October 2002 LNF OPERA Collaboration Meeting BAM status

October 2002, LNF OPERA Collaboration Meeting BAM status report S. Buontempo, J. Dupraz, B. Chadaj • Vacuum check system • New welding tool • Automatic emulsion handling • Specs document • BAM project strategy • Outlook 1

Vacuum check systems On last July INFN has allocated funds to support BAM CERN based group activity for 2002 As a consequence we could: order the mass spectrometer, order Helium bombing system, cover all running costs of BAM CERN based group. The mass spectrometer Alcatel ASM 142 was delivered in August. The ETS Helium bombing system was delivered last week and will be calibrated next week. 2

Vacuum check systems to evaluate “brick lifetime” We know that brick lifetime in terms of vacuum will be defined by the convolution of 3 parameters: Delta pressure (initial pressure – threshold pressure) Buffer volume (volume you can fill staying under threshold pressure) Leakage rate 3

Vacuum check systems to evaluate “brick lifetime” We have defined the threshold pressure (500 mbar), initial pressure is under definition with firms. Buffer volume is 0. 3 cc using emulsion shape only. A larger (x 4) buffer volume can be obtained with a lead plate shaped like emulsion sheet. Test measurement can be performed at CERN. We have to be able to detect leakage rate both in invasive (for R&D phase) and not-invasive way (for BAM mass production) to evaluate package quality. 4

Vacuum check systems: mass spectrometer Sensitivity Specs: • 10 -11 Atm. cc/sec range (vacuum mode) • 10 -7 Atm. cc/sec range (sniffing mode). 5

Vacuum check systems: mass spectrometer The system was equipped with 3 test measurement lines to perform the measurements on: • Porosity of laminated paper • Envelopes • Origami bricks This measurement of leakage rate is invasive as it requires to perform the vacuum passing through the mass spectrometer 6

Vacuum check systems: test measure setup Envelope: welding QC Brick: welding, folding and edge stress QC This system will be used to perform QC on brick delivered by contacted firms, locating the main points of leakage in the brick packaging 7

Vacuum check systems: Helium bombing system ETS He-bombing system delivered at CERN last week. Calibration to be performed next week on bombing time, pressure and vacuum level for leakage measurement. The system is based on Alcatel mass spectrometer ASM 142 It allows a not-invasive measurement of leakage rate of our brick (global leakages, without indication on leakage location). We aim to use this method 8 on the BAM in mass production

Vacuum check systems: Helium bombing system Vacuum chamber up to 0. 01 mbar He Bombing chamber Max pressure 2 bar Mass spectrometer Here we force He to enter the brick at high pressure Here we measure the He inside the brick 9

Vacuum check systems: next future work plan In November we aim to have two systems (invasive and not-invasive) that allow us to quantitatively evaluate different package solutions in term of vacuum quality. We will measure and compare the quality of different welding and packaging techniques proposed by different firms (see later in BAM strategy). We have to start also the measurements on the aging effects on the various welding solutions. 10

New thermal welding tool Two samples of a new welding machine were delivered by Aldepack at CERN on last July 20 th. It allows fine tuning of welding condition in terms of: pressure, temperature and time 11

New thermal welding tool: upgrading needed Increase pressure Improve mechanical stability of contact during heating: • Invar resistance • Ceramic base Second version to be delivered to CERN in November and after validation being shipped to Nagoya 12

Automatic emulsion handling In July test beam 28 emulsion sheets were manipulated with emulsion handling prototype (Aldepack) delivered at CERN in June. After manipulation they were exposed to beam tests (uniform track density over full sheet surface), then developed at CERN under G. Rosa supervision and sent to Naples for scanning (see talk by L. Scotto) 13

Automatic emulsion handling Emulsions were handled with an array of 4 vacuum suckers. Handlings were performed at different vacuum level (14 sheets at 0. 3 14 and 14 sheets at 0. 6 bar)

Automatic emulsion handling It was also checked the effect of the emulsion pile stopping system In each group of 14 sheets, handlings were also performed at different position of suckers with respect to the emulsion edge (7 at 1. 5 cm and 7 at 3. 3 cm) to have different edge stresses due to the stopping system 15

BAM specs document 8 meetings have been done at CERN: April 25, Mai 2 -3, Mai 27 -28, Jun 17, July 2 -3, July 27, September 27, October 2 -3 The document is almost in final shape (~90 pages) and we aim to have last release in first half of November to close the phase of Project Scope&Initiation Still missing: • Technical specs of laminated paper • Technical specs of carton paper • Technical specs of lead • Emulsion: complete the list of prohibited materials, list of allowed materials usable near emulsion, constraints on emulsion handling 16

BAM project strategy (1) Human resources: BAM CERN based activity has been fully funded by INFN for 2002 and 2003 LNF BAM group being started up under A. Franceschi Coordination First training session of LNF technicians at CERN planned for mid November B. Chadaj has left officially BAM group since Oct 1 st. Negotiations with CERN management is going on to define the technical support 17

BAM project strategy (2) From now to BAM contract: Two steps procedure for firm selection firm pre-selection based on first contacts, visit, production of a hand made brick (quality check at CERN) and evaluation of draft economical and technical offer call for tender done by invitation of pre-selected firms in next spring Firm selection after summer 2003 Next future activities: test measurements on alternative welding, gluing etc, definition of milestones to follow up construction phase, preselection phase, administration for call for tender. 18

BAM project strategy (3) BAM schedule: Final specifications: november 2002 End of market search: march 2003 Technical audit: march 2003 Call for tenders: april to may 2003 Firm selection: june to july 2003 Ordering: august to september 2003 Construction and tests in the firm: october 2003 to december 2004 Delivery at Gran Sasso laboratory: january 2005 Assembly, installation: february 2005 Production acceptance tests at Gran Sasso: Brick mass production: march 2005 to june 2005 july 2005 to june 2006 19

Summary & Outlook BAM project activity is still running in despite of “management side conditions” Vacuum check systems have been defined, ordered and delivered at CERN. Mass spectrometer has been installed at CERN, helium bombing system is going to be calibrated on next week. New thermal welding tool delivered at CERN and being upgraded. Alternative welding possibilities (magnetic induction) under evaluation with expert firms in this sector. 20

Summary & Outlook First automatic emulsion handling test has been performed in July. August. Preliminary results presented (see L. Scotto talk) Spec document being released. It is fundamental for definition of BAM project and will be essential for firm contacts and selection. Its release terminates the phase of Project Scope&Initiation and starts the Project Planning&Execution Human resources allocated to BAM project: • K. H. + S. B. • LNF group is being started up • CERN technical support under negotiation 21