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Article
Report number	arXiv:2401.11875
Title	Design and characterization of an antiproton deceleration beamline for the PUMA experiment
Author(s)	Fischer, Jonas (Darmstadt, Tech. U.) ; Schmidt, Alexander (Darmstadt, Tech. U.) ; Azaryan, Nikolay (CERN) ; Butin, François (CERN) ; Somoza, Jose Ferreira (CERN) ; Husson, Audric (Darmstadt, Tech. U.) ; Klink, Clara (CERN) ; Obertelli, Alexandre (Darmstadt, Tech. U.) ; Schlaich, Moritz (Darmstadt, Tech. U.) ; Sinturel, Alexandre (CERN) ; Thaus, Nicolas (CERN) ; Wienholtz, Frank (Darmstadt, Tech. U.)
Publication	2024-03-15
Imprint	2024-01-22
Number of pages	9
In:	Nucl. Instrum. Methods Phys. Res., B 550 (2024) 165318
DOI	10.1016/j.nimb.2024.165318 (publication)
Subject category	physics.ins-det ; Detectors and Experimental Techniques
Abstract	We report on the design and characterization of an antiproton deceleration beamline, based on a pulsed drift tube, for the PUMA experiment at the Antimatter Factory at CERN. The design has been tailored to high-voltage (100 kV) and ultra-high vacuum (below $10^{-10}$ mbar) conditions. A first operation achieved decelerating antiprotons from an initial energy of 100 keV down to ($3898\pm 3$) eV, marking the initial stage in trapping antiprotons for the PUMA experiment. Employing a high-voltage ramping scheme, the pressure remains below $2\cdot 10^{-10}$ mbar upstream of the pulsed drift tube for 75% of the cycle time. The beamline reached a transmission of ($55 \pm 3$)% for antiprotons decelerated to 4 keV. The beam is focused on a position sensitive detector to a spot with horizontal and vertical standard deviations of ${\sigma}_\mathrm{horiz}$ = ($3.0 \pm 0.1$) mm and ${\sigma}_\mathrm{vert}$ = ($3.8 \pm 0.2$) mm, respectively. This spot size is within the acceptance of the PUMA Penning trap.
Copyright/License	preprint: (License: CC BY 4.0) publication: © 2024 The Author(s) (License: CC BY 4.0)

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