OPERA bricks LNGS G.Rosa, C.Sirignano Emulsion Workshop, 7-9 December 2006

Development facility commissioning Last October and November several activities took place at LNGS, every week at least 5 people (Bari, Bologna, Roma and Salerno) were on shift in order to be ready to handle real bricks. Dark room set up (safe lights) Climatization tuning Develop tanks tests and cleaning (water + chemicals) Automatic disposal of chemicals Gridding machine installation

Week 39 Sep Week 40 Oct. 2-6 Week 41 Oct Week 42 Oct Week 43 Oct Week 44 Oct Nov.5 Week 45 Nov G. Rosa L. Ioannucci V. Di Pinto C. Valieri P. Pecchi E. Buccheri E. Carrara A. Pelosi G.Capradossi G. Romano C. Sirignano M. Ieva A. Andriani M. Castagna E. Buccheri P. Sestito A. Pelosi G.Capradossi C. Sirignano D.Di Ferdinando R. Diotallevi P. Di Pinto V. Togo E. Carrara A. Schembri E. Buccheri G. Romano C. Sirignano P. Di Pinto C. Valieri P. Pecchi G. Rosa A.Pelosi G.Capradossi G. Rosa C. Sirignano D.Di Ferdinando L. Ioannucci V. Di Pinto R. Diotallevi E. Buccheri C. Sirignano A. Pastore M. Castagna C. Valieri A. Andriani P. Pecchi G. Rosa C. Sirignano G.Romano M.Ieva P. Di Pinto R. Diotallevi A.Andriani E. Buccheri G.Rosa Shifters Shifts

2 chains ready since November 3rd to be used in manual mode Chemical preparation - Manual Development - Manual Chemical disposal - Automatic First development done using the first chain (Oct 25 th) 1 chain commissioned November 2nd (10 bricks successfully developed)

Development quality 10 bricks from BAM (wrong piling or incorrect wrapping) (1 developed in CS facility as reference) OPERA like procedure (transportation, labeling) Standard develop procedure and solution refresh rate Emulsion quality monitoring (trasparency and fog count)

Film transparency is good and no degradation observed up to now (yellowing or abnormal thickness). Two more months at least are needed to be sure that films will not turn to yellow, anyway no dramatic effects detected Ref FD8.2 (0.5) 37.8 (2) 8.6 (0.4) 7.5 (0.5) 8.2 (0.2) 8.4 (0.4) 7.8 (0.3) 9.1 (0.5) 8.4 (0.5) 8.6 (0.5) Films having hole (first shipment)

Fresh water in DevStopClean Fix Wash1 Wash2 Glyc 30 l 45 l 750 l 500 l 250 l 300 l Transfer of chemicals from preparation tanks 250 l 750 l Waste 1 Waste 2 Waste 3 Wastewater Status

OPERA bricks development (Nov 2006) 14 bricks were developed using the standard procedure 9 bricks were used for cosmic test 5 bricks extracted from the detector We used for cosmic test some bricks that BAM tagged as “out of spec” because of wrong Z dimension; that means they had double lead layers or double emulsion layers. CS were developed in the underground facility and ECC films + VETO films added during the cosmic exposure were developed outside.

CS films measurements We carried on a single development for all CS films and related FD are the following: IDFD (g/(10  m) IDFD (g/(10  m) FD same as TTCS sample developed in August TTCS same sample ???

In order to study more in details fog-up problem on double refreshed films a new exposure at BTF (Frascati) is planned fro the next week and films will be developed at LNGS starting from Dec 20th.

ECC films measurements We carried on a single development for ECC and VETO films: IDFD (g/(10  m) IDFD (g/(10  m) VETO films FD is First shipment + hole

nd shipment 1 st shipment

Develop order Brick IdFD (g/(10  m) 3 Note New developer New fixer Cosmic test bricks

IDFD (g/(10  m) 3 Notes New dev & fix Extracted bricks