Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiation hardness study on a CMOS pixel sensor for charged particle
  tracking   A CMOS pixel sensor, named Supix-1, is developed for a pixelated silicon
tracker for the Circular Electron-Positron Collider (CEPC) project. The sensor,
consisted of nine sectors varying in pixel sizes, diode sizes and geometries,
is fabricated with a 180 nm CMOS Image Sensor (CIS) process to study the
particle detection performance of enlarged pixels. In this work, the
radiation-induced effects on the charge collection of the sensor under the
fluence of 1 $\times$ 10^13 1 MeV neq/cm^2 are studied by the measurements with
the radioactive source of Fe-55 and the Technology Computer Aided Design (TCAD)
simulations, since the radiation hardness of 6.8 $\times$ 10^12 1 MeV neq/cm^2
per year for Non-Ionizing Energy Loss (NIEL) effects is required. In
measurements, the sensor gain has been calibrated using the k-$\alpha$ peak of
Fe-55 before and after irradiation. The pixel-wise equivalent noise charge
(ENC), charge collection efficiency (CCE) and signal-to-noise ratio (SNR) were
evaluated. The radiation-induced effects on cluster properties are studied
through a self-developed reconstruction algorithm. In TCAD simulations, charge
collections in 5 $\times$ 5 pixel matrixes for two typical impinging cases of
incident particles were simulated with and without irradiation. Both
measurements and simulations indicate that enlarged pixels with area of 21
$\mu$m $\times$ 84 $\mu$m, though suffering greater loss on sensor performance
than small pixels do, still have satisfactory noise and charge collection
performance after irradiation for particle tracking in the upcoming collider
detectors.

2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg