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Company profile
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


Company profile1
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


Detector products
Detector Products

  • MCP image intensifier

  • Ultra fast MCP photomultipliers

  • Streak tubes

  • Magnetic focus image intensifiers

  • De-magnifying gen 1 image intensifiers

  • Vacuum compatible detectors


Camera products
Camera Products

  • Photon counting

  • Nanosecond ICCD

  • Intensified CCD

  • Fluorescence

  • X-ray

  • Particle imaging


Electronic products
Electronic Products

  • HT power supplies

  • Nanosecond gating control

  • Laser pulse generator

  • Preamplifier

  • Image intensifier cooling


Applications
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


Facilities
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


Facilities continued
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


Quality
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


Test and support
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


Space science projects
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


Advance composition explorer
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


Uv optical monitor
UV Optical Monitor

  • Photon Imaging 170 nm to 550 nm region

  • Aligned with X-Ray Telescope

  • Provides Simultaneous Visible, UV and X-ray Images


The xmm detector
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


Mid course space experiment
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


Msx uvisi detector
MSX-UVISI Detector

  • 40 mm Photon Counting Image Intensifier

  • MgF2 Input Window

  • CsI Photocathode

  • 100 nm – 250 nm Response


Global ultra violet imager
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


Guvi detector
GUVI Detector

  • 25 mm UV Photon Counting

  • MgF2 Input Window

  • CsI Photocathode

  • Wedge and Strip Anode

  • 106 cps

  • 3x106 Gain


Ultra violet imaging telescope
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


Summary
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


Uvit detectors
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


Uvit detectors1
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



Outline specification
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



Cathode recess
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


Window thickness
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


Cathode to mcp gap
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


Electrical operating voltages
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



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


Event size
Event Size

Note:

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


Dark noise
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


Image alignment
Image Alignment

B

A

C

D

View from front of detector

Star250 Readout


Uniformity
Uniformity

Horizontal / vertical cathode uniformity

Average uniformity

SD/Mean=4.5%


Environmental testing
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


Vacuum test
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


Thermal cycle
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





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