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297 results on '"Schuh, M"'

3. Aberrant cortex contractions impact mammalian oocyte quality

Author

Nikalayevich, E, Letort, G, de Labbey, G, Todisco, E, Shihabi, A, Turlier, H, Voituriez, R, Yahiatene, M, Pollet-Villard, X, Innocenti, M, Schuh, M, Terret, M, Verlhac, M, Nikalayevich, Elvira, Letort, Gaëlle, de Labbey, Ghislain, Todisco, Elena, Shihabi, Anastasia, Turlier, Hervé, Voituriez, Raphaël, Yahiatene, Mohamed, Pollet-Villard, Xavier, Innocenti, Metello, Schuh, Melina, Terret, Marie-Emilie, Verlhac, Marie-Hélène, Nikalayevich, E, Letort, G, de Labbey, G, Todisco, E, Shihabi, A, Turlier, H, Voituriez, R, Yahiatene, M, Pollet-Villard, X, Innocenti, M, Schuh, M, Terret, M, Verlhac, M, Nikalayevich, Elvira, Letort, Gaëlle, de Labbey, Ghislain, Todisco, Elena, Shihabi, Anastasia, Turlier, Hervé, Voituriez, Raphaël, Yahiatene, Mohamed, Pollet-Villard, Xavier, Innocenti, Metello, Schuh, Melina, Terret, Marie-Emilie, and Verlhac, Marie-Hélène

Abstract

The cortex controls cell shape. In mouse oocytes, the cortex thickens in an Arp2/3-complex-dependent manner, ensuring chromosome positioning and segregation. Surprisingly, we identify that mouse oocytes lacking the Arp2/3 complex undergo cortical actin remodeling upon division, followed by cortical contractions that are unprecedented in mammalian oocytes. Using genetics, imaging, and machine learning, we show that these contractions stir the cytoplasm, resulting in impaired organelle organization and activity. Oocyte capacity to avoid polyspermy is impacted, leading to a reduced female fertility. We could diminish contractions and rescue cytoplasmic anomalies. Similar contractions were observed in human oocytes collected as byproducts during IVF (in vitro fertilization) procedures. These contractions correlate with increased cytoplasmic motion, but not with defects in spindle assembly or aneuploidy in mice or humans. Our study highlights a multiscale effect connecting cortical F-actin, contractions, and cytoplasmic organization and affecting oocyte quality, with implications for female fertility.

Published
2024

6. Beam Diagnostics for the Storage Ring of the cSTART Project at KIT

Author

Khechen, D. El, Bründermann, E., Mochihashi, A., Müller, A-S., Noll, M.-D., Papash, A. I., Ruprecht, R., Schreiber, P., Schuh, M., and Steinmann, J. L.

Subjects
Physics, ddc:530
Abstract

In the framework of the compact STorage ring for Accelerator Research and Technology (cSTART) project, which will be realized at Karlsruhe Institute of Technology (KIT), a Very Large Acceptance compact Storage Ring (VLA-cSR) is planned to study the injection and the storage of 50 MeV, ultra-short (sub-ps) electron bunches from a laser plasma accelerator (LPA) and the linac-based test facility FLUTE. For such a storage ring, where a single bunch with a relatively wide range of bunch charge (1 pC - 1000 pC ) and energy spread (10’4 - 10’2) will circulate at a relatively high revolution frequency (7 MHz), the choice of beam diagnostics is very delicate. In this paper, we would like to discuss several beam diagnostics options for the storage ring and to briefly report on several tests that have been or are planned to be realized in our existing facilities.

Published
2022
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10. Alpha-buckets in High Energy Electron Storage Rings (Review of Existing Experiments and Feasibility Studies for Future Developments) Review

Author

Papash, A., Brosi, M., Schreiber, P., Boltz, T., Smale, N., Müller, A.-S., Ruprecht, R., and Schuh, M.

Subjects
Technology, Physics::Accelerator Physics, ddc:600
Abstract

Electron storage rings operating at high energies have proven to be invaluable source of synchrotron radiation. Two and even three simultaneous beams of particles have been observed at different light source facilities worldwide. So called alpha-buckets were studied at Metrological Light Source (MLS) in Berlin (Germany), SOLEIL facility in France, DIAMOND light source in UK, NSLS ring in Brookhaven (USA). It is widely recognized that alpha buckets are general phenomena which is not restricted to a certain storage ring. However, earlier measurements showed essential limitations on parameters of alpha-buckets, strong dependence on high order (sextupole and octupoles) magnetic field imperfections and associated fast decay of electron current as well as reduced life time. Also a rising relevance of high order non-linear longitudinal beam dynamics is associated with new generation of diffraction limited light sources (DLSR) approaches, which all suffer nonlinear momentum compaction factor. A large variety of future generation electron synchrotrons require a comprehensive investigation of the physical processes involved into the operation of such rings. In this paper, we present review of high order non-linear longitudinal beam dynamics based on the longitudinal equations of motion and Hamiltonian expanded to a high order of the momentum compaction factor. Roots of the third order equation with a free term are derived in a form suitable for analytical estimations. The momentum independent term of orbit lengthening due to particle transverse excursions is estimated and taken into account. The results from simulations were benchmarked against existing experiments at the Karlsruhe Research Accelerator (KARA), SOLEIL and MLS rings. Parameters of three simultaneous beams and alpha buckets at MLS and SOLEIL have been reproduced with high accuracy. General conditions for stable operation of alpha buckets are presented. Based on analytical formulas and computer simulations, studies of longitudinal motion at KARA have been performed with an objective to estimate feasibility of filling and storing of beam in α-buckets. A Computer model was used to describe the behavior and dynamics of simultaneous beams in the KARA storage ring.

Published
2021
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11. Systematic studies of the microbunching and weak instability at short bunch lengths

Author

Brosi, M, Blomley, E, Boltz, T, Bründermann, E, Caselle, M, Gethmann, J, Kehrer, B, Papash, A.I., Rota, L, Schönfeldt, P, Schreiber, P, Schuh, M, Schwarz, M, Steinmann, J L, Weber, M, Müller, A S, and Kuske, P

Subjects
Physics::Accelerator Physics, Accelerators and Storage Rings
Abstract

At KARA, the Karlsruhe Research Accelerator of the Karlsruhe Institute of Technology synchrotron, the so-called short-bunch operation mode allows the reduction of the bunch length down to a few picoseconds. The microbunching instability resulting from the high degree of longitudinal compression leads to fluctuations in the emitted terahertz radiation. For highly compressed bunches at KARA, the instability occurs not only in one but in two different bunch-current ranges that are separated by a stable region. The additional region of instability is referred to as short-bunch-length bursting or weak instability. We will present measurements of the threshold currents and fluctuation frequencies in both regimes. Good agreement is found between the measurement and numerical solutions of the Vlasov-Fokker-Planck equation. This contribution is based on the PRAB paper Phys. Rev. Accel. Beams 22, 020701., CERN Yellow Reports: Conference Proceedings, Vol. 9 (2020): Proceedings of the ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators, Zermatt, Switzerland, 23–27 September 2019

