6533b862fe1ef96bd12c6e95
RESEARCH PRODUCT
Detection system for forward emitted photons at the Experimental Storage Ring at GSI
T. KuhlDenis AnielskiDanyal WintersRubén López-cotoWilfried NörtershäuserWilfried NörtershäuserR. JöhrenJ. VollbrechtR. SánchezMatthias LochmannH.-w. OrtjohannChristopher GeppertVolker HannenCh. Weinheimersubject
PhysicsPhotomultiplierPhysics - Instrumentation and DetectorsPhotonIon beamAtomic Physics (physics.atom-ph)business.industryParabolic reflectorFOS: Physical sciencesIon currentInstrumentation and Detectors (physics.ins-det)Photon countingPhysics - Atomic PhysicsOpticsbusinessInstrumentationMathematical PhysicsBeam (structure)Storage ringdescription
A single photon counting system has been developed for efficient detection of forward emitted fluorescence photons at the Experimental Storage Ring (ESR) at GSI. The system employs a movable parabolic mirror with a central slit that can be positioned around the ion beam and a selected low noise photomultiplier for detection of the collected photons. Compared to the previously used system of mirror segments installed inside the ESR the collection efficiency for forward-emitted photons is improved by more than a factor of 5. No adverse effects on the stored ion beam have been observed during operation besides a small drop in the ion current of about 5% during movement of the mirror into the beam position. The new detection system has been used in the LIBELLE experiment at ESR and enabled for the first time the detection of the ground-state hyperfine M1 transition in lithium-like bismuth (209Bi80+) in a laser-spectroscopy measurement.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-09-26 | Journal of Instrumentation |