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Wolfram Helml

SLAC National Accelerator Laboratory

20H-index
67Paper Count
1.7KCitation Count
Published Papers 19
Publication Date
Opportunities for gas-phase science at short-wavelength free-electron lasers with undulator-based polarization control
err2025-01-27
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errIlchen, Markus; Allaria, Enrico; Ribic, Primoz Rebernik; Nuhn, Heinz-Dieter; Lutman, Alberto; Schneidmiller, Evgeny; Tischer, Markus; Yurkov, Mikail; Calvi, Marco; Prat, Eduard; Reiche, Sven; Schmidt, Thomas; Geloni, Gianluca Aldo; Karabekyan, Suren; Yan, Jiawei; Serkez, Svitozar; Gao, Zhangfeng; Deng, Bangjie; Feng, Chao; Deng, Haixiao; Helml, Wolfram; Funke, Lars; Larsson, Mats; Zhaunerchyk, Vitali; Meyer, Michael; Mazza, Tommaso; Jahnke, Till; Doerner, Reinhard; Calegari, Francesca; Smirnova, Olga; Vozzi, Caterina; De Ninno, Giovanni; Waetzel, Jonas; Berakdar, Jamal; Bari, Sadia; Schwob, Lucas; Rouxel, Jeremy R.; Mukamel, Shaul; Bartschat, Klaus; Hamilton, Kathryn; Argenti, Luca; Douguet, Nicolas; Novikovskiy, Nikolay M.; V. Demekhin, Philipp; Walter, Peter
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Steady-state solutions of split beams in electron storage rings
err2022-11-01
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errOAAI
errJebramcik, Marc Andre; Khan, Shaukat; Helml, Wolfram
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Artificial intelligence for online characterization of ultrashort X-ray free-electron laser pulses
err2022-10-24
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errDingel, Kristina; Otto, Thorsten; Marder, Lutz; Funke, Lars; Held, Arne; Savio, Sara; Hans, Andreas; Hartmann, Gregor; Meier, David; Viefhaus, Jens; Sick, Bernhard; Ehresmann, Arno; Ilchen, Markus; Helml, Wolfram
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Site-specific interrogation of an ionic chiral fragment during photolysis using an X-ray free-electron laser
err2021-08-12
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errIlchen, Markus; Schmidt, Philipp; Novikovskiy, Nikolay M.; Hartmann, Gregor; Rupprecht, Patrick; Coffee, Ryan N.; Ehresmann, Arno; Galler, Andreas; Hartmann, Nick; Helml, Wolfram; Huang, Zhirong; Inhester, Ludger; Lutman, Alberto A.; MacArthur, James P.; Maxwell, Timothy; Meyer, Michael; Music, Valerija; Nuhn, Heinz-Dieter; Osipov, Timur; Ray, Dipanwita; Wolf, Thomas J. A.; Bari, Sadia; Walter, Peter; Li, Zheng; Moeller, Stefan; Knie, Andre; Demekhin, Philipp V.
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A self-referenced in-situ arrival time monitor for X-ray free-electron lasers
err2021-02-11
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errOAAI
errDiez, Michael; Galler, Andreas; Schulz, Sebastian; Boemer, Christina; Coffee, Ryan N.; Hartmann, Nick; Heider, Rupert; Wagner, Martin S.; Helml, Wolfram; Katayama, Tetsuo; Sato, Tokushi; Sato, Takahiro; Yabashi, Makina; Bressler, Christian
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Clocking Auger electrons
err2021-01-18
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PREAI
errHaynes, D. C.; Wurzer, M.; Schletter, A.; Al-Haddad, A.; Blaga, C.; Bostedt, C.; Bozek, J.; Bromberger, H.; Bucher, M.; Camper, A.; Carron, S.; Coffee, R.; Costello, J. T.; DiMauro, L. F.; Ding, Y.; Ferguson, K.; Grguras, I.; Helml, W.; Hoffmann, M. C.; Ilchen, M.; Jalas, S.; Kabachnik, N. M.; Kazansky, A. K.; Kienberger, R.; Maier, A. R.; Maxwell, T.; Mazza, T.; Meyer, M.; Park, H.; Robinson, J.; Roedig, C.; Schlarb, H.; Singla, R.; Tellkamp, F.; Walker, P. A.; Zhang, K.; Doumy, G.; Behrens, C.; Cavalieri, A. L.
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Laser-induced inner-shell excitations through direct electron re-collision versus indirect collision
err2020-07-21
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errDeng, Yunpei; Zeng, Zhinan; Komm, Pavel; Zheng, Yinghui; Helml, Wolfram; Xie, Xinhua; Filus, Zoltan; Dumergue, Mathieu; Flender, Roland; Kurucz, Mate; Haizer, Ludovit; Kiss, Balint; Kahaly, Subhendu; Li, Ruxin; Marcus, Gilad
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Tunable isolated attosecond X-ray pulses with gigawatt peak power from a free-electron laser
err2019-12-02
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errDuris, Joseph; Li, Siqi; Driver, Taran; Champenois, Elio G.; MacArthur, James P.; Lutman, Alberto A.; Zhang, Zhen; Rosenberger, Philipp; Aldrich, Jeff W.; Coffee, Ryan; Coslovich, Giacomo; Decker, Franz-Josef; Glownia, James M.; Hartmann, Gregor; Helml, Wolfram; Kamalov, Andrei; Knurr, Jonas; Krzywinski, Jacek; Lin, Ming-Fu; Nantel, Megan; Natan, Adi; O'Neal, Jordan; Shivaram, Niranjan; Walter, Peter; Wang, Anna Li; Welch, James J.; Wolf, Thomas J. A.; Xu, Joseph Z.; Kling, Matthias F.; Bucksbaum, Philip H.; Zholents, Alexander; Huang, Zhirong; Cryan, James P.; Marinelli, Agostino; Marangos, Jon P.
