Accession Number:

AD0743057

Title:

Ultraviolet Output from Pulsed Short Arcs.

Descriptive Note:

Final rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Trenholme,John B.
• Emmett,John L.

Report Date:

1972-04-01

Pagination or Media Count:

32.0

Abstract:

A pulsed ultraviolet source consisting of microsecond, kiloampere discharges across a millimeter gap in the noble gases was investigated. The optical output was monitored in the 1800 - 3000 A region. It was found that maximum time-integrated output was achieved with xenon, but that duration as well as amplitude increased in the He-Xe sequence. The output saturated with pressure at about 5 atm in all the gases. A 200 nsec current pulse was almost three times as efficient as a 700 nsec pulse, because the UV output is associated with high current density in a narrow initial arc channel, and the longer pulse allows more time for radial expansion. The UV reduction and amplitude jitter reduction due to a dc keep-alive current were also investigated. Author

Descriptors:

• *GAS DISCHARGES
• *ULTRAVIOLET RADIATION
• *XENON LAMPS
• RARE GASES
• BRIGHTNESS
• ELECTRODES
• CAPACITORS

Subject Categories:

• Air Conditioning, Heating, Lighting and Ventilating

Distribution Statement:

APPROVED FOR PUBLIC RELEASE