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Title: High-precision phase detection in femtosecond timing and synchronization system for TXGLS

Journal Article · · Measurement Science and Technology
ORCiD logo [1]; ORCiD logo [2];  [2];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [3]
  1. 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
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Tsinghua Univ., Beijing (China). Dept. of Engineering Physics; Tsinghua Univ., Beijing (China). Beijing Key Lab. of Particle and Radiation Imaging
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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

References (6)

A survey of CORDIC algorithms for FPGA based computers conference January 1998
Stable transmission of radio frequency signals on fiber links using interferometric delay sensing journal January 2009
An economical class of digital filters for decimation and interpolation journal April 1981
Laser–RF synchronization based on digital phase detector journal March 2017
Drift-free femtosecond timing synchronization of remote optical and microwave sources journal November 2008
The CORDIC Trigonometric Computing Technique journal September 1959

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