Cold CAS Ion Trap (CCIT)

The CAS cryogenic ion trap is a versatile tool that extends CAS laboratory domain to ion-molecule interaction at cold temperatures. Closed cycle cryostat allows us to reach temperatures lower than 4 K for the neutral buffer gas. The radio frequency 22 pole ion trap assures very well defined trapping and cooling conditions for the ions from the lightest ion H+ (mass 1) up to several hundred mass units. Differential pumping and complete separation of fore-vacuum of the ion source and the interaction regions allows studies with minimal influence of the ion precursor gas to the ion-neutral of choice interactions. Various light sources from infrared (IR) to visbile (VIS), in combination with our ion trap, permit sensitive action spectroscopy
studies.

CCIT setup with a zoom-in view of the 22 pole trap.

In memory of Professor Dieter Gerlich (29.09.1944-15.10.2020), for starting the CAS Ion Trap Laboratory and for his continuous inspiration.

Dieter Gerlich (1944-2020) mounting the first parts of the ion trap in Lab D (now dedicate to his memory)
Rate coefficients as a function of temperature for the eightHxDx+ + H2/D2 reactions studied in the 22pole trap experiments. For details see: Jiménez-Redondo, M., et al.: A&A,692, A121 (2024), https://doi.org/10.1051/0004-6361/202451757
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