Control circuit of anode grounding photomultiplier and gating control method
A technology of photomultiplier tube and control circuit, which is applied in the direction of electrical components, electronic switches, pulse technology, etc., can solve the problems that PMT cannot be used, and achieve the effect of reducing complexity
Pending Publication Date: 2022-06-21
天美仪拓实验室设备(上海)有限公司 +1
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Problems solved by technology
[0009] The cathode-grounded PMT is very simple, but the disadvantage is that it cannot be used for single-photon counting PMTs
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[0055] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0056] Unless expressly stated otherwise, throughout the specification and claims, the term "comprising" or its conjugations such as "comprising" or "comprising" and the like will be understood to include the stated elements or components, and Other elements or other components are not excluded.
[0057] In this document, for convenience of description, spatially relative terms, such as "below", "below", "under", "above", "above", "over", etc., may be used to describe one element or feature with respect to another Relationship of elements or features in the drawings. It is to be understood that spatially relative terms are intended to encompass different orientations of items in use or operation in addition to the orien...
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The invention relates to a control circuit and a gating control method of an anode grounding photomultiplier, the photomultiplier comprises a photoelectric cathode, a first multiplication stage, a second multiplication stage and a third multiplication stage, and the control circuit further comprises a square wave driving signal input port, an isolation transformer, a rectification circuit and a gating circuit which are connected in sequence; a primary side of the isolation transformer is connected with the driving signal input port, a center tap of a secondary side of the isolation transformer is connected with the photoelectric cathode, and the secondary side of the isolation transformer is connected with the rectifying circuit; the isolation transformer is used for outputting current to supply power to the gating circuit when receiving the square wave driving signal; and when current is input into the gating circuit, the electric connection is switched on, so that the potential difference between the first multiplication stage, the second multiplication stage and the third multiplication stage and the photoelectric cathode is 0 to reduce the PMT gain. According to the invention, the square wave driving signal is used for simultaneously triggering the time gating circuit and supplying power to the time gating circuit. When the gate driving signal is provided at the circuit input end, the time gating circuit is powered on, and the PMT gain is reduced.
Description
technical field [0001] The invention relates to the field of gate control circuits of photomultiplier tubes, in particular to a control circuit and a gate control method of an anode grounded photomultiplier tube. Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] The photomultiplier tube (PMT) is the detector of choice for high-performance photoluminescence spectrometers because of its excellent photosensitivity and ability for steady-state and time-resolved measurements. A PMT is a vacuum tube that contains a photocathode, a series of electron multipliers called dynodes, and an anode; electrons are pushed from the cathode to the anode by applying a high voltage (HV). [0004] When a ...
Claims
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Login to View More IPC IPC(8): H03K17/78
CPCH03K17/78H03K2217/0081
Inventor 约翰·麦金托什德克·纳特
Owner 天美仪拓实验室设备(上海)有限公司