This is a used CCD detector made by Mar, model CCD165.

• 165 mm diameter active detection area, 61 mm x 61 mm
• Closed cycle refrigeration: Cooling head for PT30 gas
• Detective quantum function: Up to 0.8 for 8keV to 12keV RAD.
• Point spread function: FWHM = 100 um: FW 1%M = 300um
• Gain: 6e/12keV photon
• Dynamic range: 16 bits
• Fiber optic taper: 2.7:1 demagnification ratio
• CCD operating temperature: -70 deg C
• Readout electronics: 4 channel readout; 16 bit ADC's, provides higher image frame rates than single or two channel systems