EFFECT OF PHOTOCATHODE-TO-FIRST DYNODE VOLTAGE ON PHOTOMULTIPLIER NOISE PULSES

Journal Article · Tue Mar 31 23:00:00 EST 1964 · Rev. Sci. Instr.

DOI:https://doi.org/10.1063/1.1718864· OSTI ID:4031675

Walton, P W

The experiments of Pagano, in which the noise count at a high discriminator setting was found to reach a minimum at a V/sub C//V/sub D/ ratio of approximate unity, were repeated. Two low-noise photomultipliers (EMI 9514A, a venetian blind type, and EMI 9524S, of box and grid structure) were studied under conditions where all single electron noise was counted. The results do not show a minimum in the noise vs V/sub C//V/sub D/ graph, but instead a steadily rising curve tending toward a plateau. For the 9514A tube, the curve can be explained by a combination of the Schottky effect and an increase of the number of electrons produced at the first dynode as V/sub C/ is increased. (D.L.C.)

• Research Organization: Univ. of Dublin
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-018163
• OSTI ID: 4031675
• Journal Information: Rev. Sci. Instr., Journal Name: Rev. Sci. Instr. Vol. Vol: 35
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CATHODES
DIAGRAMS
EFFICIENCY
ELECTRIC CHARGES
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELECTRODES
ELECTRONS
INSTRUMENTATION
MEASURED VALUES
NOISE
PHOTOMULTIPLIERS
QUANTITY RATIO
SCHOTTKY EFFECT
SIGNALS
THERMIONICS