Cryogenic Gas-jet Cooling
Cryogenic Gas-jet Cooling - Related Videos
08:21
Permeabilization of Adhered Cells Using an Inert Gas Jet
0 Views •
Cited by 3 •
2013
This protocol describes a method for the temporary permeabilization of adherent cells using an inert gas jet. This technique facilitates the transfer of genetic material and biomolecules into adherent mammalian cells by the utilization of mechanical forces to disrupt the plasma membrane.
11:21
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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Cited by 1 •
2017
We present a parametric driving method to cool an ultracold Fermi gas in a crossed-beam optical dipole trap. This method selectively removes high-energy atoms from the trap by periodically modulating the trap depth with frequencies that are resonant with the anharmonic components of the trapping potential.
08:34
Cryogenic Liquid Jets for High Repetition Rate Discovery Science
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Cited by 18 •
2020
This protocol presents the operation and principles of micron-scale cylindrical and planar cryogenic liquid jets. Until now, this system has been used as a high repetition rate target in laser-plasma experiments. Anticipated cross-disciplinary applications range from laboratory astrophysics to material science, and eventually next-generation particle accelerators.
03:15
Rabbit Embryo Vitrification Using Cryogenic Straw: An Ultra-Rapid Cooling Technique to Preserve Rabbit Embryos for Long-term Storage
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2025
In this video, we describe the procedure for vitrification of harvested rabbit embryos at desired development stage using ethylene glycol and dimethyl sulfoxide as cryoprotectants and cryogenic straw as the carrier system. The vitrified embryos have high survival rate and can be stored for an extended period until use.
09:50
Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures
0 Views •
Cited by 4 •
2017
A protocol for determining the vitreous phase densities of micro- to pico-liter size drops of aqueous mixtures at cryogenic temperatures is described.
FAQs
As pressurized cryogenic gas passes through a nozzle, it expands and its temperature decreases. The resulting high-velocity stream reaches the target surface, where forced convection transfers heat from the surface into the moving gas. The gas then transports that heat away, allowing the cooling effect to remain concentrated near the directed jet rather than across the entire surrounding system.
The nozzle converts the pressurized gas supply into a directed, high-velocity jet. Its function therefore extends beyond simply releasing the coolant: it determines where the cold stream reaches the target and helps concentrate heat removal in a selected region. This directional delivery supports localized cooling of surfaces, components, or processes without requiring direct contact with a liquid.
A gas jet transfers heat through a directed stream rather than spreading a liquid across the target. Because the flow is noncontact and focused, engineers can cool a selected region while limiting effects on nearby areas. This characteristic is useful when the cooled region must be controlled precisely or when applying a liquid would leave unwanted residue.
Forced convection provides the heat-transfer pathway between the target and the moving cryogenic gas. Heat leaves the surface and enters the flow, while the stream carries that heat away from the cooling zone. The effectiveness of the process therefore depends on maintaining a directed flow that reaches the intended surface and continues transporting absorbed heat.
A typical setup supplies cryogenic gas under pressure, routes it through a nozzle, and directs the resulting jet at the surface, component, or process requiring cooling. The flowing gas absorbs heat through forced convection and carries it away. Engineers then use the localized delivery to confine cooling to the selected region and simplify control of the thermal treatment.
The essential arrangement includes a pressurized cryogenic gas source, a nozzle, and a target positioned within the directed jet. The nozzle must deliver the stream toward the intended cooling region, while the flowing gas removes absorbed heat. This configuration supports noncontact operation and helps engineers manage where cooling occurs without relying on a liquid coolant layer.
Engineers may select this approach for machining, thermal testing, precision manufacturing, and cooling temperature-sensitive materials or equipment. It is especially relevant when localized, noncontact heat removal is desirable, when residue from liquid coolants is a concern, or when the cooled region needs simpler control. These advantages connect the method to both manufacturing and experimental engineering environments.