Modeling of Charge Transfer Inefficiency in a CCD with High Speed Column Parallel Readout

TL;DR

This paper develops an analytic model to evaluate charge transfer inefficiency in high-speed column-parallel CCDs, aiding the design of faster, more efficient detectors for high energy physics experiments.

Contribution

It introduces a new analytic model for CTI in CPCCDs, validated against TCAD simulations, enabling rapid assessment of device performance under various conditions.

Findings

Analytic model agrees with TCAD simulations on CTI values.

Model allows study of CTI dependence on temperature, frequency, and occupancy.

Supports development of faster CCD readout systems for physics experiments.

Abstract

Charge Coupled Devices (CCDs) have been successfully used in several high energy physics experiments over the past two decades. Their high spatial resolution and thin sensitive layers make them an excellent tool for studying short-lived particles. The Linear Collider Flavour Identification (LCFI) collaboration is developing Column-Parallel CCDs (CPCCDs) for the vertex detector of a future Linear Collider. The CPCCDs can be read out many times faster than standard CCDs, significantly increasing their operating speed. An Analytic Model has been developed for the determination of the charge transfer inefficiency (CTI) of a CPCCD. The CTI values determined with the Analytic Model agree largely with those from a full TCAD simulation. The Analytic Model allows efficient study of the variation of the CTI on parameters like readout frequency, operating temperature and occupancy.