Instrumentation for measurement of in-flight annihilations of 130 keV antiprotons on thin target foils

K. Todoroki, D. Barna, R. S. Hayano, H. Aghai-Khozani, A. Sótér, M. Corradini, M. Leali, E. Lodi-Rizzini, V. Mascagna, L. Venturelli, V. Prest, L. Vallazza, D. De Salvador, M. Hori

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We describe the instrumentation for an experiment to measure the cross sections of antiprotons with kinetic energies of 130±10 keV annihilating on carbon, palladium, and platinum target foils of sub-100 nm thicknesses. A 120 ns long pulsed beam containing 105–106 antiprotons was allowed to traverse the foils, and the signal annihilations that resulted from this were isolated using a time-of-flight method. Backgrounds arose from Rutherford scattering of the antiprotons off the target foils, their annihilations in the target chamber walls, and π→μ→e decay of the charged pions that emerged from the annihilations. Some antiprotons slowed down and annihilated in the contamination on the target surfaces. This reduced the signal-to-background ratio of the measurement.

Original languageEnglish
Pages (from-to)110-118
Number of pages9
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume835
DOIs
Publication statusPublished - Nov 1 2016

Keywords

  • Annihilation
  • Antiproton
  • Nuclear cross section

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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    Todoroki, K., Barna, D., Hayano, R. S., Aghai-Khozani, H., Sótér, A., Corradini, M., Leali, M., Lodi-Rizzini, E., Mascagna, V., Venturelli, L., Prest, V., Vallazza, L., De Salvador, D., & Hori, M. (2016). Instrumentation for measurement of in-flight annihilations of 130 keV antiprotons on thin target foils. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 835, 110-118. https://doi.org/10.1016/j.nima.2016.08.026