Authors: H Brückmann D Finken L Friedrich
Publish Date: 1969/10/01
Volume: 224, Issue: 5, Pages: 486-500
Abstract
Die Autoren danken Herrn Prof Dr HSchopper für sein förderndes Interesse an dieser Arbeit An den vorbereitenden Diskussionen zu diesen Experimenten hat sich Herr N PJohnson Lake Forest University Illinois USA beteiligt Den Herren cand phys VBechtold KHamdi und ESeitz danken wir für ihre Hilfe bei der Durchführung der Experimente Außerdem danken wir Herrn DiplIng PFluck Herrn HKeim und HerrnP Ziegler für ihre tatkräftige Hilfe bei den technischen ProblemenAn experimental method to produce polarized negative hydrogen ions is discussed and compared with other methods The method makes use of the different lifetimes of the metastable 2S 1/2 state and the 2P 1/2 state of the hydrogen atom Polarized ion beams are obtained by using a selective quenching process followed by selective ionisation Experimental results are given for the intensity and polarization of the polarized negative ion beam of deuterons These results were obtained as a function of the quenchingfield the magnetic field in the argoncell and the density of argon and cesium The yield of negative ions can be expressed by the cross sections for the different charge exchange reactions in argon The measured tensorpolarisationP33 can be interpreted as a function of the cross sections the argondensity and the magnetic field along the beam axis Beams of 50 nA intensity were produced with a polarization ofP33=−0250±0006 The main advantage of this method is a low beam emittance values of 07 cm rad eV1/2 were achieved The production of a polarized positive deuteron beam seems to be possible
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