The discussion centers on the effects of the permanent magnetic field produced by Penning gauges on vacuum chamber experiments, particularly those involving silicon chips, optical fibers, and quantum dots. Participants highlight the advantages of Penning gauges over Bayard-Alpert gauges, such as reduced contamination and increased sensitivity. However, concerns are raised regarding the potential interference of stray magnetic fields with experimental measurements. Clarity on the specific objectives and methodologies of the experiments is deemed essential for assessing the impact of these magnetic fields.
PREREQUISITESResearchers and engineers working in vacuum technology, particularly those involved in semiconductor and quantum dot experiments, will benefit from this discussion.
Well, what is your experiment?Remi said:What is the efect of the permanent magnetic field in a Penning gauge on the outside environment (meaning my vacuum chamber)? Penning gauges seem to show several advantages compared to Bayard-Alpert ones (strongness, contamination...) but this magnetic field may spoil my experiment.
Gokul43201 said:Well, what is your experiment?
That conveys absolutely nothing about the actual experiment, and it is impossible to determine if tiny stray fields will hurt your experiment if we don't know what the experiment is trying to measure. And what do you mean by "at least quantum dots"?Remi said:It is an experiement with silicon chips and optical fibers, and at least quantum dots.
THe OP is concerned about the magnetic fields from his/her Penning Gauges (this is an ionization type vacuum gauge that uses a magnetic field to increases the path length of the ions), and I think, wants to know if his/her experiment in the vacuum chamber will be affected by the stray field.Chronos said:I second Gokul's motion, the objective and methodology is unclear. The permanent magnetic field part confused me. I don't perceive that as being relevant.