Impact of the Border Crossing Effects on the DCNU for Pixel Arrays Irradiated With High Energy Protons

Comparison of Methods to Calculate the Dark Current Nonuniformity

“…This method allows taking into account border crossing effects. But, previous works show that the border crossing effect is negligible when the ranges of recoil ions are much smaller than pixel dimensions [4]. However, if the dimensions of the depleted volume are in the order of the micrometer, this effect needs to be considered in the simulations [4].…”

“…A priori, the most straightforward way to predict the DCNU consists in a Monte Carlo algorithm [2][3][4] that directly reproduces the damage process. But historically, because the Monte Carlo method is CPU time consuming, faster alternate T ways were preferred [5][6][7][8][9][10][11][12].…”

“…The principle of these two approaches is similar but the methods of calculation differ slightly [13]. The method of prediction based on the Monte Carlo algorithm used in this study has been presented and compare to experimental data in detail in [3,4], but for the sake of clarity and the understanding of the study, the key points are reminded briefly here (cf. Fig.…”

“…At the array of pixels level, the convolution of the damage produced by different PKAs can be solved by a Monte Carlo algorithm. That means, randomly selecting the energy of the PKA in the differential interaction cross section [2,4], and calculating for each PKA the amount of produced damage. This calculation is 1) M.C.…”

“…repeated for each pixel, according to the number of interactions that have occurred in each pixel. But this Monte Carlo algorithm [2][3][4] is CPU time consuming, and this convolution can be performed [5][6][7][8][9][10][11][12] by a direct numerical integration [13]. Such alternative way of calculation has been developed first, and was very successful over the years.…”