Published
2020
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17. Abstract

Author

Mache, Ch., Urban, Ch., Sauer, H., Brandesky, G., Meßner, H., Grienberger, H., Becker, H., Slave, I., Hauer, Ch., Pakisch, B., Oberbauer, R., Mokry, M., Ebner, F., Kleinert, R., Schiller, D., Kasparu, H., Schneider, G., Sega, W., Lutz, D., Mader, R. M., Steger, G. G., Sieder, A. E., Ovissi, L., Roth, E., Hamilton, G., Jakesz, R., Rainer, H., Schenk, T., Kornek, G., Schulz, F., Depisch, D., Rosen, H., Sebesta, Ch., Scheithauer, W., Locker, G. J., Czernin, J., Derfler, K., Gnant, M., Schiessel, R., Petru, E., Pickel, H., Heydarfadai, M., Lahousen, M., Haas, J., Sagaster, P., Flamm, J., Umek, H., Essl, R., Teich, G., Micksche, M., Ludwig, H., Ambros, P. F., Lestou, V., Strehl, S., Mann, G., Gadner, H., Eibl, B., Greiter, E., Grünewald, K., Gastl, G., Thaler, J., Aulitzky, W., Lion, T., Henn, T., Gaiger, A., Hofmann, J., Wolf, A., Spitaler, M., Ludescher, Christof, Grunicke, H., Mitterbauer, G., Stangl, E., Geissler, K., Jäger, U., Lechner, K., Mannhalter, C., Haas, Oskar A., Tirita, Anthi, Kahls, P., Haas, O., Hinterberger, W., Linkesch, W., Pober, Michael, Fae, Ingrid, Kyrle, Alexander, Neumeister, Andrea, Panzer, Simon, Kandioler, D., End, A., Grill, R., Karlic, H., Inhauser, T., Chott, A., Pirc-Danoewinata, H., Klepetko, W., Heinz, R., Hopfinger-Limberger, G., Koller, E., Schneider, B., Pittermann, E., Lorber, C., Eichinger, S., Neumann, E., Weidinger, J., Gisslinger, H., Bedford P., Jones D., Cawley J., Catovsky D., Bevan P., Scherrer, R., Bettelheim, P., Knöbl, P., Kyrie, P. A., Lazcika, K., Schwarzinger, I., Sillaber, C., Watzke, H., Dávid, M., Losonczy, H., Matolcsy, A., Papp, M., Prischl, F. C., Schwarzmeier, J. D., Zoubek, Andreas, Harbott, Jochen, Ritterbach, Jutta, Ritter, Jörg, Sillaber, Ch., Agis, H., Spanblöchl, E., Sperr, W. R., Valent, P., Czerwenka, K., Virgolini, I., Li, S. R., Müller, M., Wrann, M., Gaggl, S., Fasching, B., Herold, M., Geissler, D., Nachbaur, D., Huber, Ch., Schwaighofer, H., Pichl, M., Niederwieser, D., Gilly, B., Weissel, H., Lorber, Ch., Schwarzmeier, J., Gasché, C., Reinisch, W., Hilgarth, M., Keil, F., Thomssen, C., Kolb, H. J., Holler, E., Wilmanns, W., Tilg, H., Gächter, A., Panzer-Grümayer, E. R., Majdic, O., Kersey, J. H., Petzer, A. L., Bilgeri, R., Zilian, U., Geisen, F. H., Haun, M., Konwalinka, G., Fuchs, D., Zangerle, R., Artner-Dworzak, E., Weiss, G., Fritsch, P., Tilz, G. P., Dierich, M. P., Wachter, H., Schüller, J., Czejka, M. J., Jäger, W., Meyer, B., Weiss, C., Schernthaner, G., Marosi, Ch., Onderka, E., Schlögl, B., Maca, T., Hanak, R., Mannhalter, Ch., Brenner, B., Mayer, R., Langmann, A., Langmann, G., Slave, J., Poier, E., Stücklschweiger, G., Hackl, A., Fritz, A., Pabinger, I., Willfort, A., Groiss, E., Bernhart, M., Waldner, R., Krieger, O., Nowotny, H., Strobl, H., Michlmayr, G., Mistrik, M., lstvan, L., Kapiotis, S., Laczika, K., Speiser, W., Granena, A., Hermans, J., Zwaan, F., Gratwohl, A., Labar B., Mrsić M., Nemet D., Bogdanić V., Radman I., Zupančić-Šalek Silva, Kovačević-Metelko Jasna, Aurer I., Forstinger, C., Scholten, C., Kier, P., Kalhs, P., Schwinger, W., Slavc, I., Lackner, H., Nussbaumer, W., Fritsch, E., Fink, M., Zechner, O., Kührer, I., Kletter, V., Frey, S., Leitgeb, C., Fritz, E., Silly, H., Brezinschek, R., Kuss, I., Stöger, H., Schmid, M., Samonigg, H., Wilders-Truschnig, M., Schmidt, F., Bauernhofer, T., Kasparek, A. K., Ploner, F., Stoeger, H., Moser, R., Leikauf, W., Klemm, F., Pfeffel, F., Niessner, H., Poschauko, H., Pojer, E., Locker, G. J., Braun, J., Gnant, M. F. X., Michl, I., Pirker, R., Liebhard, A., Zielinski, C., Dittrich, C., Bernát, S. I., Pongrácz, E., Kastner, J., Raderer, M., Jorbenyi, Z., Yilmaz, A., Suardet, L., Lahm, H., Odartchenko, N., Varga, Gy., Sréter, L. A., Oberberg, D., Berdel, W. E., Budiman, R., Brand, C., Berkessy, S., Radványi, G., Pauker, Zs., Nagy, Zs., Karádi, Å., Serti, S., Hainz, R., Kirchweger, P., Prager, C., Prada, J., Neifer, S., Bienzle, U., Kremsner, P., Kämmerer, B., Vetterlein, M., Pohl, W., Letnansky, K., Imre, S. G., Parkas, T., Lakos, Zs., Kiss, A., Telek, B., Felszeghy, E., Kelemen, E., Rak, K., Pfeilstöcker, M., Reisner, R., Salamon, J., Georgopoulos, A., Feistauer, S., Georgopoulos, M., Graninger, W., Klinda, F., Hrubisko, M., Sakalova, A., Weißmann, A., Röhle, R., Fortelny, R., Gutierrez, F., Fritsch, G., Printz, D., Buchinger, P., Buchinger, P., Hoecker, P., Peters, C., Gebauer, E., Katanić, D., Nagy, Á., Szomor, Á., Med. J., Batinić D., Užaervić B., Marušić M., Kovačoević-Metelko Jasminka, Jakić-Razumović Jasminka, Kovačević-Metelko Jasminka, Zuoancić-Šalek Silva, Ihra, G. C., Reinisch, W. W., Hilgarth, M. F., Schwarzmeier, I. D., Várady, E., Molnár, Z. S., Fleischmann, T., Borbényi, Z., Bérczi, M., István, L., Szerafin, L., Jakó, J., Bányai, A., Dankó, K., Szegedi, Gy., Neubauer, M., Frudinger, A., Scholten, Ch., Forstinger, Ch., Dobrić