Reviews of topical problems

Angular divergence and spatial coherence of X-ray laser radiation

 a,  a,  b
a All-Russian Scientific Research Institute of Experimental Physics — Federal Nuclear Centre, prosp. Mira 37, Sarov, Nizhny Novgorod region, 607190, Russian Federation
b State Scientific Center of the Russian Federation ‘Troitsk Institute for Innovation and Fusion Research’, Troitsk, Moscow Region, Russian Federation

X-ray lasers have been the subject of intense research since the mid-1980s owing to continuous advances in technology and computer engineering. By the mid-1990s, extreme ultraviolet (XUV) and soft X-ray lasing has already been achieved for approximately a hundred lines, with a lower boundary within the ’water window.’ At present, the generation of highly directional and highly coherent laser radiation is of great interest for a variety of scientific, technological and medical applications. The formation of X-ray laser radiation is only one aspect of the general field of X-ray lasing, where a number of interrelated atomic physics, plasma physics, and quantum electronics problems are also to be solved. In the present paper, the historical development and current state of theoretical and experimental work on the angular divergence and spatial coherence of X-ray laser radiation is reviewed. Various approaches to the dynamics of laser-amplified radiation are considered and prospects for improving laser beam quality and increasing radiation intensity discussed. A comparison is made between the experimental results and theoretical predictions.

Fulltext is available at IOP
PACS: 42.25.Kb, 42.55.Vc (all)
DOI: 10.1070/PU1998v041n08ABEH000428
Citation: Gasparyan P D, Starikov F A, Starostin A N "Angular divergence and spatial coherence of X-ray laser radiation" Phys. Usp. 41 761–792 (1998)
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Оригинал: Гаспарян П Д, Стариков Ф А, Старостин А Н «Проблема угловой расходимости и пространственной когерентности излучения рентгеновского лазера» УФН 168 843–876 (1998); DOI: 10.3367/UFNr.0168.199808b.0843

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