Ideal Spectroscopy TwinJet Dual Pulsed Discharge Jet Nozzle and Two PDD-100 Pulsed Discharge Driver Kit for LIF and Molecular Beam Spectroscopy

This Ideal Spectroscopy TwinJet Dual Pulsed Discharge Jet Kit combines the TwinJet Dual Pulsed Discharge Jet Nozzle with two PDD-100 Pulsed Discharge Drivers to provide an integrated solution for generating radicals, transient molecules, and reactive intermediates from two independently controlled precursor streams.

The TwinJet is an advanced two-precursor molecular beam source designed for experiments requiring reactive molecular species that may be difficult or impossible to generate using a conventional single-stream discharge nozzle. The system incorporates two independent high-speed pulsed valves, two separate precursor and buffer-gas channels, and two independently energized discharge sections that converge at a common mixing region near the throat of the supersonic expansion nozzle.

Each TwinJet channel can carry a different chemical precursor diluted in a high-pressure inert buffer gas such as argon or helium. The two precursor mixtures remain physically separated within their respective valves and discharge passages, helping prevent premature reactions while allowing unstable, incompatible, or highly reactive precursor combinations to be introduced as independent streams.

Two included PDD-100 Pulsed Discharge Drivers independently control the TwinJet discharge sections. Each driver accepts a TTL-compatible trigger input, allowing the two electrical discharges to be precisely synchronized with the pulsed valves, excitation laser, detector, and laboratory timing or data-acquisition system. Each PDD-100 operates from an 18 to 36 VDC power source and provides an SHV high-voltage output for connection to the corresponding discharge electrode assembly.

The independent configuration allows researchers to discharge both precursor streams, discharge only one stream, or introduce either stream without discharge depending on the reaction pathway being investigated. Valve timing, discharge timing, precursor concentration, buffer gas selection, backing pressure, and discharge conditions can be independently optimized for each side.

After passing through their respective discharge regions, the two gas streams enter a short mixing region near the nozzle throat. Reactive fragments generated in the separate channels are combined immediately before expansion into the vacuum chamber. This arrangement helps minimize premature reactions, precursor decomposition, wall reactions, and unwanted secondary chemistry.

The resulting supersonic expansion rapidly cools the reaction products, producing a pulsed molecular beam containing rotationally cold radicals and reactive intermediates. The TwinJet system is well suited for Laser-Induced Fluorescence (LIF), Dispersed Fluorescence (DF), emission spectroscopy, high-resolution molecular spectroscopy, and other gas-phase experiments requiring controlled generation of short-lived molecular species.

Kit Includes:

• One Ideal Spectroscopy TwinJet Dual Pulsed Discharge Jet Nozzle
• Two Ideal Spectroscopy PDD-100 Pulsed Discharge Drivers

Features Include:

• Complete TwinJet nozzle and dual discharge-driver combination
• Two independent high-speed pulsed valves
• Two isolated precursor and buffer-gas channels
• Two independently energized discharge sections
• Two PDD-100 Pulsed Discharge Drivers for independent discharge control
• Keeps separate precursor streams isolated until mixing near the nozzle throat
• Allows either, both, or neither precursor stream to be discharged
• Independent optimization of valve and discharge timing
• Rapid mixing immediately before supersonic expansion
• Generates radicals, transient molecules, and reactive intermediates
• Rapid supersonic cooling for rotationally cold molecular beams
• 18 to 36 VDC input power for each PDD-100 driver
• TTL-compatible triggering for precise synchronization
• SHV high-voltage outputs for connection to the discharge electrode assemblies

Typical Applications:

• Laser-Induced Fluorescence (LIF) spectroscopy
• Dispersed Fluorescence (DF) spectroscopy
• Emission spectroscopy
• Free radical and reactive intermediate generation
• Two-precursor reaction studies
• Supersonic molecular beam experiments
• Gas-phase reaction studies
• High-resolution molecular spectroscopy
• Physical chemistry research