1 / 10

Vacuum Deposition Thin Film Coatings Facility at Lab 7

Vacuum Deposition Thin Film Coatings Facility at Lab 7. Eileen Hahn. Services Offered. Optical fiber and connector polishing Fiber splicing Evaporated and sputtered coatings, especially fiber mirroring Cleaning and bake-out for UHV parts

kalil
Download Presentation

Vacuum Deposition Thin Film Coatings Facility at Lab 7

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Vacuum Deposition Thin Film Coatings Facility at Lab 7 Eileen Hahn Particle Physics Division Technical Centers

  2. Services Offered • Optical fiber and connector polishing • Fiber splicing • Evaporated and sputtered coatings, especially fiber mirroring • Cleaning and bake-out for UHV parts • High temperature vacuum furnace (1200 C) -hydrogen degassing of SRF cavities • RGA and out-gassing studies • Plasma etching Particle Physics Division Technical Centers

  3. High Output Production History of Optical Fiber Polishing & Mirroring • CDF Plug and Muon Tracker • CMS HCAL • CREAM • D0 Central Fiber Tracker, VLPC Production, ICD, Forward Pre-Shower & Forward Proton Detectors • NASA-GLAST • PHENIX • STAR-EMC Fiber barrel & End cap • Polished >1,000,000 fibers • Mirrored >500,000 fibers Particle Physics Division Technical Centers

  4. Polish and Mirror Processing of Optic Fibers • “Ice Polishing” • Quality Control • Preparation for Mirroring • Sputter Deposition in Vacuum • Optional UV epoxy coating of mirrored ends • Transport Packaging Particle Physics Division Technical Centers

  5. “Ice Polishing” of Optical Fibers • 2 programmable diamond polishers built at Fermilab specially engineered to reduce/eliminate vibration • Frozen water clamps fibers eliminating chatter and lubricates allowing for high rpm and slow feed recipe for high quality polish • Fabricate special hex fixtures to hold fiber bundles normal to cut • Individual Fibers ranging from 0.35mm to 2mm diameters • Round and square cross section fibers • Setup for fiber lengths from 5cm to 10m • Rate of production is dependent on diameter Particle Physics Division Technical Centers

  6. Quality Controls • Daily testing procedure of polishing results • Attention to machine maintenance • Log keeping • Visual inspection of fiber polish under magnification • Monitoring of sputter process, tracking identification and visual inspection • Reflectivity testing has been handled by the experimenters –Reflectivity rates have ranged from 80% to 90% consistently Particle Physics Division Technical Centers

  7. Prep for Mirroring of Optical Fiber ends • Amber room lights for light sensitive fibers (such as 3HF) • Experienced handling and cleaning of delicate fibers • All fibers handled with CR100 rated gloves Particle Physics Division Technical Centers

  8. Sputter Deposition System for Aluminizing fiber ends Particle Physics Division Technical Centers

  9. Fiber Mirroring Sputter Process • 2 vacuum systems specifically built and dedicated to optical fiber sputtering • Varying diameters & lengths can be mirrored - systems were designed to accommodate production lengths of 2.5 meters. Auxiliary extension will handle 3.5 meter long fibers • Sputter load dependent on diameter - typically 500 to 2000 fibers per pump down per unit • 99.999% chemically pure aluminum target • Very pure argon gas “Sputtering Grade” used • 3000 Angstrom thick coating monitored with oscillating quartz crystal sensor • Magnetron sputtering gun driven by DC power supply Particle Physics Division Technical Centers

  10. Summary • We have been providing this service over the last 15 years • Supporting • FNAL experiments • University R&D • DOE and International Facilities • On time and on budget!! Particle Physics Division Technical Centers

More Related