Title of article
The HERMES polarized 3He internal gas target
Author/Authors
DeSchepper، نويسنده , , D. and Kramer، نويسنده , , L.H. and Pate، نويسنده , , S.F. and Ackerstaff، نويسنده , , K. and Carr، نويسنده , , R.W. and Court، نويسنده , , G.R. and Dvoredsky، نويسنده , , A. and Gao، نويسنده , , H. and Golendoukhin، نويسنده , , A. and Hansen، نويسنده , , J.-O. and Holler، نويسنده , , Y. and Jones، نويسنده , , C.E. and Kelsey، نويسنده , , J.F. and Kinney، نويسنده , , E. and Korsch، نويسنده , , W. and Lee، نويسنده , , K.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1998
Pages
29
From page
16
To page
44
Abstract
The HERMES experiment is investigating the spin structure of the proton and neutron via deep-inelastic scattering of polarized positrons from polarized nuclear targets. The polarized positrons are provided by the HERA positron storage ring at DESY, Hamburg, Germany. The targets are pure internal gas targets. Data acquisition began in 1995, utilizing a polarized 3He internal gas target to study the spin structure of the neutron. The target gas was polarized using the metastability-exchange optical-pumping technique and then injected into a cryogenically cooled target cell. The target was designed to operate with either longitudinal or transverse directions of polarization. Operating conditions included polarizations of up to 54% and target thicknesses of 1×1015 nucleons/cm2. In this paper the HERMES polarized 3He internal gas target is described in detail.
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
1998
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2180092
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