Facilities
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Microscopy
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HRSEM-CL Facility
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| Description |
Cathodoluminescence (CL) is the emission of light (from UV to IR regime) from a material as a result of excitation by electron beam. CL augmented in a high resolution scanning electron microscope (HRSEM) fitted with a spectrometer, light collection and detection system offers a powerful material analysis tool to obtain simultaneous acquisition of CL spectroscopy and imaging data with high spatial resolution and depth resolution from a luminescent material in addition to other available morphological information of the SEM mode of operation. |
| Manufacturer of HRSEM |
Carl Zeiss NTS GmbH, Germany |
| Manufacturer of CL set up |
Gatan UK |
| Model of HRSEM |
Carl Zeiss Supra 40 |
| Model of CL |
Gatan MonoCL3 |
| Installation |
March, 2010 at the ground floor of Phase IV building |
| Important features of the CL system |
* Direct optical coupling to chamber mounted monochromator
* Retractable, detachable diamond turned parabolid mirror
* Panchromatic and monochromatic mode of imaging
* Micrometer slits for controlling spectral resolution and band pass
* Peltier-cooled high sensitivity photomultiplier tube (HSPMT) sensitive in the range 165 nm to 930 nm wavelength of CL emission with integral pre-amplifier and 1200 lines/mm grating blazed at 500 nm
* LN2 cooled Ge detector sensitive in the range 800 nm to 1800 nm and an additioanl grating of 600 lines/mm blazed at 1000 nm
* Liquid He and Liquid N2 flow based sample cooling stage for imaging and spectroscopic work in the temperature range 6K - 300K.
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| Important features of the HRSEM system |
* High stability Schottky type field emitter
* Resolution : 1.0 nm at 20 kV; 1.3 nm at 15 kV; 2.1 nm at 1 kV
* Acceleration voltage : 100 V to 30 kV
* Annular In-lens SE detector and chamber SE detector
* High resolution BSD detector (retractable under vacuum)
* Ion getter pumped column and TMP with rotary backing having oil traps, oil mist filter to gurantee contamination free vacuum environment in the analysis chamber |
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Last Updated on Wednesday, 17 August 2016 14:24
