1. Acceptance criteria, Materials, Methods and Techniques for cooling plant construction DCP WP4 status 3 March 2010

2. WP4 work breakdown structure

3. 3 March 2010 WP4 work breakdown structure

4. Leak tightness Studies on different leak search procedures and instrumentation Bibliography search for standards & studies done in refrigeration and vacuum technology Market survey on instrumentation available and filed of application Test set up to calibrate liquid vs gas leaks (testing with gas for guaranteeing liquid leak tightness) Work is on going both at CERN and at Cracow University of Technology https://espace.cern.ch/project-DCP- WP4/default.aspx 3 March 2010

5. Leak tightness Methods for leak measurements @ CERN Pressure drop with reference volume: new set-up being built (expected by May 2010, PH-DT+CMS) Inficon mass spectrometer: new calibration for fluorocarbon on CMS instrument, contacts with supplier for further gas/liquid calibration http://www.inficon.com/download/en/Ecotec%20E3000%20eng%20kiba22e1- d%20(0608).pdf (CV & CMS) http://www.inficon.com/download/en/Ecotec%20E3000%20eng%20kiba22e1- d%20(0608).pdf Adixen N2/H2 sniffer: plans for testing effects of H2 on joints http://www.adixen.com/adixen_avt/download/docs/prod/doc1prod77.pdf? nocache=1267586128 (CMS & PH-DT) http://www.adixen.com/adixen_avt/download/docs/prod/doc1prod77.pdf? nocache=1267586128 He in vacuum mode (PH-DT) Ultrasound leak detector under evaluation in CMS 3 March 2010

6. Leak tightness Test benches for leak measurements @ CERN Test bench for liquid vs gas leak test: E. Anttila set up being refurbished ( https://espace.cern.ch/project-DCP-WP4/Shared%20Documents/Papers/he-pf5060.pdf ) https://espace.cern.ch/project-DCP-WP4/Shared%20Documents/Papers/he-pf5060.pdf New calibrated leak being produced: few sizes for “leak repair” set-up, smaller sizes using gas chromatography columns 3 March 2010