Zobrazeno 1 - 10
of 243
pro vyhledávání: '"F. Grüner"'
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-7 (2022)
Abstract Readily available bright X-ray beams with narrow bandwidth and tunable energy promise to unlock novel developments in a wide range of applications. Among emerging alternatives to large-scale and costly present-day radiation sources which sev
Externí odkaz:
https://doaj.org/article/608767bbf0ed4271b6b1a7a4e7b94b57
Autor:
F. Holy, A. R. Maier, B. Zeitler, R. Weingartner, S. Raith, N. Kajumba, M. El Ghazaly, W. Lauth, D. Krambrich, A. Gaupp, M. Scheer, J. Bahrdt, F. Grüner
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 17, Iss 5, p 050704 (2014)
Further development of synchrotron light sources and new concepts for free electron lasers require undulators with short periods and high magnetic fields. A promising approach is the cryogenic permanent magnet undulator concept based on an advanced m
Externí odkaz:
https://doaj.org/article/42c334bf8d324053ac18670d512d180b
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 16, Iss 7, p 070703 (2013)
X-ray free-electron lasers (FELs) require a very high electron beam quality in terms of emittance and energy spread. Since 2004 high quality electrons produced by laser-wakefield accelerators have been demonstrated, but the electron quality up to now
Externí odkaz:
https://doaj.org/article/0849f01f532c48258e74cb4068f2fc30
Autor:
R. Weingartner, S. Raith, A. Popp, S. Chou, J. Wenz, K. Khrennikov, M. Heigoldt, A. R. Maier, N. Kajumba, M. Fuchs, B. Zeitler, F. Krausz, S. Karsch, F. Grüner
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 15, Iss 11, p 111302 (2012)
Using quadrupole scan measurements we show laser-wakefield accelerated electrons to have a normalized transverse emittance of 0.21_{-0.02}^{+0.01}π mm mrad at 245 MeV. We demonstrate a multishot and a single-shot method, the mean emittance values fo
Externí odkaz:
https://doaj.org/article/c2d6f1685fcd4362bc521b895fcedb46
Publikováno v:
Physical Review X, Vol 2, Iss 3, p 031019 (2012)
Laser-plasma accelerators are prominent candidates for driving next-generation compact light sources, promising high-brightness, few-femtosecond x-ray pulses intrinsically synchronized to an optical laser, and thus are ideally suited for pump-probe e
Externí odkaz:
https://doaj.org/article/e39a98dfe70b4a9893199d65777ad644
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 14, Iss 5, p 050705 (2011)
Laser wakefield accelerators have shown 1 GeV electron beams with some 10 pC charge from centimeter-length gas capillaries. The electrons are accelerated by the field of a plasma wave trailing an intense laser pulse. For improving the stability, elec
Externí odkaz:
https://doaj.org/article/8199b65db22843df9da2fbf3ca524b79
Autor:
R. Weingartner, M. Fuchs, A. Popp, S. Raith, S. Becker, S. Chou, M. Heigoldt, K. Khrennikov, J. Wenz, T. Seggebrock, B. Zeitler, Zs. Major, J. Osterhoff, F. Krausz, S. Karsch, F. Grüner
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 14, Iss 5, p 052801 (2011)
The improvement of the energy spread, beam divergence, and pointing fluctuations are some of the main challenges currently facing the field of laser-wakefield acceleration of electrons. We address these issues by manipulating the electron beams after
Externí odkaz:
https://doaj.org/article/5ae8407f743d4dc4b3effa527b474f69
Autor:
F. H. O’Shea, G. Marcus, J. B. Rosenzweig, M. Scheer, J. Bahrdt, R. Weingartner, A. Gaupp, F. Grüner
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 13, Iss 7, p 070702 (2010)
Short period, high field undulators can enable short wavelength free electron lasers (FELs) at low beam energy, with decreased gain length, thus allowing much more compact and less costly FEL systems. We describe an ongoing initiative to develop such
Externí odkaz:
https://doaj.org/article/918c20422be94b5c80a3169a9a01113f
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 12, Iss 10, p 101301 (2009)
Laser-plasma accelerators are expected to deliver electron bunches with high space charge fields. Several recent publications have addressed the impact of space charge effects on such bunches after the extraction into vacuum. Artifacts due to the app
Externí odkaz:
https://doaj.org/article/935628940fef44f197f88df00fbfb437
Autor:
S. Becker, M. Bussmann, S. Raith, M. Fuchs, R. Weingartner, P. Kunz, W. Lauth, U. Schramm, M. El Ghazaly, F. Grüner, H. Backe, D. Habs
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 12, Iss 10, p 102801 (2009)
The application of quadrupole devices with high field gradients and small apertures requires precise control over higher order multipole field components. We present a new scheme for performance control and tuning, which allows the illumination of mo
Externí odkaz:
https://doaj.org/article/003c04a22a9b4c8c9c185892cfc0ff8f