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.
|Number of pages||9|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|State||Published - Apr 11 1994|
Bibliographical noteFunding 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