Speaker
Description
The new design concept of the Micro Pixel Chamber ($\mathrm{\mu}$-PIC) has been developed and tested for charged particles tracking. The $\mathrm{\mu}$-PIC is a 2D gaseous imaging detector made by the PCB technique. One of the most important property is that the $\mathrm{\mu}$-PIC does not require any floating structures and stretching processes.
For protecting the $\mathrm{\mu}$-PIC from discharges, the resistive electrode layer is formed on the top substrate. Recently, Diamond Like Carbon (DLC), made by the carbon sputtering and the lift-off process, has been developed for resistive electrodes. This novel material has excellent properties that fine patterning (<10 $\mathrm{\mu}$m), strong adhesion on the polyimide, wide range resistivity setting (100k$\mathrm{\Omega}$/sq. - 1G$\mathrm{\Omega}$/sq.), uniform resistivity at large detection area, and so on. High gas gains (>10000) were observed with the prototype of the $\mathrm{\mu}$-PIC with DLC cathodes. This prototype was operated stably in the high rate fast neutrons environment more than 1MHz/cm$\mathrm{^2}$. Also, two dimensional tracking performances of charged particles have been measured using SRS.
