Author/Authors :
Garabatos، نويسنده , , C and Karig، نويسنده , , W and Müntz، نويسنده , , C and Steigerwald، نويسنده , , A and Stroth، نويسنده , , J and Wüstenfeld، نويسنده , , J and Zentek، نويسنده , , A and Bethge، نويسنده , , K and Chernenko، نويسنده , , S and Fateev، نويسنده , , O and Glonti، نويسنده , , L and Smykov، نويسنده , , L and Zanewsky، نويسنده , , Yu and Bokemeyer، نويسنده , , H and Koenig، نويسنده , , W and Stelzer، نويسنده , , H and Zumbruch، نويسنده , , P، نويسنده ,
Abstract :
A set of low-mass drift chambers designed for the tracking of di-electrons in the HADES spectrometer is presented. Short radiation length is ensured by using a Helium-based gas mixture and aluminium cathode wires, whereas the acceptance is maximised by limiting the width of the side frames of the detectors. The measured performance of these devices, which improves with increasing concentration of quencher gas, is shown and discussed. Position resolutions down to 70 μm have been obtained under stable operation. Long-term gain stability is also reported.
