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A simple counter-flow cooling system for a supersonic free-jet beam source assembly.
1Centre for Organic Electronics, University of Newcastle, Callaghan, NSW 2308, Australia.
The Review of Scientific Instruments
|June 3, 2016
Summary
A new, inexpensive cooled free-jet beam source using counter-flow nitrogen cooling is presented. This design offers rapid implementation and stable temperature control down to 100 K for enhanced beamline experiments.
Area of Science:
- Physics
- Physical Chemistry
- Engineering
Background:
- Free-jet expansion is crucial for generating supersonic molecular beams.
- Achieving low temperatures in beam sources is essential for high-resolution spectroscopy and cluster science.
- Existing cooled beam sources can be complex and expensive.
Purpose of the Study:
- To describe a simple, inexpensive, and effective cooled free-jet beam source.
- To detail a design that facilitates easy implementation and alignment.
- To demonstrate precise temperature control for advanced applications.
Main Methods:
- The design utilizes off-the-shelf tube fittings for straightforward assembly.
- An integrated cooling system employs a counter-flow of chilled nitrogen.
- The entire stagnation volume is cooled, enabling precise temperature regulation.
Main Results:
- The source assembly achieves temperatures as low as 100 K.
- Long-term temperature stability is demonstrated to be better than ±1 K.
- The design allows for rapid implementation and straightforward alignment with beamline apertures.
Conclusions:
- This cooled free-jet beam source offers a cost-effective and user-friendly solution.
- The precise temperature control and stability are suitable for demanding scientific applications.
- The design's simplicity and use of standard components make it highly accessible.
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