Design of a custom permanent magnet pair and their holder that allows application of the magnetic fields of up to 1 T in the gap between the magnets. Central bore in the magnets allows laser beam access for laser spectroscopy of atomic vapour contained in a spectroscopic cell placed between the magnets. A distance between the magnets can be adjusted, continuously adjusting magnetic field.
This is a part of the setup used for providing frequency reference for laser locking for atomic physics experiments. As a part of optical setup for Zeeman Shifted Atomic Reference (ZSAR), it can provide locking signal for lasers up to ~19 GHz away from the unperturbed D transitions in Rubidium atoms. Signal is generated from sub-Doppler spectroscopy of atomic transitions, has low drift siutable for atomic physics experiments, and can be controllably tuned in wide range of frequencies. For more details see reference below.
| Label | Title | File types | Material | Manufacturing method/supplier | Quantity |
|---|---|---|---|---|---|
| #1 | magnet | .step, .stl, | NdFeB | first4magnets | x2, opposite polarity |
| #2 | magnet_holder | .step, .stl | brass | CNC milling | x2 |
| #3 | handle | .step, .stl, | brass | CNC milling | x2 |
| #4 | magnet_body_holder | .step, .stl | aluminium | CNC milling, sand blasted | x2 |
| #5 | magnet_base_separator | .step, .stl, | aluminium | CNC milling, sand blasted | x1 |
| #6 | top_magnet_holder_separator | .step, .stl, | aluminium | CNC milling, sand blasted | x1 |
Click on individual .stl files in parts/ folder to see 3D parts in browser.
Technical drawings for all parts are provided in parts/technical_drawings.pdf.
Schematics of full assembly is provided in assembly/.
Photo of assembled setup setup is provided in assembly/photo_of_assembly.jpg.
Note that two magnets have their north and south poles oriented such that they form Helmholtz pair.
Original design: Massayuki Kondo (Federal University of Santa Catarina, UFSC, Florianópolis, Brasil); Modifications: Dominic Reed (Durham University, Durham, UK)
All distributed files are provided subject to Creative Commons - Attribution 3.0 license (CC BY 3.0). A copy of the license is provided.