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JRA - 6 VPHGs and Related Subjects

JRA - 6 VPHGs and Related Subjects. Filippo Maria Zerbi… …on behalf of the JRA Team. Purpose of the JRA. Breakthrough developments in the area of Volume phase Holographic Gratings. Their use at IR wl (WP 1). 4. Their use at UV wl (WP 4). Their use in non-traditional

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JRA - 6 VPHGs and Related Subjects

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  1. JRA - 6 VPHGs and Related Subjects Filippo Maria Zerbi… …on behalf of the JRA Team

  2. Purpose of the JRA Breakthrough developments in the area of Volume phase Holographic Gratings Their use at IR wl (WP 1) 4 Their use at UV wl (WP 4) Their use in non-traditional Configurations (WP 2) Non traditional fabrication Tech-s (WP 3)

  3. Goals of the JRA WP 1 – Infrared VPHGs 60 months – Science Grade High perf.s Cryo protos 18 months – Lab Grade Cryo Protos WP 2 – Non Traditional Configurations 60 months – Science Grade first non-DCG proto 18 months – Lab Grade first non-DCG proto WP 3 – NonTraditional Fabrication Processes 60 months – Ready for application innovative config.s 18 months – Lab level innovative demonstrators WP 4 – UV VPHGs 60 months – Science Grade High perf.s UV dev.s 18 months – Lab grade UV dev.s DONE

  4. Highlights 1 First IR Lab Grating exists

  5. Highlight 2 First double-pass UV Cross Disperser exists …Omissis….. Reserved Information

  6. Highlight 3 The first VPHG-based TF exists

  7. Highlight 4 The First Polymer Grating Exists

  8. Question How could they achieve all their milestones and deliver all the deliverables IN SPITE of the delayed cash flow ? Didn’t we assign to these guys too much money then ? NO YOU DIDN’T !!

  9. Philosophy Adopted (Oil, Garlic and Paprika) No cryo-tests on IR devices available yet Omissis – Reserved Information TF realised with existing spare gratings TF tested with a modified commercial WebCam Reagents were on-stock or borrowed (…stolen) No Holography. direct replica of a Ronchi Grating Principles OK, Show Stopper none…. ……but Leftovers many

  10. Leftovers Full warm and some cryo characterization of IR devices Calibrated Source-Coll-Camera-Detector system on the Optical Table for TF Measure Efficiency of the Ronchi Replica Obtain the first “Holographic” Polymer Grating Assess the ghost problem theoretically and in existing protos ETC. ETC.

  11. Next Steps on the Roadmap 1 Toward a Science Grade IR grating • Cryo Tests outcome is crucial • How does the efficiency or the WF changes ? • Can we drive the changes by design ? Toward a UV Science Grade Cross-Disperser Trial and Error – Many VPHGs • Obtain a Complete Device and test it • Monitor materials and interfaces losses • Optimize the manufacturing process • Gelatine does NOT work well at blue UV • Alternatives ? Entirely new Issue

  12. Next Steps on the Roadmap 2 Toward a Science Grade non-traditional device (e.g. TF) • Specific VPH • Easy to handle Mechanical. Assembly • Astronomical useful “zoology” • Why not to use polymer gratings (Synergy) Toward a Science Grade Polymer-based VPHG • Polymer Optimization (again and again) • High Precision Deposition (INTERCAST) • Hologram versus Hologram Replica • Control over efficiency and wavefront

  13. New Issues The High Resolution Regime • Echelles ? • IR-High Res. (R=5000,20000) • Stacking and Packaging. Cryo Polymers • Polymer VPHGs are great in IR. Are they Cryo ? • Can we make a cryo family of them ? Blaze Extender Configurations • Explore ways to scan or cover the superbalze. Alternative to DCG in the UV

  14. 04 06 07 08 05 Plot of future activities Leftovers Roadmp Design and parts Assembling Testing New Issues

  15. A good dewar is 25 K€ A laser is 25 k€ 2 PM/yr + 1 board/yr + Some “Intertravel” An IR Laboratory detector is 25 K€ Etc. Etc. It is 24 trips/yr -- for 18 “key persons” 1g of polymer is 1 K [(J,H,K,UV1,UV2,UV3),4*TF]*2 = 32 unit -- 0.2 g/grating needed You need 5 g/test per specie Each costs 5-10 K€ depending on the type Let’s take an average (320+160)/2=240 Then substrate, then casting/coating, etc. Didn’t we assign too much money to these people ? The original working Hp 600 600 k€ Travel Cost 120 480 k€ “Traditional” Prototypes 240 240 k€ Polymer Devices 100 140 k€ Manuf./Test Infrastructures 140 0 k€ None of the “New Issues” is budgeted

  16. Conclusions • JRA activity is proceeding along the path and in schedule • Working princples are tested • Progressively higher quality products are delivered • Important synergies between partners have been created • Synergies with other JRAs are starting (via KTN) • New Ideas are coming up • Industry interest is kept and enhanced …..We would like to keep on going

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