Absolute brightness of laser plasmas in the soft-x-ray emission band

F. Bijkerk; E. Louis; G. E. van Dorssen; A. P. Shevelko; A. A. Vasilyev

doi:10.1364/AO.33.000082

Applied Optics
Vol. 33,
Issue 1,
pp. 82-88
(1994)
•https://doi.org/10.1364/AO.33.000082

Absolute brightness of laser plasmas in the soft-x-ray emission band

F. Bijkerk, E. Louis, G. E. van Dorssen, A. P. Shevelko, and A. A. Vasilyev

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F. Bijkerk, E. Louis, G. E. van Dorssen, A. P. Shevelko, and A. A. Vasilyev, "Absolute brightness of laser plasmas in the soft-x-ray emission band," Appl. Opt. 33, 82-88 (1994)

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Abstract

A new method for the determination of the absolute brightness of pointlike soft-x-ray sources is proposed, and an example of its application is shown at a laser-plasma source for a wavelength band from 0.8 to ~ 1.7 nm.

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Target	Ion	Transition	Wavelength (nm)	Diode Filter	B _exp(λ) (10⁻⁷ sr)	B _th (λ) (10⁻⁷ sr)
Mg	[H]-like Mg	1s–2p	0.8421	Alb	2.02 ± 0.40	2.95
	Mg xii
	[He]-like Mg	1s ²–1s2p	0.9168
	Mgxi
(CF₂) _n	[H]-like F	1s–2p	1.4984	Cu/Alc	0.96 ± 0.20	1.25
	F ix
	[He]-like F	1s ²–1s3p	1.4458
	F viii	1s ²–1s4p	1.3780

Target	Investigated Ion	Transition	Wavelength (nm)	$L (\frac{photons}{μ m^{2} sr}) (\times 10^{7})$	$W (\frac{photons}{μ m^{2} sr s nm}) (\times 10^{18})$	T _B (eV)
Mg	[H]-like Mg	1s–2p	0.8421	2.0	3.0	105
	[He]-like Mg	1s ²–1s2p	0.9168	2.7	4.0	110
(CF₂) _n	[H]-like F	1s–2p	1.4984	6.4	5.6	85

Target	Laser Energy E _L (J)	Wavelength Band (nm)	Conversion Efficiency (%)
Fe	1.48	0.9–1.7	5.6
Ni	1.60	0.9–1.45	5.0
Cu	2.34	0.8–1.3	4.7

Target	Ion	Transition	Wavelength (nm)	Diode Filter	B _exp(λ) (10⁻⁷ sr)	B _th (λ) (10⁻⁷ sr)
Mg	[H]-like Mg	1s–2p	0.8421	Alb	2.02 ± 0.40	2.95
	Mg xii
	[He]-like Mg	1s ²–1s2p	0.9168
	Mgxi
(CF₂) _n	[H]-like F	1s–2p	1.4984	Cu/Alc	0.96 ± 0.20	1.25
	F ix
	[He]-like F	1s ²–1s3p	1.4458
	F viii	1s ²–1s4p	1.3780

Target	Investigated Ion	Transition	Wavelength (nm)	$L (\frac{photons}{μ m^{2} sr}) (\times 10^{7})$	$W (\frac{photons}{μ m^{2} sr s nm}) (\times 10^{18})$	T _B (eV)
Mg	[H]-like Mg	1s–2p	0.8421	2.0	3.0	105
	[He]-like Mg	1s ²–1s2p	0.9168	2.7	4.0	110
(CF₂) _n	[H]-like F	1s–2p	1.4984	6.4	5.6	85

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Equations (9)

Applied Optics