Sliding self-tensioning method for installation and fabrication of large area gem detectors
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A detector and sliding technology, which is used in the field of large-area GEM detectors, can solve the problems of prone to wrinkles on the edge of the membrane, membrane tension, and poor airtightness of the detector, and achieves the effect of strong design flexibility.
Active Publication Date: 2017-11-28
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology
But when the size of the detector exceeds 1 meter, several obvious problems begin to appear: 1) The tension on the membrane becomes uneven, and the edge of the membrane is prone to wrinkles
2) The air leakage of the side holes on the frame for bolts to pass through becomes serious, and the airtightness of the detector becomes worse
3) The above two problems will become more and more obvious as the size further increases. When the size of the detector increases to a certain extent (depending on the bolt specification, frame thickness and the specific design of the detector), the bolt may even be blocked by the frame. Stuck and unable to tension the membrane
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specific Embodiment approach
[0039] The preferred specific implementation of the sliding self-tensioning method for the installation and manufacture of large-area GEM detectors of the present invention is:
[0040] Including the method of fixing GEM film and the method of applying tension to GEM film;
[0041] The method for fixing the GEM film includes:
[0042] Two types of mats are used to fix the drift electrode and the four edges of the GEM film respectively. The first type of mat is located in the middle of the edge of the drift electrode and the GEM film, and the second type of mat is located between the drift electrode and the GEM film. The two ends of the film edge are close to the corners;
[0043] The method of applying tension to the GEM film includes:
[0044] A sliding block fixed on the outer side of the two types of pads and a main frame with a clamping groove, the outer side of the sliding block is provided with a screw hole, the main frame is provided with a clamping groove, and the outer side of...
specific Embodiment
[0049] Take a GEM detector with an effective area of 100cm×50cm, where the drift electrode and three GEM films are stretched simultaneously, as an example, the 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 the guide zone are all 2mm.
[0050] 1. The design scheme of the internal movable cushion:
[0051] The inner pad 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 cushion strips 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 with a larger length (about 44mm); the second type is used to place th...
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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 type self-tensioning method for installation and manufacturing of a large-area GEM detector. [0002] Definitions of abbreviations and key terms in the present invention: [0003] MPGD: Micro-Pattern Gaseous Detector, micro-structured 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 counting rate and position resolution capabilities of the detectors are getting higher and higher, and these traditional gas detectors can no longer fully meet the experimental requirements. Drawing on the fine processing ...
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