The FILTEX/HERMES polarized hydrogen atomic beam source

F. Stock, K. Rith, H. G. Gaul, B. Lorentz, H. Mairon, B. Povh, E. Steffens, D. Toporkov, K. Zapfe, F. Rathmann, D. Fick, W. Korsch, G. Graw, K. Reinmüller, P. Schiemenz, W. Haeberli

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


The FILTEX/HERMES atomic beam source (ABS) for polarized hydrogen is described. Recent improvements concern mainly the optimization of the beam forming system and a new design of the sextupole magnet system. For a precise measurement (error 5%) of the output flow a calibrated compression tube was installed. The output flow of 0.81×1017 H atoms per second in two hyperfine substates was constant within 2% in a long-term measurement over 16 h. At the FILTEX test experiment, the target density in the storage cell fed by the ABS was constant within the experimental error of 4% over a period of four months.

Original languageEnglish
Pages (from-to)334-342
Number of pages9
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number2-3
StatePublished - Apr 11 1994

Bibliographical note

Funding Information:
For experiments which propose to use polarized internal targets in storage rings, e.g. FILTEX [7,81 or * Corresponding author . * * Supported partly under various contracts by the Bun-desministerium für Forschung and Technologie, Bonn . 1 Permanent address: Institute for Nuclear Physics, 630090 Novisibirsk, Russia . Z Now at DESY, D 22603 Hamburg, Germany. 3 Now at California Institute of Technology, Pasadena, CA 91125, USA.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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