In order to guarantee an excellent PID at SCTF, two Cherenkov counters are proposed as one possible design option of the final SCTF detector. Both detectors use the method of detection of internally reflected Cherenkov light, what is called the DIRC concept. The main purpose of these DIRCs is to separate pions and muons up to a momentum of 1 GeV/c with a $4\pi$ angular coverage.
Two endcap DIRCs are proposed that cover the forward and backward regions. They consist of a thin fused silica radiator plate each, with attached focusing optics. A third DIRC detector, that will contain fused silica bars and expansion volumes, is going to be designed in a barrel shape around the $e^+e^-$ interaction point. The concept of these detectors is based on existing models that have already been developed for the PANDA detector at FAIR.
This talk will mainly cover the simulation studies that are currently ongoing, which aim to optimize the performance of these detectors with respect to the Cherenkov angle resolution and timing information. The results of these simulations will be used to identify the best optical parameters and readout systems for both detectors. According to the actual plan, silicon photomultipliers (SiPMs) with a high granularity are going to be used to measure single Cherenkov photons. Special optics is going to be required for obtaining a high detector resolution. In addition to that, it will be important to use fast readout electronics to correct for dispersion effects of the created Cherenkov light in fused silica.