Speaker
Description
The CEPC C-band accelerating section requires a large
number of high-power RF units. To reduce the number
of RF sources and simplify the RF distribution system, an
80 MW klystron-based one-to-four scheme is proposed, in
which a single RF source feeds four accelerating structures.
Based on the RF power budget, the pulse compressor is
required to provide a peak output power above 250 MW with
a power gain of approximately 4 or higher. Accordingly, a C-
band RF system incorporating a spherical pulse compressor
is designed. The compressor operates at 5712 MHz and
employs a TE114 dual-mode spherical cavity together with a
3 dB circular polarization mode converter that excites two
orthogonal TE11 modes with nearly equal amplitudes and a
90◦ phase difference. The optimized cavity has an unloaded
quality factor of 126000 and a coupling coefficient of 5.43,
corresponding to an energy multiplication factor of 2.0. With
a 3 𝜇s input pulse and a phase reversal at 2.65 𝜇s, the output
pulse is compressed to approximately 350 ns, reaching a
peak output power of about 516 MW and a peak power gain
of 6.45. These results establish the RF design and pulse
compression performance of the proposed C-band spherical
pulse compressor for the CEPC one-to-four accelerating
unit.
| I have read and accept the Privacy Policy Statement | Yes |
|---|