13
Chapter 2
System Component Descriptions
PI-MTE Camera
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 20×20-micron
(1300B) or 13.5×13.5-micron (2048B) pixels and 100% fill factor, these systems offer a
large imaging area with very high spatial resolution and dynamic range.
Cooling: Dark current is significantly reduced in PI-MTE camera systems through
liquid-assisted Thermo-electric (TE) cooling of the CCD array.
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 heatsink. Heat is transferred out of the camera by the flow of coolant
through the heatsink.
Coolant Ports: Two 1/4" 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. Instructions for setting up coolant flow are provided on
page 32.
Controller Connector: Power, control signals, and data are transmitted between the
ST-133 and the PI-MTE camera via the 25-pin D connector located on the rear of the
camera. Controller power must be OFF before connecting to or disconnecting from
this connector or to the equivalent connector on a vacuum flange.
ST-133 Controller
Electronics: The ST-133 controller is a compact, high performance CCD Detector
Controller for operation with Princeton Instruments brand
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detectors. Designed for high
speed and high performance image acquisition, the ST-133 offers data transfer at speeds
up to 1 megapixel per second, standard video output for focusing and alignment. A
variety of A/D converters are available to meet different speed and resolution
requirements.
In addition to containing the power supply, the controller contains the analog and digital
electronics, scan control and exposure timing hardware, and controller I/O connectors,
all mounted on user-accessible plug-in modules. This highly modularized design gives
flexibility and allows for convenient servicing.
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The ST-133 controller must be factory configured for operation with a TE-cooled camera. For
this reason, a controller purchased for operation with a TE-cooled camera can only be used with
TE-cooled camera. It cannot be used to control an LN-cooled camera.