FOC Roper Scientific CCD 1340x1300 camera

Introduction

This camera is a Roper Scientific PI SCX90-1300 model which pixel size is 50x50um on the fluorescent screen used by X-rays.

It consist in a grade 1 MMP CCD detector, Marconi CCD36, with 1340x1300 pixels of 20x20um on the chip. This detector is coupled by optic fibers with magnification 2.5:1 to fluorescent GdOs screens optimised for 17keV or for 8keV protected of the light by a berylium window. Then the effective pixel size for X-ray measurement is 50x50um.

The detector is used with Peltier cooling at -50C where its dark current is lower than 0.06 e/pixel/s. The reading noise is given for 4-5 e at 100 kHz and 10-12 at 500kHz. The ADC converter works on 16 bits. The capacity can store up to 100k e/pixel but with 250k in 2x2 binning

This camera has to be run with the ST-133 controler which incorporates a temperature control module with ramps.

In the experiment setup, the acquisition mode is can be defined as

• High capacity
• Low noise

This two modes use different output on the chip and the images are reverted between them.

Distortions