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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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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
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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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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