Concentric ring type large-area silicon drift detector, design method and application

Abstract

The invention belongs to the technical field of detectors, and discloses a concentric ring type large-area silicon drift detector, a design method and an application. The design method comprises the following steps: calculating the width distribution of electrodes and resistors of a detector; calculating the electric field voltage distribution of the silicon drift detector; determining a drift electric field and an optimal drift path from a point S1 to a point S2 during drift; determining the design of the rear surface of the silicon drift detector; and designing a floating electrode. The SDDcarrier drift behavior rule and the heavily doped electrode growth are analyzed. A double-sided electrode which has double-sided correlation, maintains a uniform electron drift electric field and provides a smooth drift track is designed, and an innovative design and manufacture mode of high energy resolution of soft X-ray particles with the intensity of 0.5-15keV and efficient SDD collection is established. A layer of divider resistor is deposited between the electrodes of the concentric circle type silicon drift detector by utilizing an ALD technology, so that the concentric circle type detector can normally work without an additional voltage divider.

Description

technical field [0001] The invention belongs to the technical field of detectors, and in particular relates to a concentric ring type large-area silicon drift detector, a design method and an application. Background technique [0002] At present, the closest existing technology: At present, the core technology of domestic pulsar navigation - the research work of high energy resolution unit and SDD array SDD is seriously lagging behind. Domestic research mainly focuses on the manufacturing process of a small-area single SDD. The research on X-ray detectors in the world is developing towards the silicon drift chamber detector technology with low power consumption and high energy resolution to meet the requirements of high performance, large area coverage and high availability of the X-ray pulsar autonomous navigation and timing system. Significant technical needs. In the detector family, the concentric ring detector has been used for a long time, and its performance is relat...

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Problems solved by technology

[0006] (3) Small-area concentric ring-shaped cylindrical detectors have high symmetry and good electrical performance, but the dead zone of the array formed by them is too large, and the performance has declined

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