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Good gradients in seconds flat

Fermilab scientists turn their attention to individual cavities to improve beam stability

| 4 August 2011

A constant acceleration gradient along many thousands of particle bunches provides for a particle beam’s sure-footed climb to higher energies, readying the beam for collision by providing the same acceleration for each bunch. But constant gradients don’t come naturally for accelerating cavities, the elements that pave the particles’ ascending path. A cavity has to be […]

Achieving cavity resonance

DESY scientists fine-tune cavity frequencies

| 7 July 2011

Accelerator scientists have been busy creating and combining sine waves and nonlinear curves to form a straight, horizontal line – the flat top of a signal pulse of electric field-accelerating electrons. The flat, even profile signifies the untroubled transfer of power from source to electrons, one that occurs when a cavity is in tune with […]

All aboard the long bunch train

Collaborators for the ILC and for DESY’s FLASH facility learn from long bunch train studies at a recent workshop

| 30 June 2011

For all the complicated engineering and hulking structures involved in operating particle accelerators, it’s the tiny, invisible particle beam at the centre of everything that is the machine’s reason for being. A probe for burrowing into subatomic places or a light to shine on molecular forms, the beam is science’s exploratory tool for the universe’s […]