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Achieving microfocus of the 13.5-NM flash beam for exploring matter under extreme conditions

Abstract:

We have focused a beam (BL3) of FLASH (Free-electron LASer in Hamburg: δ=13.5 nm, pulse length 15 fs, pulse energy 10-40 μJ, 5Hz) using a fine polished off-axis parabola having a focal length of 270 mm and coated with a Mo/Si multilayer with an initial reflectivity of 67% at 13.5 nm. The OAP was mounted and aligned with a picomotor controlled six-axis gimbal. Beam imprints on poly(methyl methacrylate) - PMMA were used to measure focus and the focused beam was used to create isochoric heating ...

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Journal:
FEL 2009 - 31st International Free Electron Laser Conference
Pages:
784-788
Publication date:
2009-01-01
URN:
uuid:1d8ac0c8-c2aa-4e3b-a864-733bfccb8aea
Source identifiers:
432364
Local pid:
pubs:432364
Language:
English

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