Abstract
A new electrostatic Storage ring in Aarhus for PHoton Ion Reaction Analysis
(SAPHIRA) has recently been designed, set up, and commissioned at Aarhus
University. SAPHIRA is constructed in a square geometry (1 m x 1 m) and features a compact ion optical design with four modular corners and four straight sections where the stored ion beam is accessible for instance for interaction with photon pulses in both merged and crossed beam geometries. The straight sections are easily exchangeable without change to the ion optical lattice, which provide high flexibility for experiments with a stored ion beam. SAPHIRA was commissioned using a 5 keV ion beam of NO2- extracted from a hollow cathode discharge in a home build ion source and guided into the storage ring with the electrodes of one corner biased to zero potential.
Ion trapping was obtained by fast switching the electrodes of this
corner to a high potential. The subsequent decay rate of stored ions
as observed by a monitoring neutral fragments (N, O, and NO2) exiting
through a corner of the ring is displayed in the figure. After a few milliseconds of trapping, an exponential decay with a lifetime of ~45 ms was seen with a residual gas pressure of 10-8 mbar in the ring
(SAPHIRA) has recently been designed, set up, and commissioned at Aarhus
University. SAPHIRA is constructed in a square geometry (1 m x 1 m) and features a compact ion optical design with four modular corners and four straight sections where the stored ion beam is accessible for instance for interaction with photon pulses in both merged and crossed beam geometries. The straight sections are easily exchangeable without change to the ion optical lattice, which provide high flexibility for experiments with a stored ion beam. SAPHIRA was commissioned using a 5 keV ion beam of NO2- extracted from a hollow cathode discharge in a home build ion source and guided into the storage ring with the electrodes of one corner biased to zero potential.
Ion trapping was obtained by fast switching the electrodes of this
corner to a high potential. The subsequent decay rate of stored ions
as observed by a monitoring neutral fragments (N, O, and NO2) exiting
through a corner of the ring is displayed in the figure. After a few milliseconds of trapping, an exponential decay with a lifetime of ~45 ms was seen with a residual gas pressure of 10-8 mbar in the ring
| Original language | English |
|---|---|
| State | Published - 2013 |
| Event | 5th international Workshop on Electrostatic Storage Devices - Heidelberg, Germany Duration: 17 Jun 2013 → 21 Jun 2013 |
Conference
| Conference | 5th international Workshop on Electrostatic Storage Devices |
|---|---|
| Country/Territory | Germany |
| City | Heidelberg |
| Period | 17/06/13 → 21/06/13 |