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

TL;DR

This paper reports on measurements of charge transfer inefficiency in high-speed column-parallel CCDs, crucial for improving vertex detectors in future linear collider experiments.

Contribution

It introduces a test setup for measuring CTI in CPCCDs and explores their performance across various readout speeds and temperatures.

Findings

CTI increases with higher readout frequencies.

Lower temperatures reduce charge transfer inefficiency.

High-speed CPCCDs show promise for future collider detectors.

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. A test stand for measuring the charge transfer inefficiency (CTI) of a prototype CPCCD has been set up. Studies of the CTI have been performed at a range of readout frequencies and operating temperatures.