Inboard Detectors

The inboard microscope has the following detectors installed:

Segmented Silicon Detector

(SIDET) This is the main detector on the inboard microscope. It is divided into several segments and can therefore measure phase contrast. If all segments are summed up, it also measures total transmitted intensity like the proportional counter. This detector works like a photodiode, which means the incident x rays create charges in a silicon chip which are collected. The primary signal is a voltage which can be converted to a photon count rate through a rather complicated calibration process (see Sec. 10.7). Note:

• This detector is sensitive to visible light, so that you have to shield the microscope chamber with black cloth when operating.

• This detector has a rather strong background which can vary with ambient temperature, so that it requires frequent calibration (see Sec. 10.7).

Visible Light Microscope

(VLM) See above.

Lumi

The third lot on the inboard detector stage is currently occupied by a luminescence detector, which is not used by general users.