High magnetic field atomic spectroscopy (up to 1 Tesla)

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.

File list and assembly

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.

Reference / Cite as

Original design: Massayuki Kondo (Federal University of Santa Catarina, UFSC, Florianópolis, Brasil); Modifications: Dominic Reed (Durham University, Durham, UK)

Cite as: D. J. Reed, N. Šibalić, D. J. Whiting, J. M. Kondo, C. S. Adams, K. J. Weatherill, "Low-drift Zeeman shifted atomic frequency reference", OSA Continuum 1, 4-12 (2018).

Licence

All distributed files are provided subject to Creative Commons - Attribution 3.0 license (CC BY 3.0). A copy of the license is provided.