HADES collaboration meeting XXX, Lisbon, 7-10 October, 2015, ECAL modules assembly and monitoring system ...update since last meeting Ondřej Svoboda HADES collaboration meeting XXX, Lisbon, 7-10 October, 2015,
ECAL plan Objective: Having a running (part of) ECAL in HADES cave in the end of 2017 for SIS18 experiments R&D: Technical issues solved, TDR approved, development (almost) closed To be solved: - final PMT type : ~ 270 PMTs missing (from total 978+30) usage of 1.5” and 3”, or only 3”?? - funding: from FAIR in progress, FAIR-CZ in progress, other sources?? Work schedule: - adaption of module mechanics on the way (see further slides), but partially depend on the PMT type - support frame – see separate talk of Edward Lisowski - assembly and installation of modules – from 2016, depending on available space and delivery of the support frame
Dismantling of ECAL modules at GSI - done in GSI by technicians from INR Moscow (disassembling and cutting long cans) - 700 modules ready (plus ~200 with shorter length) - 260 modules shipped from CERN in spring 2015, will be processed in Nov. - Dez. 2015 End of 2015 – preparation finished, 100% of needed lead glass crystals and brass cans available.
Adaption of ECAL modules at Tuř (CZ) 550 modules moved from GSI to CPM company (Tuř, CZ) in 5/2015 (small company focused on precise mechanics and optics) 300+ modules ready, 100% by the end of October, than shipment back to GSI! Task on modules: cleaning, polishing lead glass where needed wrapping in Tyvek adapting mechanics to correct length preparation for optical fiber manufacture of new mechanics for 3“ PMT
Purchase of components in 2015 (by Řež) Optical Fibers 25 cm long to be build in modules 330+180 pieces (~6000€) Tyvek DuPont TYVEK 1060B 225 m2 (enough for all modules) HV boxes 10+25 pieces (enough for ECAL) adapted at Řež PE spacer 200+400 pieces adapted at Řež and Optical monitoring system, see next slide..
Optical monitoring system First prototype Second prototype 12/2012, 10 fibers old TOF fibers (rigid) blue LED 2012, 10 fibers fibers dedicated for blue light blue LED/laser LED One sector full system designed and manufactured at SQS vláknová optika, a.s., Nová Paka (CZ) blue laser LED, 80mW output power microlens array and optics 196 fibers for blue light ready in November 2015
Plans for near future November – December 2015 dismantling of the remaining 260 pieces from CERN by Russian technician at GSI December 2015 stay of technicians from Optical laboratories of Charles University in GSI, preparation of room for assembly, test of assembly during 2016 - tests of new optical monitoring system - adaption of HV boxes, PE spacers,... - mechanics for all modules - final assembly of modules for 1-2 sectors - installing modules in HADES cave (when support structure is ready)
Open questions – missing funding Funding of some components is not clear (= has to be clarified now or in near future)!! 270 PMT – mixture of 1.5“ and 3“, or 3“ only? HV system for 4 sectors monitoring system for 5 sectors Continuing in module assembly now might lead to spoil of money and work when changing the plans in future...