Seeded SASE free-electron lasers as fully coherent VUV and x-ray sources

Josef Feldhaus; Jacek Krzywinski; Evgeny L. Saldin; Jochen R. Schneider; Evgeny A. Schneidmiller; Mikhail V. Yurkov

doi:10.1117/12.331840

1 December 1998 Seeded SASE free-electron lasers as fully coherent VUV and x-ray sources

Josef Feldhaus, Jacek Krzywinski, Evgeny L. Saldin, Jochen R. Schneider, Evgeny A. Schneidmiller, Mikhail V. Yurkov

Proceedings Volume 3451, Time Structure of X-Ray Sources and Its Applications; (1998) https://doi.org/10.1117/12.331840
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

Single-pass free electron lasers (FEL) based on the self- amplification of spontaneous emission (SASE) do not require optical resonators and may therefore be used in the vacuum ultraviolet (VUV) and X-ray region down to wavelengths around 0.1 nm. Due to the start-up from noise, however, there is only little longitudinal coherence, and the photon pulses consist of many uncorrelated narrow lines. In this paper we present the conceptual design of two different optical schemes for the VUV SASE-FEL at DESY, aiming at the production of fully coherent, tunable VUV and soft X-ray radiation with good pulse-to-pulse stability. At long wavelengths it is planned to install a narrow-band optical feedback using a blazed grating in Littrow mounting. This scheme is based on the high repetition rate of the accelerator and combines the light pulse coming from the first electron bunch with the fifth electron bunch which amplifies it to saturation. At shorter wavelengths it is proposed to divide the undulator into two parts and put a high-resolution grazing-incidence monochromator in between. This scheme works for any pulse timing because the seeding pulse is combined with the same electron bunch at the entrance of the second undulator driving it to saturation.

Citation Download Citation

Josef Feldhaus, Jacek Krzywinski, Evgeny L. Saldin, Jochen R. Schneider, Evgeny A. Schneidmiller, and Mikhail V. Yurkov "Seeded SASE free-electron lasers as fully coherent VUV and x-ray sources", Proc. SPIE 3451, Time Structure of X-Ray Sources and Its Applications, (1 December 1998); https://doi.org/10.1117/12.331840

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available