Teledyne Princeton Instruments PI-MTE, System Manual

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Chapter 2: PI-MTE System Overview
This chapter provides information about the PI-MTE Camera and the ST-133 Controller,
as well as available accessories and recommended care instructions.
2.1 PI-MTE Camera
The PI-MTE camera is ideally suited for operation
inside a vacuum chamber. State-of-the-art CCD
arrays are available for the PI-MTE camera that
enable outstanding performance in a wide range of
X-ray Imaging and Spectroscopy applications. The
PI-MTE camera is also suitable for medium-low
light applications that require small size or steel
case ruggedness.
PI-MTE cameras have three distinct sections:
• The front enclosure contains the CCD array seated on a cold finger. This finger
is in turn seated on a two-stage Peltier thermoelectric cooler.
• The middle enclosure contains the heat exchanger.
• The rear enclosure contains the preamplifier and array driver boards. This keeps
all signal leads to the preamplifier as short as possible, and also provides RF
shielding.
2.1.1 CCD Arrays
The PI-MTE:1300B and PI-MTE:2048B incorporate a back-illuminated CCD without AR
coating for very low-energy x-ray detection. With 20 x 20-micron (1300B) or
13.5 x 13.5-micron (2048B) pixels and 100% fill factor, these systems offer a large
imaging area with very high spatial resolution and dynamic range.
2.1.2 Cooling
Dark current is significantly reduced in PI-MTE camera systems through liquid-assisted
Thermo-electric (TE) cooling of the CCD array.
2.1.2.1 Peltier
An internal Peltier device directly cools the cold finger on which the CCD is mounted.
The heat produced by the Peltier device is then removed by conduction to the internal
heat sink. Heat is transferred out of the camera by the flow of coolant through the heat
sink.
2.1.2.2 Coolant Ports
Two ¼-inch coolant ports are located at the rear of the camera. Connection to a
vacuum flange is via VCR fittings (or Swagelok fittings) and stainless steel, flexible hoses.
Refer to
Section 4.11, Make the Coolant Connections , on page 37 for information about
configuring coolant flow.
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