Two Light Sources for Use in the Extreme Ultraviolet

R. G. Newburgh; L. Heroux; H. E. Hinteregger

doi:10.1364/AO.1.000733

Applied Optics
Vol. 1,
Issue 6,
pp. 733-737
(1962)
•https://doi.org/10.1364/AO.1.000733

Two Light Sources for Use in the Extreme Ultraviolet

R. G. Newburgh, L. Heroux, and H. E. Hinteregger

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R. G. Newburgh, L. Heroux, and H. E. Hinteregger, "Two Light Sources for Use in the Extreme Ultraviolet," Appl. Opt. 1, 733-737 (1962)

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Abstract

Two light sources, one a capillary discharge tube and the other a hollow cathode discharge tube, for use in the extreme ultraviolet are described. Both tubes are rugged, easily demountable, and electrically quiet so that counting techniques can be used. Results are given for resonance lines of H, A, Ne, and He; the He₂ molecular continuum; and lines of singly ionized A, Ne, and He. The wavelength region examined lies between 1216 and 256 Å.

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Wavelength (Å)	Gas	Photocathode current (A)	Yield (electrons/quantum)	No. photons/sec behind exit slit
584	He	3 × 10⁻¹²	14 × 10⁻²	1.3 × 10⁸
736	Ne	3 × 10⁻¹²	15 × 10⁻²	1.2 × 10⁸
1026	H	1.5 × 10⁻¹²	7 × 10⁻²	1.3 × 10⁸
1048	A	5 × 10⁻¹²	7 × 10⁻²	4.5 × 10⁸
1216	H	4.5 × 10⁻¹²	3 × 10⁻²	9.4 × 10⁸

Wave length (Å)	Gas	Discharge current (mA)	Photocathode current (A)	Yield (electrons/quantum)	No. photons/sec behind exit slit
256	He II	300	4 × 10⁻¹⁴	8 × 10⁻²	3.1 × 10⁶
304	He II	300	6 × 10⁻¹³	10 × 10⁻²	3.7 × 10⁷
460	Ne II	160	4 × 10⁻¹³	11 × 10⁻²	2.3 × 10⁷
584	He I	300	5 × 10⁻¹³	14 × 10⁻²	2.2 × 10⁷
744	Ne I	160	10 × 10⁻¹³	15 × 10⁻²	4.2 × 10⁷
920	A II	300	10 × 10⁻¹³	10 × 10⁻²	6.2 × 10⁷
1048	A I	300	4 × 10⁻¹³	7 × 10⁻²	3.6 × 10⁷

Wavelength (Å)	Gas	Photocathode current (A)	Yield (electrons/quantum)	No. photons/sec behind exit slit
584	He	3 × 10⁻¹²	14 × 10⁻²	1.3 × 10⁸
736	Ne	3 × 10⁻¹²	15 × 10⁻²	1.2 × 10⁸
1026	H	1.5 × 10⁻¹²	7 × 10⁻²	1.3 × 10⁸
1048	A	5 × 10⁻¹²	7 × 10⁻²	4.5 × 10⁸
1216	H	4.5 × 10⁻¹²	3 × 10⁻²	9.4 × 10⁸

Wave length (Å)	Gas	Discharge current (mA)	Photocathode current (A)	Yield (electrons/quantum)	No. photons/sec behind exit slit
256	He II	300	4 × 10⁻¹⁴	8 × 10⁻²	3.1 × 10⁶
304	He II	300	6 × 10⁻¹³	10 × 10⁻²	3.7 × 10⁷
460	Ne II	160	4 × 10⁻¹³	11 × 10⁻²	2.3 × 10⁷
584	He I	300	5 × 10⁻¹³	14 × 10⁻²	2.2 × 10⁷
744	Ne I	160	10 × 10⁻¹³	15 × 10⁻²	4.2 × 10⁷
920	A II	300	10 × 10⁻¹³	10 × 10⁻²	6.2 × 10⁷
1048	A I	300	4 × 10⁻¹³	7 × 10⁻²	3.6 × 10⁷

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Applied Optics