Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Twin Orbit operation successfully tested at BESSY II

15.03.2018

The first “Twin Orbit User Test week” at BESSY II in February 2018 was a big success and can be considered as an important step towards real user operation. Physicists at Helmholtz-Zentrum Berlin have been able to store two separate electron beams in one storage ring. The twin orbit operation mode can serve users with different needs of the time structure of the photon pulses simultaneously and offers elegant options regarding the future project BESSY VSR.

The Twin Orbit operation mode makes use of non-linear beam dynamics and provides two stable well separated orbits for storing two electron beams in one storage ring. The bunch fill patterns of both orbits can be chosen, to some extent, independently, which allows for fulfilling normally incompatible user needs, simultaneously.


A synchrotron source point image of a bending magnet of the Twin Orbit modus. The second orbit closes after three revolution and is winding around the standard orbit at the center. Credit: HZB

For example, one orbit can be used to store a homogenous multi bunch fill to deliver high average brilliance for photon hungry experiments, whereas only one single bunch is stored on the other orbit for timing experiments, providing a much lower pulse repetition rate.

First experiments in 2015

It is a long process from an idea to a real operational week, especially at a running multi user facility. First studies of this mode started already 2015 at the smaller ring, the Metrology Light Source (MLS), resulting in a successful user experiment with the Physikalisch Technische Bundesanstalt (PTB) [1]. In parallel a group of HZB experts implemented and optimized this mode at BESSY II in single machine commissioning shifts.

Important milestones have been the operation of a large number of insertion devices as well as the topping up injection scheme to keep the stored current constant. In 2017 a successful overnight run with topping up injection and some participating beamlines gave confidence for a first longer test week [2].

Excellent availabilty of synchrotron light

The days of this “Twin Orbit User Test week” have been used for common experiments of machine group and beamline scientists in order to characterize this operational mode and generate feedback for further optimization. During the nights and the complete weekend ‘normal’ user time was scheduled with two different fill patterns (multibunch and single bunch) on both orbits. The availability and stability of the synchrotron source were comparable to the current standard user mode and exceeds/reaches 99 per cent.

Elegant option for BESSY VSR

“There is still a lot of work to do, but nevertheless this proof-of-principle week showed that a development towards a realistic user mode should be possible. And even more, for the future BESSY VSR project, it could be a very elegant way to separate short and long bunches”, Prof. Andreas Jankowiak concludes.

[1] http://accelconf.web.cern.ch/AccelConf/IPAC2015/papers/mopwa021.pdf

[2] http://accelconf.web.cern.ch/AccelConf/ipac2017/papers/wepik057.pdf

More Information on Twin Orbit Modus:

Dr. Paul Goslawski

Dr. Antonia Rötger | Helmholtz-Zentrum Berlin für Materialien und Energie GmbH

Further reports about: BESSY II HZB Helmholtz-Zentrum Orbit beamline electron beams storage ring

More articles from Physics and Astronomy:

nachricht A one-way street for light
15.11.2019 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht TU Graz researchers develop new 3D printing for the direct production of nanostructures
14.11.2019 | Technische Universität Graz

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New opportunities in additive manufacturing presented

Fraunhofer IFAM Dresden demonstrates manufacturing of copper components

The Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM in Dresden has succeeded in using Selective Electron Beam Melting (SEBM) to...

Im Focus: New Pitt research finds carbon nanotubes show a love/hate relationship with water

Carbon nanotubes (CNTs) are valuable for a wide variety of applications. Made of graphene sheets rolled into tubes 10,000 times smaller than a human hair, CNTs have an exceptional strength-to-mass ratio and excellent thermal and electrical properties. These features make them ideal for a range of applications, including supercapacitors, interconnects, adhesives, particle trapping and structural color.

New research reveals even more potential for CNTs: as a coating, they can both repel and hold water in place, a useful property for applications like printing,...

Im Focus: Magnets for the second dimension

If you've ever tried to put several really strong, small cube magnets right next to each other on a magnetic board, you'll know that you just can't do it. What happens is that the magnets always arrange themselves in a column sticking out vertically from the magnetic board. Moreover, it's almost impossible to join several rows of these magnets together to form a flat surface. That's because magnets are dipolar. Equal poles repel each other, with the north pole of one magnet always attaching itself to the south pole of another and vice versa. This explains why they form a column with all the magnets aligned the same way.

Now, scientists at ETH Zurich have managed to create magnetic building blocks in the shape of cubes that - for the first time ever - can be joined together to...

Im Focus: A new quantum data classification protocol brings us nearer to a future 'quantum internet'

The algorithm represents a first step in the automated learning of quantum information networks

Quantum-based communication and computation technologies promise unprecedented applications, such as unconditionally secure communications, ultra-precise...

Im Focus: Distorted Atoms

In two experiments performed at the free-electron laser FLASH in Hamburg a cooperation led by physicists from the Heidelberg Max Planck Institute for Nuclear physics (MPIK) demonstrated strongly-driven nonlinear interaction of ultrashort extreme-ultraviolet (XUV) laser pulses with atoms and ions. The powerful excitation of an electron pair in helium was found to compete with the ultrafast decay, which temporarily may even lead to population inversion. Resonant transitions in doubly charged neon ions were shifted in energy, and observed by XUV-XUV pump-probe transient absorption spectroscopy.

An international team led by physicists from the MPIK reports on new results for efficient two-electron excitations in helium driven by strong and ultrashort...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Laser Symposium on Electromobility in Aachen: trends for the mobility revolution

15.11.2019 | Event News

High entropy alloys for hot turbines and tireless metal-forming presses

05.11.2019 | Event News

Smart lasers open up new applications and are the “tool of choice” in digitalization

30.10.2019 | Event News

 
Latest News

Laser Symposium on Electromobility in Aachen: trends for the mobility revolution

15.11.2019 | Event News

Observing changes in the chirality of molecules in real time

15.11.2019 | Life Sciences

A step closer to cancer precision medicine

15.11.2019 | Health and Medicine

VideoLinks
Science & Research
Overview of more VideoLinks >>>