This paper reports the recent results of measurements on the effect of plasma heating on enhancement of the ion flux in GAMMA 10. Recently, by using its end-loss flux, a study of the divertor simulation experiment has been started in the tandem mirror GAMMA 10. From its large size and unique characteristics, we can expect that unique divertor simulation experiments, which could not be held in other simple, linear divertor simulation machines, can be performed in GAMMA 10. In the experiment, it was found that high ion temperature of the end-loss ion flux was already achieved. In addition, ion cyclotron range of frequency (ICRF) heating in the anchor region was found to be very effective to increase the end-loss ion flux, which supports the huge potential of GAMMA 10 for the divertor simulation experiment.