TUXAUD01
MPI-K, Heidelberg, Germany
* Presented by Andreas Wolf for the CSR team
** R. von Hahn et al., Nucl. Instrum. Methods B 269, 871 (2011).
*** C. Krantz et al., J. Phys. Conf. Proc. 300, 122010 (2011).
| Paper | Title | Page |
|---|---|---|
TUXAUD01 |
First Operation of the Heidelberg Cryogenic Storage Ring CSR for Low-Energy Collision Measurements With Molecular Ion Beams | |
|
||
|
The cryogenic storage ring CSR** has performed its first cryogenic beamtime in the first half of 2015. All vacuum chambers and ion optics of the electrostatic ring of 35 m circumference were cooled well below 10 K. Positive and negative ion beams were stored with energies of 60 keV at storage time constants that exceeded 2000 s in some cases. In the extremely low residual gas pressures, products of collisional beam loss reactions became in many cases unobservable. Laser-induced photodetachment was observed from various atomic and molecular ions including O-, OH-, CH+, (Co2)-, (Ag2)-, (Co3)-. Photodetachment signals were used to monitor the ion beam lifetime. Populations of rotational levels in OH− were monitored by photodetachment near threshold with a tunable laser. Radiative cooling of the OH− ions was tracked over >5 min when more than 90% of the ions were found in the J=0 state. Schottky signals of the ions were monitored over similar time intervals, indicating a slow increase of the momentum spread of the ions. Ion beam energies at CSR will reach up to 300 keV·q and a photocathode electron cooler is being installed for phase space cooling and collision experiments***.
* Presented by Andreas Wolf for the CSR team ** R. von Hahn et al., Nucl. Instrum. Methods B 269, 871 (2011). *** C. Krantz et al., J. Phys. Conf. Proc. 300, 122010 (2011). |
||
|
|
Slides TUXAUD01 [21.717 MB] | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |