ATLAS Pixel Detector

BPSS and Service PanelsSanta Cruz, CA

E AnderssenLBNL

ATLAS Pixel DetectorService Structures and Beampipe

Support• Package design of Insertable Pixel System

– Pixel system is integrated into train of services– Service Supports and Beampipe supports integrated together in Forward

Region– Joined together to Form “PACKAGE”– Assembly of Package on surface is largely European responsibility

• Key Cost Points– Beampipe Supports are a new Pixel responsibility—not fully approved by

US Atlas, but fully accepted as absolutely required—NO WBS in Pixel estimate

– Only limited Service Panel Prototyping occurred in FY03—shift mockup/system testing to ‘04

– Design changes increased cost of service structures and integration responsibilities are increased(ing)

– UNCOSTED: Environmental cooling/sensors; 1/8-Barrel System test in ’04 (completely ignored this)

• Assumptions– MT Staffing for BP and Service Supports is Shared with PST, will ramp up

when Sectors finish– BP support budget will come from US Atlas—does not come from current

pixel budget

ATLAS Pixel DetectorPatch Panel 0

Service Panels

SCT Barrel

TRT Forward

Side C Side A

Service Panels Pixel Detector

TRT Forward

ATLAS Pixel Detector“Package”

Beam Pipe Support Stru

cture

Beam Pipe Support Stru

cture

Pixel Detecto

r

Not Shown

Beam Pipe

Service Panels

ATLAS Pixel DetectorService Panel with PP0 and PP1 Quarter panel

• Cooling connections

• Electrical Connections

• Opto cards, fibers and fiber connections

• Service Support along PST

• Regenerative Heat Exchanger integrated in service quarter panel (SQP)

• Supports PP1 during assembly

ATLAS Pixel Detector2 Hit Service Quarter Panel

• Inner Panel not installed, but need to know far enough in advance to ‘adjust’ lengths of B-Layer and Disk Type 0 Cables

• Service Quarter Panel Structure—Back Bone and Arms shown

Back Bone

Tube Support Arms

ATLAS Pixel DetectorPP0 2-Hit installed on BPSS

• Disk/B-Layer not assembled (Inner Panel)

• Support condition not changed—last armature supports end of Outer Panel

• Inner panel supported on tabs placed on BPSS Assembly

ATLAS Pixel DetectorBPSS Supports Service Panels

• Primary interface to BPSS is ‘Longeron’

• Adequate clearance for beampipe wire given by cooling tubes

• BPSS Adjustor fits through PP1 QP, which is integrated with SQP

• Interface blocks along longeron for SQP ribs Mate with Tube Support Arms

• Mount tabs on Barrel Cruciform support Inner service panel

ATLAS Pixel DetectorPP1 Part of SQP Assembly—tight interface with

BPSS• Routing of tubes

through PP1 set to minimize variety of tubes (same bend profile)

• Sets of Tubes shared per octant

• BPSS Adjustor, and support strut align with SQP during assembly

• Gap between tubes (anti-clocked with adjustors) allows for access to Opto connector(s)

• SQP Backbone not shown—sits in ‘rail cutout’

ATLAS Pixel DetectorPP0—Interface to Detector Services

• PP0 is detector end of SQP Assembly

• 2 hit system has ~6 less PP0 flexes per octant which is number of flexes on inner panel

• Inner panel carries Disk and B-layer services (nominally)

• Can be ‘de-scoped’ but requires decision deadline prior to fabrication of type 0 cables for disk and b-layer, or deciding now to fabricate these ‘long’

ATLAS Pixel DetectorService Panel Numerology

ATLAS Pixel DetectorCooling Tubes

• Heat Exchanger integrated into Service Panel

• Requires close-coupling of inlet and outlet (supply/exhaust) tubing within the panel

• Design and routing requires ~5 different bend profiles—these are combined in various ways to get all combinations of tubes

• Cost of Bending tubes in SQP assy estimate—tubing and fittings in cooling tube estimate

ATLAS Pixel DetectorHeat Exchanger Units (Type 1 Tubing run)

• Tube units are pre-assembled into Heat Exchangers

• Tube units are held in service panel support structure

• Blue unit is for Barrel• Red unit is for Disk• Units are loaded as

required by service modularity

ATLAS Pixel DetectorPPO Electrical/Structural Prototype

ATLAS Pixel DetectorBeampipe Support

Frame

Wires at Z=-848,+848

Fixed Adjustors(no spring)

