FIGURE 9.

UTIC2 chamber response tested in the 9 MeV flash electron beam at SIT in a PMMA phantom. The UTIC2 absolute collected charge at +300 V (b) and −150 V (a) bias voltage is correlated with the flash‐diamond readout used as reference field detector. Solid line indicates the ideal linear chamber response while the dashed line corresponds to the expected performance from simulation. For simulation, the volume recombination constant α was fixed to 0.42 $\times {10}^{-12}$m ³ s ⁻¹