I., Willheim, M., Szépfalusi, Z., Mader, R., Boltz, G., Schwarzmeier, J. D., Nahajevszky, S., Téri, N., Póth, I., Nagy, P., Smanykó, D., Babicz, T., Ujj, Gy., Iványi, J. L., Tóth, F. D., Kiss, J., Konja, J., Petković, I., Kardum, I., Kaštelan, M., Kelečić, J., Feminić, R., Djermanović, M., Bilić, E., Jakovljević, G., Peter, B., Gredelj, G., Senji, P., Thalhammer, F., Floth, A., Etele-Hainz, A., Kainberger, F., Radaszkiewicz, T., Kierner, H., Mód, Anna, Pitlik, E., Gottesman, M., Magócsi, Mária, Sarkadi, B., Knapp, S., Purtscher, B., DelleKarth, G., Jaeger, U., Krieger, O., Berger, W., Elbling, L., Ludescher, C., Hilbe, W., Eisterer, W., Preuß, E., Izraeli, S., Janssen, J. W. G., Walther, J. U., Kovar, H., Ludwig, W. D., Rechavi, G., Bartram, C. R., Rehberger, A., Mittermayer, F., Schauer, E., Kokoschka, E. M., Kammerer, B., Kokron, E., Desser, L., Abdul-Hamid, G., Kroschinksky, F., Luther, Th., Fischer, H., Nowak, R., Wolf, H., Fleischer, J., Wichmann, G., Albercht, S., Adorf, D., Kaboth, W., Nerl, C., Aman, J., Rudolf, G., Peschel, C., Anders, O., Burstein, Ch., Ernst, B., Steiner, H., Konrad, H., Annaloro, U. P., Mozzana, C., Butti, R., Della, C., Volpe A., Soligo D., Uderzo M., Lambertenghi-Deliliers G., Ansari, H., Dickson, D., Hasford, J., Hehlmann, R., Anyanwu, E., Krysa, S., Bülzebrück, H., Vogt-Moykopf, I., Arning, M., Südhoff, Th., Kliche, K. O., Wehmeier, A., Schneider, W., Arnold, R., Bunjes, D., Hertenstein, B., Hueske, D., Stefanic, M., Theobald, M., Wiesneth, M., Heimpel, H., Waldmann, H., Arseniev, L., Bokemeyer, C., Andres, J., Könneke, A., Papageorgiou, E., Kleine, H. -D., Battmer, K., Südmeyer, I., Zaki, M., Schmoll, H. -J., Stangel, W., Poliwoda, H., Link, H., Aul, C., Runde, V., Heyll, A., Germing, U., Gattermann, N., Ebert, A., Feinendegen, L. E., Huhn, D., Bergmann, L., Dönner, H., Hartlapp, J. H., Kreiter, H., Schuhmacher, K., Schalk T., Sparwasser C., Peschel U., Fraaß C. Huber, HIadik, F., Kolbe, K., Irschick, E., Bajko, G., Wozny, T., Hansz, J., Bares, R., Buell, U., Baumann, I., Harms, H., Kuse, R., Wilms, K., Müller-Hermelink, H. K., Baurmann, H., Cherif, D., Berger, R., Becker, K., Zeller, W., Helmchen, U., Hossfeld, D. K., Bentrup, I., Plusczyk, T., Kemkes-Matthes, B., Matthes, K., Bentz, M., Speicher, M., Schröder, M., Moos, M., Döhner, H., Lichter, P., Stilgenbauer, S., Korfel, A., Harnoss, B. -M., Boese-Landgraf, J., May, E., Kreuser, E. -D., Thiel, E., Karacas, T., Jahn, B., Lautenschläger, G., Szepes, S., Fenchel, K., Mitrou, P. S., Hoelzer, D., Heil, G., Lengfelder, E., Puzicha, E., Martin, H., Beyer, J., Kleiner, S., Strohscheer, I., Schwerdtfeger, R., Schwella, N., Schmidt-Wolf, I., Siegert, W., Weyer, C., arzen, G., Risse, G., Miksits, K., Farshidfar, G., Birken, R., Schilling, C. v., Brugger, W., Holldack, J., Mertelsmann, R., Kanz, L., Blanz, J., Mewes, K., Ehninger, G., Zeller, K. -P., Böhme. A., Just G., Bergmann. L., Shah P., Hoelzer D., Stille W., Bohlen, H., Hopff, T., Kapp, U., Wolf, J., Engert, A., Diehl, V., Tesch, H., Schrader, A., van Rhee, J., Köhne-Wömpner, H., Bokemeyer', C., Gonnermann, D., Harstrick, A., Schöffski, P., van Rhee, J., Schuppert, F., Freund, M., Boos, J., Göring, M., Blaschke, G., Borstel, A., Franke, A., Hüller, G., Uhle, R., Weise, W., Brach, Marion A., Gruss, Hans-Jürgen, Herrmann, Friedhelm, deVos, Sven, Brennscheidt, Ulrich, Riedel, Detlev, Klch, Walter, Bonlfer, Renate, Mertelsmann, Roland, Brieaer, J., Appelhans, H., Brückner, S., Siemens, HJ., Wagner, T., Moecklin, W., Mertelsmann, R., Bertz, H., Hecht, T., Mertelsmann, R., Bühl, K., Eichelbaum, M. G., Ladda, E., Schumacher, K., Weimer, A., Bühling, F., Kunz, D., Lendeckel, U., Reinhold, D., Ulmer, A. J., Flad, H. -D., Ansorge, S., Bühring, Hans-Jörg, Broudy¶, Virginia C., Ashman§, Leonie K., Burk, M., Kunecke, H., Dumont, C., Meckenstock, G., Volmer, M., Bucher, M., Manegold, C., Krenpien, B., Fischer, J. R., Drings, P., Bückner, U., Donhuijsen-Ant, R., Eberhardt, B., Westerhausen, M., Busch, F. W., Jaschonek, K., Steinke, B., Calavrezos, A., Hausmann, K., Solbach, M., Woitowitz, H. -P., Hilierdal, G., Heilmann, H. -P., Chen, Z. J., Frickhofen, N., Ellbrück, D., Schwarz, T. F., Körner, K., Wiest, C., Kubanek, B., Seifried, E., Claudé, R., Brücher, J., Clemens, M. R., Bublitz, K., Bieger, O., Schmid, B., Clemetson, K. J., Clemm, Ch., Bamberg, M., Gerl, A., Weißbach, L., Danhauser-Riedl, S., Schick, H. D., Bender, R., Reuter, M., Dietzfelbinger, H., Rastetter, J., Hanauske, A. -R., Decker, Hans-Jochen, Klauck, Sabine, Seizinger, Bernd, Denfeld, Ralf, Pohl, Christoph, Renner, Christoph, Hombach, Andreas, Jung, Wolfram, Schwonzen, Martin, Pfreundschuh, Michael, Derigs, H. Günter, Boswell, H. Scott, Kühn, D., Zafferani, M., Ehrhardt, R., Fischer, K., Schmitt, M., Witt, B., Ho, A. D., Haas, R., Hunstein, W., Dölken, G., Finke, J., Lange, W., Held, M., Schalipp, E., Fauser, A. A., Mertelsmann, R., Donhuijsen, K., Nabavi, D., Leder, L. D., Haedicke, Ch., Freund, H., Hattenberger, S., Dreger, Peter, Grelle, Karen, Schmitz, Norbert, Suttorp, Meinolf, Müller-Ruchholtz, Wolfgang, Löffler, Helmut, Dumoulin, F. L., Jakschies, D., Walther, M., Hunger, P., Deicher, H., von