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SXC on SXGSXC on SXG

Aim: Aim:

basic agreement about this SXC on SXG by the end of basic agreement about this SXC on SXG by the end of September (formalities may come later)September (formalities may come later)

Clarify key technological itemsClarify key technological items• Thermal environment (platform temperature, heating power mirror)Thermal environment (platform temperature, heating power mirror)• Mechanical interfaces to satellite (interface in mid-plane or at lower Mechanical interfaces to satellite (interface in mid-plane or at lower

plane)plane)• Electrical interfaces to the satellite (power switching, databus)Electrical interfaces to the satellite (power switching, databus)

Clarify key programmatic itemsClarify key programmatic items• Role of IKIRole of IKI• Top level schedule and deliveriesTop level schedule and deliveries• Project organization (PA/QA, documentation)Project organization (PA/QA, documentation)• FundingFunding• Next steps (and meetings)Next steps (and meetings)

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Status at SRONStatus at SRON

• Agreement with management to explore possibility for Agreement with management to explore possibility for participation in SXG at a fair level with major tasks:participation in SXG at a fair level with major tasks:• Overall coordinationOverall coordination• System engineeringSystem engineering• Interface with IKI/LAInterface with IKI/LA• Telescope assembly (using eROSITA mirrors)Telescope assembly (using eROSITA mirrors)

• Core team being formed, key people assigned: Core team being formed, key people assigned: • Luc Dubbeldam project leader Luc Dubbeldam project leader • Cor de Vries: instrument scientistCor de Vries: instrument scientist• Coen van Baren: lead mechanical engineerCoen van Baren: lead mechanical engineer• Frans Zwart: lead electronics engineerFrans Zwart: lead electronics engineer• Henri Aarts: system engineer/advisorHenri Aarts: system engineer/advisor• In addition scientist (Kaastra, in’t Zand) or detector In addition scientist (Kaastra, in’t Zand) or detector

specialists (Takei, Gottardi) will be involved as necessaryspecialists (Takei, Gottardi) will be involved as necessary

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ActivitiesActivities

• Update on system overviewUpdate on system overview

• Inventory of system engineering aspectsInventory of system engineering aspects• Preliminary concepts for telescope (tube, TAC)Preliminary concepts for telescope (tube, TAC)• Integration and test flowIntegration and test flow

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Overview: WBSOverview: WBS

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Block DiagramBlock Diagram

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BudgetsBudgets

UnitUnit Power MarchPower March Power JulyPower July Mass MarchMass March Mass July*)Mass July*)

Mirror assemblyMirror assembly < 90 (20% < 90 (20% margin)margin)

3232 (improved (improved modeling, 10% modeling, 10% margin)margin)

110-162110-162 139 (15139 (15% % marginmargin, , 60 kg 60 kg mirror)mirror)

DetectorDetector 5858 5858 3131 29 (29 (1010% margin)% margin)

CoolerCooler 580580 400400 (-60) (-60) 363 (20% 363 (20% margin)margin)

332 (332 (1010% % margin)margin)

Total ex system Total ex system marginmargin

728728 490490 504 - 556504 - 556 500500

System marginSystem margin 20%20% 55%% 20%20% 5%5%

totaltotal 946946 514514 656 - 656 - 723723 525525

*) excludes harness, radiators and support structure for electronic boxes

Radiator area needs to be specified (including electronic boxes?)

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OrganizationOrganization

• Steering group (den Herder, Mitsuda, McGammon, Kelley, Steering group (den Herder, Mitsuda, McGammon, Kelley, Predehl, Pavlinski)Predehl, Pavlinski)

• Science team (tbd, larger group)Science team (tbd, larger group)

• Project management (SRON: PI + project leader))Project management (SRON: PI + project leader))

• Work Package managers (system engineering SRON, detector Work Package managers (system engineering SRON, detector assembly (xx), mirror assembly (SRON), operations (xx)assembly (xx), mirror assembly (SRON), operations (xx)

• Interfaces with IKI: via SRON system teamInterfaces with IKI: via SRON system team

• Communication between partners within WP (direct, cc system Communication between partners within WP (direct, cc system team)team)

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Next stepsNext steps

• Update SRON-SRG-07-001 using outcome of the meetingUpdate SRON-SRG-07-001 using outcome of the meeting

• Agreement on baseline configurationAgreement on baseline configuration

• another meeting prior to IWG meeting in September to:another meeting prior to IWG meeting in September to:• Clarify level of commitment at IWGClarify level of commitment at IWG• Sign off deliverables (authorize SRON-SRG-07-001)Sign off deliverables (authorize SRON-SRG-07-001)• Agree on top level scheduleAgree on top level schedule• Clarify procedures for observing timeClarify procedures for observing time• Clarify steps for formal agreementClarify steps for formal agreement• ITARITAR