Measurement of total soft Xray energy of high power Zpinch plasma with a Nifilm bolometer

A Nifilm bolometer driven by the pulsed constantvoltage supply was developed. The method of measuring the total soft Ｘray energy and the measuring system was presented. A Nifilm detector was developed and calibrated for the dependence with temperature . This bolometer has been applied in measuring the total soft Ｘray energy for the high power Zpinch plasma produced from QiangguangI accelerator. The uncertainty of the measurment was analyzed.