Abstract

Direct measurement of the photoelectron collection efficiency in the EMI 9558 photomultiplier yields a value of 75 ± 10%. The authors of this paper believe the substantially lower values recently reported to be spurious and discuss their reasons for this.

© 1971 Optical Society of America

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References

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  1. R. Foord, R. Jones, C. J. Oliver, E. R. Pike, Appl. Opt. 8, 1975 (1969).
    [CrossRef] [PubMed]
  2. A. T. Young, Appl. Opt. 10, 1681 (1971).
    [CrossRef] [PubMed]
  3. A. T. Young, Appl. Opt. 8, 2431 (1969).
    [CrossRef] [PubMed]
  4. J. P. Keene, Rev. Sci. Instrum. 34, 1220 (1963).
    [CrossRef]
  5. E. H. Eberhardt, P. R. Henkel, Final Report on NASA contract NASW-1855, ITT EDT 70-006, 21May (1970).

1971

1969

1963

J. P. Keene, Rev. Sci. Instrum. 34, 1220 (1963).
[CrossRef]

Eberhardt, E. H.

E. H. Eberhardt, P. R. Henkel, Final Report on NASA contract NASW-1855, ITT EDT 70-006, 21May (1970).

Foord, R.

Henkel, P. R.

E. H. Eberhardt, P. R. Henkel, Final Report on NASA contract NASW-1855, ITT EDT 70-006, 21May (1970).

Jones, R.

Keene, J. P.

J. P. Keene, Rev. Sci. Instrum. 34, 1220 (1963).
[CrossRef]

Oliver, C. J.

Pike, E. R.

Young, A. T.

Appl. Opt.

Rev. Sci. Instrum.

J. P. Keene, Rev. Sci. Instrum. 34, 1220 (1963).
[CrossRef]

Other

E. H. Eberhardt, P. R. Henkel, Final Report on NASA contract NASW-1855, ITT EDT 70-006, 21May (1970).

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Figures (3)

Fig. 1
Fig. 1

Block diagram of the experiment.

Fig. 2
Fig. 2

Circuit used to measure cathode photocurrents. Operation as a photomultiplier is restored by disconnecting the wire from the 82-kΩ resistor to D1 and joining the cathode lead to the cathode connector. These operations are performed outside the thermal insulation in the removable socket assembly, so that the tube socket itself is not disturbed.

Fig. 3
Fig. 3

Integral pulse-height distributions measured after first data set. The relative height corresponds to the input attenuator setting on the Ortec 410 linear amplifier (see Fig. 1); an attenuation of 5 was used in the collection efficiency experiment. Dark and light-minus-dark distributions are shown.

Tables (2)

Tables Icon

Table I Dark Filter Transmission Measurementsa (Transmission in Units of 10−5)

Tables Icon

Table II Summary of Photoelectron-Collection Efficiency Dataa

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