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Title: Ionization tube simmer current circuit

A highly efficient flash lamp simmer current circuit utilizes a fifty percent duty cycle square wave pulse generator to pass a current over a current limiting inductor to a full wave rectifier. The DC output of the rectifier is then passed over a voltage smoothing capacitor through a reverse current blocking diode to a flash lamp tube to sustain ionization in the tube between discharges via a small simmer current. An alternate embodiment of the circuit combines the pulse generator and inductor in the form of an FET off line square wave generator with an impedance limited step up output transformer which is then applied to the full wave rectifier as before to yield a similar simmer current.
Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
OSTI Identifier:
869649
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
Patent Number(s):
US 5373215
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
ionization; tube; simmer; current; circuit; highly; efficient; flash; lamp; utilizes; fifty; percent; duty; cycle; square; wave; pulse; generator; pass; limiting; inductor; rectifier; dc; output; passed; voltage; smoothing; capacitor; reverse; blocking; diode; sustain; discharges; via; alternate; embodiment; combines; form; fet; line; impedance; limited; step; transformer; applied; yield; similar; dc output; current circuit; pulse generator; highly efficient; duty cycle; alternate embodiment; wave generator; flash lamp; current limiting; square wave; wave rectifier; output transformer; simmer current; fifty percent; wave pulse; blocking diode; current limit; /315/