Sliding type self-tensioning method for installing and manufacturing large-area GEM detector

Abstract

The invention discloses a sliding type self-tensioning method for installing and manufacturing a large-area gas electron multiplier (GEM) detector. The sliding type self-tensioning method comprises a GEM film fixing method and a method for applying a tension force on the GEM film. Two kinds of pad strips are used for fixing a drift electrode and four edges of a GEM film. The first kind of pad strips are arranged in the middle between the drift electrode and the GEM film edge; and the second kind of pad strips are arranged at positions, approaching corner, of the two ends of the drift electrode and the GEM film edge. Sliding blocks are fixed at the outer sides of the two kinds of pad strips; and screw holes are formed in the outer sides of the sliding blocks. Clamp grooves are formed in the main frame; the parts, with the screw holes, of the outer sides of the sliding blocks are clamped into the clamp grooves for positioning; and through holes are formed in the walls of the clamp grooves; and bolts pass through the through holes and are screwed into the screw holes for tensioning. According to the invention, the method has all advantages of the self-tensioning method but problems that exist when the GEM detectors with the levels above nanometer level are manufactured are solved. Therefore, the provided method has the high design flexibility and can be used for manufacturing large-area GEM detectors with all shapes and various dimensions.

Description

technical field

[0001] The invention relates to a method for manufacturing a large-area GEM detector, in particular to a sliding self-tensioning method for installing and manufacturing a large-area GEM detector.

[0002] Definitions of abbreviations and key terms in the present invention:

[0003] MPGD: Micro-Pattern Gaseous Detector, microstructure gas detector;

[0004] GEM: Gas Electron Multiplier, gas electron multiplier;

[0005] NS2: No-Stretch No-Spacer self-tensioning method. Background technique

[0006] In large-scale nuclear and particle physics experiments, gas detectors such as silk chambers and resistive plate chambers have been widely used. However, with the development of nuclear and particle physics experiments, the requirements for the count rate capability and position resolution capability of detectors are getting higher and higher, and these traditional gas detectors can no longer fully meet the experimental requirements. Drawing lessons from the fin...

Examples

specific Embodiment approach

[0039] The sliding type self-tensioning method for the installation and manufacture of large-area GEM detectors of the present invention, its preferred specific implementation is:

[0040] Including the method of fixing the GEM film and the method of applying tension to the GEM film;

[0041] The fixed method of the GEM film comprises:

[0042] Two types of pads are used to fix the four edges of the drift electrode and the GEM film respectively, wherein the first type of pad is located in the middle of the edge of the drift electrode and the GEM film, and the second type of pad is located between the drift electrode and the GEM film. The positions of the two ends of the edge of the film near the corners;

[0043] The method for applying tension to the GEM film includes:

[0044] The slider fixed on the outside of the two types of pads and the main frame with a slot, the outside of the slider is provided with a screw hole, the main frame is provided with a slot, and the outsi...

specific Embodiment

[0049] Taking a GEM detector with an effective area of ​​100cm×50cm stretched simultaneously by the drift electrode and the three-layer GEM film as an example, its air gap structure is "3-3-2-2-2", that is, between the drift electrode and the transom The air gap of the detector is 3mm, the air gap of the drift zone of the detector is 3mm, and the air gap of the first, second transmission zone and guide zone is 2mm.

[0050] 1. The design scheme of the internal movable pad:

[0051] The internal spacer is used to fix the GEM film in the vertical direction, and when it is pulled by the external bolt, it is responsible for driving the GEM film to move in the direction of the force until the internal tension of the GEM film is balanced with the external tension. The pads can be divided into two types according to the length. The first type is placed on the non-corner area of ​​the edge of the GEM film, and the length is relatively large (about 44mm); the second type is used to be ...

technical field

[0001] The invention relates to a method for manufacturing a large-area GEM detector, in particular to a sliding self-tensioning method for installing and manufacturing a large-area GEM detector.

[0002] Definitions of abbreviations and key terms in the present invention:

[0003] MPGD: Micro-Pattern Gaseous Detector, microstructure gas detector;

[0004] GEM: Gas Electron Multiplier, gas electron multiplier;

[0005] NS2: No-Stretch No-Spacer self-tensioning method. Background technique

[0006] In large-scale nuclear and particle physics experiments, gas detectors such as silk chambers and resistive plate chambers have been widely used. However, with the development of nuclear and particle physics experiments, the requirements for the count rate capability and position resolution capability of detectors are getting higher and higher, and these traditional gas detectors can no longer fully meet the experimental requirements. Drawing lessons from the fin...

Examples

specific Embodiment approach

[0039] The sliding type self-tensioning method for the installation and manufacture of large-area GEM detectors of the present invention, its preferred specific implementation is:

[0040] Including the method of fixing the GEM film and the method of applying tension to the GEM film;

[0041] The fixed method of the GEM film comprises:

[0042] Two types of pads are used to fix the four edges of the drift electrode and the GEM film respectively, wherein the first type of pad is located in the middle of the edge of the drift electrode and the GEM film, and the second type of pad is located between the drift electrode and the GEM film. The positions of the two ends of the edge of the film near the corners;

[0043] The method for applying tension to the GEM film includes:

[0044] The slider fixed on the outside of the two types of pads and the main frame with a slot, the outside of the slider is provided with a screw hole, the main frame is provided with a slot, and the outsi...

specific Embodiment

[0049] Taking a GEM detector with an effective area of ​​100cm×50cm stretched simultaneously by the drift electrode and the three-layer GEM film as an example, its air gap structure is "3-3-2-2-2", that is, between the drift electrode and the transom The air gap of the detector is 3mm, the air gap of the drift zone of the detector is 3mm, and the air gap of the first, second transmission zone and guide zone is 2mm.

[0050] 1. The design scheme of the internal movable pad:

[0051] The internal spacer is used to fix the GEM film in the vertical direction, and when it is pulled by the external bolt, it is responsible for driving the GEM film to move in the direction of the force until the internal tension of the GEM film is balanced with the external tension. The pads can be divided into two types according to the length. The first type is placed on the non-corner area of ​​the edge of the GEM film, and the length is relatively large (about 44mm); the second type is used to be ...

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