Design, construction and quality control of resistive-Micromegas anode boards for the ATLAS experiment

Kuger, F.; Iengo, P.

doi:10.1051/epjconf/201817401013

Cited by 3 publications

(6 citation statements)

References 6 publications

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“…Pillars are 120 μm height, 200 μm wide and 1.2 mm long. More details about the PCB design can be found in [5].…”

Section: Anode Board Designmentioning

confidence: 99%

The industrial production of Micro Pattern Gaseous Detector: experience from the ATLAS Micromegas

Iengo

2023

J. Inst.

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Resistive Micromegas is one of the detector technologies chosen by ATLAS for the Phase-1 upgrade of the Muon Spectrometer, completed in 2022 in view of the LHC Run3 start. It is the largest MPGD-based detector system ever built, covering an active area of 1280 m2, providing trigger and precise tracking capabilities to the ATLAS Muon system and able to stand a radiation background rate up to 20 kHz/cm2. The heart of the ATLAS Micromegas detectors is the anode board, which carries the resistive protection layer, the readout electrodes and the insulating spacers supporting the micro-mesh. The production of the 2048 readout boards of size up to 0.5×2.2 m2 has been assigned to high-technology PCB industries and required dedicated efforts for technology transfer, production follow-up and quality assurance and control. The paper reviews the main challenges from the design phase to the completion of the project which spanned over several years. Emphasis is also put on the thorough quality assurance and quality control protocol established, the achieved results, as well as on the logistic, supply and schedule constraints. The lessons learned from this unprecedented MPGD project are also discussed.

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“…Pillars are 120 μm height, 200 μm wide and 1.2 mm long. More details about the PCB design can be found in [5].…”

Section: Anode Board Designmentioning

confidence: 99%

The industrial production of Micro Pattern Gaseous Detector: experience from the ATLAS Micromegas

Iengo

2023

J. Inst.

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“…In the high drift field region, above 0.6 kV/cm, more and more electric field lines from the drift region end on the mesh instead of reaching into the amplification region, thus more electrons are lost on the mesh. The absolute value of the transmission coefficient has been determined by a Garfield simulation [8] to be 0.87 ± 0.10 for our mesh and 0.6 kV/cm drift field.…”

Section: Gas Gainmentioning

confidence: 99%

“…The large-size Micromegas boards for the ATLAS muon system upgrade [3] are manufactured in industries. During the quality control of the first boards missing or weakly attached pillars have been observed [4]. In order to overcome this issue a new elongated pillar shape with a larger surface and, therefore, better adhesion was proposed.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Micromegas with elongated pillars

et al. 2017

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We present a resistive Micromegas detector built with two different pillar shapes. The pillars are elongated and extend in the direction orthogonal to the readout strips. One region features pillars of 2 mm × 0.2 mm with 4.8 mm pitch while in the other region the pillars extend over the full width of the detector. The larger surface of the pillars allows for a better adhesion to the readout structure and a more uniform amplification gap. Results on the detector performance for the two regions are presented. No striking performance differences between the two regions were found.

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“…The production process follows a multi-step processing that has been introduced in [4] and is graphically summarized in figure 8. While all individual processes are standard in PCB industries their uncommon combination, the large size of the PCBs and the stringent requirements for accuracy and quality (listed in figure 8) result in a serious challenge.…”

Section: A Pcb Production and Quality Requirementsmentioning

confidence: 99%

“…We reported on the design, production methods and quality control applied during the production of PCBs for full scale test-module (Module 0) construction throughout 2015 in [4]. Therefore this publication is focused on changes between the pre-series and final NSW PCB layout (section 2) and quality control methods (section 3).…”

Section: Introductionmentioning

confidence: 99%

Production and quality control of Micromegas anode PCBs for the ATLAS NSW upgrade

Kuger¹

2016

J. Inst.

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To exploit the full discovery potential of the Large Hadron Collider an upgrade towards high luminosity (HL-LHC) is scheduled for 2024-25. Simultaneously to the accelerator, the experiments have to adapt to the expected higher particle rates and detector occupancy. Within the next long shutdown in 2019-20 the innermost end-cap regions of the ATLAS Muon spectrometer will be replaced by the New Small Wheels (NSW) including Micromegas detector modules of several m 2 size.The Micromegas readout anode boards, representing the core components of the detector, are manufactured in industry, making the NSW Micromegas the first Micro Pattern Gaseous Detector (MPGD) for a major LHC experiment with a crucial industrial contribution. Production of the up to 2.2 m long boards is a serious challenge for industrialization technology and quality control methods.

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Design, construction and quality control of resistive-Micromegas anode boards for the ATLAS experiment

Cited by 3 publications

References 6 publications

The industrial production of Micro Pattern Gaseous Detector: experience from the ATLAS Micromegas

The industrial production of Micro Pattern Gaseous Detector: experience from the ATLAS Micromegas

Characterization of Micromegas with elongated pillars

Production and quality control of Micromegas anode PCBs for the ATLAS NSW upgrade

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