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Proceedings Paper

Optical design of a grazing incidence spectrometer/monochromater with varied line-space flat grating for high-order harmonic diagnostic
Author(s): Luca Poletto; Giampiero Naletto; Giuseppe Tondello
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Paper 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.

Paper Details

Date Published: 25 November 1999
PDF: 9 pages
Proc. SPIE 3764, Ultraviolet and X-Ray Detection, Spectroscopy, and Polarimetry III, (25 November 1999); doi: 10.1117/12.371102
Show Author Affiliations
Luca Poletto, INFM (Italy) and Univ. degli Studi di Padova (Italy)
Giampiero Naletto, INFM (Italy) and Univ. degli Studi di Padova (Italy)
Giuseppe Tondello, INFM (Italy) and Univ. degli Studi di Padova (Italy)

Published in SPIE Proceedings Vol. 3764:
Ultraviolet and X-Ray Detection, Spectroscopy, and Polarimetry III
Silvano Fineschi; Bruce E. Woodgate; Randy A. Kimble, Editor(s)

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