Statement_of_Work_-_CCD_Detector.docx

STATEMENT OF WORK

TITLE: Large Area Soft X-ray CCD Detector LAB REQUESTING SERVICE: Material Measurement Laboratory, Polymers Processing Group of the Material Science and Engineering Division

I. BACKGROUND INFORMATION

Large-area high-sensitivity detectors are necessary to collect the relatively weak scattering of soft X-rays from low Z materials, which are prone to beam damage. The use of soft X-rays requires that the full flight path of the X-rays be at ultra-high vacuum. Additionally, because the interaction depth of Soft X-rays is different than light, special thinned back-illuminated Charge Coupled Devices (CCDs) must be used for direct detection of the X-rays (the most sensitive detection method). This detector will be the main data collection element of a soft X-ray scattering facility to be installed at the NIST beamline SST-1 at the National Synchrotron Light Source-II within the NIST suite of beamlines of Brookhaven National Laboratory in Upton, New York.

II. SCOPE OF WORK

Purchase of a direct detection back-illuminated, uncoated CCD camera system The Contractor shall provide one (1) CCD Soft X-ray detector system with the following characteristics:

Detector Requirements:

Figure 1. Schematic of Detector system installed in UHV Chamber.

1. The active area of the CCD detector shall be greater than 60 mm x 60 mm

2. The detector system shall be mounted and entirely supported on a 10 inch standard ConFlat (CF) flange, with the sealing knife edge facing away from the CCD image plane, as shown in Figure 1.

3. The outer body of the detector (in atmosphere) shall be operational while contained in an open-ended metal cylinder of diameter ~9 inches (the metal cylinder is not part of this scope of work) extending between 12 inches and 18 inches from the flange on the atmospheric side, as shown schematically in Figure 1.

4. All cables and connectors shall be removable and attach to the back, atmospheric face of the detector, as shown in Figure 1.

5. The CCD image plane shall be mounted at 45 degrees to the flange face, as shown in Figure 1.

6. The far edge of the CCD shall extend into vacuum a distance such that, when installed, a ray perpendicular to the CCD face which just misses the CCD and mounting bracket assembly which holds the CCD, at the furthest extent away from the flange on the vacuum side shall not be impeded by anything else on the detector assembly including but not limited to the flange edge (which may be thinned at this location), or mounting bolts (which may be countersunk). This limiting geometry is shown in Figure 1.

7. The detector face and components, including the CCD itself, forward from the flange knife edge, including all mounting bolts and bolt holes of the flange, shall be compatible with an ultra-high vacuum environment of less than 10^-8 mBar, both at rest and while in operation.

8. The detector pixel dimensions shall be less than 20 um X 20 um.

9. The detector point spread function shall be less than 40 um X 40 um.

10. The quantum efficiency of the detector shall be greater than 50% for 100 - 2000 eV radiation and greater than 70% for 300 eV – 1000 eV radiation incident upon the active area.

11. The detector system shall include an internal cooling system to allow the CCD to reach operating temperatures below -70 °C to be contained within the detector flange mounted unit. This cooling system shall require a flow of chilled water through the detector (supplied by separate chiller – see point 27) through removable connectors on the atmospheric side of the flange mounted detector to maintain this operating temperature.

12. Dark noise levels in the cooled CCD shall be less than 0.05 electrons / 40 um x 40 um area / second.

13. Gain within the detector system shall be changeable from ~ 1 digital unit/electron up to a gain that accommodates the maximum non-saturated signal level.

14. Detector readout dynamic range shall be greater than or equal to 16 bits/pixel.

15. Detector readout options shall include binning (allowing effective pixel sizes of ~40 um and ~100um on a side to be selected) and ROI (region of interest) selection in hardware, which will allow commensurately increased read out speeds.

16. Overall linearity of detector response (slope of signal vs photons) shall be greater than 99% over the usable dynamic range.

17. The read noise levels of the detector shall be less than 10 electrons at 1MHz readout.

18. The full well depth shall total >1,000,000 electrons in a 40x40 micron area.

19. At a level of read noise of fewer than 10 electrons per pixel full frame, unbinned readout shall take less than 5 seconds.

20. At a level of binning which allows a resolution finer than 100 um x 100 um, and a level of read noise of fewer than 10 electrons/pixel, read out times shall be less than 1 second.

21. The CCD shall contain fewer than 0.01% “white” pixels which display dark generation rate of > 5 electrons / second at 173K

22. The CCD shall contain fewer than 0.01% total combination of white (as defined in point 21) and “black” pixels, which display less than 50% of the photo response of the local mean.

23. The CCD shall contain no more than 1 trap of greater than 200 electrons for every million pixels.

24. The CCD shall contain no more than 0.25% of columns which contain more than 2.5% white or black defects as defined in points 21 and 22.

25. Electronic signals shall be available via connectors on the exterior atmospheric side of the camera including trigger inputs and exposure output signals to allow controls integration.

26. The system shall include all necessary control electronics, cables, hardware, and software necessary for operation.

27. The system shall include all necessary equipment including chiller, piping, and connection hardware necessary for running chilled water through the detector.

28. The system shall include a networkable computer system including all required hardware and software control interfaces to allow user control of exposure, gain, triggering, binning, and readout settings and allow standalone readout of images.

a. Minimum specs for the computer are:

i. Window 7 or 10 professional / Apple OSX 10.6 or later operating system

ii. Intel Core i7 6th generation / Xeon E3 or newer

iii. >32 GB RAM

iv. >1 TB hard drive

v. Keyboard, mouse

vi. 24” LCD screen

vii. Gigabit Ethernet

29. In addition to standalone software, Application Program Interface (API) access to all settings and data readout shall be provided in forms accessible to common control languages including EPICS, Labview and Python.

Contract Option:

A second identical CCD camera system (and necessary control electronics\computer, cables, hardware for operation) to be exercised either simultaneously with first detector or within a period of 2 years. Proposals may include option pricing with price breaks that are dependent on the time after award.

Warranty:

The Contractor shall provide, at a minimum, a one year warranty for the equipment. The warranty shall cover all parts, labor and travel. The warranty shall commence upon successful completion of delivery and government acceptance that the equipment meets all required specifications.

III. PERIOD OF PERFORMANCE

The period of performance shall be ten (10) months for delivery, and one (1) year of warranty period after government acceptance of the delivered equipment.

Optional Line Item:

The option for a second CCD camera system may be exercised at the time of award or any time within 24 months from the date of award.

IV. DELIVERABLES

Option Delivery of second detector system

V. ACCEPTANCE CRITERIA SUMMARY

VI. PAYMENT TERMS

The Contractor may invoice in one lump sum upon acceptance of equipment. Advance payments are not authorized. Partial payments are not authorized.

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