Projekt

A Helmholtz coil control system for maintaining zero magnetic field at the Brorfelde geomagnetic Observatory

Udbyder

Vejleder

Sted

København og omegn

The geomagnetic observatory in Brorfelde has an important instrument calibration facility that includes a double 2 by 2 meter Helmholtz coil, wherein magnetometers are exposed to a controlled magnetic field that adds to the background natural geomagnetic field.  It would be a significant improvement if the natural field variations could be automatically cancelled out, by suitably varying the output of the Helmholtz coil.  In this project we propose to achieve this by taking advantage of real-time observations of the natural field made by a nearby 3-axis fluxgate magnetometer.

The goal of this project is to develop a system to control the coil power supply to very high precision using magnetometer data as input,  keeping the magnetic field in the middle of the coils constant (zero) within 1 nT.  It will involve work both at the geomagnetic observatory in Brorfelde and at the magnetometer lab in Lyngby. We will  first determine a transfer function for the control system (considering both frequency and delay) and then, after implementation, characterize its stability and noise level. As well as a zero field control system, we plan to extend the technique to simulate other magnetic fields, including specified constant fields, fields with a defined time variation (e.g. sine or square waves at different frequencies), and even dramatic magnetic events.  Such capabilities will greatly extend the range of the magnetometer calibration facility and aid the development of the next generation of Danish fluxgate magnetometers.

I samarbejde med

DTU Space

Forudsætninger

Mathlab, geomagnetism

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Kontakt

Virksomhed/organisation

DTU Space

Navn

Lars William Pedersen

Stilling

Ingeniør

Mail

lawp@space.dtu.dk

Vejleder-info

Bachelor i Geofysik og Rumteknologi

Vejleder

Lars William Pedersen

Medvejledere

Chris Finlay

Type

Bachelorprojekt, Fagprojekt, Specialkursus

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

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Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

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