Magnetisation and Measurement Event

Magnetisation & Measurement Event 🗓

Scheduled Archive Events Magnetometers Webinars
Magnetisation and Measurement Event

A one-day event on the magnetisation of magnets in isolation and in assemblies such as motors, and the associated measurement of magnetic fields . Brought to you by the UK Magnetics Society.

Quantum Design’s Randy Dumas will be giving a talk (please scroll down for further details)

Magnetic technologies play an increasingly critical role in products of all kinds, from simple kitchen cabinet catches to the complex motors in electric cars and much more. Simply put, the modern world would not be possible without magnets. This seminar will look at magnetic components in manufacturing and the  assembly process – when they come into the production line, how they need to be handled, when and how their magnetic fields are created, the impact of the field on the rest of the assembly process, how the field specification is confirmed, etc.

These subjects are critical to any company manufacturing products using any kind of magnet – incorrect magnet handling can lead to damaged products, increased costs, line shutdown, and significant HSE concerns, amongst other issues.

Speakers from industry and academia from the UK and Europe will highlight the state of the art in these capabilities


CHAIRS

  • Jeremy Tompkins, Vacuumschmelze GmbH & Co KG
  • Graeme Finch, NPL
  • Philip Keller, Metrolab

Talk from Quantum Design at the Event

A Geometry-Independent Moment Correction Method for the MPMS3 SQUID-Based Magnetometer

by Randy Dumas of Quantum Design, Inc.

The modern superconducting quantum interference device (SQUID) magnetometer is incredibly sensitive, with the ability to resolve magnetic moments ~1E-8 emu. More specifically, the MPMS3 SQUID-based magnetometer from Quantum Design utilizes two complimentary techniques to measure the DC magnetic moment of a sample. The DC-scan mode uses a traditional linear extraction technique, whereas the SQUID-VSM mode oscillates the sample with a small amplitude, both within a 2nd order gradiometer. While the ultimate measurement sensitivity is determined primarily by the SQUID detection circuitry, the measurement accuracy is strongly affected by the size, shape, and centring of the sample. If the experimental sample differs in size and/or shape from the calibration sample additional scale factors need to be applied to improve measurement accuracy. Most significantly, a radial offset of the sample within the gradiometer not only adversely affects the accuracy most, but is also difficult to measure and therefore account for in the calculation of any post-measurement corrective scale factors. In this talk I will show that the measured moments extracted from the DC-scan and SQUID-VSM modes are not only related to one another, but that this relation is surprisingly independent of sample size, shape, and radial offset. By exploiting this trend, a geometry-independent correction factor can be calculated by simply measuring a sample, which may have an arbitrary shape, size, and radial offset, using both DC-scan and SQUID-VSM modes, thus greatly improving measurement accuracy utilising a simple post-processing algorithm.


Key Speakers

  • David Schwarzer
  • John Dudding, Robin Cornelius, & James Clewett
  • Luc Van Bockstal
  • Chris Riley
  • Jonas Walter
  • Daniel Brunt
  • Randy Dumas
  • Govind Bisht
  • Lukasz Mierczak

Keep up to date with our latest product news and developments. Join our mailing list

Follow us:

 

Keep up to date with our latest product news and developments. Join our mailing list

Top