TY - JOUR TI - Measurements of radio frequent cavity volt ages by X-ray spectrum measurements AU - Toprek Dragan JN - Nuclear Technology and Radiation Protection PY - 2005 VL - 20 IS - 2 SP - 35 EP - 39 PT- Article AB- This paper deals with X-ray spectrum measurement as a method for the measurement of radio frequent cavity voltage and the theory of X-ray spectrum calculation. Experimental results at 72 MHz for three different values of the radio frequent power of ACCEL K250 super conducting cyclotron are being presented.