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1 PFP Peer iCDR 2011 5/9-11 Particles and Fields Package (PFP) Peer Instrument Critical Design Review SWIA Mechanical Gregory Dalton Gregory Johnson UCB-SSL.

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Presentation on theme: "1 PFP Peer iCDR 2011 5/9-11 Particles and Fields Package (PFP) Peer Instrument Critical Design Review SWIA Mechanical Gregory Dalton Gregory Johnson UCB-SSL."— Presentation transcript:

1 1 PFP Peer iCDR 2011 5/9-11 Particles and Fields Package (PFP) Peer Instrument Critical Design Review SWIA Mechanical Gregory Dalton Gregory Johnson UCB-SSL

2 2 PFP Peer iCDR 2011 5/9-11 SWIA Mechanical Overview Assemblies and Features Materials Analyzer Construction Cover Release Mechanism Attenuator Construction MCP Construction MOBI Motor Assembly Purge Construction Electronics Board Stackup Electronics Box Construction Mounting and Interconnects Analysis Outstanding Issues, ETU testing

3 3 PFP Peer iCDR 2011 5/9-11 SWIA Status Drawings – 100% complete Fabrication – many parts complete, quotes out, parts in shop All PDR FRA’s addressed Testing – anode assembles, placed in calibration chamber

4 4 PFP Peer iCDR 2011 5/9-11 SWIA Assemblies and Features Analyzer Anode Electronics Attenuator/ Cover Release PFDPU/S-C Connectors Mounting Feet

5 5 PFP Peer iCDR 2011 5/9-11 SWIA Materials and Construction Standard UCB Construction: Machined/Etched Parts –6061-T6 Aluminum –2024-T8 Aluminum –544 Bronze –303 Stainless Steel –Delrin AF, PEEK 450G, Vespel SP-1/3 –BeCu springs Finshes –Alodine –Anodized –Gold Plating –Ebonol C, Black Chrome, DAG-213, Black Electroless Nickel with Teflon Thermal Treatments Blankets (LM supplied) Thermal Taping (LM supplied) Long lead Items MCP Carbon Foils/Carriers TiNi P5 Pin Pullers

6 6 PFP Peer iCDR 2011 5/9-11 SWIA Analyzer Construction Outer Grids Cover Release/ Attenuator Top Deflector Mount Top Deflector Spider Plate Hemisphere Mount Inner Hemisphere Outer Hemisphere Bottom Deflector Mount Bottom Deflector Aperture Ring Cover in Closed Position Attenuator (down)

7 7 PFP Peer iCDR 2011 5/9-11 Cover Release Mechanism Cover Closed Cover Open TiNi P5 Pin Puller Inner Slide Spring Plunger Burp Spring Retraction Spring Attenuator Latch Cover Seal Burp Spring: designed to relieve N2 at 5psi. Holds cover closed during vibration Safety Switch

8 8 PFP Peer iCDR 2011 5/9-11 Attenuator Cover Closed Cover Open, Attenuator Down Cover Open Switch Cover Open, Attenuator Up Cover Stroke: 0.220” Aperture stroke: 0.225”

9 9 PFP Peer iCDR 2011 5/9-11 Attenuator Attenuator Slide Assembly SMA Spring Block Switch Assembly Attenuator Down Attenuator Up Attenuator Design: 2.17 N per SMA wire, redundant wires in both directions 30g moving mass 0.51 N switch spring force in detent to actuate attenuator (to hold in 1G environment) 10x SMA force design margin 25% SMA wire over travel SMA Routing

10 10 PFP Peer iCDR 2011 5/9-11 SWIA MCP Construction Transition Plate MCP Spacers MCPs MCP Rings Spring Plates Spring Rings Grid Spacers MCP Grid Spring Clamps Anode MCP Supply Voltage Pin

11 11 PFP Peer iCDR 2011 5/9-11 SWIA Purge Construction 1/8” NPT Cole Palmer compression fitting and right angle purge block. N2N2 5psi N 2 purge pressure Viton O-Ring

12 12 PFP Peer iCDR 2011 5/9-11 SWIA Electronics Board Stackup LVPS Digital Deflector/ Sweep HV Supply Preamplifier/ MCP HV Supply Anode MCP Protective Cover Standoffs between boards and shields

13 13 PFP Peer iCDR 2011 5/9-11 SWIA Electronics Box Connections Boards rigidly mounted to this panel Digital pigtails to MDM on Preamplifier Preamplifier Hypertronics KA-17 to Anode Lower Deflector HV HV Enable on Pigtail LVPS to PFDPU Digital to PFDPU HV to Deflectors MCP HV Supply

14 14 PFP Peer iCDR 2011 5/9-11 SWIA Mounting, Harness, and Purge N 2 Purge Connection Harness Connectors

15 15 PFP Peer iCDR 2011 5/9-11 SWIA Frequency Analysis 243 Hz first mode of Upper Analyzer 14% mass participation

16 16 PFP Peer iCDR 2011 5/9-11 SWIA Stress Analysis 101G static loading

17 17 PFP Peer iCDR 2011 5/9-11 Cover Deflection and Load Burp Spring Plunger Cover Clamp Radially constrained, 0.010” gap

18 18 PFP Peer iCDR 2011 5/9-11 SWIA Mass Budget Electrostatic Analyzer Assembly0.624.759 Anode Assembly0.424.252 Electronics (Including Boards)0.628.789 Mechanical Misc. (Housing, Fasteners)0.343.663 CBE SWIA Instrument Mass2.0192.463 Allocation from MAVEN_PF_SYS_002K Resources2.6202.98 MARGIN30%20% CBE mass based on a combination of: Solid model with realistic mass properties Measured SWIA prototype board mass Measured mass of heritage parts and boards

19 19 PFP Peer iCDR 2011 5/9-11 Future Plan Attenuator Life Test – End of June Concurrent assembly of detector for Calibration Chamber Testing – End of June N2 Purge Test Exercise Manipulator Vibration test for final frame design and structural verification with electronic mass dummies – Mid July ETU Testing Beyond ETU Flight fabrication in August Black Nickel coating vendor Issues


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