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Company profile & Space Science Detector Capabilities

Photek is a specialist manufacturer of vacuum-based detectors and camera systems for photon detection. With a wide range of detector products including image intensifiers, PMTs, streak tubes, and camera systems, Photek serves various applications such as space science, astronomy, and industrial processing. The company boasts state-of-the-art facilities, rigorous quality control measures, and exceptional technical support for its products. Additionally, Photek's expertise extends to space science projects, collaborating on missions like ACE, XMM, and GUVI to advance research in cosmic ray detection and ultraviolet imaging. Join us for unparalleled vacuum detector capabilities.

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Company profile & Space Science Detector Capabilities

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  1. Company profile & Space Science Detector Capabilities - Ian Cox

  2. Company Profile • Specialist manufacturers of vacuum based detectors and camera systems for photon detection. Photek manufacture Image Intensifiers, PMT’s, Streak Tubes, open faced detectors and a range of associated electronics and camera systems • Located in St Leonards-on-Sea – South East England • Established September 1991

  3. Company Profile • 36 Employees • 10 sales/administrative • 7 R&D • 19 production/test • 5 employees educated to PHD level • Further 8 employees educated to degree level

  4. Detector Products • MCP image intensifier • Ultra fast MCP photomultipliers • Streak tubes • Magnetic focus image intensifiers • De-magnifying gen 1 image intensifiers • Vacuum compatible detectors

  5. Camera Products • Photon counting • Nanosecond ICCD • Intensified CCD • Fluorescence • X-ray • Particle imaging

  6. Electronic Products • HT power supplies • Nanosecond gating control • Laser pulse generator • Preamplifier • Image intensifier cooling

  7. Applications • Early warning Missile systems • Wafer silicon inspection • Astronomy including orbital space science experiments • Ultra-high speed cameras • Nuclear & high energy physics research • Life-science research • Industrial processing • Security

  8. Facilities • 1,500m2 factory space • Class 100 assembly area • Class 10,000 clean room • Electro-mechanical vibration table • Ultra-high vacuum processing equipment • High speed (50 ps) laser pulsing equipment • Wet and dry hydrogen stoving capability • Inventor 3-D CAD software

  9. Facilities – Continued • Protel Electronic Design Software • Agilent 18 GHz sampling scope • LeCroy 5 GHz digital scope • Spectrometer • Photometer • Optical table and dark room facilities • Environmental test chamber • Phosphor screen production and inspection facilities • Optical coating plant

  10. Quality • Photek operates a company wide quality system based on ISO9000 and TQM principles • Currently working towards ISO9000 accreditation with successful implementation expected in 2008 • We operate a strict stock control and inspection policy with all items batch controlled and tracked • All detectors and systems are fully characterised in out photometry laboratory • Each device has a serial number that is used throughout the entire manufacturing process

  11. Test and Support • Excellent support and test facilities • Rigorous testing of all products is completed before release • Support question always answered by a technical member of staff. Typically educated to PHD level • 12 month warranty on all products • Technical support for lifetime of product

  12. Space Science Projects • ACE Advanced Composition Explorer • XMM UV Optical Monitor • MSX UVISI Detector • GUVI Global Ultraviolet Imager • SSUSI Special Sensor Ultra-violet Spectrographic Imager • UVIT Ultra-Violet Imaging Telescope

  13. Advance Composition Explorer • CRIS Detector (Cosmic Ray Isotope Spectrometer) • 40 mm Image Intensifier with 2 MCP • UV Fibre Optic Input Window • Blue Enhance Cathode to Match Scintillating Fibre Optics • 100,000 Gain • Uses scintillating fibre optic structure. The detector is to measure direction and energy of cosmic rays

  14. UV Optical Monitor • Photon Imaging 170 nm to 550 nm region • Aligned with X-Ray Telescope • Provides Simultaneous Visible, UV and X-ray Images

  15. The XMM Detector • 25 mm Photon Counting • High Sensitivity in the 170 nm to 550 nm Region • Built in Fibre Optic Taper • Concave Input Window

  16. Mid Course Space Experiment • Johns Hopkins University • Launched 24 April 96 • Part of the spectrograph on the UVISI Instrument • Diffuse and Discrete Aurora • Low Earth Atmosphere Phenomena

  17. MSX-UVISI Detector • 40 mm Photon Counting Image Intensifier • MgF2 Input Window • CsI Photocathode • 100 nm – 250 nm Response

