ATLAS BIS MDT wiring facility D. Fassouliotis P. Ioannou C. Kourkoumelis V. Pancheluga D. Pappas E. Stefanidis V. Birioukov (engineer from Protvino) UNIVERSITY OF ATHENS Visit our web-page at:

AIM: Wire/check all the Monitored Drift Tubes for the ATLAS BIS chambers 30,000 !! Tubes – 128 chambers (8 layers) Construction specifications……: Wire position ± 25 μm Wire tension 350 ± 15 gr Gas leak rate < bar*l/sec at 3 bar Leak at 3.4 kV (gain 1.6*10 5 ) < 2nA/m ……necessary to achieve such physics results : H  μμμμ

TO ACCOPLISH AIM: Build a clean room 20±1 o C Class 50,000 Develop a wiring table+wiring tools Flat top Tube holders Alignment of two end-plug-holders End-plug insertion (coaxility tube/end-plug) Tube pressure crimping Speed of wire threading Wire tensioning Develop on-line QA of tube construction parameters Length check End-plug/tube axis coaxiality Wire tension SITE WAS CERTIFIED ON MAY 1999

Greek delegate to CERN Council, Professor Emmanuel Floratos (front, centre), accompanied by members of the Greek team, with the first ATLAS muon chamber built in Greece installed in the x-ray tomograph at CERN. …the first precision chamber to come off a production line was built by a collaboration of three Greek universities and it arrived at CERN from Thessaloniki on 5 August. This chamber is the first complete model of 1200 that will be built around the world over the next few years.…. First ATLAS muon chamber arrives from Greek production line CERN Bulletin 33/99; 16 August 1999

FIRST CHAMBER FROM 17 SITES IN 9 COUNTRIES TO PASS ALL TESTS (13 μm position fluctuation of wire) CERN Courier, October 2000 Verifying the alignment of interferometer beam optics on the ATLAS experiment's X-ray tomograph at CERN. A small muon chamber from Greece, destined for the barrel region of the detector, is on the tomograph. It went on to pass the test with its wires showing an average fluctuation of just 13  m from their nominal positions. To pass the test, a chamber has to score less than 20  m.

…Micromechanics Electronics… …Automation The tools we use ….