Ultrafast coherent and incoherent X-ray generation by inner-shell atomic processes induced by < 25 fs, > 1 J pulses of high power CPA lasers
SCIE
SCOPUS
- Title
- Ultrafast coherent and incoherent X-ray generation by inner-shell atomic processes induced by < 25 fs, > 1 J pulses of high power CPA lasers
- Authors
- Toth, C; Kim, D; Walker, BC; Guo, T; Son, SH; Siders, CW; Cavalleri, A; Barty, CPJ
- Date Issued
- 2000-03
- Publisher
- INTERPERIODICA
- Abstract
- A new class of keV X-ray lasers based on specific inner-shell atomic transitions is analyzed. It is shown that population inversion between inner-shell vacancy levels of medium-Z elements can be created using only electron collisional ionization, or by using fast, incoherent X-ray pumping if the decay of the lower states is mediated by Coster-Kronig or super-Coster-Kronig processes. The requirements of extremely fast energy deposition on a target in order to compete with the inherently fast (0.1-20 fs) atomic processes can be fulfilled by use of an ultrahigh peak power laser system with ultrashort pulse duration. A state-of-the-art chirped pulse amplification (CPA) laser system delivering more than 1 J of optical energy in less than 25 fs with 10 Hz repetition rate is described. The laser system has also been used to produce high-brightness, narrow-linewidth incoherent X-rays that are optimal for time dependent X-ray diffraction studies. The design of sandwiched multilayer target structure and possible experimental configurations for effective production of coherent X-ray radiation are suggested. Preliminary experimental results of ultrafast (similar to 25 fs), high intensity (>10(19) W/cm(2)) excitation of layered metal targets show anomalous enhancement of specific Ti lines in the 2-14 nm wavelength range.
- Keywords
- TI-SAPPHIRE LASER; 10-HZ REPETITION RATE; OPTICAL PULSES; ULTRASHORT-PULSE; DIFFRACTION; AMPLIFICATION; SYSTEM; PHASE; MULTITERAWATT; TRANSITIONS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/20048
- ISSN
- 1054-660X
- Article Type
- Article
- Citation
- LASER PHYSICS, vol. 10, no. 2, page. 513 - 520, 2000-03
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.