Wussow, P., Dutcher, J. P., Ebell, W., Bender-Götze, C., Bettoni, C., Niethammer, D., Reiter, A., Sauter, S., Schrappe, M., Riehm, H., Niederle, N., Heidersdorf, H., Müller, M. R., Mengelkoch, B., Vanhoefer, U., Stahl, M., Budach, V., loehren, B., Alberti, W., Nowrousian, M. R., Seeber, S., Wilke, H., Stamatis, G., Greschuchna, D., Sack, H., Konietzko, N., Krause, B., Dopfer, R., Schmidt, H., Einsele, H., Müller, C. A., Goldmann, S. F., Grosse-Wilde, H., Waller, H. D., Libal, B., Hohaus, S., Gericke, G., von Eiff, M., Oehme, A., Roth, B., van de Loo, J., von Eiff, K., Pötter, R., Weiß, H., Suhr, B., Koch, P., Roos, H., van de Loo, J., Meuter, V., Heissig, B., Schick, F., Duda, S., Saal, J. G., Klein, R., Steidle, M., Eisner, S., Ganser, A., Seipelt, G., Leonhardt, M., Engelhard, M., Brittinger, G., Gerhartz, H., Meusers, P., Aydemir, Ü., Tintrup, W., Tiemann, H., Lennert, K., Esser, B., Hirsch, F. W., Evers, C., Riess, H., Lübbe, A., Greil, R., Köchling, A., Digel, D., Bross, K. J., Dölken, G., Mertelsmann, R., Gencic S., Ostermann, M., Baum, R. P., Fiebig, H. H., Berger, D. P., Dengler, W. A., Winterhalter, B. R., Hendriks, H., Schwartsmann, G., Pinedo, H. M., Ternes, P., Mertelsmann, R., Dölken, G., Fischbach, W., Zidianakis, Z., Lüke, G., Kirchner, Th., Mössner, J., Fischer, Thomas, Haque, Saikh J., Kumar, Aseem, Rutherford, Michael N., Williams, Bryan R. G., Flohr, T., Decker, T., Thews, A., Hild, F., Dohmen, M., von Wussow, P., Grote-Metke, A., Otremba, B., Fonatsch, C., Binder, T., Imhof, C., Feller, A. C., Fruehauf, S., Moehle, R., Hiddemann Th., Büchner M. Unterhalt, Wörmann, B., Ottmann, O. G., Verbeek, G. W., Seipelt A. Maurer, Geissler, G., Schardt, C., Reutzel, R., Hiddemann, W., Maurer, A., Hess, U., Lindemann, A., Frisch, J., Schulz, G., Mertelsmann, R., Hoelzer, P., Gassmann, W., Sperling, C., Uharek, L., Becher, R., Weh, H. J., Tirier, C., Hagemann, F. G., Fuhr, H. G., Wandt, H., Sauerland, M. C., Gause, A., Spickermann, D., Klein, S., Pfreund-schuh, M., Gebauer, W., Fallgren-Gebauer, E., Geissler, R. G., Mentzel, U., Kleiner, K., Rossol, R., Guba, P., Kojouharoff, G., Gerdau, St., Körholz, D., Klein-Vehne, A., Burdach, St., Gerdemann M., Maurer J., Gerhartz, H. H., Schmetzer, H., Mayer, P., Clemm, C., Hentrich, M., Hartenstein, R., Kohl, P., Gieseler, F., Boege, F., Enttmann, R., Meyer, P., Glass, B., Zeis, M., Loeffler, H., Mueller-Ruchholtz, W., Görg, C., Schwerk, W. B., Köppler, H., Havemann, K., Goldschmitt, J., Goldschmidt, H., Nicolai, M., Richter, Th., Blau, W., Hahn, U., Kappe, R., Leithäuser, F., Gottstein, Claudia, Schön, Gisela, Dünnebacke, Markus, Berthold, Frank, Gramatzki, M., Eger, G., Geiger, M., Burger, R., Zölch, A., Bair, H. J., Becker, W., Griesinger, F., Elfers, H., Griesser, H., Grundner-Culemann, E., Neubauer, V., Fricke, D., Shalitin, C., Benter, T., Mertelsmann, R., Dölken, Gottfried, Mertelsmann, Roland, Günther, W., Schunmm, M., Rieber, P., Thierfelder, S., Gunsilius, E., Kirstein, O., Bommer, M., Serve, H., Hülser, P. -J., Del Valle F., Fischer J. Th., Huberts H., Kaplan E., Haase, D., Halbmayer, W. -M., Feichtinger, Ch., Rubi, K., Fischer, M., Hallek, M., Lepislo, E. M., Griffin, J. D., Emst, T. J., Druker, B., Eder, M., Okuda, K., D.Griffin, J., Kozłowska-Skrzypczak, K., Meyer, B., Reile, D., Scharnofske, M., Hapke, G., Aulenbacher, P., Havemann, K., Becker, N., Scheller, S., Zugmaier, G., Pralle, H., Wahrendorf, J., Heide, Immo, Thiede, Christian, de Kant, Eric, Neubauer, Andreas, Herrmann, Richard, Rochlitz, Christoph, Heiden, B., Depenbrock, H., Block, T., Vogelsang, H., Schneider, P., Fellbaum, Ch., Heidtmann, H. -H., Blings, B., Havemann, K., Fackler-Schwalbe, E., Schlimok, G., Lösch, A., Queißer, W., Löffler, B., Kurrle, E., Chadid, L., Lindemann, A., Mertelsmann, R., Nicolay, U., Gaus, W., Heinemann, V., Jehn, U., Gleixner, B., Wachholz, W., Scholz, P., Plunkett, W., Heinze, B., Novotny, J., Hess, Georg, Gamm, Heinold, Seliger, Barbara, Heuft, H. G., Oettle, H., Zeiler, T., Eckstein, R., Heymanns, J., Havemann, K., Hladik, F., Hoang-Vu, C., Horn, R., Cetin, Y., Scheumann, G., Dralle, H., Köhrle, J., von zur