hcal installation and commissioning status pawel de barbaro

hcal installation and commissioning status pawel de barbaro, vitali smirnov, june 11, 2007 1

Positive news • HF+ was the first subsystem fully commissioned (end-to-end chain, from photo-multipliers, QIE cards, Optical Fibers between ux 5 and usc 55, Frontends, DAQ. • LED pulses timed in, both for local and global runs • Latency loss problem under investigation 2

hcal commissioning: schedule • HF Apr/May: completed work on HF+, HF- will be commissioned as soon as we get LV power! • HO June: YB-1, YB-2 in sx 5 hall July: HO on yb 0 wheel August: YB+2, YB+1 (waiting for water cooling) • HE June/July: start-up of YE+1 was delayed by lack of water cooling Nov/Dec: YE-1 (when it gets lowered) 3

Low Voltage issue we do not have power distribution of 220 V, 3 phase to AC/DC converters, we have to use temporary solutions (HF, HE, HB) 1. 2. 3. 4. HF+, HF-; racks on HF detector HE+/racks in towers of YE+/-1 disks), HB+/-, HO/yb 0 balcony racks (x 3 n 33, x 2 f 31) HO+/-2, HO+/-1: racks on towers on wheels • • • Control of LV (25 -pair cable) to same destinations 48 V service to AC/DC converters Rack S 4 A 2 for Mainframe to control LV not ready for installation 4

Water cooling • Water cooling system for HE+ undergoing pressure tests, hopefully to be turned on soon (week of June 11 -15) • However, for HO +2, HO+1 water will not available until plus side disks and wheels can be opened (expect in late july or august ? ) • Note, without water, we can only power up readout boxes for less than one hour at a time 5

EBHB services installation and commissioning of HB wedges • HB commissioning will be on the critical path • Present schedule calls for installation of all services and full commissioning of HB wedges at the rate of 4 wedges per 4 days, (two wedges per plus and minus half-barrels to be done in parallel) • LV and DCS cables, as well as N 2 inertion flexible tubes need to be installed to Readout Boxes from balcony racks • HV cables and Optical Fibers have to be installed beteen ux 5 and usc 55, approx. length ~100 m 6

Draft schedule for +z end, m. gastal 7

critical issue for HB commissioning • ECAL cable trays in 53 deg crack will fully block access to HV unit and water connections of HCAL Readout modules 8

PP 1 reduces access to HB RBX 9

implications • We need to be able to guarantee full functionality of each individual HB wedge before EB cable tray can be placed over it and EB services installation can start • We are considering a scenario in which HV and Optical Fibers would be installed between usc 55 and balcony on near side prior to the start of EBHB commissioning campaign in order to reduce time on critical path 10

other hcal issues • Location of N 2 gas inertion (to protect HPDs against Helium damage) manifolds still not defined • Location of splice box for HV cables in x 0 area still to be confirmed • We are in process of testing/repairing CCMs (Clock and Control Modules). Repairs expected to be finished by mid-july. • Pemanent (driven by pressurized air) Source Drivers not yet delivered to CERN 11