CERN Accelerating science

ATLAS Note
Report number	ATL-MUON-PROC-2017-001
Title	Design of the ATLAS New Small Wheel Gas Leak Tightness Station for the Micromegas Detector Modules
Author(s)	Gazis, Evangelos (National Technical University of Athens) (+)
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2017
Imprint	27 Jan 2017
Number of pages	4
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	Micromegas detectors, gas system, gas leak tightness
Abstract	In this work we describe advanced data processing and analysis techniques intended to be used in the gas tightness station at CERN for Quality Assurance and Quality Control of the New Small Wheel Micromegas Quadruplets. We combine two methods: a conventional one based on the Pressure Decay Rate and an alternative-novel one, based on the Flow Rate Loss. A prototype setup has been developed based on a Lock-in Amplifier device and should be operated in conjunction with the gas leak test via the Flow Rate Loss. Both methods have been tested by using emulated leak branches based on specific thin medical needles. The semi-automatic data acquisition, monitoring and processing system is presented also in this work while a more sophisticated environment based on the WinCC-OA SCADA is under development.
Copyright/License	Preprint: (License: CC-BY-4.0)