Mühlen, A., Brabant, G., Hochhaus, A., Mende, S., Simon, M., Fonatsch, Ch., Heinze, B., Georgii, A., Hötzl, Ch., Hintermeier-Knabe, R., Kempeni, J., Kaul, M., Hoetzl, Ch., Clemm, Ch., Lauter, H., Hoffknecht, M. M., Eckardt, N., Hoffmann-Fezer, G., Gall, C., Kranz, B., Zengerle, U., Pfoersich, M., Birkenstock, U., Pittenann, E., Heinz, B., Hosten, N., Schörner, W., Kirsch, A., Neumann, K., Felix, R., Humpe, A., Kiss, T., Trümper, L. H., Messner, H. A., Hundt, M., Zielinska-Skowronek, M., Schubert, J., Schmidt, R. E., Huss, R., Storb, R., Deeg, H. J., Issels, R. D., Bosse, D., Abdel-Rahman, S., Jaeger, M., Söhngen, D., Weidmann, E., Schwulera, U., Jakab, I., Fodor, F., Pecze, K., Jaques, G., Schöneberger, H. -J., Wegmann, B., Grüber, A., Bust, K., Pflüger, K. -H., Havemann, K., Faul, C., Wannke, B., Scheurlen, M., Kirchner, M., Dahl, G., Schmits, R., Fohl, C., Kaiser, U., Tuohimaa, P., Wollmer, E., Aumüller, G., Havemann, K., Kolbabek, H., Schölten, C., Popov-Kraupp, B., Emminger, W., Hummel, M., Pawlita, M., v.Kalle, C., Dallenbach, F., Stein, H., Krueger, G. R. F., Müller-Lantzsch, N., Kath, R., Höffken, K., Horn, G., Brockmann, P., Keilholz, U., Stoelben, E., Scheibenbogen, C., Manasterski, M., Tilgen, W., Schlag, P., Görich, J., Kauffmann, G. W., Kempter, B., Rüth, S., Lohse, P., Khalil, R. M., Hültner, L., Mailhammer, R., Luz, A., Hasslinger, M. -A., Omran, S., Dörmer, P., Kienast, J., Kister, K. P., Seifarth, W., Klaassen, U., Werk, S., Reiter, W. W., Klein, G., Beck-Gessert, S., Timpl, R., Hinrichs, H., Lux, E., Döring, G., Scheinichen, D., Döring, G., Wernet, P., Vogeley, K. T., Richartz, G., Südhoff, T., Horstkotte, D., Klocker, J., Trotsenburg, M. v., Schumer, J., Kanatschnig, M., Henning, K., Knauf, W. U., Pottgießer, E., Raghavachar, A., Zeigmeister, B., Bollow, M., Schilling, A., König, H., Koch, M., Volkenandt, M., Seger, Andrea, Banerjee, D., Vogel, J., Bierhoff, E., Heidi, G., Neyses, L., Bertino, J., Kocki, J., Rozynkowa, D. M., M.Rupniewska, Z., Wojcierowski, J., König, V., Hopf, U., Koenigsmann, M., Streit, M., Koeppen, K. M., Martini, I., Poppy, U., Hardel, M., Havemann, K., Havemann, K., Clemm, Ch., Wendt, Th., Gauss, J., Kreienberg, R., Hohenfellner, R., Krieger, O., Istvan, L., Komarnicki, M., Kazmierczak, M., Haertle, D., Korossy, P., Haus, S. Kotlarek, Gabryś, K., Kuliszkiewicz-Janus, M., Krauter, J., Westphal, C., Werner, K., Lang, P., Preissner, K. T., Völler, H., Schröder, K., Uhrig, A., Behles, Ch., Seibt-Jung, H., Besserer, A., Kreutzmann, H., Kröning, H., Kähne, T., Eßbach, U., Kühne, W., Krüger, W. H., Krause, K., Nowicki, B., Stockschläder, M., Peters, S. O., Zander, A. R., Kurowski, V., Schüler, C., Höher, D., Montenarh, M., Lang, W., Schweiger, H., Dölken, Gottfried, Lege, H., Dölken, G., Wex, Th., Frank, K., Hastka, J., Bohrer, M., Leo, R., Peest, D., Tschechne, B., Atzpodien, J., Kirchner, H., Hein, R., Hoffmann, L., Stauch, M., Franks, C. R., Palmer, P. A., Licht, T., Mertelsmann, R., Liersch, T., Vehmeyer, K., Kaboth, U., Maschmeyer, G., Meyer, P., Helmerking, M., Schmitt, J., Adam, D., Prahst, A., Hübner, G., Meisner, M., Seifert, M., Richard, D., Yver, A., Spiekermann, K., Brinkmann, L., Battmer, K., Krainer, M., Löffel, J., Stahl, H., Wust, P., Lübbert, M., Schottelius, A., Mertelsmann, R., Henschler, R., Mertelsmann, R., Mapara, M. Y., Bargou, R., Zugck, C., Krammer, P. H., Dörken, B., Maschek, Hansjörg, Kaloutsi, Vassiliki, Maschek, Hansjörg, Gormitz, Ralf, Meyer, P., Kuntz, B. M. E., Mehl, B., Günther, I., Bülzebruck, H., Menssen, H. D., Mergenthaler, H. -G., Dörmer, P., Heusers, P., Zeller, K. -P., Enzinger, H. M., Neugebauer, T., Klippstein, T., Burkhardt, K. L., Putzicha, E., Möller, Peter, Henne, Christof, Eichelmann, Anette, Brüderlein, Silke, Dhein, Jens, Möstl, M., Krieger, O., Mucke, H., Schinkinger, M., Moiling, J., Daoud, A., Willgeroth, Ch., Mross K., Bewermeier P., Krüger W., Peters S., Berger C., Bohn, C., Edler, L., Jonat, W., Queisser, W., Heidemann, E., Goebel, M., Hamm, K., Markovic-Lipkovski, J., Bitzer, G., Müller, H., Oethinger, M., Grießhammer, M., Tuner, I., Musch E., Malek, M., Peter-Katalinic, J., Hügl, E., Helli, A., Slanicka, M., Filipowicz, A., Nissen, C., Speck, B., Nehls, M. C., Grass, H. -J., Dierbach, H., Mertelsmann, R., Thaller, J., Fiebeler, A., Schmidt, C. A., O'Bryan, J. P., Liu, E., Ritter, M., de Kant, E., Brendel, C., He, M., Dodge, R., George, S., Davey, F., Silver, R., Schiffer, C., Mayer, R., Ball, E., Bloomfield, C., Ramschak, H., Tiran, A., Truschnig-Wilders, M., Nizze, H., Bühring, U., Oelschlägel, U., Jermolow, M., Oertel, J., Weisbach, V., Zingsem, J., Wiens, M., Jessen, J., Osthoff, K., Timm, H., Wilborn, F., Bodak, K., Langmach, K., Bechstein, W., Blumhardt, G., Neuhaus, P., Olek, K., Ottinger, H., Kozole, G., Belka, C., Meusers, P., Hense, J., Papadileris, Stefan, Pasternak, G., Pasternak, L., Karsten, U., Pecherstorfer, M., Zimmer-Roth, I., Poloskey, A., Petrasch, S., Kühnemund, O., Uppenkamp, M., Lütticken, R., Kosco, M., Schmitz, J., Petrides, Petro E., Dittmann, Klaus H., Krieger, O., Pflueger, K. -H., Grueber, A., Schoeneberger, J., Wenzel, E., Havemann, K., Pies, A., Kneba, M., Edel, G., Pohl, S., Bulgay-Mörschel, M., Polzin, R., Issing, W., Clemm, Ch., Schorn, K., Ponta, H., Zöller, M., Hofmann, M., Arch, R., Heider, K. -H., Rudy, W., Tölg, C., Herrlich, P., Prümmer, O., Scherbaum, W. A., Porzsolt, F., Prümmer, O., Krüger, A., Schrezenmeier, H., Schlander, H., Pineo, G., Marin, P., Gluckman, E., Shahidi, N. T., Bacigalupo, A., Ratajczak, M. Z., Gewirtz, A. M., Ratei, R., Borner, K., Bank, U., Bühling, F., Reisbach, G., Bartke, L., Kempkes, B., Kostka, G., Ellwart, X., Birner, A., Bornkamm, G. W., Ullrich, A., Dörmer, P., Henze, G., Parwaresch, R., Müller-Weihrich, S. T., Klingebiel, Th., Odenwald, E., Brandhorst, D., Tsuruo, T., Wetter, O., Renner, C., Pohl, C., Sahin, U., Renner, U., Zeller, K. -P., Repp, R., Valerius, Th., Sendler, A., Kalden, J. R., PIatzer, E., Reuss-Borst, M. A., Bühring, H. J., Reuter, C., der