High-precision phase detection in femtosecond timing and synchronization system for TXGLS
- Tsinghua Univ., Beijing (China). Dept. of Engineering Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tsinghua Univ., Beijing (China). Beijing Key Lab. of Particle and Radiation Imaging
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Tsinghua Univ., Beijing (China). Dept. of Engineering Physics; Tsinghua Univ., Beijing (China). Beijing Key Lab. of Particle and Radiation Imaging
High-precision phase detection is critical to the timing and synchronization system for particle accelerators. A live calibration signal is introduced to femtosecond-level phase detection in order to measure the relative phase jitter between a reference wave and a radio frequency (RF) signal, and compensate for the cable electrical length drift due to the thermal variation effect. Non-IQ sampling and 2-stage cascaded integrator-comb filters are integrated into the field-programmable gate array-based digital signal processing to reduce spectrum aliasing and suppress noise. Fine adjustment of hardware components has been made to ensure the isolation between different signals and the linearity over the full-range power level. Lastly, we have achieved a 6.3 fs root mean square timing jitter for a 2856 MHz RF signal in a single channel, compared to the theoretical limit of 5.1 fs for the current hardware component.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1461144
- Journal Information:
- Measurement Science and Technology, Vol. 29, Issue 6; ISSN 0957-0233
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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