Integration GlueX Detector Integration Mission: To ensure systems meet or exceed physics driven goals To ensure that detectors are designed in a sensible way To ensure they fit together when assembled and function as intended Collaboration Meeting December 2003 Eric Scott

Prior conceptual goals Access to any detector package in one shift period Access to detector package without removing cables Signal cables as short as possible Fiber to control room –Limits ground loops

Considerations from BABAR Inter-system clearance of 20 mm –Possible exceptions: parts close to solenoid or mechanically fastened to neighbors… Good Neighbor Policy –“No system may pass its problems to its neighbor without the neighbor’s agreement.” –Such as: Thermal issues – heat put into the solenoid must be removed. Common Services –Insertion Fixtures –Air Conditioning, heating, ventilation ?

Survey Thoughts Design detector packages with known external reference points. Establish reference convention: –Center of target Z=0 for experiment? –Offset from inside or outside upstream iron A realistic “human” reference

Integration Packages Solenoid & Barrel Tracking Cerenkov TOF FCAL US PackageDS PackageFixed Package Package Access Area

Living with our Solenoid… “Fixed Package” Fill the central gaps –Barrel Calorimeter covers them anyway –Reduces fringe field What other steel modifications are desirable / necessary? –US end Fringe Field Suppression possibilities…

Standard solenoid Clipped 150 gauss Upstream end Solenoid face is at 0 Front gap is open 4 inches, all others are filled Closed Solenoid

Standard solenoid Clipped 150 gauss Upstream end Solenoid face is at 0 Both ends opened the same amount. All gaps are filled Standard Solenoid

Solenoid with Plate Standard with 20” X 80” diameter plate located 4” US with a 12” diameter beam hole. Clipped 150 gauss Upstream end Solenoid face is at 0 Both ends opened the same amount. All gaps are filled

Solenoid Plug Standard with 20” X 80” diameter Plug ~4” gap with a 12” diameter beam hole. Clipped at 150 gauss Upstream end Solenoid face is at 0 Both ends opened the same amount. All gaps are filled

Inside the Barrel “US Package” CDC –Part of US package? –Cables out US end Planar Drift Modules –Part of US package / independent? –Cables out US or DS end DS cable exit – impact on acceptance? US volume Tracking

Possible interference point for DS cable path driven by Cerenkov design and physics acceptance issues…

DS of Solenoid “DS Package” TOF & LGD –Package slides DS –Appliance concept Power & Cooling in Data out (Fiber?) Cerenkov –Could integrate with TOF & LGD package –Sets the elevation in the hall, should it still? Cerenkov TOF FCAL

Avoiding the millimeter war… Unified CAD database: JLAB – Unigraphics? Central repository Maintainer –One contact person –One location –Current source tree available to all Establish detector volumes for package groups Procedure for when conflict arises… Correlated with simulation geometry?

One stop Engineering support? Who provides the service? What are they providing –A check on safety critical points –Design assistance –Full design service When do we have to have this person / group in place?

Key near-term issues… Magnet iron / Fringe field reduction (Shielding) Experiment / Hall elevation (Cerenkov – other PID tech.) Rack locations: US front, side, access while beam is on… Cable / Optical space & paths –All out front / some out front for inner sled –If some come out the back, acceptance issues? Detector interconnects (supports): –Designs must be finished by:______ Power / Cooling needs and method –Inside magnet (CLEO’s PF-200IG based hydrocarbon coolant farm) –Outside AC, chilled water… Fire detection / Suppression –Inside magnet gas system? (FM 200 – heptafluoropropane?) –Outside dry pipe, power interrupt on alarm –Fire-wire, air sampling – sniffers…