Download presentation
Presentation is loading. Please wait.
Published byTyler Short Modified over 11 years ago
1
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 Review of cable procurement and installation Davide Piccolo INFN Napoli
2
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 RPC cables status HV, LV, DCS, Tsensor cables: ready to be prepared with final connectors. All the material (cables + connectors) are at CPE factory in Milan waiting for cutting length. Cable preparation prescriptions fixed. Expected time to delivery complete cable is 3 weeks starting from the cutting length definition. On the sheld (20 cm) L EASY side L L1 L6 20 cm LV cable DCS6 cable T sensor cables
3
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 RPC singal cable status Cern launched an official tender end of 2004 five competitors: –NOVACAVI3,189 chf/mt –Tecnikabel 2,328 chf/mt –PLASTICAVI1,919 chf/mt –Nexans2,596 chf/mt –Intercond3,040 chf/mt Results of our time skew measurements (worst case): –NOVACAVI1.1 ns –TECHNIKABEL1.5 ns –PLASTICAVI2.1 ns Tests has been performed on two/three samples of 25 mt pieces long for each type Request was fixed in t 1ns/25 mt Work is in progress in order to choose the best solution
4
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 From: Antonio Ranieri, Flavio Loddo NOVACAVI 25 mt PLASTICAVI 23 mt TEKNICABEL 25 mt
5
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 Cable cutting length Cutting length divided into 3 pieces: radial length periphery length inside rack length Radial layout The radial part has 4 symmetries form the routing point of view ZpL, ZpR, ZmL, ZmR; ZpL e ZpR READY (sect 10, 11) Symmetry broken for MB4: every MB4 has his own symmetry 30 % of the MB4 symmetries READY inside Rack length near te end We are waiting for the periphery length in order to cut the cables for the first 2 sectors
6
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 Cabling at LB side Rack plant front back Cable entrance Air flow 175 215 backplane LB crate Option 1: LB crate mounted on the front side (backplane at 175 mm from front) Option 2: LB crate mounted on the back side (backplane at 600 mm from the front)
7
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 LB crate position Option 1: crate on the front side very difficult to cable and big amount of cables on the path of the air flow Option 2: crate on the back side more easy to cable no cables on the path of the air flow, But front side of the LB crate at a distance of 600 mm from front side, we have to close the front for air flow problem and create a path for front cables, we have to modify the crates to move backward the backplane (is not an issue) Front of LB crate
8
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 Fixation tool
9
Davide Piccolo INFN Napoli Electronics Review 12-05-2005 Conclusions HV-LV-DCS-Tsens cables almost all material is ready. We are waiting for cutting length SGN cable: work on progress for the tender. Connector choosen (BERG or ODU connector). A preproduction of cable preparation for the barrel (157 cables for sector test) will be done at CPE Cable fixation tool/LB crate : invetigating several solutions. We have drawings. Some proptotype will be prepared in Napoli and we will decide the best solution after tests on complete crate inside the rack.
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.