Principal types of Soviet photomultipliers used in spectroscopy and their specifications*

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APPENDIX IV

Principal types of Soviet photomultipliers used in spectroscopy and their specifications*

Type of PM Spectral sensitivity

region, A

Maximum sensitivity region, A

Minimum integral sensitivity,

μ A/mm

Highest supply voltage, V

Maximum dark current, μ A

Photocathode dimensions,

mm

Notes

FEU-17A 3200-6000 4000 ±200 20 900 1400

0.003

0 . 3 1 6 x 5 FEU-18A 2200-6000 4000 ±200 20 900

1400

0.003 0 . 3

1 6 x 5

FEU-19M 3000-6000 4000 ±200 10 1100 1400 1900 2600

0.006 0.06 0 . 6 12

34

FEU-20 3700-6000 4000 ±200 20 900 0.008 1 0 x 5 For portable, pencil-beam equipment FEU-22 3700-10,000 7500 ±1000

-

¹⁴⁰⁰ ^{0 . 2} ^{1 6 x 5}

FEU-24 3200-8000 4000 ±200 25 1600

2000 0 . 3 75

FEU-27 3000-8000 5000 ±200 30 1100 1500 2000

0.005 25

FEU-29 3000-6000 4000 ±200 30 1400 1800 2300

0.03 34

FEU-31 3000-6000 4000 ±200 20 850

1300 0 . 5

18 For portable equipment

FEU-33 3000-6000 4000 ±200 30 2100

2900 1

20

34 For studying processes separated by brief intervals

For more detailed information on photomultiplier tubes and their characteristics, see [ 5 0 2 ] .

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Ι Ο NO

I. Spectrum of Argon. Positive column of high-frequency discharge in argon (a); discharge in a hollow iron cathode, (b). Spectrograph ISP-51 (see Appendix III).

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II. Spectrum of Nitrogen. Positive column of high-frequency discharge in air; 1-mm capillary, a) Spectro- graph ISP-51; b) Spectrograph ISP-28 (see Appendix III).

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Spectrum of Helium. High-frequency discharge in helium, a) Spectrograph ISP-51; b) Spectrograph ISP-28 (see Appendix III).

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282

IV. Spectrum of Neon. Positive column of high-frequency discharge in neon; 1-mm capillary, a) Spectro- graph ISP-51; b) Spectrograph ISP-28 (see Appendix III). The spectrogram shows traces of nitrogen bands.

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283

V. Spectrum of Krypton. High-frequency discharge; 1-mm capillary. (The central portion of the plate corresponds to the positive column of the discharge; the edges, to the glow in the vicinity of the external

electrodes.) Spectrograph ISP-51 (see Appendix III).

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284

VI. Spectrum of Xenon. Discharge in a hollow iron cathode. Spectrograph ISP-51 (see Appendix III).

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VII. Spectrum of Xenon. High-frequency discharge; 1-mm capillary. (The upper portion of the plate corresponds to excitation in the positive column of the discharge; the lower portion corresponds to excita-

tion in the vicinity of the electrodes.) Spectrograph ISP-51 (see Appendix III).

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J O 00 ON

VIII. Spectrum of C 0⁺. Hollow-cathode discharge in neon containing C O 2 . Spectrograph ISP-51 (see Appendix III).

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Κ) CO

^4

IX. Spectrum of NO. High-frequency discharge in air. Spectrograph ISP-28 (see Appendix III).

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Spectra of Helium-Nitrogen mixtures. Positive column of a high-frequency discharge. Pressure about 600 mm, capillary diameter 7 mm. a) N2 content 6 χ 10-4%; t>) N2 content 1 χ 10-2%.

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XI. Spectrum of Neon-Nitrogen mixture. Positive column of a high-frequency discharge. Capillary diameter 7 mm. Spectrograph ISP-28 (see Appendix III).

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Κ) ο ο

XII. Spectra of Helium-Hydrocarbon mixtures. Positive column of a high-frequency discharge. Capillary diameter 1 mm. Spectrograph ISP-28 (see Appendix III).