Speaker
Description
X-band high-gradient accelerating technology is a key innovation for building more compact linacs. A prime example is the Very Compact Inverse Compton Scattering Gamma-ray Source (VIGAS) at Tsinghua University -- a light source where a high-quality electron beam, accelerated to over 320 MeV by X-band structures, collides with a laser pulse to generate tunable gamma-rays with photon energies up to 4.8 MeV. The system has now completed commissioning and is conducting experiments for photon applications. This talk presents recent comprehensive progress in X-band linac development at Tsinghua University, covering integrated design, precision fabrication, advanced non-contact tuning, and rigorous high-gradient testing.
The core advantage of this technology is its ability to sustain accelerating gradients above 80 MV/m—significantly higher than conventional S-band or C-band systems. Since commercially available klystrons provide limited peak power, advanced pulse compressors like the SLED-I type used in VIGAS are essential. They multiply the input power and shorten the pulse to match the structure's filling time, enabling efficient and stable operation at the target gradient.
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