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25 November 1999 Optical design of a grazing incidence spectrometer/monochromater with varied line-space flat grating for high-order harmonic diagnostic
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Abstract
The optical design of an EUV spectrometer/monochromator for diagnostic of high-order harmonics generated by an ultra-short (less than 30 fs) pulsed laser focused onto a gas jet is presented. A grazing-incidence flat-field spectrometer for the 3 - 75 nm spectral region has been designed: it adopts a stigmatic toroidal mirror and a varied line-space flat grating mounted in converging light. The almost flat stigmatic spectrum is acquired by a 40 mm diameter MCP intensifier; the whole detector can be moved by means of an x-y linear drive and a rotator to scan various portions of the spectrum. The resolution is limited by the pixel size of the detector. Different gratings can be accommodated to work in medium- resolution or high-resolution mode. The same optical scheme can be applied to the design of a constant deviation angle EUV monochromator by substituting the detector block with an exit slit: the rotation of the grating gives the spectral scan. By using the grating at two different subtended angles a medium- resolution monochromator for the 3 - 50 nm spectral region is realized.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Luca Poletto, Giampiero Naletto, and Giuseppe Tondello "Optical design of a grazing incidence spectrometer/monochromater with varied line-space flat grating for high-order harmonic diagnostic", Proc. SPIE 3764, Ultraviolet and X-Ray Detection, Spectroscopy, and Polarimetry III, (25 November 1999); https://doi.org/10.1117/12.371102
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