Experimental test of the prototype system of Laser-driven Ion-beam Trace Probe (LITP)*

The LITP method, first proposed in 2014, is suggested to diagnose both the poloidal magnetic field and radial electric field in tokamaks [1,2]. Recently a prototype system of LITP was setup to validate the reconstructing method in the PKU Plasma Test (PPT) device. The prototype system includes two parts: the laser accelerator, and the scintillator detector. In the experiments, some engineering problems were fixed, such as the docking of laser-accelerator to plasma device, the protecting and shielding of the detector, error analysis, and calibration of the system. This is a key step for LITP to be applied on the tokamak plasma diagnostics.

[1] Yang et al. Rev. Sci. Instrum. 85(11), 11E429 (2014).

[2] Yang et al. Rev. Sci. Instrum. 87(11), 11D610 (2016).