Author/Authors :
Brack، نويسنده , , J.T. and Belz، نويسنده , , J.E. and Clark، نويسنده , , S. and Ely، نويسنده , , J. and Fox، نويسنده , , B. and Hofman، نويسنده , , G.J. and Kinney، نويسنده , , E.R. and Mercer، نويسنده , , D.J. and Rakness، نويسنده , , G. and Ristinen، نويسنده , , R.A. and Smythe، نويسنده , , W.R. and Warner، نويسنده , , D.، نويسنده ,
Abstract :
The design, construction and operation of the HERMES forward (front) tracking chambers and associated electronics are described. Resolution and limited aging tests have been performed on these drift chambers, which use an Ar/CF4/CO2 (90 : 5 : 5) gas mixture. No degradation in chamber performance has been observed for a cumulative charge in excess of 9 C/cm.
Keywords :
Wire chamber , CF4 gas , Aging studies Radiation damage , Resolution studies , HERMES spectrometer
