Design of flat response plastic scintillator

The energy response curve of EJ232 without plating film was calibrated by the soft X-ray in Beijing Synchrotron Radiation Facility. The energy response curve of this type of EJ232 to less than 300 eV X-ray was obviously non-linear. According to the result, a new structure of EJ232 was designed and was achieved via vacuum magnetron sputtering. The calibration result of the designed EJ232 satisfied the request. The energy response of this kind of EJ232 to less than 1 keV X-ray has a good linearity, with a coefficient better than 99%. The simulation response result to Planckian spectrum indicates that the shape of output spectrum is similar to that of input spectrum. As a result, this designed EJ232 would be useful in the Z-pinch experiment.