arXiv subjects

Joerg Pretz

Publications and source records attributed to Joerg Pretz.

5 recordsLinked to original sources

arXiv2024

Compact beam position monitor using a segmented toroidal coil

A new, compact beam position monitor based on segmented a toroidal coil surrounding the charged particle beam has been investigated. It makes use of the induced voltages in the windings instead of the induced charge imbalance on capacitor plates in the conventional beam position monitors. We theoretically investigate the response of the coils to the bunched particle beam based on a lumped element model and compare it with measurements in the laboratory and in the storage ring COSY, in terms of beam displacement. As to the frequency response of the coils, we find a resonant behavior, which may be exploited to increase the sensitivity of the device further. The resolution presently achieved is about 5 micrometer in a one second time interval for a beam current of 0.5 mA.

physics.acc-ph↗

arXiv2022

Electric Dipole Moment Measurements at Storage Rings

Electric Dipole Moments (EDMs) of subatomic particles, are considered as one of the most powerful tools to study CP-violation beyond the Standard Model. Such CP-violating mechanisms are searched for to explain the dominance of matter over anti-matter in our universe. This paper discusses EDM searches of charged hadrons in storage rings. The document focuses on activities at the existing storage ring COSY at Forschungszentrum Jülich, Germany and the design of a 100\,m circumference prototype ring able to demonstrate key technologies and components. These include simultaneous clockwise and counter-clockwise beam operation with electrostatic bending elements and, by adding a magnetic field, the frozen spin technique.

hep-ex↗

arXiv2022

Event Weighting vs. Event Counting

Goal of these proceedings is to introduce a method based on event weighting in particle physics experiments. Weighting means that events are not just counted as integer numbers but are assigned a weight factor according to their importance in the analysis. This method has a close connection to the maximum likelihood method known to reach the smallest statistical error. The purpose of this document is to give a more educational overview on the subject. As an example the extraction of a beam polarization from scattered particles is discussed.

physics.data-an↗

arXiv2011

Nucleon Spin Structure and Parton Distribution Functions

This article gives an overview over recent results on quark and gluon helicity distributions obtained in deep inelastic lepton nucleon scattering and proton proton interactions. Future experimental programs to study the nucleon structure will be discussed as well.

hep-ex↗

arXiv2010

A different way to read off the time - A new idea for a binary clock

A new idea for a binary clock is presented. It displays the time using a triangular array of 15 bits. It is shown that such a geometric, triangular arrangement is only possible because our system of time divisions is based on a sexagesimal system in which the number of minutes in 12 hours equals the factorial of a natural number (720=6!).

math.HO↗