Article on BASE appears in CERN's EP-news
Stefan Ulmer on
A short overview-article on BASE has been released in CERN's EP-newsletter.
Research Prizes for BASE Members
Stefan Ulmer on
BASE members Takashi Higuchi and Andreas Mooser received research prizes for their work in BASE.
Takashi Higuchi was awarded a poster prize at the LEAP2016 conference in Kanazawa, Japan, which was sponsored by Nature Physics.
For his PhD thesis, in which he performed the first direct high-precision measurement of the magnetic moment of a single trapped proton, Andreas Mooser received the PhD thesis-prize of GSI Darmstadt and the prize of the friends of the University of Mainz. Andreas' work contains the most precise measurement of the proton magnetic moment, the work was carried-out at the BASE-Mainz experiment.
Congratulations!
A Reservoir Trap for Antiprotons
Stefan Ulmer on
We developed a technique to extract arbitrary fractions of antiprotons in a reservoir trap. This method enables us to operate BASE almost independent from accelerator cycles, and especially during the winter shut-down when magnetic field noise in the antiproton decelerator hall is low. For further details read this article.
Comparison of the Antiproton to Proton Charge to Mass Ratio
Stefan Ulmer on
In a paper published today in Nature we report the high-precision comparison of the antiproton-to-proton charge to mass ratio. In our measurements we compared the cyclotron frequencies of antiprotons to that of negatively charged hydrogen ions, which are used as a proxy for the proton. We achieved a fractional precision of 69 parts in a trillion, which corresponds in our magnetic field of 1.95 Tesla to an absolute energy resolution of 2mHz. Our result is consistent with CPT invariance.
IUPAP Prize 2014
Anonymous on
BASE member Stefan Ulmer has been selected to receive the IUPAP Young Scientist Prize 2014 in Fundamental Metrology. With this prize the International Union of Pure and Applied Physics (IUPAP) honors his work on proton and antiproton magnetic moment measurements.
First Direct High Precision Measurement of the Proton Magnetic Moment
Stefan Ulmer on
In a paper just published in Nature we report on the first direct high precision measurement of the proton magnetic moment. By application of the elegant double Penning trap technique we achieved a fractional precision of 3.3 parts per billion. Our value is consistent with the currently accepted CODATA value, but 2.5 times more precise.
CERN Fellowhip awarded to C. Smorra
Stefan Ulmer on
Congratulations, BASE member Dr. Christian Smorra applied successfully for one of the highly competitive CERN fellowships. We are thankful for the very strong support by CERN.
Demonstration of the Double Penning Trap Technique
Stefan Ulmer on
In a just in Physics Letters B published article we report on the first successful demonstration of the double Penning trap technique with a single proton. This is a major step towards a measurement of the particle's magnetic moment with ppb precision. The method can be applied to the antiproton, which will enable one of the most sensitive tests of CPT symmetry with baryons.
CERN Research Board Approves BASE
Stefan Ulmer on
In today's Research Board meeting the BASE project was approved. CERN supported the approval by an article in the CERN bulletin.
CERN SPSC Recommends BASE Approval
Stefan Ulmer on
The BASE technical design report was evaluated by the SPSC. The committee recommended approval of the BASE project to the research board. Our TDR contains a detailed description of our experiment and a feasibility study for implementation of BASE into the Antiproton Decelerator facility. We acknowledge the strong support of the CERN groups which contributed to to this study.Special thanks to Lajos Bojtar for the coordination.
Pages
