<div dir="ltr"><font face="arial, sans-serif">Dear all</font><div><br></div><div>We will have the first lunch seminar after the summer break today. Title of the talk<span style="font-family:arial,sans-serif;font-size:13px"> "Laser-driven acceleration". As usual we will meet around noon for lunch with the talk starting around 12:15pm.</span></div>
<div>Please see below for the abstract. </div><div><br></div><div>Cheers</div><div> John, Yasu, Bjoern</div><div><br></div><div><br style="font-family:arial,sans-serif;font-size:13px"><span style="font-family:arial,sans-serif;font-size:13px">Abstract:</span><br style="font-family:arial,sans-serif;font-size:13px">
<br style="font-family:arial,sans-serif;font-size:13px"><span style="font-family:arial,sans-serif;font-size:13px">Continual improvements in particle accelerators over the last century have driven major discoveries in particle physics. With the size and cost of new energy-frontier machines based on existing technology becoming prohibitive, fundamentally new accelerator concepts are being investigated to enable future high-energy colliders. With the significant advances in laser technology over the past several decades, laser-driven particle acceleration has become a highly attractive avenue for research. We present an overview of two laser-driven accelerator concepts. In dielectric laser acceleration (DLA), conventional metallic structures operating at microwave frequencies are replaced by optical-scale dielectric structures. We describe several possible accelerator configurations and show how concepts from conventional accelerators can carry over to the optical regime. In laser-plasma acceleration (LPA), a high-energy laser pulse drives a plasma wave, leading to extraordinarily high accelerating gradients. We describe the physics of this process, and review recent advances in the field. For both accelerator concepts, we discuss the challenges involved in developing a high-energy collider.</span><br>
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