aspera-3 july 31, 01 monthly status report aspera monthly status reportmonthly 7_31/ page 1 monthly...

ASPERA-3

July 31, 01

Monthly Status Report

ASPERA Monthly Status Report Monthly 7_31/

Monthly Status ReportReport due 7/25/01

Schedule statused TBD

ASPERA-3

July 31, 01



Project Status Summary

Technical

May Jun July

Detailed Description: (for items identified as yellow or red)

Programmatic

May Jun July

Schedule

May Jun July

Resources

May Jun July

•The unit returned to SwRI as reported last month was the flight spare housing and HVPS with the flight model amplifier board and MCP. After much trouble shooting and a handful of changes to the amplifier board components, the sensor is now behaving to spec. Count rates are what they should be and the output data looks very good. Remaining actions are to swap flight amplifier board into the flight housing, re-qualify and calibrate the flight assembly, and fix flight spare. Bottom line culprit was that the amplifier threshold was set a factor of ~10 too low based on now suspect data from MCP manufacturer.

•Latest project photos and videos are available on Aspera-3 web site.

ASPERA-3

July 31, 01



Problem and Concern Summary

P=Problem C=Concern R=Resolved

Description Item Month ID'D Apr May Jun JulyFunding for ELS board fix Mar C C RLow count rate in ELS Jun C C

ASPERA-3

July 31, 01



Accomplishments of the Last Month -ELS

•Installed flight spare into characterization chamber sans housing for filament count rate test to try to reproduce problem at MSSL. Were able to reproduce the “saturation” problem. This eliminated the deflection system as the problem.

•We then continued trouble shooting ultimately leading to lowering the threshold of the amplifiers (2 resistors) to just above where they started to pick up noise on the bench. Based on the MCP data, this was well below the “valley” of the PHD.

•Repeated filament test. Count rate now at spec.

•Repeated characterization runs. Curves look very good.

•Repeated Ni63 runs that we were previously not able to do prior to board fix. (At that time, we blamed the poor results on the source as it was new and not proven). The data with the Ni63 now also looks very good.

ASPERA-3

July 31, 01



Accomplishments of the Last Month - IMA

• No activities over the last month.

ASPERA-3

July 31, 01



Accomplishments of the Last Month - Data Reduction Software

• Began Updates to APAF Project Data Management Plan (PDMP) for Version 1.2

• Began Updates to APAF Data System Interface Document (DSID) for Version 1.1

• Continued ELS IDFS Design– Began with Lab Data Review

• Continued Providing Technical Assistance for EPO Web Information

• Held monthly ASPERA-3 Software Status Meeting (July 31, 2001)

ASPERA-3

July 31, 01



Planned Activities for the Next Month - ELS

• Get flight unit back from MSSL.

• Swap the amplifier boards from flight spare to flight unit (i.e. put flight unit board back into the flight unit housing).

• Make mods to flight spare amplifier board and reassemble flight spare.

• Re-qualify flight unit (random vibe, TVAC tbd).

• Re-perform characterization runs on the flight unit.

ASPERA-3

July 31, 01



Planned Activities for the Next Month - IMA

• Support IRF in the assembly and test of the IMA flight model via telcon as needed.

ASPERA-3

July 31, 01



Planned Activities for the Next Month - Data Reduction Software

Tasks

•Continue Updates to APAF PDMP for Version 1.2

•Continue Updates to APAF DSID for Version 1.1

•Continue Dialog with Staff of PDS PPI Node and ESTEC Staff for Updates to the APAF PDMP and DSID

•Continue ELS IDFS Design Using Lab Data

•Continue Packet Definitions for NPI and IMA

•Continue Providing Technical Assistance for EPO Web Information

•Continue Defining and Implementing IDFS Web Tools

ASPERA-3

July 31, 01



Problem and Concern Status

Low count rate in ELS: We now think that we have the problem solved. The flight spare unit with the flight amplifier board and MCP performed very well during all of the “after fix” characterization runs. It is a fairly simple matter to make the amp board swap and then to re-run the characterization runs.