Landwehr, II, U. Auf, der Landwehr, II, U. Auf, Schleyer, E., Rolf, C., Ridwelski, K., Matthias, M., Preiss, R., Riewald, M., Puzo, A., Serke, S., Rohrer, B., Pfeiffer, D., Hepp, H., Romanowski, R., Schött, C., Rüther, U., Rothe, B., Pöllmann, H., Nunnensiek, C., Schöllhammer, T., Ulshöfer, Th., Bader, H., Jipp, P., Müller, H. A. G., Rupp, W., Lüthgens, M., Eisenberger, F., Afflerbach, C., Höller, A., Schwamborn, J. S., Daus, H., Krämer, K., Pees, H., Salat, C., Reinhardt, B., Düll, T., Knabe, H., Hiller, E., Sawinski, K., Schalhorn, A., Kühl, M., Heil, K., Schardt, Ch., Drexler, H. G., Scharf, R. E., Suhijar, D., del Zoppo, G. J., Ruggeri, Z. M., Roll, T., Möhler, T., Giselinger, H., Knäbl, P., Kyrie, P. A., Lazcíka, K., Lechner, X., Scheulen, M. E., Beelen, D. W., Reithmayer, H., Daniels, R., Weiherich, A., Quabeck, K., Schaefer, U. W., Reinhardt J., Grimm M., Unterhalt M., Schliesser, G., Lohmeyer, J., Schlingheider, O., von Eiff, M., Schulze, F., Oehme, C., van de Loo, J., Schlögl E., Bemhart M., Schmeiser, Th., Rozdzinski, E., Kern, W., Reichle, A., Moritz, T., Merk, Bruno, Schmid, R. M., Perkins, N. D., Duckett, C. S., Leung, K., Nabel, G. J., Pawlaczyk-Peter, B., Kellermann-Kegreiß, Schmidt E., Steiert, I., Schmidt-Wolf, G., Schmidt-Wolf, I. G. H., Schlegel, P., Blume, K. G., Chao, N. J., Lefterova, P., Laser, J., Schmitz, G., Rothe, G., Schönfeld, S., Schulz, S., Nyce, J. W., Graf, N., Ludwig, R., Steinhauser, I., Brommer, A. E., Qui, H., Schroeder, M., Grote-Kiehn, J., Bückner, U., Rüger, I., Schröder, J., Meusers, P., Weimar, Ch., Schoch, C., Schröter, G., Stern, H., Buchwald, B., Schick, K., Avril, N., Flierdt, E. v. d., Langhammer, H. R., Pabst, H. W., Alvarado, M., Witte, T., Vogt, H., Schuler, U., Brammer, K., Klann, R. C., Schumm, M., Hahn, J., Günther, W., Wullich, B., Moringlane, J. R., Schöndorf, S., Schwartz, S., Bühring, H. -J., Notter, M., Böttcher, S., Martin, M., Schmid, H., Lübbe, A. S., Leib-Mösch C., Wankmüller, H., Eilbrück, D., Funke, I., Cardoso, M., Duranceyk, H., Seitz, R., Rappe, N., Kraus, H., Egbring, R., Haasberg, M., Havemann, K., Seibach, J., Wollscheid, Ursula, Serke, St., Zimmermann, R., Shirai, T., Umeda, M., Anno, S., Kosuge, T., Katoh, M., Moro, S., Su, C. -Y., Shikoshi, K., Arai, N., Schwieder, G., Silling-Engelhardt, G., Zühlsdorf, M., Aguion-Freire-Innig, E., van de Loo, J., Stockdreher, K., Gatsch, L., Tischler, H. -J., Ringe, B., Diedrich, H., Franzi, A., Kruse, E., Lück, R., Trenn, G., Sykora, J., Wen, T., Fung-Leung, W. P., Mak, T. W., Brady, G., Loke, S., Cossman, J., Gascoyne, R., Mak, T., Urasinski, I., Zdziarska, B., Usnarska-Zubkiewicz, L., Kotlarek-Haus, S., Sciborskl, R., Nowosad, H., Kummer, G., Schleucher, N., Preusser, P., Niebel, W., Achterrath, W., Pott, D., Eigler, F. -W., Venook, A., Stagg, R., Frye, J., Gordon, R., Ring, E., Verschuer, U. v., Baur, F., Heit, W., Corrons, J. L. L. Vives, Vogel, M., Nekarda, H., Remy, W., Bissery, M. C., Aapro, M., Buchwald-Pospiech, A., Kaltwasser, J. P., Jacobi, V., de Vos, Sven, Asano, Yoshinobu, Voss, Harald, Knuth, Alexander, Wiedemann, G., Komischke, B., Horisberger, R., Wussow, P. v., Wanders, L., Senekowitsch, R., Strohmeyer, S., Emmerich, B., Selbach, J., Gutensohn, K., Wacker-Backhaus, G., Winkeimann, M., Send, W., Rösche, J., Weide, R., Parviz, B., Havemann, K., Weidmann, B., Henss, H., Engelhardt, R., Bernards, P., Zeidler, D., Jägerbauer, E., Colajori, E., Kerpel-Fronius, S., Weiss, A., Buchheidt, D., Döring, A., D.Saeger, H., Weissbach, L., Emmler, J., Wermes, R., Meusers, P., Flasshove, M., Skorzec, M., Käding, J., Platow, S., Winkler, Ute, Thorpe, Philip, Winter, S. F., Minna, J. D., Nestor, P. J., Johnson, B. E., Gazdar, A. F., Havemann, K., Carbone, D. P., Wit, M. de, Bittner, S., Hossfeld, D., Wittmann, G., Borchelt, M., Steinhagen-Thiessen, E., Koch, K., Brosch, T., Haas, N., Wölfel, C., Knuth, A., Wölfel, T., Safford, M., Könemann, S., Zurlutter, K., Schreiber, K., Piechotka, K., Drescher, M., Toepker, S., Terstappen, L. W. M. M., Bullerdiek, J., Jox, A., zur Hausen, H., Wolters, B., Stenzinger, W., Woźny, T., Sawiński, K., Kozłowska-Skrzypczak, M., Wussow, P. v., Hochhaus, T., Ansarl, H., Prümmer, O., Zapf, H., Thorban, S., Präuer, H., Zeller, W., Stieglitz, J. v., Dürken, M., Greenshaw, C., Kabisch, H., Reuther, C., Knabbe, C., Lippman, M., Havemann, K., Wellstein, A., Degos, L., Castaigne, S., Fenaux, P., Chomienne, C., Raza, A., Preisler, H. D., PEG Interventional Antimicrobial Strategy Study Group, Interventional Antimicrobial Strategy Study Group of the Paul Ehrlich Society (PEG), and H. Riehm for the BFM study group

