Skip to ContentSkip to Navigation
About us Latest news News News articles

PhD Ceremony Marlène da Silva e Silva

19 February 2010

On 19 February Marlène da Silva e Silva will defend her thesis 'Sensitive polarimetry in a search for the deuteron electric dipole moment'.

Location: Academy Building, Broerstraat 5, Groningen

Time: 13:15 hrs.

Promotor: K. Jungmann
Co Promotor: C.J.G. Onderwater

Sensitive polarimetry in a search for the deuteron electric dipole moment

The quest for new Physics constitutes one of the main endeavors in physics research. Searches for permanent Electric Dipole Moments (EDMs) in fundamental systems have a wide window to discover Physics beyond the Standard Model. A proposal exists that promises a sensitivity to an EDM of the deuteron at a level of 10−29 The experiment relies on the interaction between the EDM of the deuteron and the radial motional electric field a relativistic particle experiences in the field of a magnetic storage ring, which would cause the spin of the particle to precess. A non-zero EDM manifests itself by a change in the polarization component along the magnetic field. To monitor this signal, a novel highly efficient polarimeter concept has been investigated. In addition, this polarimeter must be robust against systematic errors and able to continuously monitor the beam polarization, guaranteeing optimal sensitivity. Detailed studies on systematic error control were carried out at KVI, in addition to the measurement of cross sections and analyzing powers necessary for precise simulations. Measurements conducted at COSY-Jülich in Germany yielded the predicted high efficiencies. With these efficiencies and the developed understanding of systematic effects it was possible to track changes in polarization at the level of a few hundred parts-per-million. The developed polarimeter concept is appropriate for reaching the aimed sensitivity of a deuteron EDM experiment.

Marlène da Silva (Portugal, 1982) studied astronomy in Porto. The research was financed by the Netherlands Organization for Scientific Research NWO.

Last modified:25 January 2019 11.14 a.m.
printView this page in: Nederlands

More news

  • 04 March 2021

    Prof. Lude Franke awarded Vici grant

    The Dutch Research Council (NWO) has awarded Prof. Lude Franke a Vici grant worth € 1.5 million. The Vici grant will enable him to develop innovative lines of research for the next five years. Vici is one of the largest personal academic grants...

  • 04 February 2021

    Molecule from nature provides fully recyclable polymers

    Plastics are among the most successful materials of modern times. However, they also create a huge waste problem. Scientists from the University of Groningen (The Netherlands) and the East China University of Science and Technology (ECUST) in...

  • 10 December 2020

    Aletta Jacobs Chairs: 15 female professors appointed

    On International Women’s Day this spring, Rector Magnificus Cisca Wijmenga announced that the UG would be creating 15 new chair positions for female professors, known as the Aletta Jacobs Chairs. Fifteen female professors will soon start their work...