1. iALMA WP4 – ALMA band 2 passive components
Science and Technology in Italy for the upgraded ALMA Observatory
WP4 – ALMA band 2 passive components
Renzo Nesti

2. Outline WP4: Summary WP4: Development WP4: Risks WP4: Devices
WP4: Done some preliminary work
WP4: Band 2 or Band 2+3 ?
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

3. WP4 Summary Development of new technology and instrumentation for ALMA
Aimed to develop a prototype band 2 cartridge for ALMA
Design prototyping and test of band 2 passive front-end: Refocusing Mirror System (MIRRORS) Corrugated feed horn (Feed) Orthomode transducer (OMT)
Band 2 Vs Band 2/3 from the passive front-end point of view
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

4. WP4 Summary External Links Management Science Receiver Laboratory
Green E
Outreach
WP4
Band 2 Passive Components
WP5
Band 2 Cartridge Prototyping
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

5. WP4 Development First year activity 2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

6. WP4 Development First year budget (€) TOTAL FOE 7% COFIN Staff 58ˈ333
Instrumentation, Facilities, Software
425ˈ500
400ˈ000
25ˈ500
General Purpose
50ˈ000
Stages, Meetings
10ˈ000
543ˈ833
460ˈ000
83ˈ833
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

7. Activity in subsequent years
WP4 Development
Activity in subsequent years
2nd year activity Engineering of FEED, OMT and MIRRORS Fabrication of FEED, OMT and MIRRORS Set up facilities and environments for measurements Software development for data acquisition and processing Electromagnetic test on FEED, OMT and MIRRORS
3rd , 4th year activity Test analysis and critical design review Test report and WP4 documentation production Support to WP5 activity (cartridge system)
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

8. WP4 Risks To be completed……. 2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

9. WP4 Devices Mirrors or lens ? 2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

10. WP4 Devices Mirrors Cold or Warm Optics ? 2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

11. WP4 Devices Feeds 2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

12. WP4 Devices Feeds Array of 7 elements at Q band High reproducibility
High software accuracy
About 20 microns tolerances
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

13. WP4 Devices OMT CW_y CW_y CW_x CW_x X Y 2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

14. WP4 Devices OMT CNC machining prototype Q-Band High reproducibility
High software accuracy
About 20 microns tolerances
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

15. WP4 Devices OMT Measurements 2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

16. WP4 Band 2 or band 2+3 ? Band 2 to Band 2+3 extension:
Problems from passive front-end point of view. Solved
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

17. WP4 Done some preliminary work
ALMA Band 2+3: Electroformation hypothesis
Copper elettroformation Hypothesis
About π x 20 x 20 x 40 mm3 volume
About 30 g weight
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

18. WP4 Done some preliminary work
ALMA Band 2+3: Lathe hypothesis
44 aluminum lathe machined plates
About π x 36 x 36 x 60 mm3 volume
About 90 g weight
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

19. WP4 Done some preliminary work
ALMA Band 2: CNC milling hypothesis
8 aluminum equal-thick layers sandwiched by two plates
About 43 x 43 x 30 mm3 volume
About 100 g weight
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory

20. WP4 Done some preliminary work
ALMA Band 2/3: CNC milling hypothesis
11 aluminum not equal-thick layers sandwiched by two plates (8 AND equal-thick)
Minimum milling tool diameter of 0.5 mm (1 mm)
About 46 x 46 x 38 mm3 volume (43 x 43 x 30)
About 150 g weight (100 g)
(vs Band 2 OMT features)
2014 Mar 26 - Firenze
iALMA-Science and Technology in Italy for the upgraded ALMA Observatory