Photo-Multiplier Tube


This photomultiplier tube was used with photoelectric photometers at the Lick Observatory. It is a Lallemand standard 12-stage red-infrared sensitive unit with an electronic lens (a Lallemand invention) for restricting the size of the effective photocathode thereby much reducing the background current from the red sensitive cathodes. In publications, it was designated “Lal III.” André Lallemand (1904-1978) was a French astronomer, and director of the Institut d’Astrophysique de Paris.

Location: Currently not on view

See more items in: Medicine and Science: Physical Sciences


Exhibition Location:

Credit Line: Gerald Kron

Data Source: National Museum of American History

Id Number: 1997.0340.04Catalog Number: 1997.0340.04Accession Number: 1997.0340

Object Name: Tube, Photo-Multiplier, Lallemand

Measurements: overall: 4 cm x 4.8 cm x 20 cm; 1 9/16 in x 1 7/8 in x 7 7/8 inoverall: 7 5/8 in x 1 1/2 in; 19.3675 cm x 3.81 cm


Record Id: nmah_1184552

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