Zobrazeno 1 - 10
of 97
pro vyhledávání: '"G.J. Ernst"'
Publikováno v:
Nuclear instruments and methods in physics research. Section B : Beam interactions with materials and atoms, 1999(A 427), 68-73. Elsevier
The design of a compact system for the transport of a 6 MeV electron beam from a photo-cathode linac to a race-track-microtron is described. The high quality of the electron beam has to be maintained during transport. The geometrical limitations make
Publikováno v:
Nuclear instruments and methods in physics research. Section B : Beam interactions with materials and atoms, 139(1-4), 541-545. Elsevier
A high brightness electron beam with low energy spread is essential for a free electron laser intended to operate in the wavelength region beyond the UV. Several hundreds of amperes peak current, an emittance of several π mm mrad or less and an ener
Publikováno v:
Journal of Applied Physics, 82(3), 1384-1387. American Institute of Physics
K–Te photocathodes deposited on a Mo substrate have been successfully used as an electron source in the free electron laser of University of Twente. Long lifetimes have been measured: after more than 20 h of operation in the accelerator a K–Te ca
The effect of transverse modes in a wave-guide resonator on the resonance condition of a compton FEL
Publikováno v:
Optics communications, 133(1-6), 229-233. Elsevier
In a free electron laser where the resonator has a wave-guide structure the phase velocity of the light has a significant impact on the wavelength of the output radiation. This effect is well known in Raman-type FEL's. It is however less known that t
Autor:
Jim Jan Botman, A.F.M. Bouman, Jwj Verschuur, G.J. Ernst, HL Henk Hagedoorn, Rfxam Rainier Mols, J.L. Delhez, B.M. van Oerle, WJ Willem Witteman, Wjgm Wiel Kleeven
Publikováno v:
Infrared Physics and Technology, 36(1), 81-98. Elsevier
Infrared physics & technology, 36(1), 81-98. Elsevier
ISSUE=6;TITLE=6th International Conference on Infrared Physics, CIRP 1994
Infrared physics & technology, 36(1), 81-98. Elsevier
ISSUE=6;TITLE=6th International Conference on Infrared Physics, CIRP 1994
The free-electron laser of the TEU-FEL project will be based on a 6 MeV photo-cathode linac as injector, a 25 MeV race-track microtron as main accelerator and a hybrid, 25 mm period undulator. The project will be carried out in two phases. In phase o
Autor:
G.J. Ernst, Eltjo H. Haselhoff
Publikováno v:
Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment, 318(1-3), 295-300. Elsevier
In this paper we discuss the effects of the space charge fields of centripetally accelerated particles. It is shown that these effects may cause a discrepancy in terms of the calculated rms emittance as compared to calculations where space charge fie
Autor:
A.F.M. Bouman, HL Henk Hagedoorn, J.I.M. Botman, E.H. Haselhoff, W.J. Witteman, W.J.G.M. Kleeven, J.L. Delhez, G.J. Ernst, Jeroen W.J. Verschuur, R.F.X.A.M. Mols
Publikováno v:
Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment, 318(1-3), 173-177. Elsevier
The free-electron laser of the TEU-FEL project will be realized in two phases. In phase I the FEL will be driven by a 6 MeV photoelectric linac. In phase II the linac will be used as an injector for a 25 MeV race-track microtron. Information is prese
Publikováno v:
Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment, 296(1-3), 304-307. Elsevier
We present a description of the 10 /spl mu/m FEL oscillator that is currently being constructed. The FEL will contain a photocathode injector, delivering a maximum current of approximate 400 A, a racetrack microtron or a linear accelerator for accele
Publikováno v:
Applied physics letters, 70(12), 1491-1493. American Institute of Physics
Cs-K-Te films have been fabricated under ultrahigh vacuum by vapor deposition of Te, K, and Cs onto a Mo substrate into the preparation chamber of the free electron laser of the University of Twente. Their photoemission properties are reported in thi
Autor:
G.J. Ernst, R.F.X.A.M. Mols
Publikováno v:
Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment, 341(1-3), 481-483. Elsevier
A Nd:YLF laser system with frequency doubled output is described. Several aspects concerning energy and stability of the pulses will be discussed. The system consists of a CW mode locked Nd:YLF oscillator and two double pass amplifiers having a total