A New Technology for Fast Two-Dimensional Detection of Proton Therapy Beams
Figure 6
An example of calibration pulse height distribution from theFe calibration source embedded in the Micromegas chamber with mesh at −590 V. The pulse height is strongly dependent on the mesh potential, and somewhat dependent on the ambient temperature and pressure. The position of the main peak is used as a daily gain calibration for the Micromegas. The smaller peak is the Argon escape peak.
