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Stored and Cooled Ions Division
 
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Master and bachelor theses

Master/Bachelor thesis in detector physics:
Silicon Photomultiplier detector array for 3D-imaging at Cryogenic Storage Ring

Atomic and molecular quantum dynamics group - CSR

Our team is looking for Master and Bachelor students for various projects at the Cryogenic Storage Ring (CSR). The here proposed position includes optimization of a new Silicon Photomultiplier detector array for fast timing readout of a cryogenic detector at CSR.

The cryogenic Storage Ring CSR
The cryogenic Storage Ring CSR

You can learn about:

  • Advanced detector readout and data acquisition
  • Molecular quantum dynamics
  • A pioneering, worldwide-unique research facility
  • Analysis of large datasets, datamining
  • Storage ring and accelerator physics
  • Labview/ROOT/python programming

Your tasks:

  • Development of optimization methods for existing Silicon Photomultiplier (SiPM) detector array
  • Tuning the detector performance towards best timing resolution (<1 ns)
  • Application of 3D imaging within CSR merged-beams measurements on molecular ion fragmentation
  • Data analysis
  • Staying interested in and supporting other CSR projects

You can enjoy:

  • Working in an international, gender-balanced team
  • Support from electronics and precision mechanics workshops and in-house engineering design office
  • Nature-surrounded working place with a good bus connection

Interested? We will be happy to hear from you!
More Master positions are available at CSR, do not hesitate to ask!

Physics background:

At CSR we are interested in understanding fundamental molecular reactions. We store molecular ions in the cryogenic environment of CSR for hundreds of seconds so that they internally relax towards their ro-vibrational ground state. Then the ions collide, e.g., with electrons from a collinear electron beam, so that electron capture at various collision energies can be investigated. This electron-ion recombination process is normally followed by fragmentation of the resulting neutral complex and the reaction products are collected in a dedicated cryogenic detector. Beyond counting the reaction events, the detector also provides information on the transverse impact positions of the fragments, and even on the impact time differences. This so-called 3D imaging approach then tells about the excitation state of the reaction products and about the reaction dynamics, so that, e.g., even electron orbital of the captured electron can be identified. Such fundamental studies are used to understand the quantum dynamics of reactions on molecules in a well-defined quantum state, thus supporting and boosting also related theoretical calculations. The upgrade of the detector by the SiPM readout will significantly improve the timing resolution, allowing to investigate a much broader range of reactions at CSR in detail.

 

Contacts:

Dr. Oldřich Novotný ()
PD Dr. Holger Kreckel external Link ()
Prof. Dr. Klaus Blaum ()

Selected CSR publications:

Kálosi, Á. et al., Phys. Rev. Lett. 128, 183402 (2022) external Link
Grieser, M. et al., Rev. Sci. Instr. 93, 063302 (2022) external Link
Müll, D. et al., Phys. Rev. A 104, 032811 (2021) external Link
Novotný, O. et al., Science, 365, 676 (2019) external Link
Kreckel, H. et al., Philos. Trans. Royal Soc. A 377, 0412 (2019) external Link
Meyer, C. et al., Phys. Rev. Lett. 119, 023202 (2017) external Link
O’Connor, A. P. et al., Phys. Rev. Lett 116, 113002 (2016) external Link
Von Hahn, R. et al., Rev. Sci. Instr. 87, 063115 (2016) external Link