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Overview of AMS-02 Changes due the addition of the Permanent Magnet

05/04/2010

Joseph Kastelic / ESCG

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AMS-02 Payload Design Changes due to the addition of the Permanent Magnet.

Major Cryogenic Hardware Removed from the AMS-02 Payload•Superconducting Cryomagnet •Superfluid Helium Tank (SFHe)

Cryogenic Support Hardware Removed from AMS-02 Payload• Onboard Vacuum Pump• Cryomagnet Support Straps (suspension system)• Flight Vacuum case• Cryocooler Loop Heat Pipe (LHP)• SFHe Tank Burst Disk• Vacuum Case Burst Disk• CAB Loop Heat Pipe, accumulators, evaporators• Warm Helium Tank and WHT MMOD.• 2500 liters of Liquid/Gas Helium

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Major Electrical Hardware removed from AMS-02 Payload• CAB (Cryomagnet Avionics Box)• Cryomagnet Dump Diodes (CDD)• Uninterruptible Power Supply (UPS)

Major Thermal Hardware Removed from the AMS-02 Payload •Zenith radiator•MLI (Reconfigured for new thermal requirements)

Electrical Support Hardware removed from AMS-02 Payload • Baroswitch Electronics (BSE) • RTD Cabling• Charge/Discharge Cabling• Cryomagnet Pilot Valve Switch (CPVS)(Magic Box) • OBP (Onboard Pump) Cabling from IPA• CCEB electronics (Leave Box On) • Components of the Tracker Alignment System

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Major Hardware Unaffected by the Change•USS-02 •PAS assembly (except envelope)•Grapple fixtures•Debris Shields•ROEU•EVA Connector Panel•Umbilical Mechanism Assembly

Major Hardware Added to Payload•STA Vacuum Case•Permanent Magnet (Inside the STA Vacuum Case)

•Permanent Magnet Support Structure (Inside the STA Vacuum Case)

•Tracker Plane 1N (above TRD)•Tracker Plane 6 added between RICH and ECAL•New TTCS loop for Plane 6

Hardware Reconfigured•Electronic Calorimeter (ECAL) moved 35mm•Tracker Plane 1N relocated above TRD.

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External Parts to be Removed From Payload

Zenith Radiator (Cryomagnet cooling)

Cryocooler

BSE (Baroswitch)

Vent Pump

Debris Shield, ROEU, and Interface Panel A removed for clarity

Cryomagnet Avionics Box (CAB) and CAB Loop Heat Pipe

Uninterruptable Power Supply (UPS)

Cryomagnet Dump Diode (CDD)

Cryomagnet Pilot Valve Switch Box (CPVS)

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External Parts to be Removed From Payload

Cryocooler

SFHe Tank Burst Disks

Vacuum Case Burst Disk

CryocoolerWarm Helium Tank and MMOD Shield

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Superconducting Cryomagnet and external Cryogenic Hardware.

Most will be removed from the AMS-02 Payload

4 Cryocooler Burst Disk Warm Helium Tank and MMOD Shielding

Various Tubes. Fittings, Valves, etc. to be removed.

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Cryomagnet Vacuum Case Internal Hardware that will be removed

Cryomagnet Helium tank

Sixteen Support straps (magnet suspension system)

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STA Vacuum Case to be Configured for Fight with permanent Magnet

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Permanent Magnet originally flow on STS-91 June1998

Mounts to structure with bolts and shear pins in 8 locations on the cylinder and 4 places on each flange

Top flange (structural)

Bottom Flange (structural)Magnet material core

(non-structural)

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STA Vacuum Case with Permanent Magnet

Conical flanges and Outer Cylinder not shown

VC Upper and Lower Support rings

Top View :Struts (exactly along Original Action Line)

Support Struts (16) (Titanium Alloy)Permanent Magnet

Aluminum X Structure 7075-T7351

11.03.2010 AMS02 Permanent Magnet

Outer Support Structure with 4 Identical Structures

STA Vacuum Case with Permanent Magnet

All Joints: Bolted and Shear Pin

Clevis and Spherical Bearing Joint

Titanium StrutVC attachment Fitting

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Vacuum Case with PM Cross Section