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Dual-energy electron beams from a compact laser-driven accelerator
err2019-02-18
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PREAI
errWenz, J.; Doepp, A.; Khrennikov, K.; Schindler, S.; Gilljohann, M. F.; Ding, H.; Gotzfried, J.; Buck, A.; Xu, J.; Heigoldt, M.; Helml, W.; Veisz, L.; Karsch, S.
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Propagation-enhanced generation of intense high-harmonic continua in the 100-eV spectral region
errOPTICA
IF8.5
err2018-10-12
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errRivas, D. E.; Major, B.; Weidman, M.; Helml, W.; Marcus, G.; Kienberger, R.; Charalambidis, D.; Tzallas, P.; Balogh, E.; Kovacs, K.; Tosa, V; Bergues, B.; Varju, K.; Veisz, L.
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Attosecond time-energy structure of X-ray free-electron laser pulses
err2018-03-05
err147
PREAI
errHartmann, N.; Hartmann, G.; Heider, R.; Wagner, M. S.; Ilchen, M.; BucK, J.; Lindahl, A. O.; Benko, C.; Gruenert, J.; Krzywinski, J.; Liu, J.; Lutman, A. A.; Marinelli, A.; Maxwell, T.; Miahnahri, A. A.; Moeller, S. P.; Planas, M.; Robinson, J.; Kazansky, A. K.; Kabachnik, N. M.; Viefhaus, J.; Feurer, T.; Kienberger, R.; Coffee, R. N.; Helml, W.
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Tabletop nonlinear optics in the 100-eV spectral region
errOPTICA
IF8.5
err2018-02-23
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errBergues, B.; Rivas, D. E.; Weidman, M.; Muschet, A. A.; Helml, W.; Guggenmos, A.; Pervak, V.; Kleineberg, U.; Marcus, G.; Kienberger, R.; Charalambidis, D.; Tzallas, P.; Schroeder, H.; Krausz, F.; Veisz, L.
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Accurate prediction of X-ray pulse properties from a free-electron laser using machine learning
err2017-06-05
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errSanchez-Gonzalez, A.; Micaelli, P.; Olivier, C.; Barillot, T. R.; Ilchen, M.; Lutman, A. A.; Marinelli, A.; Maxwell, T.; Achner, A.; Agaker, M.; Berrah, N.; Bostedt, C.; Bozek, J. D.; Buck, J.; Bucksbaum, P. H.; Montero, S. Carron; Cooper, B.; Cryan, J. P.; Dong, M.; Feifel, R.; Frasinski, L. J.; Fukuzawa, H.; Galler, A.; Hartmann, G.; Hartmann, N.; Helml, W.; Johnson, A. S.; Knie, A.; Lindahl, A. O.; Liu, J.; Motomura, K.; Mucke, M.; O'Grady, C.; Rubensson, J. -E.; Simpson, E. R.; Squibb, R. J.; Sathe, C.; Ueda, K.; Vacher, M.; Walke, D. J.; Zhaunerchyk, V.; Coffee, R. N.; Marangos, J. P.
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Generating femtosecond X-ray pulses using an emittance-spoiling foil in free-electron lasers
err2015-11-09
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errDing, Y.; Behrens, C.; Coffee, R.; Decker, F. -J.; Emma, P.; Field, C.; Helml, W.; Huang, Z.; Krejcik, P.; Krzywinski, J.; Loos, H.; Lutman, A.; Marinelli, A.; Maxwell, T. J.; Turner, J.
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Measuring the temporal structure of few-femtosecond free-electron laser X-ray pulses directly in the time domain
err2014-11-24
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errHelml, W.; Maier, A. R.; Schweinberger, W.; Grguras, I.; Radcliffe, P.; Doumy, G.; Roedig, C.; Gagnon, J.; Messerschmidt, M.; Schorb, S.; Bostedt, C.; Gruener, F.; DiMauro, L. F.; Cubaynes, D.; Bozek, J. D.; Tschentscher, Th.; Costello, J. T.; Meyer, M.; Coffee, R.; Duesterer, S.; Cavalieri, A. L.; Kienberger, R.
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Sub-femtosecond precision measurement of relative X-ray arrival time for free-electron lasers
err2014-07-27
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PREAI
errHartmann, N.; Helml, W.; Galler, A.; Bionta, M. R.; Gruenert, J.; Molodtsov, S. L.; Ferguson, K. R.; Schorb, S.; Swiggers, M. L.; Carron, S.; Bostedt, C.; Castagna, J. -C.; Bozek, J.; Glownia, J. M.; Kane, D. J.; Fry, A. R.; White, W. E.; Hauri, C. P.; Feurer, T.; Coffee, R. N.
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Single-shot carrier-envelope phase measurement of few-cycle laser pulses
err2009-04-19
err259
PREAI
errWittmann, T.; Horvath, B.; Helml, W.; Schaetzel, M. G.; Gu, X.; Cavalieri, A. L.; Paulus, G. G.; Kienberger, R.
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TIMI 3 flow after primary angioplasty is an important predictor for outcome in patients with acute myocardial infarction
err2008-10-30
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errKammler, Juergen; Kypta, Alexander; Hofmann, Robert; Kerschner, Klaus; Grund, Michael; Sihorsch, Kurt; Steinwender, Clemens; Lambert, Thomas; Helml, Wolfram; Leisch, Franz
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