Published
1992
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18. Radiation Safety at FLUTE with Special Emphasis on Activation Issues

Author

Wesolowski, P., B��hm, A., Br��ndermann, E., Hagelstein, M., Malygin, A., Marsching, S., M��ller, A.-S., Nasse, M. J., Ruprecht, R., Smale, N., Schmelzer, T., Schuh, M., and Zwernemann, Olaf

Subjects
Technology, ddc:600
Abstract

The accelerator FLUTE (name abbreviation derived from its German name: Ferninfrarot Linac- und TestExperiment) has been set up in cooperation with DESY and PSI [1]. The electron source and diagnostics has commenced operation. General safety issues of FLUTE are covered in this paper. The activation of the accelerator and vacuum parts were predicted previously [2]. The attention is given to the activation of aluminum and impurities in the electron absorber of the beam dump. Potential air activation in the experimental hall is also discussed.

Published
2019

20. Image charge shift in high-precision Penning traps

Author

Schuh, M., primary, Heiße, F., additional, Eronen, T., additional, Ketter, J., additional, Köhler-Langes, F., additional, Rau, S., additional, Segal, T., additional, Quint, W., additional, Sturm, S., additional, and Blaum, K., additional

Published
2019
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21. High Repetition-Rate Electro-optic Sampling: Recent Studies Using Photonic Time-Stretch

Author

Evain, C., Szwaj, C., Roussel, E., Le Parquier, M., Bielawski, S., Brubach, J.-B., Manceron, L., Tordeux, M.-A., Labat, M., Roy, P., Hiller, N., Blomley, E., Funkner, S., Bründermann, E., Nasse, M. J., Niehues, G., Schönfeldt, P., Schuh, M., Steinmann, J. L., Walter, S., Müller, A.-S., Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), and Centre National de la Recherche Scientifique (CNRS)

Subjects
electron, Technology, 010308 nuclear & particles physics, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], photon, 01 natural sciences, laser, Accelerator Physics, 0103 physical sciences, Physics::Accelerator Physics, ion, 4 Time-Resolved Diagnostics and Synchronization, 010306 general physics, bunching, ddc:600
Abstract

Single-shot electro-optic sampling (EOS) is a powerful characterization tool for monitoring the shape of electron bunches, and coherent synchrotron radiation pulses. For reaching high acquisition rates, an efficient possibility consists to associate classic EOS systems with the so-called photonic time-stretch technique [1]. We present recent results obtained at SOLEIL and ANKA using this strategy. In particular, we show how a high sensitivity variant of photonic time stretch [2] EOS enabled to monitor the CSR pulses emitted by short electron bunches at SOLEIL [3]. We could thus confirm in a very direct way the theories predicting an interplay between two physical processes. Below a critical bunch charge, we observe a train of identical THz pulses stemming from the shortness of the electron bunches. Above this threshold, CSR emission is dominated by drifting structures appearing through spontaneous self-organization. We also consider the association of time-stretch and EOS for recording electron bunch near fields at high repetition rate. We present preliminary results obtained at ANKA, aiming at recording the electron bunch shape evolution during the microbunching instability., Proceedings of the 6th Int. Beam Instrumentation Conf., IBIC2017, Grand Rapids, MI, USA

Published
2018
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22. Gigaflop (billion floating point operations per second) performance for computational electromagnetics

Author

Shankar, V, Rowell, C, Hall, W. F, Mohammadian, A. H, Schuh, M, and Taylor, K

Subjects
Computer Programming And Software
Abstract

Accurate and rapid evaluation of radar signature for alternative aircraft/store configurations would be of substantial benefit in the evolution of integrated designs that meet radar cross-section (RCS) requirements across the threat spectrum. Finite-volume time domain methods offer the possibility of modeling the whole aircraft, including penetrable regions and stores, at longer wavelengths on today's gigaflop supercomputers and at typical airborne radar wavelengths on the teraflop computers of tomorrow. A structured-grid finite-volume time domain computational fluid dynamics (CFD)-based RCS code has been developed at the Rockwell Science Center, and this code incorporates modeling techniques for general radar absorbing materials and structures. Using this work as a base, the goal of the CFD-based CEM effort is to define, implement and evaluate various code development issues suitable for rapid prototype signature prediction.

Published
1992
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26. Single-Shot Electro-Optical Diagnostics at the ANKA Storage Ring

Author

Hiller, N., Borysenko, A., Hertle, E., Judin, V., Kehrer, B., Müller, A. -S, Nasse, M. J., Schönfeldt, P., Schuh, M., Smale, N. J., Johannes Leonhard Steinmann, Steffen, B., Peier, P., and Schlott, V.

Subjects
ddc:620, Engineering & allied operations
Published
2015

27. TEENS WITH CONGENITAL HEART DISEASE IN TRANSITION FROM PEDIATRIC TO ADULT CARE: QUALITATIVE EVALUATION OF NURSE-LED INTERVENTION TO SUPPORT TRANSITION READINESS

Author

Charles, S., primary, Rempel, G.R., additional, Rogers, L.G., additional, Rankin, K.N., additional, Williams, E., additional, Schuh, M., additional, Dragieva, D., additional, Mustafa, S., additional, Anthony, S., additional, Jelen, A., additional, Kaufman, M., additional, Kovacs, A.H., additional, McCrindle, B., additional, Nicholas, D., additional, Oechslin, E., additional, Sananes, R., additional, and Mackie, A.S., additional

Published
2016
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28. Conceptual Design of the Low-Power and High-Power SPL: A Superconducting H$^-$ Linac at CERN

Author

Gerigk, F, Atieh, S, Aviles Santillana, I, Bartmann, W, Borburgh, J, Brunner, O, Calatroni, S, Capatina, O, Chambrillon, J, Ciapala, E, Eshraqi, M, Ferreira, L, Garoby, R, Goddard, B, Hessler, C, Hofle, W, Horvath-Mikulas, S, Junginger, T, Kozlova, E, Lebbos, E, Lettry, J, Liao, K, Lombardi, A M, Macpherson, A, Montesinos, E, Nisbet, D, Otto, T, Paoluzzi, M, Papke, K, Parma, V, Pillon, F, Posocco, P, Ramberger, S, Rossi, C, Schirm, K, Schuh, M, Scrivens, R, Torres Sanchez, R, Valuch, D, Valverde Alonso, N, Wegner, R, Weingarten, W, and Weisz, S

Subjects
Accelerators and Storage Rings
Abstract

The potential for a superconducting proton linac (SPL) at CERN started to be seriously considered at the end of the 1990s. In the first conceptual design report (CDR), published in 2000 [1], most of the 352 MHz RF equipment from LEP was re-used in an 800 m long linac, and the proton beam energy was limited to 2.2 GeV. During the following years, the design was revisited and optimized to better match the needs of a high-power proton driver for neutrino physics. The result was a more compact (470 m long) accelerator capable of delivering 5 MW of beam power at 3.5 GeV, using state-of-the-art superconducting RF cavities at 704 MHz. It was described in a second CDR, published in 2006 [2]. Soon afterwards, when preparation for increasing the luminosity of the LHC by an order of magnitude beyond nominal became an important concern, a low-power SPL (LP-SPL) was studied as a key component in the renovation of the LHC injector complex. The combination of a 4 GeV LP-SPL injecting into a new 50 GeV synchrotron (PS2) was proposed to replace the ageing Linac2, PSB, and PS. In a later stage, if necessary for future physics programmes (neutrino production or generation of radioactive ion beams), the linac could be brought up to multimegawatt beam power by upgrading the cooling, the electrical infrastructure, and the power supplies. The construction of the low-energy front end of the LP-SPL started in 2008 as the Linac4 project [3], aimed at the replacement of Linac2, with the potential for being adapted later to the needs of a low-power or high-power SPL (HP-SPL). In parallel, the R&D on the superconducting linac continued, initially to refine the design of the LP-SPL and afterwards that of the HP-SPL. This report presents the design of the LP-SPL and the work accomplished in preparing a proposal for new LHC injectors with the support of the European Commission under the Framework Programmes 6 and 7 and in collaboration with multiple laboratories and institutions worldwide. The status of the R&D towards an HP-SPL is summarized.

