1. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 STATUS OF CURRENT DESIGN, DEVELOPMENT PLAN AND PHASE A SCHEDULE A. ARGAN 1, C. MACCULI 1, L. PIRO 1, M. BARBERA 1, M. DADINA 1, F. GATTI 2, S. LOTTI 1, L. VALENZIANO 1 1 INAF, 2 Univ. Genova

2. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015

3. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 CRYOAC: what we have done Progress on the CryoAC detector single pixel (max 4 TES): – Comprehension of the detector physics – TRL= 3-4 CryoAC multi-TES design and manufacturing: – Preliminary structural analysis by Comsol of the CryoAC Silicon structure – Realized the process to deposit on Silicon the Nb strip for TES biasing – Realized two Ir multi-TES pixels (65 TES per pixel), with and without Al-collectors, and Nb biasing – On production the Ir multi-TES pixel (96 per pixel), Al-collectors, anti-inductive Nb biasing, and bridge-suspended respect to silicon frame CryoAC design and mechanical I/F with the TES array: – Work started with the SRON team, shared ideas and preliminary size of the CryoAC active area (silicon absorber) which will contribute to the FPA design Electronics: – About the CFEE, WFEE and WBEE, all the electronics functions from warm to cold have been well framed by the italian teams; power, mass and volume budgets and have been detailed

4. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 What we have to do towards the TRL 5-6 by end 2018 Progress on the CryoAC detector single pixel: – Trade-off study among Tc, Base temperature, CryoAC performance (ETF, R) – P roduction of Proximized multi-TES Ir: Au to lower the Tc at design value – Consolidation of the multi-TES internal layout – TRL = 4 of the multi-TES pixel CryoAC manufacturing and test: – Define the mechanical I/F (size, anchoring location, materials) of the CryoAC – Conclusion of the structural analysis by Comsol of the CryoAC Silicon structure – Production and test (1 out of 4 pixel) of the CryoAC detector + vibrations – Test with the TES array inside the Cryostat Electronics: – Define the electrical I/F for the SQuIDs from the 50 mK stage to the 2K stage – Define the envelope to place the cold RF-filtering board at the 2K stage – Design, development and test of the CFEE (SQuID + filtering board) – Design and development of a WFEE representative bread-board (TBC) IT IS NECESSARY TO HAVE AN INTERNAL SCHEDULE BETWEEN INAF AND SRON DRIVEN BY CNES

5. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 Breadboarding philosophy vs DM Several BBs are foreseen to have a CryoAC DM integrated in the Cryostat at TRL 5-6 by end 2018 CryoAC detector single pixel: – On 2015 get the TRL 4, 3 samples, by testing new multi-TES samples, Al coll., Nb wiring CryoAC detector array: – BB0: preliminary prototype for mechanical-thermal qualification  metallic frame + micro- machined Si wafer for cryo test (stress, rupture, …), by Q2 2016 – BB1: STM (form-fitting) by Q4 2016. BB1 to be included (TBC) in the cryochain CTP activities – BB2: CryoAC detector with 1 out of 4 pixel active, mounted on the metallic frame, SQuID mounted and routed, vibrated, performance test by end 2017 in Italy (TRL 5) – If BB2 succesfull, delivery to SRON for integration CryoAC detector electronics: – By Q2 2015 we have to provide to VTT the SQuID specifications – BB1 CFEE (filtering board) tested on 2015-Q1 2016, mainly to verify at cryo the functions – Once from the cryostat team we have the allocated envelope and the SQuIDs have been procured, production of a BB2 CFEE form-fits by the Q4 2016 – BB of the WFEE by Q4 2016 (TBC)

6. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 The CryoAC Demonstration Model Ideas to be discussed with CNES/IRAP The DM is constituted by: – The CryoAC detector array (1 out of 4 pixel active) mounted on the metallic frame – The metallic frame has on board also the SQuID (1) routed from the TES-pad to the 2K – The acquisition system (including the TES/Squid biasing) is based on LAB equipment except for the WFEE (TBC) – The WBEE is not included in the DM From the programmatic point of view: – By end 2015 mechanical load specification – By Q2 2016 the I/F thermal/mechanical/electrical to develop the BB1 have to be provided to the italian team by CNES/SRON – BB2 delivery end 2017 for the FPA-DM AIT

7. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 7 -Performance simulations -Thermal modeling to derive temperature profiles on each filter -IR transmission and radiative power calculation onto the detector -Ray tracing (mesh imaging, filter tilt angles) -X-ray transmission -Material investigation -Supporting mesh for the outer and larger diameter filters (Si, Polyimide, Al, …) -Thin supporting foil (Polyimide, Si 3 N 4, ….) -Aluminum layer (oxidation, ) -Filter sample procurement -Polyimide/Al filter samples with Al lithographic mesh or meshless (LUXEL) -Si3N4/Al filter sample with Si lithographic mesh (provider still TBD) X-IFU Aperture Cylinder and FPA Filters On-going Activities

8. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 8 Main Activities Required Inputs -Performance simulations - Cryostat specs. (shield temperatures, cooling power, …), required EM attenuation in X-band. -Samples procurement -Preliminary tests (mechanical robustness, mesh trasparency, X-ray & IR transmission, EM shielding, Al oxidation, …) -Filters and frames preliminary design- Cryostat Thermal/Mech. I/F -Inspection, handling and storage procedures -Filters sample procurement -Test measurements- Vibrational and acoustic load -Environmental -Vis/IR transmission, XPS, AFM, … -X-ray transmission incl. Fine Abs. Struct. -DM filters and frame design -DM filters + back-up filters procurement -Optical Inspection -Shipment for integration in the DM -Test measurements on Back-up filters Technology Development DM Development (TBC) Q1-2015 Q4-2017 Q4-2015 Q4-2016 Q1-2017 Q1-2016

9. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 ICU: status Update on activities – Top level requirements revision from ICU prespective; – Budget (Mass, power, data rate) revision; – Basic architecture revision along with instrument configuration evolution. Open points – HK data rate budget – Model philosophy at instrument/subsystem level to be flown down to ICU level – Communication from top-level to unit-level to be improved: flow of information only on request.

10. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 ICU: Planning and development Planning for phase A – ICU requirements baseline (preliminary); – Development and verification plan first issue; – Preliminary architecture including IFs; – IPRR preparation (end 2017 - TBC) DM/breadboarding – No HW/SW breadboarding is foreseen Technology (HW/SW) is already at TRL >5 (heritage Gaia, Euclid, JWST); – Compression simulation on representative data

11. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 Background simulations: activities status L2 environment characterization – XMM-Newton: correlating satellite position to measured proton flux first rough estimate of the focused proton flux for ATHENA – Magnetotail GEOTAIL data analyzed Need to analyze further data (ARTEMIS, STEREO, WIND) to infer the proton flux dependence on time and spatial sector around L2 – SEP: Analyzing high energy (>100 MeV) data in L1 The preliminary magnetic diverter specs will be available by June 2015

12. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 Monte Carlo simulations Geant 4 – XMM-Newton: Studying electron production to optimize passive shield Performing simple tests to check software version dependence of the background – Ray-tracing: Measured eRosita mirrors reflectivity for soft protons Compared results with 2 different Monte Carlo codes Improving the simulator to better reproduce the experimental results The passive shielding specs will be available by June 2015

13. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 Schedule main assumptions - By Q4 2015 mechanical load specification for both CryoAC and Optical Filters - By Q4 2015 Cryostat specs for the Optical Filter design - By Q1 2016 aperture cylinder specs - By Q2 2015 provide to VTT the SQuID specifications - By Q1 2016 1 SQuID (+ spares) from VTT - By Q2 2016 Cryostat-CFEE mechanical I/Fs - By Q2 2016 the CryoAC-FPA thermal/mechanical/electrical I/Fs provided to the italian team by CNES/SRON

14. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 Activities planning CryoAC: - By Q4 2015 full testing and characterization of the multi-TES single-pixel prototypes to reach TRL 4 - By Q2 2016 BB0 for functional testing at cryo conditions - By Q4 2016 BB1 for ESA CTP Cryostat contract (TBC) - By Q4 2017 BB2 development, testing (including performance and vibration tests) and delivery for the DM integration CryoAC CFEE: - BB0_CFEE: By Q1 2016 prototype of the filter board for functional testing at cryo conditions - BB1_CFEE: by Q4 2016 VTT SQuID tested with the multi-TES single pixel + filter board form fitting - By Q4 2017 BB2 delivery for the DM integration CryoAC WFEE: - By Q4 2016 – Q1 2017 EQM development and testing Optical Filters: - By Q4 2015 full testing and characterization of the first samples procurement - By Q4 2016 full testing and environmental characterization of the second samples procurement - By Q4 2017 DM Optical Filters development, testing and delivery for the DM integration (TBC)

15. ATHENA : the Advanced Telescope for High ENergy Astrophysics ‹n.› ATHENA Italian Team, Consitium Board meeting, Genova, 4 March 2015 Schedule