| DATE: |
2012-09-07 14:00 - 15:00 |
| PLACE: |
#1 meeting room, 2nd floor, 4 go kan |
| TITLE: |
IMSS seminar (12-21)””New Developments at DECTRIS |
| CONTACT: |
Prof. Soichi Wakatsuki 5631 |
| SPEAKER: |
Dr. Clemens Schulze-Briese (DECTRIS Ltd.) |
| LANGUAGE: |
English |
| ABSTRACT: |
The PILATUS pixel and MYTHEN strip detectors have transformed synchrotron radiation data collection by combining noise-free counter properties with highest data acquisition rates. These features enable optimized data acquisition modes and new experimental techniques. The PILATUS detector is a modular two-dimensional hybrid pixel array detector, while the MYTHEN detector is a one-dimensional strip detector.
Based on these technologies several new developments have been made.
1. To enable measurements with ultra-soft X-rays and to optimize data quality, PILATUS modules were characterized and tested under vacuum conditions, allowing the construction of customized in-vacuum detectors: A PILATUS 1M was installed at the BESSY-2 FCM beamline for SAXS measurements at energies from 1.75 to 10 keV. A PILATUS 12M consisting of 120 detector modules in vacuum arranged in a large semi-cylindrical shape is being built for the DLS Long Wavelength MX beamline I23. A PILATUS 100K with optimized module geometry will be installed in-vacuum at the inelastic X-ray scattering beamline BL43LXU at SPring-8.
2. To enhance the detection efficiency for hard X-ray applications, Silicon sensors with increased thickness of 450 and 1000 µm have been developed. Their characteristics have been measured over a wide energy range from 1.75 (in vacuum) to 60 keV (in air), confirming that the quantum efficiency for hard X-rays is increased as theoretically expected, while the ideal spatial resolution (point spread function of one pixel size) is maintained.
3. A new version of the PILATUS readout chip has been developed and tested. It will be used in the PILATUS3 detector series. It features higher count rates (of up to 107 photons/s/pixel), higher readout speeds (<1 ms full readout) and enhanced global stability. This enables better accuracy in the highest intensity diffraction spots/rings and faster data acquisition.
4. MYTHEN detectors are ideally suited to detect isotropic scattering signals as encountered in powder diffraction or solution scattering. New mechanics for 6 or 24 modules allow to cover 30 and 120 ”ė, respectively, thereby enabling high-throughput experiments and time-resolved studies.
5. The EIGER pixel detector represents the next generation of DECTRIS pixel detectors. With a pixel size of 75 µm, frame rates up to 3000 Hz and a dead-time of 3 µs it will enable radically new experiments.
These developments will be presented along with the corresponding measurement results.
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