Published
2014

30. Simulations of the electrostatic and magnetic field properties and tests of the Penning-ion source at THe-Trap

Author

Schuh, M.

Subjects
Physics::Atomic Physics, Präzisionsexperimente - Abteilung Blaum
Abstract

The Tritium-Helium-Trap (THe-Trap) is a Penning-trap mass spectrometer dedicated to measure the mass ratio of tritium and helium-3 with a relative precision of 10-11. To reach this precision, the properties of the Penning-trap must be understood very well. Geometrical deviations from the ideal case cause higher-order components in the electrostatic potential. Extended simulations have been carried out to investigate first the dependence of the simulation tool Comsol Multiphysics on the resolution chosen and then to quantify the higher-order terms. The simulations were successful and in good agreement with the experimental observations. It was also possible to simulate the image charge effect. The simulated image charge effect confirms the experimental value. Similar investigations were performed to estimate the influence of the experimental setup on the magnetic field. The influence of ferromagnetic materials was determined reliably. The final part of this thesis is the characterization of the external Penning-ion source. For this, a new Faraday cup was designed and implemented. The new device can measure an ion beam from the Penning-ion source and helps to improve their operating parameters.

Published
2014

34. RF Bunch Compression Studies for FLUTE

Author

Schuh, M., Huttel, E., Marsching, S., Mueller, A. -S, Naknaimueang, S., Nasse, M. J., Rossmanith, R., Ruprecht, R., Schreck, M., Schwarz, M., Weber, M., Wesolowski, P., Ralph Assmann, Floettmann, K., and Schlarb, H.

Subjects
Physics::Accelerator Physics
Published
2013

37. Spectral and temporal observations of CSR at ANKA

Author

Judin, V., Hiller, N., Hofmann, A., Huttel, E., Kehrer, B., Klein, M., Marsching, S., Meuter, C., Müller, A. S., Nasse, M. J., Schuh, M., Schwarz, M., Smale, N., and Streichert, M. I.

Subjects
ddc:620, Engineering & allied operations
Published
2012
Full Text
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41. HOM issues in 704.4MHz and 1.3GHz superconducting cavities

Author

Schuh, M

Subjects
Physics::Accelerator Physics, Accelerators and Storage Rings, Astrophysics::Galaxy Astrophysics
Abstract

The basic Higher Order Modes (HOM) properties of different elliptical superconducting cavities operating at 704.4MHz and 1.3 GHz are compared for the operation in a high power proton linac.

Published
2011

42. Study of Higher Order Modes in Superconducting Accelerating Structures for Linac Applications

Author

Schuh, M.

Subjects
Physics::Accelerator Physics, Accelerators and Storage Rings
Abstract

Higher Order Modes (HOMs) can severely limit the operation of superconducting cavities in a linear accelerator with high beam current, high duty factor and complex pulse structure. Therefore, the full HOM spectrum has to be analysed in detail to identify potentially dangerous modes already during the design phase and to define their damping requirements. For this purpose a dedicated beam dynamics simulation code, Simulation of higher order Mode Dynamics (SMD), focusing on beam-HOM interaction, has been developed in the frame of this project. SMD allows to analyse the beam behaviour under the presence of HOMs, taking into account many important effects, such as for example the HOM frequency spread, beam input jitter, different chopping patterns, as well as klystron and alignment errors. SMD is used to investigate in detail into the effects of HOMs in the Superconducting Proton Linac (SPL) at CERN and in particular their potential to drive beam instabili- ties in the longitudinal and transverse direction. Based on these results, HOM damping requirements for the HOM coupler design are then defined. In addition, the linear ac- celerators of the European Spallation Source (ESS) and the Spallation Neutron Source (SNS) are analysed with respect to HOM impact and the results are compared with the SPL simulations.

Published
2011

43. FLUTE, a linac based THz source

Author

Naknaimueang, S., Baumbach, T., Gies, A., Hagelstein, M., Hiller, N., Huttel, E., Judin, V., Kehrer, B., Kubat, R., Marsching, S., Mexner, W., M̈uller, A. -S, Nasse, M., Anton Plech, Rossmanith, R., Schuh, M., Schwarz, M., Schmelling, M., Abela, R., Ganter, R., Braun, H. H., and Patterson, B.

Subjects
Physics::Accelerator Physics, ddc:620, Engineering & allied operations
Abstract

We propose a versatile THz source named FLUTE (Ferninfrarot Linac- Und Test-Experiment) based on a 30 - 50 MeV S-band linac with bunch compressor, that aimsat not only producing high field THz pulses but also at serving as a test facility to study accelerator physics issues. This source is an important step towards the planned ultra-broadband THz to mid infrared user facility TBONE. Special emphasis is put on studies of bunch compression as a function of bunch charge (0.1-5 nC) and of different generation mechanisms of coherent radiation (CSR, CER, CTR). This paper describes the design and layout of the proposed FLUTE machine and presents results of beam dynamic calculations with the tracking programs ASTRA and CSRtrack. In addition, calculations for the achievable peak electrical field and spectral characteristics for one version of the FLUTE layout are shown.

Published
2011
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44. Power dissipation by Higher Order Modes

Author

Schuh, M and Weingarten, W

Subjects
Mathematics::Category Theory, Mathematics::Rings and Algebras, Physics::Accelerator Physics, Accelerators and Storage Rings
Abstract

The additional power loss due to HOMs in cavities and HOM couplers is estimated as function of the damping with analytic and beam dynamics simulation based models. Based on these results,HOM damping requirements for the Superconducting Proton Linac (SPL) can be defined to limit the additional heat load to the watt level.

Published
2010

47. Code Benchmarking of Higher Order Modes Simulation Codes

Author

Schuh, M, Tückmantel, J, Biarrotte, JL, and Kaltchev, D

Subjects
Accelerators and Storage Rings
Abstract

In order to compare simulation results performed with different codes a simulation test bench is defined and four different codes are compared with each other to validate their compatibility.

Published
2010

48. Higher Order Modes in the Superconducting Cavities of the SPL

Author

Gerigk, F, Schuh, M, Tückmantel, Joachim, and Welsch, C P

Subjects
Physics::Accelerator Physics, Accelerators and Storage Rings
Abstract

In this paper is analysed the influence of Higher Order Modes (HOM) on the operation of the superconducting linac section of the SPL, the Superconducting Proton Linac being designed at CERN. For this purpose, the characteristics of the HOMs in the 2 different beta families (0.65, 0.92 both at 704 MHz) of the SPL are calculated to estimate their effect on the cryogenic system and on the beam stability. For both criteria the maximum external Q of the HOMs is defined.

Published
2009

49. Choice of the optimum beta for the SPL cavities

Author

Gerigk, F, Eshraqi, M, and Schuh, M

Subjects
Nonlinear Sciences::Adaptation and Self-Organizing Systems, Condensed Matter::Superconductivity, Physics::Optics, Physics::Accelerator Physics, Computer Science::Software Engineering, Accelerators and Storage Rings
Abstract

This note explains the reasoning behind the choice of the geometric betas for the superconducting cavities of the SPL.

Published
2009

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