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{\bf TTP92--28}\\
{\rm September 1992}\\
 }
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{\Large\bf
HEAVY QUARK PRODUCTION \\[3mm]
%COMPTON COLLIDERS}
AT A PHOTON LINEAR COLLIDER}
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{\large\bf J. H. K\"uhn, E. Mirkes and J. Steegborn}
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{\large   Institut f\"ur Theoretische Teilchenphysik\\
   Universit\"at Karlsruhe\\
   Kaiserstr. 12, Postfach 6980\\ \vskip0.3cm
   7500 Karlsruhe 1, Germany}
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{\bf Abstract}
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\begin{quote}
{\rm
Heavy quark production at future Compton colliders is investigated. 
The impact of polarization has been studied. Perturbative QCD corrections 
to the effective cross section are calculated and found to be at the 
level of 40\%
for a $e^+e^-$ collider of 500 GeV and a top quark mass of 150 GeV.
The $\eta_t$ resonance structure is incorporated.
}
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