TOF Clock System for BES III

Author

Li, Hao ; Liu, Shubin ; Feng, Changqing ; Tang, Shaochun ; An, Qi

Author_Institution

Dept. of Modern Phys., Univ. of Sci. & Technol. of China, Hefei, China

Volume

57

Issue

2

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

442

Lastpage

445

Abstract

In this paper, a system for providing a precisely timed clock to the time-of-flight (TOF) electronics at Beijing Spectrometer (BES III) is presented. System functions include radio-frequency reference signal transmission and low-jitter clock regeneration and distribution. A new clock synchronizing and monitoring mechanism is developed with off-the-shelf devices to synchronize the clock signal to the beam bunches. The measured short-term jitter performance of the system is 11 ps worst case, and robust synchronization to the beam bunches has also been demonstrated. The system has been installed and is operating reliably.

Keywords

nuclear electronics; particle beam bunching; particle spectrometers; timing circuits; timing jitter; BES III; Beijing spectrometer; TOF clock system; beam bunches; clock signal; low-jitter clock regeneration; monitoring mechanism; off-the-shelf devices; phase stabilized optical fiber; radio-frequency reference signal transmission; robust synchronization; time-of-flight; Aerospace electronics; Clocks; Monitoring; Optical fibers; RF signals; Radio frequency; Signal generators; Synchronization; Time measurement; Timing jitter; Clock jitter; clock synchronization; phase stabilized optical fiber (PSOF); time-of-flight (TOF) electronics;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2009.2034659

Filename

5446499