Angular measurement goes nano

At Diamond Light Source we have built and developed a state-of-the art optical metrology laboratory which is equipped with instruments to test and inspect extremely precise mirrors used to focus X-rays for Diamond’s beamlines.

To calibrate this measuring equipment we needed a device that can produce very tiny angle changes in a precise and controlled way.

Imagine a 1m long spirit level set on a flat surface, then place a 1mm spacer under one end. That gives an angular change of 1/1,000 of a radian or 1 milliradian. Radians are an alternative way of describing angles instead of degrees.

Now, instead of a 1m spirit level, we use a 1000km long spirit level, with a 1mm spacer under one end. This would create an angular change of  1 nanoradian, which is exactly what Diamond’s Nano-angle generator (NANGO) can accuractely create.

Image: Diamond-NANGO, with its rotation axis pointing in the horizontal direction.

SESAME light source brings second beamline into service

Allan, Jordan, 30 April 2018. At 11:21 pm local time (GMT +3) scientists at the SESAME light source brought the laboratory’s infrared (IR) spectromicroscopy beamline into service for the first time.

This beamline is a completely new beamline. It was designed and built in collaboration with the French Soleil Synchrotron. It is SESAME’s second operational beamline, and it joins an X-ray beamline that saw first light on 23 November 2017. The addition of the IR beamline will enable the application of infrared microspectroscopy and imaging in a wide range of fields, including surface and materials science (e.g. characterization of new nanomaterials for solar cell fabrication and for drug delivery mechanisms), biochemistry, archaeology, geology, cell biology, biomedical diagnostics and environmental science (e.g. air and water pollution)

“I’ve been waiting a long time for this moment,” said Gihan Kamel, SESAME’s IR beamline scientist. “It’s very satisfying to see light in the beamline, and to be able to start doing research here that we previously had to travel to Europe to carry out.”

In preparation for the SESAME research programme, a number of thematic schools are being held across the region in a collaboration involving SESAME and European partners including the European Union through its Open SESAME project. One of these was held at SESAME earlier this month, covering science on the IR beamline. Students came from across the region and learned techniques ranging from sample preparation to data analysis.

“The infrared beamline has a mouth-watering research programme lined up,” said SESAME Scientific Director Giorgio Paolucci, “and it is great to see so many young people from across the region preparing to embark on careers in science.”

>Read more on the SESAME website

First light for pioneering SESAME light source

This is of particular significance since this is the first high-energy accelerator in the Middle East.

On the 22th November et 10:50 in the morning scientists at the pioneering SESAME light source saw First Monochromatic Light through the XAFS/XRF (X-ray absorption fine structure/X-ray fluorescence) spectroscopy beamline, signalling the start of the laboratory’s experimental programme. This beamline, SESAME’s first to come on stream, delivers X-ray light that will be used to carry out research in areas ranging from solid state physics to environmental science and archaeology.

“After years of preparation, it’s great to see light on target,” said XAFS/XRF beamline scientist Messaoud Harfouche. “We have a fantastic experimental programme ahead of us, starting with an experiment to investigate heavy metals contaminating soils in the region.”

The initial research programme will be carried out at two beamlines, the XAFS/XRF beamline and the I nfrared (IR) spectromicroscopy beamline that is scheduled to join the XAFS/XRF beamline this year. Both have specific characteristics that make them appropriate for various areas of research. A third beamline, in this case devoted to materials science, will come on stream in 2018.

>Read More on the SESAME website

Image: SESAME XAFS/XRF beamline scientist, Messaoud Harfouche, points out SESAME’s first monochromatic light.
Credit: SESAME

Opening ceremony of SESAME

The SESAME light source was officially opened by His Majesty King Abdullah II on 16 May.

His Majesty was welcomed by the President of the SESAME Council, Sir Chris Llewellyn Smith, and the President Elect, Professor Rolf Heuer, both former Directors General of CERN, the Director, Professor Khaled Toukan, H.R.H. Princess Sumaya bint El Hassan, the Prime Minister of Jordan, H.E. Mr Hani Al-Mulki, and the Administrative Director, Professor Yasser Khalil.
The King unveiled a plaque marking the official opening of the laboratory and visited the experimental hall.

SESAME’s 800 MeV booster synchrotron is now in operation

This is of particular significance since this is the first high-energy accelerator in the Middle East.

After having successfully stored electrons from the 20 MeV Microtron in the Booster in July 2014, on 3 September 2014, the SESAME team succeeded in accelerating the electrons in the Booster to their final energy of 800 MeV.

The SESAME Injector consists of a 20 MeV Microtron and the 800 MeV Booster-Synchrotron. Electrons are produced in the Microtron where they are accelerated to 20 MeV (Million Electron Volt), and these electrons are then transferred to the Booster-Synchrotron.

SESAME’s Microtron became operational in 2012, installation of its Booster was completed in 2013, and storage in the Booster, in July 2014, of the electrons from the Microtron meant that they were then circulating several million of turns in the Booster at their initial energy of 20 MeV.