Bottom line culprit was basing our amplifier threshold on data from the manufacturer. Lesson learned is to have variable threshold in the instrument that can be commanded external to the sensor. This would have allowed us to tailor the threshold as needed by command.

We are currently negotiating with IRF over re-qualification requirements and re-delivery schedule to MSSL for calibration.

ASPERA-3

July 31, 01



Schedule Summary

ELS: ELS was delivered to MSSL / IRF on May 15. Problems surfaced during calibration and are still being worked. IRF is very aware of our activities and schedule. We are currently negotiating with both IRF and MSSL for upcoming schedule.

Software: Software activities continue to be on schedule.

• The full-up schedule is available on the ASPERA-3 Web site.

ASPERA-3

July 31, 01



ASPERA-3 PHASE B/C/D MASTER SCHEDULEJ J A S O N D2003

J J A S O N D J F M A M2002



J J A S O N D J F M A M

MAJOR MILESTONES / REVIEWS

Southwest Research Institute Approval: John Scherrer, Project Mgr.

Orig Approval: 6/25/99 Last Change: 12/15/00

MA1999

INSTRUMENT DEVELOPMENTELS

ESA MEXLAUNCH

- Electron Spectrometer Imager

MCPs Avail

ELSPDR

Denotes a Change/Slip

MechanicalDesignDetail DesignMechanical FabricationMicrochannel Plates (MCP’s)

MCP ProcurementMCP Characterization

Structural Thermal Model (STM) FabricationSTM Test & Delivery

IRF ELS & IMADelivery to ESA

CDRKEY

MAJOR MILESTONE

SCHEDULED START

SCHEDULED COMPLETION

EARLY START/COMPLETIONLATE START/COMPLETION

RESERVES

CRITICAL PATH

SUMMARY

STM

STM DeliveryElectrical

HVPS DesignHVPS LayoutHVPS FabricationHVPS Testing

HV Power Supply (HVPS)

Anode Board Design ModificationsAnode PWA LayoutAnode FabricationAnode Testing

Anode Assemby

Sensor Integration & TestSensor AssemblySensor Bench TestSensor Testing & Characterization (@ SwRI)

ELS FM/Flt. SpareDelivery to IRF

ELS Calibration (@ IRF) & Delivery to ESA

IMA- Ion Mass Analyzer ImagerIMAPDR

Prototype Development

IMA Definition

CDR

ELS FM/FSDeliv

Prototype DesignPrototype LayoutPrototype Fabrication & Testing

Flt. Model / Flt. Spare DevelopmentFM/FS Design ModificationFM/FS LayoutFM/FS Fabrication & AssemblyMCP Need Date MCP’s

Req’dIMA FM/FS Deliveryto ASPERA / ESA

IMA FM/FSDelivery

FM Sensor Characterization (@ SwRI)IMA Calibration (@ IRF) & Delivery to ESA

Processing SoftwareSoftware Concept & RequirementsVirtual Instrument DesignVirtual Instrument S/W CodingVirtual Instrument S/W TestingS/W Integration w/Sensor Calibration

SwRI IMA &ELS Deliv

to IRF

Instrument SupportEngineering SupportScience Planning & SupportSoftware Development & Support

IMA FM/FS I&T

FP

F

FP

P

P

FP

FP

FSP

FSP

FP

FP

FP

P

F

F

P PROTOTYPE

F FLIGHT

P

Deliver IMA Prototype

F

ASPERAICDR

ASPERAPDR

ELS FM/FS Deliveryto ASPERA / ESA

IMA FM/Flt. SpareDelivery to IRF less MCP’s

9/30/07

P

P

F

MCP’s Returned to IRF for Rework

R

R

R

Rework

Redelivery

4/10/01 D - ELS Anode PWA Rework, FU ReTest/ReQual Work

R REWORK

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