Simmer Supplies for Precision Laser Applications

Did You Know?

Did you know that a simmer supply typically maintains only a few milliamps (often 1–20 mA) through a gas laser tube at several hundred volts to a few kilovolts, keeping the discharge just below lasing threshold but ready to fire within microseconds? Without a properly designed simmer stage, the main high-voltage pulse must repeatedly re-ionize the gas, increasing jitter, electrode erosion, and the risk of misfires at higher repetition rates. Engineers often underestimate that the simmer circuit’s dynamic impedance and isolation from the main discharge path are critical to prevent the simmer current from being quenched during the high-current pulse, which can destabilize both pulse energy and timing.
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Frequently Asked Questions

Simmer supplies are low-current, high-voltage power units designed to maintain a continuous pre-ionization (simmer) discharge in gas discharge tubes or flashlamps between high-energy pulses. By keeping the lamp in a low-level conductive state, they reduce the required ignition voltage, improve pulse-to-pulse stability, and extend lamp life by avoiding repeated hard starts.

What Are Simmer Supplies?

Simmer Supplies are specialized charger units used to maintain a low-level pre-ionization (simmer current) in pulsed gas lasers, excimer lasers, and similar high-voltage discharge systems. By sustaining a controlled simmer discharge between pulses, these units stabilize breakdown voltage, reduce jitter, and improve pulse-to-pulse energy consistency in high-voltage laser power trains.

Typically, Simmer Supplies operate as part of a broader power system that includes a main high-voltage charger and pulse-forming network. The simmer unit provides a continuous or quasi-continuous current path through the laser tube or discharge chamber at a significantly lower power level than the main discharge.

Typical Specifications and Parameters

When evaluating Simmer Supplies on FindLight, engineers generally compare:

  • Output voltage: Often in the 0.5–5 kV range, depending on laser tube type and gas fill.
  • Simmer current: From a few milliamps up to tens of milliamps, with adjustable setpoints.
  • Output power: Typically tens to hundreds of watts, sized to maintain stable pre-ionization without overheating the tube.
  • Topology and isolation: Flyback, forward, or resonant converters; input-output isolation and creepage/clearance suitable for your safety standards.
  • Control interface: Analog control pins, digital enable, status signals, or bus interfaces for system integration.
  • Protection features: Over-voltage, over-current, arc-detection, short-circuit protection, and fault latching behavior.
  • Cooling and form factor: Convection- or forced-air-cooled modules, rack units, or OEM boards with defined mounting patterns.

Use Cases for Simmer Supplies

Simmer Supplies are used in high-repetition-rate excimer lasers, pulsed gas lasers, UV lithography sources, laser annealing systems, and other plasma-based discharge devices. They are also relevant in test stands and research platforms that require reproducible ignition of high-voltage discharges.

Buyer Guidance on FindLight

On FindLight you can compare available Simmer Supplies by voltage range, simmer current capability, regulation accuracy, and interface options. Check datasheets for line/load regulation, ripple, dynamic response, and compliance with standards such as IEC/EN safety requirements.

For integration into existing laser power racks, review mechanical drawings and connector pinouts, as well as required external ballast or series resistors. If your application involves custom discharge characteristics, use FindLight to request quotes or technical clarification directly from suppliers—no registration is required to initiate contact. This enables you to quickly shortlist Simmer Supplies that match your electrical, thermal, and control constraints.