Presentation on theme: "03 Dec 2002CMS Week - Bonding WGSalvatore Costa - Catania Status Report on Bonding at Catania Salvatore Costa University and INFN – Catania."— Presentation transcript:
03 Dec 2002CMS Week - Bonding WGSalvatore Costa - Catania Status Report on Bonding at Catania Salvatore Costa University and INFN – Catania
03 Dec 2002CMS Week - Bonding WG2 Salvatore Costa - Catania Real Module Bonding The first real module bonded in Catania was bonded early August 2002, just before our clean room was shut down for transfer to new Department Building. It is a TIB module with two 512-strip old CSEM sensors. Loop height of 150 ( m or.1 mil ?) was used (too low for current thinking).
03 Dec 2002CMS Week - Bonding WG3 Salvatore Costa - Catania Test of Real Module Bonded Could not read module in Catania. Being the CMS-like system setup in Catania also relatively recent, we weren’t sure whether problem had been introduced by Bonding or was in Test system. Brought Module to Florence were a test setup was in operation. Enrico Scarlini (who our technician Nunzio Giudice learns from, besides learning from Paolo Tempesta) judged all readout bonds good and correctly done (although with insufficient loop height for the current prescription), and all bias bonds also correct except for one from the bias ring to a HV capacitor pad. The bad bias bond had to be redone and after redoing the Module was successfully read in Florence.
03 Dec 2002CMS Week - Bonding WG4 Salvatore Costa - Catania The Bad Bias Bonds
03 Dec 2002CMS Week - Bonding WG5 Salvatore Costa - Catania Explanation from our Florence colleagues… Due to insufficient loop height, a likely flexing of the Module may have caused the bond wire to touch the p + -implanted line, which thus went to same voltage as the back of the Si, i.e. HV. This effectively shorted ground and back together. So, as soon as powered, Module drew maximum current. High current burnt tiny contact surface between wire and silicon and spawned oxide formation on the bond foot. This prevented further correct biasing of the Module even though after moving the Module around, wire would no longer touch p + -implanted line.
03 Dec 2002CMS Week - Bonding WG6 Salvatore Costa - Catania Test Results before Bonding Noise (by ARC)Calibration (by ARC)
03 Dec 2002CMS Week - Bonding WG7 Salvatore Costa - Catania Test Results after Bonding (by CMS-like)
03 Dec 2002CMS Week - Bonding WG8 Salvatore Costa - Catania Cold Boxes Catania is in fact producing Cold Boxes for all INFN bonding Centers Boxes produced and distributed: 4 (at Catania, Bari, Firenze, Pisa) Boxes under construction: 2 (for Padova and Torino)
03 Dec 2002CMS Week - Bonding WG9 Salvatore Costa - Catania Test Systems CMS-like is fully operational, as has been for a while already ARC installed but Struggled for some time to make it work until a hardware problem was found in a card Problem repaired, ARC has been tested to the extent that this is possible without connecting it to anything internally working Next week I will organize a real Module readout with ARC
03 Dec 2002CMS Week - Bonding WGSalvatore Costa - Catania …break…
03 Dec 2002CMS Week - Bonding WGSalvatore Costa - Catania DataBase Interface Update Salvatore Costa University and INFN – Catania
03 Dec 2002CMS Week - Bonding WG12 Salvatore Costa - Catania Interface Dev Status Little progress since last Mtg, Oct 22, due to teaching duties Will resume working on it from Dec 10 and still hope to deliver full, talking to TrackerDB, v. 1.0 around Christmas A.Profeti has started inserting from Pisa Pull Test data even as v.0.2 does not yet transmit such data to TrackerDB. I’ve begun saving and regualarly backing up evry night inserted data for later shipping to TrackerDB Played with Relay Appl to query TrackerDB from within my Perl scripts and it woks indeed Got some suggestions on rearrangement of present variables among Tables Still waiting for written description of some more useful variables to add
03 Dec 2002CMS Week - Bonding WG13 Salvatore Costa - Catania Center “DB Readiness” CenterDB ResponsibleForm Defaults AachenWolfgang BraunschweigMISSING BariValeria RadicciOK CataniaSalvatore CostaOK CERNAlan HonmaOK FNALBill KahlOK FirenzeSimone PaolettiOK KarlsruheHans-Jürgen SimonisOK PadovaMaurizio LoretiIN PROGRESS PisaAndrey StarodoumovIN PROGRESS Santa BarbaraBill KahlOK StrasbourgPierre JuillotOK TorinoErnesto MiglioreOK ViennaThomas BergauerOK ZurigoKlaus FreudenreichOK