Top and Side

Sprung AdjustorsSide and bottom(tension limiters)

Wire Adjustors

Cruciform supports

Longerons

Service panelAttachment points

ReinforcingLongerons, Attach Points to PP1

2 Frames – 1 A Side, 1 C SideSingle Frame Shown Here

4 Support Wires, 1 Support Plane

ATLAS Pixel DetectorBeam Pipe Collars

Split Conical Ring Allows Free Placement in Z

Wire Anchor Point

Kapton Heater

Aerogel Insulation

No longer delivered—saves ~$25k

ATLAS Pixel DetectorAdjustor/Tension Limiter

Preload Adjustor Barrel

Limiter Spring

Wire Adjustor Screw

Wire Adjustor Nut

WireCollet &

Nut

Wire

Tension LimiterPlunger

Wire Guide

ATLAS Pixel DetectorSchedule

• Delivery for Beampipe Support and Service panels follows roughly the delivery of the frame components– Delivery January ‘05

• Delivery of Beampipe supports may be requested earlier—need to define actual date in conjunction with Beampipe group

• PRR for BPSS complete in FY ’03, production design complete

• EDIA in ’04 is for fixture ‘adjustments’, mfg procedure definition, and production oversight.

• Service Panels may be required earlier subject to testing requirements as yet undefined

• Prototype Service panel(s) required for System Test in 2nd QTR FY03 Left in from last year—shifted to 2nd QTR ’04

• Service Panel PRR in Dec ‘03

ATLAS Pixel Detector

Costs for Service Panels/Supports

• ETC03 to ETC04 Increase of ~$84k

• Due to Schedule Delay and increased Complexity

• Production moved from FY03 to FY04—materials purchased ‘03

• Prototyping (mockup) still required, shifted to ’04, may still happen in ’03 (24k+15k)

• Labor is .8 FTE in ’04• Did not estimate

‘auxilliary cooling/env sensors/opto-cooling

ETC03 FY03 FY04 TotalPrototyping

Shop/Labor $8k $0k $8kMaterials $73k $0k $73k

ProductionShop/Labor $0k $138k $138kMaterials $43k $0k $43k

Totals $124k $138k $262k

ETC04 FY03 FY04 TotalPrototyping

Shop/Labor $8k $24k $32kMaterials $3k $15k $18k

ProductionShop/Labor $0k $188k $188kMaterials $0k $108k $108k

Totals $11k $335k $346k

ATLAS Pixel Detector

Costs for Beampipe Support

• Added responsibility to Pixel Project—budget to come from Lissaeur’s integration WBS

• Renamed ‘prototype’ to first production unit, built 1-d prototype for April FDR

• EDIA is less than initial Estimate

• No Foreseen cost impact to finalized design

• Production delayed, engineering accelerated—no cost increase, but shift of all production cost to ‘04

• Contingency would require Second ‘production’ structure to be fabricated

• Labor in ’04 is ~0.6FTE• Some of this cost

‘decrease’ is a shift of cost to ‘Insertion’

ETC03 FY03 FY04 TotalPrototyping

EDIA $93k $0k $93kShop/Labor $78k $0k $78kMaterials $10k $0k $10k

ProductionEDIA $0k $24k $24k

Shop/Labor $0k $67k $67kMaterials $0k $12k $12k

Totals $181k $103k $284k

ETC04 FY03 FY04 TotalPrototyping

EDIA $15k $0k $15kShop/Labor $15k $0k $15kMaterials $1k $0k $1k

ProductionEDIA $50k $18k $68k

Shop/Labor $0k $111k $111kMaterials $0k $25k $25k

Totals $81k $154k $235k

ATLAS Pixel DetectorManpower Needs over Mechanics ‘04

• Manpower Requirements over all of Mechanics– PST ~0.6FTE– Service Panels ~0.8FTE– BPSS ~0.6FTE– Insertion ~0.1FTE– Sectors assumed ‘half an FTE’ in ’04

• Manpower is ~2.6FTE• Seems that this is possible with manpower available,

but neglects inefficiency of task switching, PHASING• Also, assumes that all tasks completed in FY’04, some

can trickle into 1st QTR FY’05• Does not include Manpower for PP1, Frame Assy,

Installation/Dry fit