MYTHEN Project

Contact: bernd.schmitt@psi.ch

The MYTHEN detector system (microstrip system for time resolved experiments) allows to make time resolved powder diffraction measurments, which would be almost impossible to conduct without this detector. It is a microstrip detector system with about 15'000 channels covering 60º in 2theta. All channels work independently in parallel. Each channel has a charge sensitive amplifier, a comparator and a counter. Compared to a standard analyzer detector, the measurement time is reduced from several hours to seconds or less.

The intrinsic resolution is 0.004º, which is however limited by the sample diameter to, e.g. 0.011º for a 100 µm capillary. The readout time for the entire detector is 250 µs. At a later stage, frame rates up to 10 kHz are foreseen.

MYTHEN Detector Module

		Silicon sensor: 1280 strips 8 mm long 50 µm pitch 300 µm thick.
		Read out chip: 128 channels low noise preamp (noise ≈ 230 e-) 18 bit counter Read-out time: 250 µm Count rate: 1 Mhz per channel

MYTHEN Detector System

		Detector System: Angular coverage: 60º Number of channels: 15'000 Angular resolution: 0.004º Read-out time: 250 µm
		Application: The MYTHEN Detector System is especially suited for the study of time resolved powder diffraction experiments.