  18. Global Ultra Violet Imager • Johns Hopkins University Applied Physics Laboratory • Launched on the TIMED Spacecraft during 2001 • TIMED is used to study the energetics and dynamicsof the Mesosphere and lower Thermosphere between an altitude of approximately 60 to 180 kilometers. • GUVI is a far-ultraviolet (115 to 180 nm), scanning imaging spectrograph that provides horizon-to-horizon images in five selectable wavelength intervals

  19. GUVI Detector • 25 mm UV Photon Counting • MgF2 Input Window • CsI Photocathode • Wedge and Strip Anode • 106 cps • 3x106 Gain

  20. Ultra-Violet Imaging Telescope • Indian Space Research Organisation (ISRO) • Due to launch on the ASTROSAT spacecraft during 2008 – now delayed until 2012. • ASTROSAT aims are to investigate the origin and mechanism of radiation emissions in active galactic nuclei. • UVIT aims to provide flux calibrated images of the sky in the far-UV, near-UV and visible spectral regions

  21. Summary • World leading space science vacuum detector manufacturer • Photek have the experience and knowledge to produce detectors to the most stringent space science requirements • Quality systems in place to ensure repeatability of detector manufacture • Test and support facilities give first class support for the lifetime of our detectors

  22. UVIT Detectors • Three 40 mm photon counting detectors • Far UV (120-180 nm) • Near UV (180-300 nm) • Visible (180-550 nm) • Integrated fibre optic taper with bondedFillFactory Star 250 CMOS sensor

  23. UVIT Detectors Photek have supplied 7 detectors for the UVIT project • NUV EM • NUV FM and FS • FUV FM and FS • VIS FM and FS

  24. UVIT Detector

  25. Outline Specification • FUV Detector 120-180nm • MgF2 Input Window • CsI Solar Blind Photocathode • 2x 60:1 40mm MCP’s • P46 Phosphor • Fibre taper output • Star250 Sensor • NUV Detector 180-300nm • Fused Silica Input Window • CsTe Solar Blind Photocathode • VIS Detector 180-550nm • Fused Silica Input Window • Low Noise S20 Photocathode

  26. Spectral Response

  27. Cathode Recess A The cathode recess is measured from the front of the DM mounting ring and the front of the input window. B C View from front of detector

  28. Window Thickness A The window thickness is an optical measurement from the photocathode surface to the outside surface of the window. B C View from front of detector

  29. Cathode to MCP Gap A The cathode gap is measured from the photocathode surface of the input window to the front of the MCP B C View from front of detector

  30. Electrical – Operating Voltages • Cathode and MCP voltage WRT ground (MCP Input). • Anode voltage WRT MCP output. • Optimal voltages are voltages as tested at Photek • The maximum specified voltages should not be exceeded • Each electrode has been over voltage (O/V) tested to the stated value

  31. Resolution

  32. FUV FM Gain Calibration -100V -50V Nominal +50V +100V Cathode -270V MCP 2580V Anode 3500V Cathode -270V MCP 2480V Anode 4000V Cathode -270V MCP 2400V Anode 4500V Cathode -270V MCP 2350V Anode 5000V Nominal Cathode -270V MCP 2300V Anode 5500V

  33. Event Size Note: The approximate FWHM of the event footprints has been measured and the results shown above for a range of operating voltages.

  34. Dark Noise Count rate graph shows variation of count rate on a 1 second timescale. 2 Hour Dark Noise Image @22C No bright defects detectable Average rate 5cps

  35. Image Alignment B A C D View from front of detector Star250 Readout

  36. Uniformity Horizontal / vertical cathode uniformity Average uniformity SD/Mean=4.5%

  37. Environmental Testing • Encapsulation of detector • 24 Hour / 40C Bake to cure Arathane • Qualification level thermal cycle • Bond Star250 sensor • Vacuum Test • Acceptance level thermal cycle • Acceptance level vibration tests • Final acceptance tests Note: Detector is tested after each stage of environmental testing

  38. Vacuum Test • Photek do not have full thermal vacuum test facilities. • The following compromise test was agreed: • Place detector in a vacuum chamber • Leave for 24 hours @20C • Increase the room temperature to 30C and leave for 48 hours • Reduce room temperature back to 20C and leave for 24 hours

  39. Thermal Cycle Qualification Level Thermal Cycle +35˚C -15˚ C +45˚C -25˚C Peaks Acceptance Level Thermal Cycle +30˚C -10˚C +40˚C -20˚C Peaks Note: Short cycles 2hrs, long cycles 24 hrs

  40. Sine Vibration

  41. Random Vibration

  42. Thank you for listening

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