Permanent Magnet X-Structure

Upper Conical Flange

Lower Conical Flange

Permanent Magnet

Outer Cylinder

Upper Support Ring

Lower Support Ring

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Vacuum Case with PM Installed in the AMS-02 Unique Support Structure

STA Shown Installed in Pre-Integration Activities

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AMS-02 Tracker Assembly (Reconfigured)

Tracker Assembly Tracker Design Prior to PM

Tracker was Contained within the inner bore of the Vacuum Case

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Tracker Consist of 5 Planes of Carbon Fiber and 8 layers of Silicone

Plane 1: Layer 1

Plane 2: Layer 2 and 3

Plane 3: Layer 4 and 5

Plane 4: Layer 6 and 7

Plane 5: Layer 8

Original ConfigurationPlane 5 will be moved to the top of the TRD

Relocated Plane 5 or Plane 1N

New Tracker Plane 6 Layer 9

Tracker Plane P9 will be made from parts taken from layer 8, layer 1, and spares.

Electronic Calorimeter (ECAL)

Ring Image Cherenkov Counter (RICH)

Silicone Tracker

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AMS-02 Experiment Core and Tracker Assembly Reconfigured

Transition Radiation Detector (TRD)

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Plane 1N Configuration

TRD

Silicone layer

Carbon Fiber Plane 1N

Honeycomb Support Structure with CF face sheets

TRD

Plane 1N

Plane 1N will include MLI and debris containment.

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AMS-02: Upper TRD Cover with Plane1N Support

Plane1N Support Structure

TRD

Unique Support Structure (USS)

Permanent Magnet Assembly

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AMS-02: Upper TRD Cover with Plane1N Support

Plane1N Support Structure shown translucent

Plane 1N

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AMS-02: Upper TRD Cover with Plane1N Support

Plane1N Support

Plane1N

Silicon Layer

Honeycomb Support Structure with CF face sheets

Plane1N Support

PlatenNSilicon Layer

AMS-02: Upper TRD Cover with Plane1N Support

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New Tracker Plane 6 Layer 9

New Tracker Plane will be located between the ECAL and the RICH Assembly

The ECAL will be lowered by 35mm giving room for the new plane

Tracker Lower Time of Flight

Plane 6 will include MLI and debris containment.

The empty space from Plane 5 will be replaced with a dummy plane

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New Tracker Plane 6 Layer 9

Tracker Plane Mounting Hardware. Interfaces Existing ECAL Mounting Locations

ECAL

Silicone LayerCarbon Fiber Plane

Silicone Layer

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New Tracker Plane 6 Integrated

New Cooling Loop

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New Tracker Plane Cooling Loop

Loop for Plane 6 (Evaporator)

Tracker Plane Cooling Loop (TTCS)

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Capture Bar Clearance issue due to the lowering of the ECAL

Passive PAS

Capture Claw Clearance Envelope ISS Keep out zone

The Configuration prior to lowering the ECAL

AMS-02

Active Common Attach System (CAS)

Capture Claw

Lowering The ECAL 35mm produces a violation of the Capture Claw Envelope of 19mm

Nominal Clearance to Claw 24mm There is no known impact of the envelope violation that concerns AMS-02

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MLI

Considerable MLI changes are anticipated. Some will be eliminated and others will be added.

Starboard Side of Payload

RamWake

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Considerable MLI changes are anticipated. Some will be eliminated and others will be added.

MLI

Port Side of Payload

Ram Wake

USS-02 Assembly (Primary Structure)

Payload Attach System (PAS)

Umbilical Mechanism Assembly (UMA)

Power and Video Grapple Fixture (PVGF)

EVA Handrails

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AMS-02 Hardware that will not be changed

Port Debris Shield

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Flight Releasable Grapple Fixture (FRGF)

AMS-02 Hardware that will not be changed

EVA Connector Panel

Remotely Operated Electrical Umbilical (ROEU/PDA)

Starboard Debris Shield

Interface Panel A

Keel Assembly

Keel Handrails

USS Handrails

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Backup Slides

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Parts to be Removed From Payload

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