-MW electron cyclotron resonance heating system of stellarator W7-X is proceeding, the European GYrotron Consortium is presently developing the EU-1 MW, 170 GHz, CW gyrotron for ITER. The initial design had already been initiated in 2007, as a risk mitigation measure during the development of the advanced ITER EU-2-MW coaxial-cavity gyrotron. The target of the ITER EU-1-MW conventional-cavity design is to benefit as much as possible from the experiences made during the development and series production of the W7-X gyrotron and of the experiences gained from the earlier EU-2-MW coaxial-cavity gyrotron design. Hence, the similarity of the construction will be made visible in this paper. During 2012, the scientific design of the ITER EU-1-MW gyrotron components has been finalized. In collaboration with the industrial partner Thales electron devices, Vélizy, France, the industrial design of the technological parts of the gyrotron is being completed. A short-pulse prototype is under development to support the design of the CW prototype tube. The technological path toward the EU ITER-1 MW gyrotron and the final design will be presented. © 2013 IEEE.

Published
2014

9. Progress on the development of the EU-1 MW gyrotron for ITER

Author

Illy, S., primary, Avramidis, K., additional, Gantenbein, G., additional, Hesch, K., additional, Jelonnek, J., additional, Jin, J., additional, Pagonakis, I., additional, Piosczyk, B., additional, Rzesnicki, T., additional, Thumm, M., additional, Alberti, S., additional, Hogge, J.-P., additional, Tran, M. Q., additional, Hermann, V., additional, Legrand, F., additional, Rozier, Y., additional, Vomvoridis, J. L., additional, Chelis, J., additional, Ioannidis, Z. C., additional, Latsas, G. P., additional, Tigelis, I. G., additional, Albajar, F., additional, Bonicelli, T., additional, and Cismondi, F., additional

Published
2014
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11. KIT gyrotron development for future fusion applications

Author

Jelonnek, J., primary, Avramidis, K., additional, Franck, J., additional, Gantenbein, G., additional, Hesch, K., additional, Illy, S., additional, Jin, J., additional, Malygin, A., additional, Pagonakis, I., additional, Rzesnicki, T., additional, Samartsev, A., additional, Scherer, T., additional, Schlaich, A., additional, Schmid, M., additional, Strauss, D., additional, Thumm, M., additional, and Zhang, J., additional

Published
2013
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12. From series production of gyrotrons for W7-X towards EU-1 MW gyrotrons for ITER

Author

Jelonnek, J., primary, Gantenbein, G., additional, Hesch, K., additional, Jin, J., additional, Pagonakis, I., additional, Piosczyk, B., additional, Rzesnicki, T., additional, Thumm, M., additional, Alberti, S., additional, Hogge, J.-P., additional, Tran, M. Q., additional, Erckmann, V., additional, Laqua, H., additional, Michel, G., additional, Benin, P., additional, Legrand, F., additional, Rozier, Y., additional, Avramidis, K., additional, Vomvoridis, J. L., additional, Ioannidis, Z. C., additional, Latsas, G. P., additional, Tigelis, I. G., additional, Albajar, F., additional, Bonicelli, T., additional, and Cismondi, F., additional

Published
2013
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18. Stress ulcer prophylaxis in the intensive care unit.

Author

Mohebbi L and Hesch K

Abstract

The article discusses the significance of stress ulcer prophylaxis (SUP) in the intensive care unit (ICU) setting. It notes that the American Society of Health-System Pharmacists (ASHP) published the available guidelines in 1999 for the use of SUP in medical, surgical, respiratory, and pediatric ICU patients. However, it cites that the continuation of SUP in general medicine setting is not necessary unless patients have one independent risk factor increasing the risk of clinical bleeding.

Published
2009
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19. Agents for treatment of overactive bladder: a therapeutic class review.

Author

Hesch K

Abstract

Overactive bladder (OAB) is a medical syndrome defined by symptoms of urgency, with or without urge urinary incontinence (any involuntary loss of urine), usually with frequency and nocturia. Although anticholinergic agents have been the first-line treatment for OAB for many years, the efficacious pharmacologic management of this condition has been compromised by concerns regarding tolerability. Flavoxate was the first anticholinergic and antispasmodic agent approved by the Food and Drug Administration (FDA) to treat symptoms of OAB but is not routinely used today since newer agents are more effective. The more recent drugs, oxybutynin and tolterodine, have appeared to be equally efficacious in treating the symptoms of OAB in clinical trials; however, tolterodine has proven to be better tolerated with fewer adverse effects. In 2004, the FDA approved the three newest agents for the class: darifenacin, solifenacin, and trospium. Compared with oxybutynin and tolterodine, these agents have a more favorable side effect profile, which can enhance tolerability and patient compliance. Side effects are reduced in part because of the drugs' greater tissue selectivity for inhibiting the bladder muscle contraction over other anticholinergic receptors in the body. In recent clinical trials, darifenacin, solifenacin, and trospium have shown superiority to placebo and efficacy comparable to that of oxybutynin and tolterodine. [ABSTRACT FROM AUTHOR]

Published
2007
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22. Progress on the development of the EU-1 MW gyrotron for ITER

Author

Illy, S., Avramidis, K., Gantenbein, G., Hesch, K., Jelonnek, J., Jin, J., Pagonakis, I., Piosczyk, B., Rzesnicki, T., Thumm, M., Alberti, S., Hogge, J.-P., Tran, M.Q., Rozier, Y., Vomvoridis, J.L., Chelis, J., Ioannidis, Z.C., Tatsas, G.P., Tigelis, I.G., Albajar, F., Bonicelli, T., and Cismondi, F.

24. DEVELOPMENT OF ADVANCED GYROTRONS IN EUROPE

Author

Jelonnek, J., Alberti, S., Konstantinos Avramidis, Erckmann, V., Gantenbein, G., Hesch, K., Hogge, J. P., Illy, S., Jin, J. B., Kern, S., Pagonakis, I., Piosczyk, B., Rzesnicki, T., Samartsev, A., Thumm, M., Kit, Epfl, Crpp, Hellas, Stuttgart, I. P. F., Ipf, C. N. R., and Greifswald, I. P. P.

27. Extreme ultraviolet (EUV) sources based on synchrotron radiation

Author

Hesch, K., primary, Pellegrin, E., additional, Rossmanith, R., additional, Steininger, R., additional, Saile, V., additional, Wust, J., additional, Dattoli, G., additional, Doria, A., additional, Gallerano, G.P., additional, Giannessi, L., additional, Ottaviani, P.L., additional, and Moser, H.O., additional

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