Mainz 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 68: Instrumentation XVIII

HK 68.4: Vortrag

Donnerstag, 31. März 2022, 17:00–17:15, HK-H4

Test measurement of the HISPEC plunger device at IKP Cologne — •Lisa Kornwebel¹, Christoph Fransen¹, Marcel Beckers¹, Andrey Blazhev¹, Alfred Dewald¹, Felix Dunkel¹, Jan Jolie¹, Casper Lakenbrink¹, Claus Müller-Gatermann², Franziskus von Spee¹, and Stefan Thiel¹ — ¹Institut für Kernphysik, Köln, Deutschland — ²Physics Division, Argonne National Laboratory, IL, USA

The HISPEC plunger, developed and built by our group, is a core device for the HISPEC-DESPEC program which is part of the NUSTAR collaboration within FAIR. This device will be used for the measurement of level lifetimes in exotic nuclei at FAIR with the recoil distance Doppler-shift method. In order to prove the precision of this device, excited states of ¹⁸¹Ta with well-known lifetimes were re-investigated in a test measurement with stable beam at the FN-Tandem accelerator facility at Cologne to determine absolute distances of the very large target and degrader foils in two perpendicular axes. We will present the results with respect to the foil parallelism and the repeat accuracy of these absolute distances. We will further relate the results to an independent measurement of the foil separations with an optical distance measurement system. This work was supported by the BMBF, grant No. 05P19PKFNA.